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3325 lines
89 KiB
3325 lines
89 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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* handling kvm guest interrupts |
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* |
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* Copyright IBM Corp. 2008, 2020 |
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* |
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* Author(s): Carsten Otte <[email protected]> |
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*/ |
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#define KMSG_COMPONENT "kvm-s390" |
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#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt |
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#include <linux/interrupt.h> |
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#include <linux/kvm_host.h> |
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#include <linux/hrtimer.h> |
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#include <linux/mmu_context.h> |
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#include <linux/nospec.h> |
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#include <linux/signal.h> |
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#include <linux/slab.h> |
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#include <linux/bitmap.h> |
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#include <linux/vmalloc.h> |
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#include <asm/asm-offsets.h> |
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#include <asm/dis.h> |
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#include <linux/uaccess.h> |
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#include <asm/sclp.h> |
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#include <asm/isc.h> |
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#include <asm/gmap.h> |
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#include <asm/switch_to.h> |
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#include <asm/nmi.h> |
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#include <asm/airq.h> |
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#include "kvm-s390.h" |
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#include "gaccess.h" |
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#include "trace-s390.h" |
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#define PFAULT_INIT 0x0600 |
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#define PFAULT_DONE 0x0680 |
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#define VIRTIO_PARAM 0x0d00 |
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static struct kvm_s390_gib *gib; |
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/* handle external calls via sigp interpretation facility */ |
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static int sca_ext_call_pending(struct kvm_vcpu *vcpu, int *src_id) |
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{ |
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int c, scn; |
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if (!kvm_s390_test_cpuflags(vcpu, CPUSTAT_ECALL_PEND)) |
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return 0; |
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BUG_ON(!kvm_s390_use_sca_entries()); |
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read_lock(&vcpu->kvm->arch.sca_lock); |
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if (vcpu->kvm->arch.use_esca) { |
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struct esca_block *sca = vcpu->kvm->arch.sca; |
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union esca_sigp_ctrl sigp_ctrl = |
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sca->cpu[vcpu->vcpu_id].sigp_ctrl; |
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c = sigp_ctrl.c; |
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scn = sigp_ctrl.scn; |
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} else { |
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struct bsca_block *sca = vcpu->kvm->arch.sca; |
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union bsca_sigp_ctrl sigp_ctrl = |
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sca->cpu[vcpu->vcpu_id].sigp_ctrl; |
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c = sigp_ctrl.c; |
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scn = sigp_ctrl.scn; |
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} |
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read_unlock(&vcpu->kvm->arch.sca_lock); |
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if (src_id) |
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*src_id = scn; |
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return c; |
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} |
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static int sca_inject_ext_call(struct kvm_vcpu *vcpu, int src_id) |
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{ |
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int expect, rc; |
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BUG_ON(!kvm_s390_use_sca_entries()); |
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read_lock(&vcpu->kvm->arch.sca_lock); |
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if (vcpu->kvm->arch.use_esca) { |
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struct esca_block *sca = vcpu->kvm->arch.sca; |
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union esca_sigp_ctrl *sigp_ctrl = |
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&(sca->cpu[vcpu->vcpu_id].sigp_ctrl); |
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union esca_sigp_ctrl new_val = {0}, old_val = *sigp_ctrl; |
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new_val.scn = src_id; |
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new_val.c = 1; |
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old_val.c = 0; |
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expect = old_val.value; |
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rc = cmpxchg(&sigp_ctrl->value, old_val.value, new_val.value); |
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} else { |
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struct bsca_block *sca = vcpu->kvm->arch.sca; |
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union bsca_sigp_ctrl *sigp_ctrl = |
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&(sca->cpu[vcpu->vcpu_id].sigp_ctrl); |
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union bsca_sigp_ctrl new_val = {0}, old_val = *sigp_ctrl; |
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new_val.scn = src_id; |
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new_val.c = 1; |
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old_val.c = 0; |
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expect = old_val.value; |
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rc = cmpxchg(&sigp_ctrl->value, old_val.value, new_val.value); |
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} |
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read_unlock(&vcpu->kvm->arch.sca_lock); |
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if (rc != expect) { |
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/* another external call is pending */ |
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return -EBUSY; |
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} |
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kvm_s390_set_cpuflags(vcpu, CPUSTAT_ECALL_PEND); |
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return 0; |
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} |
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static void sca_clear_ext_call(struct kvm_vcpu *vcpu) |
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{ |
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int rc, expect; |
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if (!kvm_s390_use_sca_entries()) |
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return; |
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kvm_s390_clear_cpuflags(vcpu, CPUSTAT_ECALL_PEND); |
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read_lock(&vcpu->kvm->arch.sca_lock); |
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if (vcpu->kvm->arch.use_esca) { |
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struct esca_block *sca = vcpu->kvm->arch.sca; |
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union esca_sigp_ctrl *sigp_ctrl = |
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&(sca->cpu[vcpu->vcpu_id].sigp_ctrl); |
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union esca_sigp_ctrl old = *sigp_ctrl; |
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expect = old.value; |
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rc = cmpxchg(&sigp_ctrl->value, old.value, 0); |
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} else { |
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struct bsca_block *sca = vcpu->kvm->arch.sca; |
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union bsca_sigp_ctrl *sigp_ctrl = |
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&(sca->cpu[vcpu->vcpu_id].sigp_ctrl); |
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union bsca_sigp_ctrl old = *sigp_ctrl; |
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expect = old.value; |
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rc = cmpxchg(&sigp_ctrl->value, old.value, 0); |
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} |
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read_unlock(&vcpu->kvm->arch.sca_lock); |
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WARN_ON(rc != expect); /* cannot clear? */ |
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} |
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int psw_extint_disabled(struct kvm_vcpu *vcpu) |
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{ |
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return !(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_EXT); |
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} |
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static int psw_ioint_disabled(struct kvm_vcpu *vcpu) |
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{ |
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return !(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_IO); |
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} |
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static int psw_mchk_disabled(struct kvm_vcpu *vcpu) |
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{ |
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return !(vcpu->arch.sie_block->gpsw.mask & PSW_MASK_MCHECK); |
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} |
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static int psw_interrupts_disabled(struct kvm_vcpu *vcpu) |
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{ |
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return psw_extint_disabled(vcpu) && |
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psw_ioint_disabled(vcpu) && |
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psw_mchk_disabled(vcpu); |
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} |
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static int ckc_interrupts_enabled(struct kvm_vcpu *vcpu) |
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{ |
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if (psw_extint_disabled(vcpu) || |
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!(vcpu->arch.sie_block->gcr[0] & CR0_CLOCK_COMPARATOR_SUBMASK)) |
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return 0; |
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if (guestdbg_enabled(vcpu) && guestdbg_sstep_enabled(vcpu)) |
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/* No timer interrupts when single stepping */ |
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return 0; |
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return 1; |
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} |
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static int ckc_irq_pending(struct kvm_vcpu *vcpu) |
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{ |
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const u64 now = kvm_s390_get_tod_clock_fast(vcpu->kvm); |
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const u64 ckc = vcpu->arch.sie_block->ckc; |
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if (vcpu->arch.sie_block->gcr[0] & CR0_CLOCK_COMPARATOR_SIGN) { |
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if ((s64)ckc >= (s64)now) |
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return 0; |
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} else if (ckc >= now) { |
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return 0; |
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} |
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return ckc_interrupts_enabled(vcpu); |
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} |
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static int cpu_timer_interrupts_enabled(struct kvm_vcpu *vcpu) |
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{ |
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return !psw_extint_disabled(vcpu) && |
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(vcpu->arch.sie_block->gcr[0] & CR0_CPU_TIMER_SUBMASK); |
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} |
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static int cpu_timer_irq_pending(struct kvm_vcpu *vcpu) |
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{ |
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if (!cpu_timer_interrupts_enabled(vcpu)) |
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return 0; |
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return kvm_s390_get_cpu_timer(vcpu) >> 63; |
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} |
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static uint64_t isc_to_isc_bits(int isc) |
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{ |
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return (0x80 >> isc) << 24; |
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} |
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static inline u32 isc_to_int_word(u8 isc) |
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{ |
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return ((u32)isc << 27) | 0x80000000; |
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} |
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static inline u8 int_word_to_isc(u32 int_word) |
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{ |
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return (int_word & 0x38000000) >> 27; |
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} |
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/* |
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* To use atomic bitmap functions, we have to provide a bitmap address |
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* that is u64 aligned. However, the ipm might be u32 aligned. |
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* Therefore, we logically start the bitmap at the very beginning of the |
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* struct and fixup the bit number. |
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*/ |
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#define IPM_BIT_OFFSET (offsetof(struct kvm_s390_gisa, ipm) * BITS_PER_BYTE) |
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/** |
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* gisa_set_iam - change the GISA interruption alert mask |
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* |
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* @gisa: gisa to operate on |
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* @iam: new IAM value to use |
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* |
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* Change the IAM atomically with the next alert address and the IPM |
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* of the GISA if the GISA is not part of the GIB alert list. All three |
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* fields are located in the first long word of the GISA. |
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* |
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* Returns: 0 on success |
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* -EBUSY in case the gisa is part of the alert list |
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*/ |
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static inline int gisa_set_iam(struct kvm_s390_gisa *gisa, u8 iam) |
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{ |
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u64 word, _word; |
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do { |
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word = READ_ONCE(gisa->u64.word[0]); |
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if ((u64)gisa != word >> 32) |
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return -EBUSY; |
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_word = (word & ~0xffUL) | iam; |
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} while (cmpxchg(&gisa->u64.word[0], word, _word) != word); |
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return 0; |
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} |
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/** |
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* gisa_clear_ipm - clear the GISA interruption pending mask |
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* |
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* @gisa: gisa to operate on |
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* |
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* Clear the IPM atomically with the next alert address and the IAM |
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* of the GISA unconditionally. All three fields are located in the |
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* first long word of the GISA. |
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*/ |
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static inline void gisa_clear_ipm(struct kvm_s390_gisa *gisa) |
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{ |
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u64 word, _word; |
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do { |
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word = READ_ONCE(gisa->u64.word[0]); |
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_word = word & ~(0xffUL << 24); |
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} while (cmpxchg(&gisa->u64.word[0], word, _word) != word); |
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} |
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/** |
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* gisa_get_ipm_or_restore_iam - return IPM or restore GISA IAM |
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* |
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* @gi: gisa interrupt struct to work on |
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* |
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* Atomically restores the interruption alert mask if none of the |
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* relevant ISCs are pending and return the IPM. |
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* |
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* Returns: the relevant pending ISCs |
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*/ |
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static inline u8 gisa_get_ipm_or_restore_iam(struct kvm_s390_gisa_interrupt *gi) |
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{ |
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u8 pending_mask, alert_mask; |
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u64 word, _word; |
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do { |
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word = READ_ONCE(gi->origin->u64.word[0]); |
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alert_mask = READ_ONCE(gi->alert.mask); |
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pending_mask = (u8)(word >> 24) & alert_mask; |
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if (pending_mask) |
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return pending_mask; |
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_word = (word & ~0xffUL) | alert_mask; |
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} while (cmpxchg(&gi->origin->u64.word[0], word, _word) != word); |
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return 0; |
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} |
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static inline int gisa_in_alert_list(struct kvm_s390_gisa *gisa) |
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{ |
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return READ_ONCE(gisa->next_alert) != (u32)(u64)gisa; |
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} |
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static inline void gisa_set_ipm_gisc(struct kvm_s390_gisa *gisa, u32 gisc) |
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{ |
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set_bit_inv(IPM_BIT_OFFSET + gisc, (unsigned long *) gisa); |
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} |
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static inline u8 gisa_get_ipm(struct kvm_s390_gisa *gisa) |
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{ |
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return READ_ONCE(gisa->ipm); |
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} |
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static inline void gisa_clear_ipm_gisc(struct kvm_s390_gisa *gisa, u32 gisc) |
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{ |
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clear_bit_inv(IPM_BIT_OFFSET + gisc, (unsigned long *) gisa); |
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} |
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static inline int gisa_tac_ipm_gisc(struct kvm_s390_gisa *gisa, u32 gisc) |
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{ |
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return test_and_clear_bit_inv(IPM_BIT_OFFSET + gisc, (unsigned long *) gisa); |
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} |
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static inline unsigned long pending_irqs_no_gisa(struct kvm_vcpu *vcpu) |
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{ |
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unsigned long pending = vcpu->kvm->arch.float_int.pending_irqs | |
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vcpu->arch.local_int.pending_irqs; |
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pending &= ~vcpu->kvm->arch.float_int.masked_irqs; |
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return pending; |
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} |
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static inline unsigned long pending_irqs(struct kvm_vcpu *vcpu) |
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{ |
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struct kvm_s390_gisa_interrupt *gi = &vcpu->kvm->arch.gisa_int; |
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unsigned long pending_mask; |
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pending_mask = pending_irqs_no_gisa(vcpu); |
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if (gi->origin) |
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pending_mask |= gisa_get_ipm(gi->origin) << IRQ_PEND_IO_ISC_7; |
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return pending_mask; |
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} |
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static inline int isc_to_irq_type(unsigned long isc) |
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{ |
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return IRQ_PEND_IO_ISC_0 - isc; |
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} |
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static inline int irq_type_to_isc(unsigned long irq_type) |
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{ |
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return IRQ_PEND_IO_ISC_0 - irq_type; |
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} |
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static unsigned long disable_iscs(struct kvm_vcpu *vcpu, |
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unsigned long active_mask) |
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{ |
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int i; |
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for (i = 0; i <= MAX_ISC; i++) |
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if (!(vcpu->arch.sie_block->gcr[6] & isc_to_isc_bits(i))) |
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active_mask &= ~(1UL << (isc_to_irq_type(i))); |
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return active_mask; |
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} |
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static unsigned long deliverable_irqs(struct kvm_vcpu *vcpu) |
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{ |
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unsigned long active_mask; |
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active_mask = pending_irqs(vcpu); |
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if (!active_mask) |
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return 0; |
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if (psw_extint_disabled(vcpu)) |
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active_mask &= ~IRQ_PEND_EXT_MASK; |
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if (psw_ioint_disabled(vcpu)) |
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active_mask &= ~IRQ_PEND_IO_MASK; |
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else |
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active_mask = disable_iscs(vcpu, active_mask); |
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if (!(vcpu->arch.sie_block->gcr[0] & CR0_EXTERNAL_CALL_SUBMASK)) |
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__clear_bit(IRQ_PEND_EXT_EXTERNAL, &active_mask); |
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if (!(vcpu->arch.sie_block->gcr[0] & CR0_EMERGENCY_SIGNAL_SUBMASK)) |
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__clear_bit(IRQ_PEND_EXT_EMERGENCY, &active_mask); |
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if (!(vcpu->arch.sie_block->gcr[0] & CR0_CLOCK_COMPARATOR_SUBMASK)) |
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__clear_bit(IRQ_PEND_EXT_CLOCK_COMP, &active_mask); |
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if (!(vcpu->arch.sie_block->gcr[0] & CR0_CPU_TIMER_SUBMASK)) |
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__clear_bit(IRQ_PEND_EXT_CPU_TIMER, &active_mask); |
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if (!(vcpu->arch.sie_block->gcr[0] & CR0_SERVICE_SIGNAL_SUBMASK)) { |
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__clear_bit(IRQ_PEND_EXT_SERVICE, &active_mask); |
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__clear_bit(IRQ_PEND_EXT_SERVICE_EV, &active_mask); |
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} |
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if (psw_mchk_disabled(vcpu)) |
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active_mask &= ~IRQ_PEND_MCHK_MASK; |
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/* PV guest cpus can have a single interruption injected at a time. */ |
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if (kvm_s390_pv_cpu_get_handle(vcpu) && |
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vcpu->arch.sie_block->iictl != IICTL_CODE_NONE) |
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active_mask &= ~(IRQ_PEND_EXT_II_MASK | |
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IRQ_PEND_IO_MASK | |
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IRQ_PEND_MCHK_MASK); |
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/* |
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* Check both floating and local interrupt's cr14 because |
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* bit IRQ_PEND_MCHK_REP could be set in both cases. |
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*/ |
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if (!(vcpu->arch.sie_block->gcr[14] & |
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(vcpu->kvm->arch.float_int.mchk.cr14 | |
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vcpu->arch.local_int.irq.mchk.cr14))) |
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__clear_bit(IRQ_PEND_MCHK_REP, &active_mask); |
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/* |
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* STOP irqs will never be actively delivered. They are triggered via |
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* intercept requests and cleared when the stop intercept is performed. |
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*/ |
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__clear_bit(IRQ_PEND_SIGP_STOP, &active_mask); |
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return active_mask; |
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} |
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static void __set_cpu_idle(struct kvm_vcpu *vcpu) |
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{ |
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kvm_s390_set_cpuflags(vcpu, CPUSTAT_WAIT); |
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set_bit(vcpu->vcpu_id, vcpu->kvm->arch.idle_mask); |
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} |
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static void __unset_cpu_idle(struct kvm_vcpu *vcpu) |
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{ |
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kvm_s390_clear_cpuflags(vcpu, CPUSTAT_WAIT); |
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clear_bit(vcpu->vcpu_id, vcpu->kvm->arch.idle_mask); |
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} |
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static void __reset_intercept_indicators(struct kvm_vcpu *vcpu) |
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{ |
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kvm_s390_clear_cpuflags(vcpu, CPUSTAT_IO_INT | CPUSTAT_EXT_INT | |
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CPUSTAT_STOP_INT); |
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vcpu->arch.sie_block->lctl = 0x0000; |
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vcpu->arch.sie_block->ictl &= ~(ICTL_LPSW | ICTL_STCTL | ICTL_PINT); |
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|
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if (guestdbg_enabled(vcpu)) { |
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vcpu->arch.sie_block->lctl |= (LCTL_CR0 | LCTL_CR9 | |
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LCTL_CR10 | LCTL_CR11); |
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vcpu->arch.sie_block->ictl |= (ICTL_STCTL | ICTL_PINT); |
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} |
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} |
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static void set_intercept_indicators_io(struct kvm_vcpu *vcpu) |
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{ |
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if (!(pending_irqs_no_gisa(vcpu) & IRQ_PEND_IO_MASK)) |
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return; |
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if (psw_ioint_disabled(vcpu)) |
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kvm_s390_set_cpuflags(vcpu, CPUSTAT_IO_INT); |
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else |
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vcpu->arch.sie_block->lctl |= LCTL_CR6; |
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} |
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static void set_intercept_indicators_ext(struct kvm_vcpu *vcpu) |
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{ |
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if (!(pending_irqs_no_gisa(vcpu) & IRQ_PEND_EXT_MASK)) |
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return; |
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if (psw_extint_disabled(vcpu)) |
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kvm_s390_set_cpuflags(vcpu, CPUSTAT_EXT_INT); |
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else |
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vcpu->arch.sie_block->lctl |= LCTL_CR0; |
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} |
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static void set_intercept_indicators_mchk(struct kvm_vcpu *vcpu) |
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{ |
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if (!(pending_irqs_no_gisa(vcpu) & IRQ_PEND_MCHK_MASK)) |
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return; |
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if (psw_mchk_disabled(vcpu)) |
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vcpu->arch.sie_block->ictl |= ICTL_LPSW; |
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else |
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vcpu->arch.sie_block->lctl |= LCTL_CR14; |
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} |
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static void set_intercept_indicators_stop(struct kvm_vcpu *vcpu) |
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{ |
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if (kvm_s390_is_stop_irq_pending(vcpu)) |
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kvm_s390_set_cpuflags(vcpu, CPUSTAT_STOP_INT); |
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} |
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|
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/* Set interception request for non-deliverable interrupts */ |
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static void set_intercept_indicators(struct kvm_vcpu *vcpu) |
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{ |
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set_intercept_indicators_io(vcpu); |
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set_intercept_indicators_ext(vcpu); |
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set_intercept_indicators_mchk(vcpu); |
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set_intercept_indicators_stop(vcpu); |
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} |
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|
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static int __must_check __deliver_cpu_timer(struct kvm_vcpu *vcpu) |
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{ |
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struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
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int rc = 0; |
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|
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vcpu->stat.deliver_cputm++; |
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trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_INT_CPU_TIMER, |
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0, 0); |
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if (kvm_s390_pv_cpu_is_protected(vcpu)) { |
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vcpu->arch.sie_block->iictl = IICTL_CODE_EXT; |
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vcpu->arch.sie_block->eic = EXT_IRQ_CPU_TIMER; |
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} else { |
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rc = put_guest_lc(vcpu, EXT_IRQ_CPU_TIMER, |
|
(u16 *)__LC_EXT_INT_CODE); |
|
rc |= put_guest_lc(vcpu, 0, (u16 *)__LC_EXT_CPU_ADDR); |
|
rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW, |
|
&vcpu->arch.sie_block->gpsw, sizeof(psw_t)); |
|
rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW, |
|
&vcpu->arch.sie_block->gpsw, sizeof(psw_t)); |
|
} |
|
clear_bit(IRQ_PEND_EXT_CPU_TIMER, &li->pending_irqs); |
|
return rc ? -EFAULT : 0; |
|
} |
|
|
|
static int __must_check __deliver_ckc(struct kvm_vcpu *vcpu) |
|
{ |
|
struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
|
int rc = 0; |
|
|
|
vcpu->stat.deliver_ckc++; |
|
trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_INT_CLOCK_COMP, |
|
0, 0); |
|
if (kvm_s390_pv_cpu_is_protected(vcpu)) { |
|
vcpu->arch.sie_block->iictl = IICTL_CODE_EXT; |
|
vcpu->arch.sie_block->eic = EXT_IRQ_CLK_COMP; |
|
} else { |
|
rc = put_guest_lc(vcpu, EXT_IRQ_CLK_COMP, |
|
(u16 __user *)__LC_EXT_INT_CODE); |
|
rc |= put_guest_lc(vcpu, 0, (u16 *)__LC_EXT_CPU_ADDR); |
|
rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW, |
|
&vcpu->arch.sie_block->gpsw, sizeof(psw_t)); |
|
rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW, |
|
&vcpu->arch.sie_block->gpsw, sizeof(psw_t)); |
|
} |
|
clear_bit(IRQ_PEND_EXT_CLOCK_COMP, &li->pending_irqs); |
|
return rc ? -EFAULT : 0; |
|
} |
|
|
|
static int __must_check __deliver_pfault_init(struct kvm_vcpu *vcpu) |
|
{ |
|
struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
|
struct kvm_s390_ext_info ext; |
|
int rc; |
|
|
|
spin_lock(&li->lock); |
|
ext = li->irq.ext; |
|
clear_bit(IRQ_PEND_PFAULT_INIT, &li->pending_irqs); |
|
li->irq.ext.ext_params2 = 0; |
|
spin_unlock(&li->lock); |
|
|
|
VCPU_EVENT(vcpu, 4, "deliver: pfault init token 0x%llx", |
|
ext.ext_params2); |
|
trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, |
|
KVM_S390_INT_PFAULT_INIT, |
|
0, ext.ext_params2); |
|
|
|
rc = put_guest_lc(vcpu, EXT_IRQ_CP_SERVICE, (u16 *) __LC_EXT_INT_CODE); |
|
rc |= put_guest_lc(vcpu, PFAULT_INIT, (u16 *) __LC_EXT_CPU_ADDR); |
|
rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW, |
|
&vcpu->arch.sie_block->gpsw, sizeof(psw_t)); |
|
rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW, |
|
&vcpu->arch.sie_block->gpsw, sizeof(psw_t)); |
|
rc |= put_guest_lc(vcpu, ext.ext_params2, (u64 *) __LC_EXT_PARAMS2); |
|
return rc ? -EFAULT : 0; |
|
} |
|
|
|
static int __write_machine_check(struct kvm_vcpu *vcpu, |
|
struct kvm_s390_mchk_info *mchk) |
|
{ |
|
unsigned long ext_sa_addr; |
|
unsigned long lc; |
|
freg_t fprs[NUM_FPRS]; |
|
union mci mci; |
|
int rc; |
|
|
|
/* |
|
* All other possible payload for a machine check (e.g. the register |
|
* contents in the save area) will be handled by the ultravisor, as |
|
* the hypervisor does not not have the needed information for |
|
* protected guests. |
|
*/ |
|
if (kvm_s390_pv_cpu_is_protected(vcpu)) { |
|
vcpu->arch.sie_block->iictl = IICTL_CODE_MCHK; |
|
vcpu->arch.sie_block->mcic = mchk->mcic; |
|
vcpu->arch.sie_block->faddr = mchk->failing_storage_address; |
|
vcpu->arch.sie_block->edc = mchk->ext_damage_code; |
|
return 0; |
|
} |
|
|
|
mci.val = mchk->mcic; |
|
/* take care of lazy register loading */ |
|
save_fpu_regs(); |
|
save_access_regs(vcpu->run->s.regs.acrs); |
|
if (MACHINE_HAS_GS && vcpu->arch.gs_enabled) |
|
save_gs_cb(current->thread.gs_cb); |
|
|
|
/* Extended save area */ |
|
rc = read_guest_lc(vcpu, __LC_MCESAD, &ext_sa_addr, |
|
sizeof(unsigned long)); |
|
/* Only bits 0 through 63-LC are used for address formation */ |
|
lc = ext_sa_addr & MCESA_LC_MASK; |
|
if (test_kvm_facility(vcpu->kvm, 133)) { |
|
switch (lc) { |
|
case 0: |
|
case 10: |
|
ext_sa_addr &= ~0x3ffUL; |
|
break; |
|
case 11: |
|
ext_sa_addr &= ~0x7ffUL; |
|
break; |
|
case 12: |
|
ext_sa_addr &= ~0xfffUL; |
|
break; |
|
default: |
|
ext_sa_addr = 0; |
|
break; |
|
} |
|
} else { |
|
ext_sa_addr &= ~0x3ffUL; |
|
} |
|
|
|
if (!rc && mci.vr && ext_sa_addr && test_kvm_facility(vcpu->kvm, 129)) { |
|
if (write_guest_abs(vcpu, ext_sa_addr, vcpu->run->s.regs.vrs, |
|
512)) |
|
mci.vr = 0; |
|
} else { |
|
mci.vr = 0; |
|
} |
|
if (!rc && mci.gs && ext_sa_addr && test_kvm_facility(vcpu->kvm, 133) |
|
&& (lc == 11 || lc == 12)) { |
|
if (write_guest_abs(vcpu, ext_sa_addr + 1024, |
|
&vcpu->run->s.regs.gscb, 32)) |
|
mci.gs = 0; |
|
} else { |
|
mci.gs = 0; |
|
} |
|
|
|
/* General interruption information */ |
|
rc |= put_guest_lc(vcpu, 1, (u8 __user *) __LC_AR_MODE_ID); |
|
rc |= write_guest_lc(vcpu, __LC_MCK_OLD_PSW, |
|
&vcpu->arch.sie_block->gpsw, sizeof(psw_t)); |
|
rc |= read_guest_lc(vcpu, __LC_MCK_NEW_PSW, |
|
&vcpu->arch.sie_block->gpsw, sizeof(psw_t)); |
|
rc |= put_guest_lc(vcpu, mci.val, (u64 __user *) __LC_MCCK_CODE); |
|
|
|
/* Register-save areas */ |
|
if (MACHINE_HAS_VX) { |
|
convert_vx_to_fp(fprs, (__vector128 *) vcpu->run->s.regs.vrs); |
|
rc |= write_guest_lc(vcpu, __LC_FPREGS_SAVE_AREA, fprs, 128); |
|
} else { |
|
rc |= write_guest_lc(vcpu, __LC_FPREGS_SAVE_AREA, |
|
vcpu->run->s.regs.fprs, 128); |
|
} |
|
rc |= write_guest_lc(vcpu, __LC_GPREGS_SAVE_AREA, |
|
vcpu->run->s.regs.gprs, 128); |
|
rc |= put_guest_lc(vcpu, current->thread.fpu.fpc, |
|
(u32 __user *) __LC_FP_CREG_SAVE_AREA); |
|
rc |= put_guest_lc(vcpu, vcpu->arch.sie_block->todpr, |
|
(u32 __user *) __LC_TOD_PROGREG_SAVE_AREA); |
|
rc |= put_guest_lc(vcpu, kvm_s390_get_cpu_timer(vcpu), |
|
(u64 __user *) __LC_CPU_TIMER_SAVE_AREA); |
|
rc |= put_guest_lc(vcpu, vcpu->arch.sie_block->ckc >> 8, |
|
(u64 __user *) __LC_CLOCK_COMP_SAVE_AREA); |
|
rc |= write_guest_lc(vcpu, __LC_AREGS_SAVE_AREA, |
|
&vcpu->run->s.regs.acrs, 64); |
|
rc |= write_guest_lc(vcpu, __LC_CREGS_SAVE_AREA, |
|
&vcpu->arch.sie_block->gcr, 128); |
|
|
|
/* Extended interruption information */ |
|
rc |= put_guest_lc(vcpu, mchk->ext_damage_code, |
|
(u32 __user *) __LC_EXT_DAMAGE_CODE); |
|
rc |= put_guest_lc(vcpu, mchk->failing_storage_address, |
|
(u64 __user *) __LC_MCCK_FAIL_STOR_ADDR); |
|
rc |= write_guest_lc(vcpu, __LC_PSW_SAVE_AREA, &mchk->fixed_logout, |
|
sizeof(mchk->fixed_logout)); |
|
return rc ? -EFAULT : 0; |
|
} |
|
|
|
static int __must_check __deliver_machine_check(struct kvm_vcpu *vcpu) |
|
{ |
|
struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int; |
|
struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
|
struct kvm_s390_mchk_info mchk = {}; |
|
int deliver = 0; |
|
int rc = 0; |
|
|
|
spin_lock(&fi->lock); |
|
spin_lock(&li->lock); |
|
if (test_bit(IRQ_PEND_MCHK_EX, &li->pending_irqs) || |
|
test_bit(IRQ_PEND_MCHK_REP, &li->pending_irqs)) { |
|
/* |
|
* If there was an exigent machine check pending, then any |
|
* repressible machine checks that might have been pending |
|
* are indicated along with it, so always clear bits for |
|
* repressible and exigent interrupts |
|
*/ |
|
mchk = li->irq.mchk; |
|
clear_bit(IRQ_PEND_MCHK_EX, &li->pending_irqs); |
|
clear_bit(IRQ_PEND_MCHK_REP, &li->pending_irqs); |
|
memset(&li->irq.mchk, 0, sizeof(mchk)); |
|
deliver = 1; |
|
} |
|
/* |
|
* We indicate floating repressible conditions along with |
|
* other pending conditions. Channel Report Pending and Channel |
|
* Subsystem damage are the only two and and are indicated by |
|
* bits in mcic and masked in cr14. |
|
*/ |
|
if (test_and_clear_bit(IRQ_PEND_MCHK_REP, &fi->pending_irqs)) { |
|
mchk.mcic |= fi->mchk.mcic; |
|
mchk.cr14 |= fi->mchk.cr14; |
|
memset(&fi->mchk, 0, sizeof(mchk)); |
|
deliver = 1; |
|
} |
|
spin_unlock(&li->lock); |
|
spin_unlock(&fi->lock); |
|
|
|
if (deliver) { |
|
VCPU_EVENT(vcpu, 3, "deliver: machine check mcic 0x%llx", |
|
mchk.mcic); |
|
trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, |
|
KVM_S390_MCHK, |
|
mchk.cr14, mchk.mcic); |
|
vcpu->stat.deliver_machine_check++; |
|
rc = __write_machine_check(vcpu, &mchk); |
|
} |
|
return rc; |
|
} |
|
|
|
static int __must_check __deliver_restart(struct kvm_vcpu *vcpu) |
|
{ |
|
struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
|
int rc = 0; |
|
|
|
VCPU_EVENT(vcpu, 3, "%s", "deliver: cpu restart"); |
|
vcpu->stat.deliver_restart_signal++; |
|
trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_RESTART, 0, 0); |
|
|
|
if (kvm_s390_pv_cpu_is_protected(vcpu)) { |
|
vcpu->arch.sie_block->iictl = IICTL_CODE_RESTART; |
|
} else { |
|
rc = write_guest_lc(vcpu, |
|
offsetof(struct lowcore, restart_old_psw), |
|
&vcpu->arch.sie_block->gpsw, sizeof(psw_t)); |
|
rc |= read_guest_lc(vcpu, offsetof(struct lowcore, restart_psw), |
|
&vcpu->arch.sie_block->gpsw, sizeof(psw_t)); |
|
} |
|
clear_bit(IRQ_PEND_RESTART, &li->pending_irqs); |
|
return rc ? -EFAULT : 0; |
|
} |
|
|
|
static int __must_check __deliver_set_prefix(struct kvm_vcpu *vcpu) |
|
{ |
|
struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
|
struct kvm_s390_prefix_info prefix; |
|
|
|
spin_lock(&li->lock); |
|
prefix = li->irq.prefix; |
|
li->irq.prefix.address = 0; |
|
clear_bit(IRQ_PEND_SET_PREFIX, &li->pending_irqs); |
|
spin_unlock(&li->lock); |
|
|
|
vcpu->stat.deliver_prefix_signal++; |
|
trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, |
|
KVM_S390_SIGP_SET_PREFIX, |
|
prefix.address, 0); |
|
|
|
kvm_s390_set_prefix(vcpu, prefix.address); |
|
return 0; |
|
} |
|
|
|
static int __must_check __deliver_emergency_signal(struct kvm_vcpu *vcpu) |
|
{ |
|
struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
|
int rc; |
|
int cpu_addr; |
|
|
|
spin_lock(&li->lock); |
|
cpu_addr = find_first_bit(li->sigp_emerg_pending, KVM_MAX_VCPUS); |
|
clear_bit(cpu_addr, li->sigp_emerg_pending); |
|
if (bitmap_empty(li->sigp_emerg_pending, KVM_MAX_VCPUS)) |
|
clear_bit(IRQ_PEND_EXT_EMERGENCY, &li->pending_irqs); |
|
spin_unlock(&li->lock); |
|
|
|
VCPU_EVENT(vcpu, 4, "%s", "deliver: sigp emerg"); |
|
vcpu->stat.deliver_emergency_signal++; |
|
trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_INT_EMERGENCY, |
|
cpu_addr, 0); |
|
if (kvm_s390_pv_cpu_is_protected(vcpu)) { |
|
vcpu->arch.sie_block->iictl = IICTL_CODE_EXT; |
|
vcpu->arch.sie_block->eic = EXT_IRQ_EMERGENCY_SIG; |
|
vcpu->arch.sie_block->extcpuaddr = cpu_addr; |
|
return 0; |
|
} |
|
|
|
rc = put_guest_lc(vcpu, EXT_IRQ_EMERGENCY_SIG, |
|
(u16 *)__LC_EXT_INT_CODE); |
|
rc |= put_guest_lc(vcpu, cpu_addr, (u16 *)__LC_EXT_CPU_ADDR); |
|
rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW, |
|
&vcpu->arch.sie_block->gpsw, sizeof(psw_t)); |
|
rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW, |
|
&vcpu->arch.sie_block->gpsw, sizeof(psw_t)); |
|
return rc ? -EFAULT : 0; |
|
} |
|
|
|
static int __must_check __deliver_external_call(struct kvm_vcpu *vcpu) |
|
{ |
|
struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
|
struct kvm_s390_extcall_info extcall; |
|
int rc; |
|
|
|
spin_lock(&li->lock); |
|
extcall = li->irq.extcall; |
|
li->irq.extcall.code = 0; |
|
clear_bit(IRQ_PEND_EXT_EXTERNAL, &li->pending_irqs); |
|
spin_unlock(&li->lock); |
|
|
|
VCPU_EVENT(vcpu, 4, "%s", "deliver: sigp ext call"); |
|
vcpu->stat.deliver_external_call++; |
|
trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, |
|
KVM_S390_INT_EXTERNAL_CALL, |
|
extcall.code, 0); |
|
if (kvm_s390_pv_cpu_is_protected(vcpu)) { |
|
vcpu->arch.sie_block->iictl = IICTL_CODE_EXT; |
|
vcpu->arch.sie_block->eic = EXT_IRQ_EXTERNAL_CALL; |
|
vcpu->arch.sie_block->extcpuaddr = extcall.code; |
|
return 0; |
|
} |
|
|
|
rc = put_guest_lc(vcpu, EXT_IRQ_EXTERNAL_CALL, |
|
(u16 *)__LC_EXT_INT_CODE); |
|
rc |= put_guest_lc(vcpu, extcall.code, (u16 *)__LC_EXT_CPU_ADDR); |
|
rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW, |
|
&vcpu->arch.sie_block->gpsw, sizeof(psw_t)); |
|
rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW, &vcpu->arch.sie_block->gpsw, |
|
sizeof(psw_t)); |
|
return rc ? -EFAULT : 0; |
|
} |
|
|
|
static int __deliver_prog_pv(struct kvm_vcpu *vcpu, u16 code) |
|
{ |
|
switch (code) { |
|
case PGM_SPECIFICATION: |
|
vcpu->arch.sie_block->iictl = IICTL_CODE_SPECIFICATION; |
|
break; |
|
case PGM_OPERAND: |
|
vcpu->arch.sie_block->iictl = IICTL_CODE_OPERAND; |
|
break; |
|
default: |
|
return -EINVAL; |
|
} |
|
return 0; |
|
} |
|
|
|
static int __must_check __deliver_prog(struct kvm_vcpu *vcpu) |
|
{ |
|
struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
|
struct kvm_s390_pgm_info pgm_info; |
|
int rc = 0, nullifying = false; |
|
u16 ilen; |
|
|
|
spin_lock(&li->lock); |
|
pgm_info = li->irq.pgm; |
|
clear_bit(IRQ_PEND_PROG, &li->pending_irqs); |
|
memset(&li->irq.pgm, 0, sizeof(pgm_info)); |
|
spin_unlock(&li->lock); |
|
|
|
ilen = pgm_info.flags & KVM_S390_PGM_FLAGS_ILC_MASK; |
|
VCPU_EVENT(vcpu, 3, "deliver: program irq code 0x%x, ilen:%d", |
|
pgm_info.code, ilen); |
|
vcpu->stat.deliver_program++; |
|
trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_PROGRAM_INT, |
|
pgm_info.code, 0); |
|
|
|
/* PER is handled by the ultravisor */ |
|
if (kvm_s390_pv_cpu_is_protected(vcpu)) |
|
return __deliver_prog_pv(vcpu, pgm_info.code & ~PGM_PER); |
|
|
|
switch (pgm_info.code & ~PGM_PER) { |
|
case PGM_AFX_TRANSLATION: |
|
case PGM_ASX_TRANSLATION: |
|
case PGM_EX_TRANSLATION: |
|
case PGM_LFX_TRANSLATION: |
|
case PGM_LSTE_SEQUENCE: |
|
case PGM_LSX_TRANSLATION: |
|
case PGM_LX_TRANSLATION: |
|
case PGM_PRIMARY_AUTHORITY: |
|
case PGM_SECONDARY_AUTHORITY: |
|
nullifying = true; |
|
fallthrough; |
|
case PGM_SPACE_SWITCH: |
|
rc = put_guest_lc(vcpu, pgm_info.trans_exc_code, |
|
(u64 *)__LC_TRANS_EXC_CODE); |
|
break; |
|
case PGM_ALEN_TRANSLATION: |
|
case PGM_ALE_SEQUENCE: |
|
case PGM_ASTE_INSTANCE: |
|
case PGM_ASTE_SEQUENCE: |
|
case PGM_ASTE_VALIDITY: |
|
case PGM_EXTENDED_AUTHORITY: |
|
rc = put_guest_lc(vcpu, pgm_info.exc_access_id, |
|
(u8 *)__LC_EXC_ACCESS_ID); |
|
nullifying = true; |
|
break; |
|
case PGM_ASCE_TYPE: |
|
case PGM_PAGE_TRANSLATION: |
|
case PGM_REGION_FIRST_TRANS: |
|
case PGM_REGION_SECOND_TRANS: |
|
case PGM_REGION_THIRD_TRANS: |
|
case PGM_SEGMENT_TRANSLATION: |
|
rc = put_guest_lc(vcpu, pgm_info.trans_exc_code, |
|
(u64 *)__LC_TRANS_EXC_CODE); |
|
rc |= put_guest_lc(vcpu, pgm_info.exc_access_id, |
|
(u8 *)__LC_EXC_ACCESS_ID); |
|
rc |= put_guest_lc(vcpu, pgm_info.op_access_id, |
|
(u8 *)__LC_OP_ACCESS_ID); |
|
nullifying = true; |
|
break; |
|
case PGM_MONITOR: |
|
rc = put_guest_lc(vcpu, pgm_info.mon_class_nr, |
|
(u16 *)__LC_MON_CLASS_NR); |
|
rc |= put_guest_lc(vcpu, pgm_info.mon_code, |
|
(u64 *)__LC_MON_CODE); |
|
break; |
|
case PGM_VECTOR_PROCESSING: |
|
case PGM_DATA: |
|
rc = put_guest_lc(vcpu, pgm_info.data_exc_code, |
|
(u32 *)__LC_DATA_EXC_CODE); |
|
break; |
|
case PGM_PROTECTION: |
|
rc = put_guest_lc(vcpu, pgm_info.trans_exc_code, |
|
(u64 *)__LC_TRANS_EXC_CODE); |
|
rc |= put_guest_lc(vcpu, pgm_info.exc_access_id, |
|
(u8 *)__LC_EXC_ACCESS_ID); |
|
break; |
|
case PGM_STACK_FULL: |
|
case PGM_STACK_EMPTY: |
|
case PGM_STACK_SPECIFICATION: |
|
case PGM_STACK_TYPE: |
|
case PGM_STACK_OPERATION: |
|
case PGM_TRACE_TABEL: |
|
case PGM_CRYPTO_OPERATION: |
|
nullifying = true; |
|
break; |
|
} |
|
|
|
if (pgm_info.code & PGM_PER) { |
|
rc |= put_guest_lc(vcpu, pgm_info.per_code, |
|
(u8 *) __LC_PER_CODE); |
|
rc |= put_guest_lc(vcpu, pgm_info.per_atmid, |
|
(u8 *)__LC_PER_ATMID); |
|
rc |= put_guest_lc(vcpu, pgm_info.per_address, |
|
(u64 *) __LC_PER_ADDRESS); |
|
rc |= put_guest_lc(vcpu, pgm_info.per_access_id, |
|
(u8 *) __LC_PER_ACCESS_ID); |
|
} |
|
|
|
if (nullifying && !(pgm_info.flags & KVM_S390_PGM_FLAGS_NO_REWIND)) |
|
kvm_s390_rewind_psw(vcpu, ilen); |
|
|
|
/* bit 1+2 of the target are the ilc, so we can directly use ilen */ |
|
rc |= put_guest_lc(vcpu, ilen, (u16 *) __LC_PGM_ILC); |
|
rc |= put_guest_lc(vcpu, vcpu->arch.sie_block->gbea, |
|
(u64 *) __LC_LAST_BREAK); |
|
rc |= put_guest_lc(vcpu, pgm_info.code, |
|
(u16 *)__LC_PGM_INT_CODE); |
|
rc |= write_guest_lc(vcpu, __LC_PGM_OLD_PSW, |
|
&vcpu->arch.sie_block->gpsw, sizeof(psw_t)); |
|
rc |= read_guest_lc(vcpu, __LC_PGM_NEW_PSW, |
|
&vcpu->arch.sie_block->gpsw, sizeof(psw_t)); |
|
return rc ? -EFAULT : 0; |
|
} |
|
|
|
#define SCCB_MASK 0xFFFFFFF8 |
|
#define SCCB_EVENT_PENDING 0x3 |
|
|
|
static int write_sclp(struct kvm_vcpu *vcpu, u32 parm) |
|
{ |
|
int rc; |
|
|
|
if (kvm_s390_pv_cpu_get_handle(vcpu)) { |
|
vcpu->arch.sie_block->iictl = IICTL_CODE_EXT; |
|
vcpu->arch.sie_block->eic = EXT_IRQ_SERVICE_SIG; |
|
vcpu->arch.sie_block->eiparams = parm; |
|
return 0; |
|
} |
|
|
|
rc = put_guest_lc(vcpu, EXT_IRQ_SERVICE_SIG, (u16 *)__LC_EXT_INT_CODE); |
|
rc |= put_guest_lc(vcpu, 0, (u16 *)__LC_EXT_CPU_ADDR); |
|
rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW, |
|
&vcpu->arch.sie_block->gpsw, sizeof(psw_t)); |
|
rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW, |
|
&vcpu->arch.sie_block->gpsw, sizeof(psw_t)); |
|
rc |= put_guest_lc(vcpu, parm, |
|
(u32 *)__LC_EXT_PARAMS); |
|
|
|
return rc ? -EFAULT : 0; |
|
} |
|
|
|
static int __must_check __deliver_service(struct kvm_vcpu *vcpu) |
|
{ |
|
struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int; |
|
struct kvm_s390_ext_info ext; |
|
|
|
spin_lock(&fi->lock); |
|
if (test_bit(IRQ_PEND_EXT_SERVICE, &fi->masked_irqs) || |
|
!(test_bit(IRQ_PEND_EXT_SERVICE, &fi->pending_irqs))) { |
|
spin_unlock(&fi->lock); |
|
return 0; |
|
} |
|
ext = fi->srv_signal; |
|
memset(&fi->srv_signal, 0, sizeof(ext)); |
|
clear_bit(IRQ_PEND_EXT_SERVICE, &fi->pending_irqs); |
|
clear_bit(IRQ_PEND_EXT_SERVICE_EV, &fi->pending_irqs); |
|
if (kvm_s390_pv_cpu_is_protected(vcpu)) |
|
set_bit(IRQ_PEND_EXT_SERVICE, &fi->masked_irqs); |
|
spin_unlock(&fi->lock); |
|
|
|
VCPU_EVENT(vcpu, 4, "deliver: sclp parameter 0x%x", |
|
ext.ext_params); |
|
vcpu->stat.deliver_service_signal++; |
|
trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_INT_SERVICE, |
|
ext.ext_params, 0); |
|
|
|
return write_sclp(vcpu, ext.ext_params); |
|
} |
|
|
|
static int __must_check __deliver_service_ev(struct kvm_vcpu *vcpu) |
|
{ |
|
struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int; |
|
struct kvm_s390_ext_info ext; |
|
|
|
spin_lock(&fi->lock); |
|
if (!(test_bit(IRQ_PEND_EXT_SERVICE_EV, &fi->pending_irqs))) { |
|
spin_unlock(&fi->lock); |
|
return 0; |
|
} |
|
ext = fi->srv_signal; |
|
/* only clear the event bit */ |
|
fi->srv_signal.ext_params &= ~SCCB_EVENT_PENDING; |
|
clear_bit(IRQ_PEND_EXT_SERVICE_EV, &fi->pending_irqs); |
|
spin_unlock(&fi->lock); |
|
|
|
VCPU_EVENT(vcpu, 4, "%s", "deliver: sclp parameter event"); |
|
vcpu->stat.deliver_service_signal++; |
|
trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, KVM_S390_INT_SERVICE, |
|
ext.ext_params, 0); |
|
|
|
return write_sclp(vcpu, SCCB_EVENT_PENDING); |
|
} |
|
|
|
static int __must_check __deliver_pfault_done(struct kvm_vcpu *vcpu) |
|
{ |
|
struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int; |
|
struct kvm_s390_interrupt_info *inti; |
|
int rc = 0; |
|
|
|
spin_lock(&fi->lock); |
|
inti = list_first_entry_or_null(&fi->lists[FIRQ_LIST_PFAULT], |
|
struct kvm_s390_interrupt_info, |
|
list); |
|
if (inti) { |
|
list_del(&inti->list); |
|
fi->counters[FIRQ_CNTR_PFAULT] -= 1; |
|
} |
|
if (list_empty(&fi->lists[FIRQ_LIST_PFAULT])) |
|
clear_bit(IRQ_PEND_PFAULT_DONE, &fi->pending_irqs); |
|
spin_unlock(&fi->lock); |
|
|
|
if (inti) { |
|
trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, |
|
KVM_S390_INT_PFAULT_DONE, 0, |
|
inti->ext.ext_params2); |
|
VCPU_EVENT(vcpu, 4, "deliver: pfault done token 0x%llx", |
|
inti->ext.ext_params2); |
|
|
|
rc = put_guest_lc(vcpu, EXT_IRQ_CP_SERVICE, |
|
(u16 *)__LC_EXT_INT_CODE); |
|
rc |= put_guest_lc(vcpu, PFAULT_DONE, |
|
(u16 *)__LC_EXT_CPU_ADDR); |
|
rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW, |
|
&vcpu->arch.sie_block->gpsw, |
|
sizeof(psw_t)); |
|
rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW, |
|
&vcpu->arch.sie_block->gpsw, |
|
sizeof(psw_t)); |
|
rc |= put_guest_lc(vcpu, inti->ext.ext_params2, |
|
(u64 *)__LC_EXT_PARAMS2); |
|
kfree(inti); |
|
} |
|
return rc ? -EFAULT : 0; |
|
} |
|
|
|
static int __must_check __deliver_virtio(struct kvm_vcpu *vcpu) |
|
{ |
|
struct kvm_s390_float_interrupt *fi = &vcpu->kvm->arch.float_int; |
|
struct kvm_s390_interrupt_info *inti; |
|
int rc = 0; |
|
|
|
spin_lock(&fi->lock); |
|
inti = list_first_entry_or_null(&fi->lists[FIRQ_LIST_VIRTIO], |
|
struct kvm_s390_interrupt_info, |
|
list); |
|
if (inti) { |
|
VCPU_EVENT(vcpu, 4, |
|
"deliver: virtio parm: 0x%x,parm64: 0x%llx", |
|
inti->ext.ext_params, inti->ext.ext_params2); |
|
vcpu->stat.deliver_virtio++; |
|
trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, |
|
inti->type, |
|
inti->ext.ext_params, |
|
inti->ext.ext_params2); |
|
list_del(&inti->list); |
|
fi->counters[FIRQ_CNTR_VIRTIO] -= 1; |
|
} |
|
if (list_empty(&fi->lists[FIRQ_LIST_VIRTIO])) |
|
clear_bit(IRQ_PEND_VIRTIO, &fi->pending_irqs); |
|
spin_unlock(&fi->lock); |
|
|
|
if (inti) { |
|
rc = put_guest_lc(vcpu, EXT_IRQ_CP_SERVICE, |
|
(u16 *)__LC_EXT_INT_CODE); |
|
rc |= put_guest_lc(vcpu, VIRTIO_PARAM, |
|
(u16 *)__LC_EXT_CPU_ADDR); |
|
rc |= write_guest_lc(vcpu, __LC_EXT_OLD_PSW, |
|
&vcpu->arch.sie_block->gpsw, |
|
sizeof(psw_t)); |
|
rc |= read_guest_lc(vcpu, __LC_EXT_NEW_PSW, |
|
&vcpu->arch.sie_block->gpsw, |
|
sizeof(psw_t)); |
|
rc |= put_guest_lc(vcpu, inti->ext.ext_params, |
|
(u32 *)__LC_EXT_PARAMS); |
|
rc |= put_guest_lc(vcpu, inti->ext.ext_params2, |
|
(u64 *)__LC_EXT_PARAMS2); |
|
kfree(inti); |
|
} |
|
return rc ? -EFAULT : 0; |
|
} |
|
|
|
static int __do_deliver_io(struct kvm_vcpu *vcpu, struct kvm_s390_io_info *io) |
|
{ |
|
int rc; |
|
|
|
if (kvm_s390_pv_cpu_is_protected(vcpu)) { |
|
vcpu->arch.sie_block->iictl = IICTL_CODE_IO; |
|
vcpu->arch.sie_block->subchannel_id = io->subchannel_id; |
|
vcpu->arch.sie_block->subchannel_nr = io->subchannel_nr; |
|
vcpu->arch.sie_block->io_int_parm = io->io_int_parm; |
|
vcpu->arch.sie_block->io_int_word = io->io_int_word; |
|
return 0; |
|
} |
|
|
|
rc = put_guest_lc(vcpu, io->subchannel_id, (u16 *)__LC_SUBCHANNEL_ID); |
|
rc |= put_guest_lc(vcpu, io->subchannel_nr, (u16 *)__LC_SUBCHANNEL_NR); |
|
rc |= put_guest_lc(vcpu, io->io_int_parm, (u32 *)__LC_IO_INT_PARM); |
|
rc |= put_guest_lc(vcpu, io->io_int_word, (u32 *)__LC_IO_INT_WORD); |
|
rc |= write_guest_lc(vcpu, __LC_IO_OLD_PSW, |
|
&vcpu->arch.sie_block->gpsw, |
|
sizeof(psw_t)); |
|
rc |= read_guest_lc(vcpu, __LC_IO_NEW_PSW, |
|
&vcpu->arch.sie_block->gpsw, |
|
sizeof(psw_t)); |
|
return rc ? -EFAULT : 0; |
|
} |
|
|
|
static int __must_check __deliver_io(struct kvm_vcpu *vcpu, |
|
unsigned long irq_type) |
|
{ |
|
struct list_head *isc_list; |
|
struct kvm_s390_float_interrupt *fi; |
|
struct kvm_s390_gisa_interrupt *gi = &vcpu->kvm->arch.gisa_int; |
|
struct kvm_s390_interrupt_info *inti = NULL; |
|
struct kvm_s390_io_info io; |
|
u32 isc; |
|
int rc = 0; |
|
|
|
fi = &vcpu->kvm->arch.float_int; |
|
|
|
spin_lock(&fi->lock); |
|
isc = irq_type_to_isc(irq_type); |
|
isc_list = &fi->lists[isc]; |
|
inti = list_first_entry_or_null(isc_list, |
|
struct kvm_s390_interrupt_info, |
|
list); |
|
if (inti) { |
|
if (inti->type & KVM_S390_INT_IO_AI_MASK) |
|
VCPU_EVENT(vcpu, 4, "%s", "deliver: I/O (AI)"); |
|
else |
|
VCPU_EVENT(vcpu, 4, "deliver: I/O %x ss %x schid %04x", |
|
inti->io.subchannel_id >> 8, |
|
inti->io.subchannel_id >> 1 & 0x3, |
|
inti->io.subchannel_nr); |
|
|
|
vcpu->stat.deliver_io++; |
|
trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, |
|
inti->type, |
|
((__u32)inti->io.subchannel_id << 16) | |
|
inti->io.subchannel_nr, |
|
((__u64)inti->io.io_int_parm << 32) | |
|
inti->io.io_int_word); |
|
list_del(&inti->list); |
|
fi->counters[FIRQ_CNTR_IO] -= 1; |
|
} |
|
if (list_empty(isc_list)) |
|
clear_bit(irq_type, &fi->pending_irqs); |
|
spin_unlock(&fi->lock); |
|
|
|
if (inti) { |
|
rc = __do_deliver_io(vcpu, &(inti->io)); |
|
kfree(inti); |
|
goto out; |
|
} |
|
|
|
if (gi->origin && gisa_tac_ipm_gisc(gi->origin, isc)) { |
|
/* |
|
* in case an adapter interrupt was not delivered |
|
* in SIE context KVM will handle the delivery |
|
*/ |
|
VCPU_EVENT(vcpu, 4, "%s isc %u", "deliver: I/O (AI/gisa)", isc); |
|
memset(&io, 0, sizeof(io)); |
|
io.io_int_word = isc_to_int_word(isc); |
|
vcpu->stat.deliver_io++; |
|
trace_kvm_s390_deliver_interrupt(vcpu->vcpu_id, |
|
KVM_S390_INT_IO(1, 0, 0, 0), |
|
((__u32)io.subchannel_id << 16) | |
|
io.subchannel_nr, |
|
((__u64)io.io_int_parm << 32) | |
|
io.io_int_word); |
|
rc = __do_deliver_io(vcpu, &io); |
|
} |
|
out: |
|
return rc; |
|
} |
|
|
|
/* Check whether an external call is pending (deliverable or not) */ |
|
int kvm_s390_ext_call_pending(struct kvm_vcpu *vcpu) |
|
{ |
|
struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
|
|
|
if (!sclp.has_sigpif) |
|
return test_bit(IRQ_PEND_EXT_EXTERNAL, &li->pending_irqs); |
|
|
|
return sca_ext_call_pending(vcpu, NULL); |
|
} |
|
|
|
int kvm_s390_vcpu_has_irq(struct kvm_vcpu *vcpu, int exclude_stop) |
|
{ |
|
if (deliverable_irqs(vcpu)) |
|
return 1; |
|
|
|
if (kvm_cpu_has_pending_timer(vcpu)) |
|
return 1; |
|
|
|
/* external call pending and deliverable */ |
|
if (kvm_s390_ext_call_pending(vcpu) && |
|
!psw_extint_disabled(vcpu) && |
|
(vcpu->arch.sie_block->gcr[0] & CR0_EXTERNAL_CALL_SUBMASK)) |
|
return 1; |
|
|
|
if (!exclude_stop && kvm_s390_is_stop_irq_pending(vcpu)) |
|
return 1; |
|
return 0; |
|
} |
|
|
|
int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu) |
|
{ |
|
return ckc_irq_pending(vcpu) || cpu_timer_irq_pending(vcpu); |
|
} |
|
|
|
static u64 __calculate_sltime(struct kvm_vcpu *vcpu) |
|
{ |
|
const u64 now = kvm_s390_get_tod_clock_fast(vcpu->kvm); |
|
const u64 ckc = vcpu->arch.sie_block->ckc; |
|
u64 cputm, sltime = 0; |
|
|
|
if (ckc_interrupts_enabled(vcpu)) { |
|
if (vcpu->arch.sie_block->gcr[0] & CR0_CLOCK_COMPARATOR_SIGN) { |
|
if ((s64)now < (s64)ckc) |
|
sltime = tod_to_ns((s64)ckc - (s64)now); |
|
} else if (now < ckc) { |
|
sltime = tod_to_ns(ckc - now); |
|
} |
|
/* already expired */ |
|
if (!sltime) |
|
return 0; |
|
if (cpu_timer_interrupts_enabled(vcpu)) { |
|
cputm = kvm_s390_get_cpu_timer(vcpu); |
|
/* already expired? */ |
|
if (cputm >> 63) |
|
return 0; |
|
return min_t(u64, sltime, tod_to_ns(cputm)); |
|
} |
|
} else if (cpu_timer_interrupts_enabled(vcpu)) { |
|
sltime = kvm_s390_get_cpu_timer(vcpu); |
|
/* already expired? */ |
|
if (sltime >> 63) |
|
return 0; |
|
} |
|
return sltime; |
|
} |
|
|
|
int kvm_s390_handle_wait(struct kvm_vcpu *vcpu) |
|
{ |
|
struct kvm_s390_gisa_interrupt *gi = &vcpu->kvm->arch.gisa_int; |
|
u64 sltime; |
|
|
|
vcpu->stat.exit_wait_state++; |
|
|
|
/* fast path */ |
|
if (kvm_arch_vcpu_runnable(vcpu)) |
|
return 0; |
|
|
|
if (psw_interrupts_disabled(vcpu)) { |
|
VCPU_EVENT(vcpu, 3, "%s", "disabled wait"); |
|
return -EOPNOTSUPP; /* disabled wait */ |
|
} |
|
|
|
if (gi->origin && |
|
(gisa_get_ipm_or_restore_iam(gi) & |
|
vcpu->arch.sie_block->gcr[6] >> 24)) |
|
return 0; |
|
|
|
if (!ckc_interrupts_enabled(vcpu) && |
|
!cpu_timer_interrupts_enabled(vcpu)) { |
|
VCPU_EVENT(vcpu, 3, "%s", "enabled wait w/o timer"); |
|
__set_cpu_idle(vcpu); |
|
goto no_timer; |
|
} |
|
|
|
sltime = __calculate_sltime(vcpu); |
|
if (!sltime) |
|
return 0; |
|
|
|
__set_cpu_idle(vcpu); |
|
hrtimer_start(&vcpu->arch.ckc_timer, sltime, HRTIMER_MODE_REL); |
|
VCPU_EVENT(vcpu, 4, "enabled wait: %llu ns", sltime); |
|
no_timer: |
|
srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx); |
|
kvm_vcpu_block(vcpu); |
|
__unset_cpu_idle(vcpu); |
|
vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); |
|
|
|
hrtimer_cancel(&vcpu->arch.ckc_timer); |
|
return 0; |
|
} |
|
|
|
void kvm_s390_vcpu_wakeup(struct kvm_vcpu *vcpu) |
|
{ |
|
vcpu->valid_wakeup = true; |
|
kvm_vcpu_wake_up(vcpu); |
|
|
|
/* |
|
* The VCPU might not be sleeping but rather executing VSIE. Let's |
|
* kick it, so it leaves the SIE to process the request. |
|
*/ |
|
kvm_s390_vsie_kick(vcpu); |
|
} |
|
|
|
enum hrtimer_restart kvm_s390_idle_wakeup(struct hrtimer *timer) |
|
{ |
|
struct kvm_vcpu *vcpu; |
|
u64 sltime; |
|
|
|
vcpu = container_of(timer, struct kvm_vcpu, arch.ckc_timer); |
|
sltime = __calculate_sltime(vcpu); |
|
|
|
/* |
|
* If the monotonic clock runs faster than the tod clock we might be |
|
* woken up too early and have to go back to sleep to avoid deadlocks. |
|
*/ |
|
if (sltime && hrtimer_forward_now(timer, ns_to_ktime(sltime))) |
|
return HRTIMER_RESTART; |
|
kvm_s390_vcpu_wakeup(vcpu); |
|
return HRTIMER_NORESTART; |
|
} |
|
|
|
void kvm_s390_clear_local_irqs(struct kvm_vcpu *vcpu) |
|
{ |
|
struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
|
|
|
spin_lock(&li->lock); |
|
li->pending_irqs = 0; |
|
bitmap_zero(li->sigp_emerg_pending, KVM_MAX_VCPUS); |
|
memset(&li->irq, 0, sizeof(li->irq)); |
|
spin_unlock(&li->lock); |
|
|
|
sca_clear_ext_call(vcpu); |
|
} |
|
|
|
int __must_check kvm_s390_deliver_pending_interrupts(struct kvm_vcpu *vcpu) |
|
{ |
|
struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
|
int rc = 0; |
|
unsigned long irq_type; |
|
unsigned long irqs; |
|
|
|
__reset_intercept_indicators(vcpu); |
|
|
|
/* pending ckc conditions might have been invalidated */ |
|
clear_bit(IRQ_PEND_EXT_CLOCK_COMP, &li->pending_irqs); |
|
if (ckc_irq_pending(vcpu)) |
|
set_bit(IRQ_PEND_EXT_CLOCK_COMP, &li->pending_irqs); |
|
|
|
/* pending cpu timer conditions might have been invalidated */ |
|
clear_bit(IRQ_PEND_EXT_CPU_TIMER, &li->pending_irqs); |
|
if (cpu_timer_irq_pending(vcpu)) |
|
set_bit(IRQ_PEND_EXT_CPU_TIMER, &li->pending_irqs); |
|
|
|
while ((irqs = deliverable_irqs(vcpu)) && !rc) { |
|
/* bits are in the reverse order of interrupt priority */ |
|
irq_type = find_last_bit(&irqs, IRQ_PEND_COUNT); |
|
switch (irq_type) { |
|
case IRQ_PEND_IO_ISC_0: |
|
case IRQ_PEND_IO_ISC_1: |
|
case IRQ_PEND_IO_ISC_2: |
|
case IRQ_PEND_IO_ISC_3: |
|
case IRQ_PEND_IO_ISC_4: |
|
case IRQ_PEND_IO_ISC_5: |
|
case IRQ_PEND_IO_ISC_6: |
|
case IRQ_PEND_IO_ISC_7: |
|
rc = __deliver_io(vcpu, irq_type); |
|
break; |
|
case IRQ_PEND_MCHK_EX: |
|
case IRQ_PEND_MCHK_REP: |
|
rc = __deliver_machine_check(vcpu); |
|
break; |
|
case IRQ_PEND_PROG: |
|
rc = __deliver_prog(vcpu); |
|
break; |
|
case IRQ_PEND_EXT_EMERGENCY: |
|
rc = __deliver_emergency_signal(vcpu); |
|
break; |
|
case IRQ_PEND_EXT_EXTERNAL: |
|
rc = __deliver_external_call(vcpu); |
|
break; |
|
case IRQ_PEND_EXT_CLOCK_COMP: |
|
rc = __deliver_ckc(vcpu); |
|
break; |
|
case IRQ_PEND_EXT_CPU_TIMER: |
|
rc = __deliver_cpu_timer(vcpu); |
|
break; |
|
case IRQ_PEND_RESTART: |
|
rc = __deliver_restart(vcpu); |
|
break; |
|
case IRQ_PEND_SET_PREFIX: |
|
rc = __deliver_set_prefix(vcpu); |
|
break; |
|
case IRQ_PEND_PFAULT_INIT: |
|
rc = __deliver_pfault_init(vcpu); |
|
break; |
|
case IRQ_PEND_EXT_SERVICE: |
|
rc = __deliver_service(vcpu); |
|
break; |
|
case IRQ_PEND_EXT_SERVICE_EV: |
|
rc = __deliver_service_ev(vcpu); |
|
break; |
|
case IRQ_PEND_PFAULT_DONE: |
|
rc = __deliver_pfault_done(vcpu); |
|
break; |
|
case IRQ_PEND_VIRTIO: |
|
rc = __deliver_virtio(vcpu); |
|
break; |
|
default: |
|
WARN_ONCE(1, "Unknown pending irq type %ld", irq_type); |
|
clear_bit(irq_type, &li->pending_irqs); |
|
} |
|
} |
|
|
|
set_intercept_indicators(vcpu); |
|
|
|
return rc; |
|
} |
|
|
|
static int __inject_prog(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq) |
|
{ |
|
struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
|
|
|
vcpu->stat.inject_program++; |
|
VCPU_EVENT(vcpu, 3, "inject: program irq code 0x%x", irq->u.pgm.code); |
|
trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_PROGRAM_INT, |
|
irq->u.pgm.code, 0); |
|
|
|
if (!(irq->u.pgm.flags & KVM_S390_PGM_FLAGS_ILC_VALID)) { |
|
/* auto detection if no valid ILC was given */ |
|
irq->u.pgm.flags &= ~KVM_S390_PGM_FLAGS_ILC_MASK; |
|
irq->u.pgm.flags |= kvm_s390_get_ilen(vcpu); |
|
irq->u.pgm.flags |= KVM_S390_PGM_FLAGS_ILC_VALID; |
|
} |
|
|
|
if (irq->u.pgm.code == PGM_PER) { |
|
li->irq.pgm.code |= PGM_PER; |
|
li->irq.pgm.flags = irq->u.pgm.flags; |
|
/* only modify PER related information */ |
|
li->irq.pgm.per_address = irq->u.pgm.per_address; |
|
li->irq.pgm.per_code = irq->u.pgm.per_code; |
|
li->irq.pgm.per_atmid = irq->u.pgm.per_atmid; |
|
li->irq.pgm.per_access_id = irq->u.pgm.per_access_id; |
|
} else if (!(irq->u.pgm.code & PGM_PER)) { |
|
li->irq.pgm.code = (li->irq.pgm.code & PGM_PER) | |
|
irq->u.pgm.code; |
|
li->irq.pgm.flags = irq->u.pgm.flags; |
|
/* only modify non-PER information */ |
|
li->irq.pgm.trans_exc_code = irq->u.pgm.trans_exc_code; |
|
li->irq.pgm.mon_code = irq->u.pgm.mon_code; |
|
li->irq.pgm.data_exc_code = irq->u.pgm.data_exc_code; |
|
li->irq.pgm.mon_class_nr = irq->u.pgm.mon_class_nr; |
|
li->irq.pgm.exc_access_id = irq->u.pgm.exc_access_id; |
|
li->irq.pgm.op_access_id = irq->u.pgm.op_access_id; |
|
} else { |
|
li->irq.pgm = irq->u.pgm; |
|
} |
|
set_bit(IRQ_PEND_PROG, &li->pending_irqs); |
|
return 0; |
|
} |
|
|
|
static int __inject_pfault_init(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq) |
|
{ |
|
struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
|
|
|
vcpu->stat.inject_pfault_init++; |
|
VCPU_EVENT(vcpu, 4, "inject: pfault init parameter block at 0x%llx", |
|
irq->u.ext.ext_params2); |
|
trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_PFAULT_INIT, |
|
irq->u.ext.ext_params, |
|
irq->u.ext.ext_params2); |
|
|
|
li->irq.ext = irq->u.ext; |
|
set_bit(IRQ_PEND_PFAULT_INIT, &li->pending_irqs); |
|
kvm_s390_set_cpuflags(vcpu, CPUSTAT_EXT_INT); |
|
return 0; |
|
} |
|
|
|
static int __inject_extcall(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq) |
|
{ |
|
struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
|
struct kvm_s390_extcall_info *extcall = &li->irq.extcall; |
|
uint16_t src_id = irq->u.extcall.code; |
|
|
|
vcpu->stat.inject_external_call++; |
|
VCPU_EVENT(vcpu, 4, "inject: external call source-cpu:%u", |
|
src_id); |
|
trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_EXTERNAL_CALL, |
|
src_id, 0); |
|
|
|
/* sending vcpu invalid */ |
|
if (kvm_get_vcpu_by_id(vcpu->kvm, src_id) == NULL) |
|
return -EINVAL; |
|
|
|
if (sclp.has_sigpif && !kvm_s390_pv_cpu_get_handle(vcpu)) |
|
return sca_inject_ext_call(vcpu, src_id); |
|
|
|
if (test_and_set_bit(IRQ_PEND_EXT_EXTERNAL, &li->pending_irqs)) |
|
return -EBUSY; |
|
*extcall = irq->u.extcall; |
|
kvm_s390_set_cpuflags(vcpu, CPUSTAT_EXT_INT); |
|
return 0; |
|
} |
|
|
|
static int __inject_set_prefix(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq) |
|
{ |
|
struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
|
struct kvm_s390_prefix_info *prefix = &li->irq.prefix; |
|
|
|
vcpu->stat.inject_set_prefix++; |
|
VCPU_EVENT(vcpu, 3, "inject: set prefix to %x", |
|
irq->u.prefix.address); |
|
trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_SIGP_SET_PREFIX, |
|
irq->u.prefix.address, 0); |
|
|
|
if (!is_vcpu_stopped(vcpu)) |
|
return -EBUSY; |
|
|
|
*prefix = irq->u.prefix; |
|
set_bit(IRQ_PEND_SET_PREFIX, &li->pending_irqs); |
|
return 0; |
|
} |
|
|
|
#define KVM_S390_STOP_SUPP_FLAGS (KVM_S390_STOP_FLAG_STORE_STATUS) |
|
static int __inject_sigp_stop(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq) |
|
{ |
|
struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
|
struct kvm_s390_stop_info *stop = &li->irq.stop; |
|
int rc = 0; |
|
|
|
vcpu->stat.inject_stop_signal++; |
|
trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_SIGP_STOP, 0, 0); |
|
|
|
if (irq->u.stop.flags & ~KVM_S390_STOP_SUPP_FLAGS) |
|
return -EINVAL; |
|
|
|
if (is_vcpu_stopped(vcpu)) { |
|
if (irq->u.stop.flags & KVM_S390_STOP_FLAG_STORE_STATUS) |
|
rc = kvm_s390_store_status_unloaded(vcpu, |
|
KVM_S390_STORE_STATUS_NOADDR); |
|
return rc; |
|
} |
|
|
|
if (test_and_set_bit(IRQ_PEND_SIGP_STOP, &li->pending_irqs)) |
|
return -EBUSY; |
|
stop->flags = irq->u.stop.flags; |
|
kvm_s390_set_cpuflags(vcpu, CPUSTAT_STOP_INT); |
|
return 0; |
|
} |
|
|
|
static int __inject_sigp_restart(struct kvm_vcpu *vcpu) |
|
{ |
|
struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
|
|
|
vcpu->stat.inject_restart++; |
|
VCPU_EVENT(vcpu, 3, "%s", "inject: restart int"); |
|
trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_RESTART, 0, 0); |
|
|
|
set_bit(IRQ_PEND_RESTART, &li->pending_irqs); |
|
return 0; |
|
} |
|
|
|
static int __inject_sigp_emergency(struct kvm_vcpu *vcpu, |
|
struct kvm_s390_irq *irq) |
|
{ |
|
struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
|
|
|
vcpu->stat.inject_emergency_signal++; |
|
VCPU_EVENT(vcpu, 4, "inject: emergency from cpu %u", |
|
irq->u.emerg.code); |
|
trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_EMERGENCY, |
|
irq->u.emerg.code, 0); |
|
|
|
/* sending vcpu invalid */ |
|
if (kvm_get_vcpu_by_id(vcpu->kvm, irq->u.emerg.code) == NULL) |
|
return -EINVAL; |
|
|
|
set_bit(irq->u.emerg.code, li->sigp_emerg_pending); |
|
set_bit(IRQ_PEND_EXT_EMERGENCY, &li->pending_irqs); |
|
kvm_s390_set_cpuflags(vcpu, CPUSTAT_EXT_INT); |
|
return 0; |
|
} |
|
|
|
static int __inject_mchk(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq) |
|
{ |
|
struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
|
struct kvm_s390_mchk_info *mchk = &li->irq.mchk; |
|
|
|
vcpu->stat.inject_mchk++; |
|
VCPU_EVENT(vcpu, 3, "inject: machine check mcic 0x%llx", |
|
irq->u.mchk.mcic); |
|
trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_MCHK, 0, |
|
irq->u.mchk.mcic); |
|
|
|
/* |
|
* Because repressible machine checks can be indicated along with |
|
* exigent machine checks (PoP, Chapter 11, Interruption action) |
|
* we need to combine cr14, mcic and external damage code. |
|
* Failing storage address and the logout area should not be or'ed |
|
* together, we just indicate the last occurrence of the corresponding |
|
* machine check |
|
*/ |
|
mchk->cr14 |= irq->u.mchk.cr14; |
|
mchk->mcic |= irq->u.mchk.mcic; |
|
mchk->ext_damage_code |= irq->u.mchk.ext_damage_code; |
|
mchk->failing_storage_address = irq->u.mchk.failing_storage_address; |
|
memcpy(&mchk->fixed_logout, &irq->u.mchk.fixed_logout, |
|
sizeof(mchk->fixed_logout)); |
|
if (mchk->mcic & MCHK_EX_MASK) |
|
set_bit(IRQ_PEND_MCHK_EX, &li->pending_irqs); |
|
else if (mchk->mcic & MCHK_REP_MASK) |
|
set_bit(IRQ_PEND_MCHK_REP, &li->pending_irqs); |
|
return 0; |
|
} |
|
|
|
static int __inject_ckc(struct kvm_vcpu *vcpu) |
|
{ |
|
struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
|
|
|
vcpu->stat.inject_ckc++; |
|
VCPU_EVENT(vcpu, 3, "%s", "inject: clock comparator external"); |
|
trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_CLOCK_COMP, |
|
0, 0); |
|
|
|
set_bit(IRQ_PEND_EXT_CLOCK_COMP, &li->pending_irqs); |
|
kvm_s390_set_cpuflags(vcpu, CPUSTAT_EXT_INT); |
|
return 0; |
|
} |
|
|
|
static int __inject_cpu_timer(struct kvm_vcpu *vcpu) |
|
{ |
|
struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
|
|
|
vcpu->stat.inject_cputm++; |
|
VCPU_EVENT(vcpu, 3, "%s", "inject: cpu timer external"); |
|
trace_kvm_s390_inject_vcpu(vcpu->vcpu_id, KVM_S390_INT_CPU_TIMER, |
|
0, 0); |
|
|
|
set_bit(IRQ_PEND_EXT_CPU_TIMER, &li->pending_irqs); |
|
kvm_s390_set_cpuflags(vcpu, CPUSTAT_EXT_INT); |
|
return 0; |
|
} |
|
|
|
static struct kvm_s390_interrupt_info *get_io_int(struct kvm *kvm, |
|
int isc, u32 schid) |
|
{ |
|
struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int; |
|
struct list_head *isc_list = &fi->lists[FIRQ_LIST_IO_ISC_0 + isc]; |
|
struct kvm_s390_interrupt_info *iter; |
|
u16 id = (schid & 0xffff0000U) >> 16; |
|
u16 nr = schid & 0x0000ffffU; |
|
|
|
spin_lock(&fi->lock); |
|
list_for_each_entry(iter, isc_list, list) { |
|
if (schid && (id != iter->io.subchannel_id || |
|
nr != iter->io.subchannel_nr)) |
|
continue; |
|
/* found an appropriate entry */ |
|
list_del_init(&iter->list); |
|
fi->counters[FIRQ_CNTR_IO] -= 1; |
|
if (list_empty(isc_list)) |
|
clear_bit(isc_to_irq_type(isc), &fi->pending_irqs); |
|
spin_unlock(&fi->lock); |
|
return iter; |
|
} |
|
spin_unlock(&fi->lock); |
|
return NULL; |
|
} |
|
|
|
static struct kvm_s390_interrupt_info *get_top_io_int(struct kvm *kvm, |
|
u64 isc_mask, u32 schid) |
|
{ |
|
struct kvm_s390_interrupt_info *inti = NULL; |
|
int isc; |
|
|
|
for (isc = 0; isc <= MAX_ISC && !inti; isc++) { |
|
if (isc_mask & isc_to_isc_bits(isc)) |
|
inti = get_io_int(kvm, isc, schid); |
|
} |
|
return inti; |
|
} |
|
|
|
static int get_top_gisa_isc(struct kvm *kvm, u64 isc_mask, u32 schid) |
|
{ |
|
struct kvm_s390_gisa_interrupt *gi = &kvm->arch.gisa_int; |
|
unsigned long active_mask; |
|
int isc; |
|
|
|
if (schid) |
|
goto out; |
|
if (!gi->origin) |
|
goto out; |
|
|
|
active_mask = (isc_mask & gisa_get_ipm(gi->origin) << 24) << 32; |
|
while (active_mask) { |
|
isc = __fls(active_mask) ^ (BITS_PER_LONG - 1); |
|
if (gisa_tac_ipm_gisc(gi->origin, isc)) |
|
return isc; |
|
clear_bit_inv(isc, &active_mask); |
|
} |
|
out: |
|
return -EINVAL; |
|
} |
|
|
|
/* |
|
* Dequeue and return an I/O interrupt matching any of the interruption |
|
* subclasses as designated by the isc mask in cr6 and the schid (if != 0). |
|
* Take into account the interrupts pending in the interrupt list and in GISA. |
|
* |
|
* Note that for a guest that does not enable I/O interrupts |
|
* but relies on TPI, a flood of classic interrupts may starve |
|
* out adapter interrupts on the same isc. Linux does not do |
|
* that, and it is possible to work around the issue by configuring |
|
* different iscs for classic and adapter interrupts in the guest, |
|
* but we may want to revisit this in the future. |
|
*/ |
|
struct kvm_s390_interrupt_info *kvm_s390_get_io_int(struct kvm *kvm, |
|
u64 isc_mask, u32 schid) |
|
{ |
|
struct kvm_s390_gisa_interrupt *gi = &kvm->arch.gisa_int; |
|
struct kvm_s390_interrupt_info *inti, *tmp_inti; |
|
int isc; |
|
|
|
inti = get_top_io_int(kvm, isc_mask, schid); |
|
|
|
isc = get_top_gisa_isc(kvm, isc_mask, schid); |
|
if (isc < 0) |
|
/* no AI in GISA */ |
|
goto out; |
|
|
|
if (!inti) |
|
/* AI in GISA but no classical IO int */ |
|
goto gisa_out; |
|
|
|
/* both types of interrupts present */ |
|
if (int_word_to_isc(inti->io.io_int_word) <= isc) { |
|
/* classical IO int with higher priority */ |
|
gisa_set_ipm_gisc(gi->origin, isc); |
|
goto out; |
|
} |
|
gisa_out: |
|
tmp_inti = kzalloc(sizeof(*inti), GFP_KERNEL_ACCOUNT); |
|
if (tmp_inti) { |
|
tmp_inti->type = KVM_S390_INT_IO(1, 0, 0, 0); |
|
tmp_inti->io.io_int_word = isc_to_int_word(isc); |
|
if (inti) |
|
kvm_s390_reinject_io_int(kvm, inti); |
|
inti = tmp_inti; |
|
} else |
|
gisa_set_ipm_gisc(gi->origin, isc); |
|
out: |
|
return inti; |
|
} |
|
|
|
static int __inject_service(struct kvm *kvm, |
|
struct kvm_s390_interrupt_info *inti) |
|
{ |
|
struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int; |
|
|
|
kvm->stat.inject_service_signal++; |
|
spin_lock(&fi->lock); |
|
fi->srv_signal.ext_params |= inti->ext.ext_params & SCCB_EVENT_PENDING; |
|
|
|
/* We always allow events, track them separately from the sccb ints */ |
|
if (fi->srv_signal.ext_params & SCCB_EVENT_PENDING) |
|
set_bit(IRQ_PEND_EXT_SERVICE_EV, &fi->pending_irqs); |
|
|
|
/* |
|
* Early versions of the QEMU s390 bios will inject several |
|
* service interrupts after another without handling a |
|
* condition code indicating busy. |
|
* We will silently ignore those superfluous sccb values. |
|
* A future version of QEMU will take care of serialization |
|
* of servc requests |
|
*/ |
|
if (fi->srv_signal.ext_params & SCCB_MASK) |
|
goto out; |
|
fi->srv_signal.ext_params |= inti->ext.ext_params & SCCB_MASK; |
|
set_bit(IRQ_PEND_EXT_SERVICE, &fi->pending_irqs); |
|
out: |
|
spin_unlock(&fi->lock); |
|
kfree(inti); |
|
return 0; |
|
} |
|
|
|
static int __inject_virtio(struct kvm *kvm, |
|
struct kvm_s390_interrupt_info *inti) |
|
{ |
|
struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int; |
|
|
|
kvm->stat.inject_virtio++; |
|
spin_lock(&fi->lock); |
|
if (fi->counters[FIRQ_CNTR_VIRTIO] >= KVM_S390_MAX_VIRTIO_IRQS) { |
|
spin_unlock(&fi->lock); |
|
return -EBUSY; |
|
} |
|
fi->counters[FIRQ_CNTR_VIRTIO] += 1; |
|
list_add_tail(&inti->list, &fi->lists[FIRQ_LIST_VIRTIO]); |
|
set_bit(IRQ_PEND_VIRTIO, &fi->pending_irqs); |
|
spin_unlock(&fi->lock); |
|
return 0; |
|
} |
|
|
|
static int __inject_pfault_done(struct kvm *kvm, |
|
struct kvm_s390_interrupt_info *inti) |
|
{ |
|
struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int; |
|
|
|
kvm->stat.inject_pfault_done++; |
|
spin_lock(&fi->lock); |
|
if (fi->counters[FIRQ_CNTR_PFAULT] >= |
|
(ASYNC_PF_PER_VCPU * KVM_MAX_VCPUS)) { |
|
spin_unlock(&fi->lock); |
|
return -EBUSY; |
|
} |
|
fi->counters[FIRQ_CNTR_PFAULT] += 1; |
|
list_add_tail(&inti->list, &fi->lists[FIRQ_LIST_PFAULT]); |
|
set_bit(IRQ_PEND_PFAULT_DONE, &fi->pending_irqs); |
|
spin_unlock(&fi->lock); |
|
return 0; |
|
} |
|
|
|
#define CR_PENDING_SUBCLASS 28 |
|
static int __inject_float_mchk(struct kvm *kvm, |
|
struct kvm_s390_interrupt_info *inti) |
|
{ |
|
struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int; |
|
|
|
kvm->stat.inject_float_mchk++; |
|
spin_lock(&fi->lock); |
|
fi->mchk.cr14 |= inti->mchk.cr14 & (1UL << CR_PENDING_SUBCLASS); |
|
fi->mchk.mcic |= inti->mchk.mcic; |
|
set_bit(IRQ_PEND_MCHK_REP, &fi->pending_irqs); |
|
spin_unlock(&fi->lock); |
|
kfree(inti); |
|
return 0; |
|
} |
|
|
|
static int __inject_io(struct kvm *kvm, struct kvm_s390_interrupt_info *inti) |
|
{ |
|
struct kvm_s390_gisa_interrupt *gi = &kvm->arch.gisa_int; |
|
struct kvm_s390_float_interrupt *fi; |
|
struct list_head *list; |
|
int isc; |
|
|
|
kvm->stat.inject_io++; |
|
isc = int_word_to_isc(inti->io.io_int_word); |
|
|
|
/* |
|
* Do not make use of gisa in protected mode. We do not use the lock |
|
* checking variant as this is just a performance optimization and we |
|
* do not hold the lock here. This is ok as the code will pick |
|
* interrupts from both "lists" for delivery. |
|
*/ |
|
if (!kvm_s390_pv_get_handle(kvm) && |
|
gi->origin && inti->type & KVM_S390_INT_IO_AI_MASK) { |
|
VM_EVENT(kvm, 4, "%s isc %1u", "inject: I/O (AI/gisa)", isc); |
|
gisa_set_ipm_gisc(gi->origin, isc); |
|
kfree(inti); |
|
return 0; |
|
} |
|
|
|
fi = &kvm->arch.float_int; |
|
spin_lock(&fi->lock); |
|
if (fi->counters[FIRQ_CNTR_IO] >= KVM_S390_MAX_FLOAT_IRQS) { |
|
spin_unlock(&fi->lock); |
|
return -EBUSY; |
|
} |
|
fi->counters[FIRQ_CNTR_IO] += 1; |
|
|
|
if (inti->type & KVM_S390_INT_IO_AI_MASK) |
|
VM_EVENT(kvm, 4, "%s", "inject: I/O (AI)"); |
|
else |
|
VM_EVENT(kvm, 4, "inject: I/O %x ss %x schid %04x", |
|
inti->io.subchannel_id >> 8, |
|
inti->io.subchannel_id >> 1 & 0x3, |
|
inti->io.subchannel_nr); |
|
list = &fi->lists[FIRQ_LIST_IO_ISC_0 + isc]; |
|
list_add_tail(&inti->list, list); |
|
set_bit(isc_to_irq_type(isc), &fi->pending_irqs); |
|
spin_unlock(&fi->lock); |
|
return 0; |
|
} |
|
|
|
/* |
|
* Find a destination VCPU for a floating irq and kick it. |
|
*/ |
|
static void __floating_irq_kick(struct kvm *kvm, u64 type) |
|
{ |
|
struct kvm_vcpu *dst_vcpu; |
|
int sigcpu, online_vcpus, nr_tries = 0; |
|
|
|
online_vcpus = atomic_read(&kvm->online_vcpus); |
|
if (!online_vcpus) |
|
return; |
|
|
|
/* find idle VCPUs first, then round robin */ |
|
sigcpu = find_first_bit(kvm->arch.idle_mask, online_vcpus); |
|
if (sigcpu == online_vcpus) { |
|
do { |
|
sigcpu = kvm->arch.float_int.next_rr_cpu++; |
|
kvm->arch.float_int.next_rr_cpu %= online_vcpus; |
|
/* avoid endless loops if all vcpus are stopped */ |
|
if (nr_tries++ >= online_vcpus) |
|
return; |
|
} while (is_vcpu_stopped(kvm_get_vcpu(kvm, sigcpu))); |
|
} |
|
dst_vcpu = kvm_get_vcpu(kvm, sigcpu); |
|
|
|
/* make the VCPU drop out of the SIE, or wake it up if sleeping */ |
|
switch (type) { |
|
case KVM_S390_MCHK: |
|
kvm_s390_set_cpuflags(dst_vcpu, CPUSTAT_STOP_INT); |
|
break; |
|
case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX: |
|
if (!(type & KVM_S390_INT_IO_AI_MASK && |
|
kvm->arch.gisa_int.origin) || |
|
kvm_s390_pv_cpu_get_handle(dst_vcpu)) |
|
kvm_s390_set_cpuflags(dst_vcpu, CPUSTAT_IO_INT); |
|
break; |
|
default: |
|
kvm_s390_set_cpuflags(dst_vcpu, CPUSTAT_EXT_INT); |
|
break; |
|
} |
|
kvm_s390_vcpu_wakeup(dst_vcpu); |
|
} |
|
|
|
static int __inject_vm(struct kvm *kvm, struct kvm_s390_interrupt_info *inti) |
|
{ |
|
u64 type = READ_ONCE(inti->type); |
|
int rc; |
|
|
|
switch (type) { |
|
case KVM_S390_MCHK: |
|
rc = __inject_float_mchk(kvm, inti); |
|
break; |
|
case KVM_S390_INT_VIRTIO: |
|
rc = __inject_virtio(kvm, inti); |
|
break; |
|
case KVM_S390_INT_SERVICE: |
|
rc = __inject_service(kvm, inti); |
|
break; |
|
case KVM_S390_INT_PFAULT_DONE: |
|
rc = __inject_pfault_done(kvm, inti); |
|
break; |
|
case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX: |
|
rc = __inject_io(kvm, inti); |
|
break; |
|
default: |
|
rc = -EINVAL; |
|
} |
|
if (rc) |
|
return rc; |
|
|
|
__floating_irq_kick(kvm, type); |
|
return 0; |
|
} |
|
|
|
int kvm_s390_inject_vm(struct kvm *kvm, |
|
struct kvm_s390_interrupt *s390int) |
|
{ |
|
struct kvm_s390_interrupt_info *inti; |
|
int rc; |
|
|
|
inti = kzalloc(sizeof(*inti), GFP_KERNEL_ACCOUNT); |
|
if (!inti) |
|
return -ENOMEM; |
|
|
|
inti->type = s390int->type; |
|
switch (inti->type) { |
|
case KVM_S390_INT_VIRTIO: |
|
VM_EVENT(kvm, 5, "inject: virtio parm:%x,parm64:%llx", |
|
s390int->parm, s390int->parm64); |
|
inti->ext.ext_params = s390int->parm; |
|
inti->ext.ext_params2 = s390int->parm64; |
|
break; |
|
case KVM_S390_INT_SERVICE: |
|
VM_EVENT(kvm, 4, "inject: sclp parm:%x", s390int->parm); |
|
inti->ext.ext_params = s390int->parm; |
|
break; |
|
case KVM_S390_INT_PFAULT_DONE: |
|
inti->ext.ext_params2 = s390int->parm64; |
|
break; |
|
case KVM_S390_MCHK: |
|
VM_EVENT(kvm, 3, "inject: machine check mcic 0x%llx", |
|
s390int->parm64); |
|
inti->mchk.cr14 = s390int->parm; /* upper bits are not used */ |
|
inti->mchk.mcic = s390int->parm64; |
|
break; |
|
case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX: |
|
inti->io.subchannel_id = s390int->parm >> 16; |
|
inti->io.subchannel_nr = s390int->parm & 0x0000ffffu; |
|
inti->io.io_int_parm = s390int->parm64 >> 32; |
|
inti->io.io_int_word = s390int->parm64 & 0x00000000ffffffffull; |
|
break; |
|
default: |
|
kfree(inti); |
|
return -EINVAL; |
|
} |
|
trace_kvm_s390_inject_vm(s390int->type, s390int->parm, s390int->parm64, |
|
2); |
|
|
|
rc = __inject_vm(kvm, inti); |
|
if (rc) |
|
kfree(inti); |
|
return rc; |
|
} |
|
|
|
int kvm_s390_reinject_io_int(struct kvm *kvm, |
|
struct kvm_s390_interrupt_info *inti) |
|
{ |
|
return __inject_vm(kvm, inti); |
|
} |
|
|
|
int s390int_to_s390irq(struct kvm_s390_interrupt *s390int, |
|
struct kvm_s390_irq *irq) |
|
{ |
|
irq->type = s390int->type; |
|
switch (irq->type) { |
|
case KVM_S390_PROGRAM_INT: |
|
if (s390int->parm & 0xffff0000) |
|
return -EINVAL; |
|
irq->u.pgm.code = s390int->parm; |
|
break; |
|
case KVM_S390_SIGP_SET_PREFIX: |
|
irq->u.prefix.address = s390int->parm; |
|
break; |
|
case KVM_S390_SIGP_STOP: |
|
irq->u.stop.flags = s390int->parm; |
|
break; |
|
case KVM_S390_INT_EXTERNAL_CALL: |
|
if (s390int->parm & 0xffff0000) |
|
return -EINVAL; |
|
irq->u.extcall.code = s390int->parm; |
|
break; |
|
case KVM_S390_INT_EMERGENCY: |
|
if (s390int->parm & 0xffff0000) |
|
return -EINVAL; |
|
irq->u.emerg.code = s390int->parm; |
|
break; |
|
case KVM_S390_MCHK: |
|
irq->u.mchk.mcic = s390int->parm64; |
|
break; |
|
case KVM_S390_INT_PFAULT_INIT: |
|
irq->u.ext.ext_params = s390int->parm; |
|
irq->u.ext.ext_params2 = s390int->parm64; |
|
break; |
|
case KVM_S390_RESTART: |
|
case KVM_S390_INT_CLOCK_COMP: |
|
case KVM_S390_INT_CPU_TIMER: |
|
break; |
|
default: |
|
return -EINVAL; |
|
} |
|
return 0; |
|
} |
|
|
|
int kvm_s390_is_stop_irq_pending(struct kvm_vcpu *vcpu) |
|
{ |
|
struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
|
|
|
return test_bit(IRQ_PEND_SIGP_STOP, &li->pending_irqs); |
|
} |
|
|
|
void kvm_s390_clear_stop_irq(struct kvm_vcpu *vcpu) |
|
{ |
|
struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
|
|
|
spin_lock(&li->lock); |
|
li->irq.stop.flags = 0; |
|
clear_bit(IRQ_PEND_SIGP_STOP, &li->pending_irqs); |
|
spin_unlock(&li->lock); |
|
} |
|
|
|
static int do_inject_vcpu(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq) |
|
{ |
|
int rc; |
|
|
|
switch (irq->type) { |
|
case KVM_S390_PROGRAM_INT: |
|
rc = __inject_prog(vcpu, irq); |
|
break; |
|
case KVM_S390_SIGP_SET_PREFIX: |
|
rc = __inject_set_prefix(vcpu, irq); |
|
break; |
|
case KVM_S390_SIGP_STOP: |
|
rc = __inject_sigp_stop(vcpu, irq); |
|
break; |
|
case KVM_S390_RESTART: |
|
rc = __inject_sigp_restart(vcpu); |
|
break; |
|
case KVM_S390_INT_CLOCK_COMP: |
|
rc = __inject_ckc(vcpu); |
|
break; |
|
case KVM_S390_INT_CPU_TIMER: |
|
rc = __inject_cpu_timer(vcpu); |
|
break; |
|
case KVM_S390_INT_EXTERNAL_CALL: |
|
rc = __inject_extcall(vcpu, irq); |
|
break; |
|
case KVM_S390_INT_EMERGENCY: |
|
rc = __inject_sigp_emergency(vcpu, irq); |
|
break; |
|
case KVM_S390_MCHK: |
|
rc = __inject_mchk(vcpu, irq); |
|
break; |
|
case KVM_S390_INT_PFAULT_INIT: |
|
rc = __inject_pfault_init(vcpu, irq); |
|
break; |
|
case KVM_S390_INT_VIRTIO: |
|
case KVM_S390_INT_SERVICE: |
|
case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX: |
|
default: |
|
rc = -EINVAL; |
|
} |
|
|
|
return rc; |
|
} |
|
|
|
int kvm_s390_inject_vcpu(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq) |
|
{ |
|
struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
|
int rc; |
|
|
|
spin_lock(&li->lock); |
|
rc = do_inject_vcpu(vcpu, irq); |
|
spin_unlock(&li->lock); |
|
if (!rc) |
|
kvm_s390_vcpu_wakeup(vcpu); |
|
return rc; |
|
} |
|
|
|
static inline void clear_irq_list(struct list_head *_list) |
|
{ |
|
struct kvm_s390_interrupt_info *inti, *n; |
|
|
|
list_for_each_entry_safe(inti, n, _list, list) { |
|
list_del(&inti->list); |
|
kfree(inti); |
|
} |
|
} |
|
|
|
static void inti_to_irq(struct kvm_s390_interrupt_info *inti, |
|
struct kvm_s390_irq *irq) |
|
{ |
|
irq->type = inti->type; |
|
switch (inti->type) { |
|
case KVM_S390_INT_PFAULT_INIT: |
|
case KVM_S390_INT_PFAULT_DONE: |
|
case KVM_S390_INT_VIRTIO: |
|
irq->u.ext = inti->ext; |
|
break; |
|
case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX: |
|
irq->u.io = inti->io; |
|
break; |
|
} |
|
} |
|
|
|
void kvm_s390_clear_float_irqs(struct kvm *kvm) |
|
{ |
|
struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int; |
|
int i; |
|
|
|
mutex_lock(&kvm->lock); |
|
if (!kvm_s390_pv_is_protected(kvm)) |
|
fi->masked_irqs = 0; |
|
mutex_unlock(&kvm->lock); |
|
spin_lock(&fi->lock); |
|
fi->pending_irqs = 0; |
|
memset(&fi->srv_signal, 0, sizeof(fi->srv_signal)); |
|
memset(&fi->mchk, 0, sizeof(fi->mchk)); |
|
for (i = 0; i < FIRQ_LIST_COUNT; i++) |
|
clear_irq_list(&fi->lists[i]); |
|
for (i = 0; i < FIRQ_MAX_COUNT; i++) |
|
fi->counters[i] = 0; |
|
spin_unlock(&fi->lock); |
|
kvm_s390_gisa_clear(kvm); |
|
}; |
|
|
|
static int get_all_floating_irqs(struct kvm *kvm, u8 __user *usrbuf, u64 len) |
|
{ |
|
struct kvm_s390_gisa_interrupt *gi = &kvm->arch.gisa_int; |
|
struct kvm_s390_interrupt_info *inti; |
|
struct kvm_s390_float_interrupt *fi; |
|
struct kvm_s390_irq *buf; |
|
struct kvm_s390_irq *irq; |
|
int max_irqs; |
|
int ret = 0; |
|
int n = 0; |
|
int i; |
|
|
|
if (len > KVM_S390_FLIC_MAX_BUFFER || len == 0) |
|
return -EINVAL; |
|
|
|
/* |
|
* We are already using -ENOMEM to signal |
|
* userspace it may retry with a bigger buffer, |
|
* so we need to use something else for this case |
|
*/ |
|
buf = vzalloc(len); |
|
if (!buf) |
|
return -ENOBUFS; |
|
|
|
max_irqs = len / sizeof(struct kvm_s390_irq); |
|
|
|
if (gi->origin && gisa_get_ipm(gi->origin)) { |
|
for (i = 0; i <= MAX_ISC; i++) { |
|
if (n == max_irqs) { |
|
/* signal userspace to try again */ |
|
ret = -ENOMEM; |
|
goto out_nolock; |
|
} |
|
if (gisa_tac_ipm_gisc(gi->origin, i)) { |
|
irq = (struct kvm_s390_irq *) &buf[n]; |
|
irq->type = KVM_S390_INT_IO(1, 0, 0, 0); |
|
irq->u.io.io_int_word = isc_to_int_word(i); |
|
n++; |
|
} |
|
} |
|
} |
|
fi = &kvm->arch.float_int; |
|
spin_lock(&fi->lock); |
|
for (i = 0; i < FIRQ_LIST_COUNT; i++) { |
|
list_for_each_entry(inti, &fi->lists[i], list) { |
|
if (n == max_irqs) { |
|
/* signal userspace to try again */ |
|
ret = -ENOMEM; |
|
goto out; |
|
} |
|
inti_to_irq(inti, &buf[n]); |
|
n++; |
|
} |
|
} |
|
if (test_bit(IRQ_PEND_EXT_SERVICE, &fi->pending_irqs) || |
|
test_bit(IRQ_PEND_EXT_SERVICE_EV, &fi->pending_irqs)) { |
|
if (n == max_irqs) { |
|
/* signal userspace to try again */ |
|
ret = -ENOMEM; |
|
goto out; |
|
} |
|
irq = (struct kvm_s390_irq *) &buf[n]; |
|
irq->type = KVM_S390_INT_SERVICE; |
|
irq->u.ext = fi->srv_signal; |
|
n++; |
|
} |
|
if (test_bit(IRQ_PEND_MCHK_REP, &fi->pending_irqs)) { |
|
if (n == max_irqs) { |
|
/* signal userspace to try again */ |
|
ret = -ENOMEM; |
|
goto out; |
|
} |
|
irq = (struct kvm_s390_irq *) &buf[n]; |
|
irq->type = KVM_S390_MCHK; |
|
irq->u.mchk = fi->mchk; |
|
n++; |
|
} |
|
|
|
out: |
|
spin_unlock(&fi->lock); |
|
out_nolock: |
|
if (!ret && n > 0) { |
|
if (copy_to_user(usrbuf, buf, sizeof(struct kvm_s390_irq) * n)) |
|
ret = -EFAULT; |
|
} |
|
vfree(buf); |
|
|
|
return ret < 0 ? ret : n; |
|
} |
|
|
|
static int flic_ais_mode_get_all(struct kvm *kvm, struct kvm_device_attr *attr) |
|
{ |
|
struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int; |
|
struct kvm_s390_ais_all ais; |
|
|
|
if (attr->attr < sizeof(ais)) |
|
return -EINVAL; |
|
|
|
if (!test_kvm_facility(kvm, 72)) |
|
return -EOPNOTSUPP; |
|
|
|
mutex_lock(&fi->ais_lock); |
|
ais.simm = fi->simm; |
|
ais.nimm = fi->nimm; |
|
mutex_unlock(&fi->ais_lock); |
|
|
|
if (copy_to_user((void __user *)attr->addr, &ais, sizeof(ais))) |
|
return -EFAULT; |
|
|
|
return 0; |
|
} |
|
|
|
static int flic_get_attr(struct kvm_device *dev, struct kvm_device_attr *attr) |
|
{ |
|
int r; |
|
|
|
switch (attr->group) { |
|
case KVM_DEV_FLIC_GET_ALL_IRQS: |
|
r = get_all_floating_irqs(dev->kvm, (u8 __user *) attr->addr, |
|
attr->attr); |
|
break; |
|
case KVM_DEV_FLIC_AISM_ALL: |
|
r = flic_ais_mode_get_all(dev->kvm, attr); |
|
break; |
|
default: |
|
r = -EINVAL; |
|
} |
|
|
|
return r; |
|
} |
|
|
|
static inline int copy_irq_from_user(struct kvm_s390_interrupt_info *inti, |
|
u64 addr) |
|
{ |
|
struct kvm_s390_irq __user *uptr = (struct kvm_s390_irq __user *) addr; |
|
void *target = NULL; |
|
void __user *source; |
|
u64 size; |
|
|
|
if (get_user(inti->type, (u64 __user *)addr)) |
|
return -EFAULT; |
|
|
|
switch (inti->type) { |
|
case KVM_S390_INT_PFAULT_INIT: |
|
case KVM_S390_INT_PFAULT_DONE: |
|
case KVM_S390_INT_VIRTIO: |
|
case KVM_S390_INT_SERVICE: |
|
target = (void *) &inti->ext; |
|
source = &uptr->u.ext; |
|
size = sizeof(inti->ext); |
|
break; |
|
case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX: |
|
target = (void *) &inti->io; |
|
source = &uptr->u.io; |
|
size = sizeof(inti->io); |
|
break; |
|
case KVM_S390_MCHK: |
|
target = (void *) &inti->mchk; |
|
source = &uptr->u.mchk; |
|
size = sizeof(inti->mchk); |
|
break; |
|
default: |
|
return -EINVAL; |
|
} |
|
|
|
if (copy_from_user(target, source, size)) |
|
return -EFAULT; |
|
|
|
return 0; |
|
} |
|
|
|
static int enqueue_floating_irq(struct kvm_device *dev, |
|
struct kvm_device_attr *attr) |
|
{ |
|
struct kvm_s390_interrupt_info *inti = NULL; |
|
int r = 0; |
|
int len = attr->attr; |
|
|
|
if (len % sizeof(struct kvm_s390_irq) != 0) |
|
return -EINVAL; |
|
else if (len > KVM_S390_FLIC_MAX_BUFFER) |
|
return -EINVAL; |
|
|
|
while (len >= sizeof(struct kvm_s390_irq)) { |
|
inti = kzalloc(sizeof(*inti), GFP_KERNEL_ACCOUNT); |
|
if (!inti) |
|
return -ENOMEM; |
|
|
|
r = copy_irq_from_user(inti, attr->addr); |
|
if (r) { |
|
kfree(inti); |
|
return r; |
|
} |
|
r = __inject_vm(dev->kvm, inti); |
|
if (r) { |
|
kfree(inti); |
|
return r; |
|
} |
|
len -= sizeof(struct kvm_s390_irq); |
|
attr->addr += sizeof(struct kvm_s390_irq); |
|
} |
|
|
|
return r; |
|
} |
|
|
|
static struct s390_io_adapter *get_io_adapter(struct kvm *kvm, unsigned int id) |
|
{ |
|
if (id >= MAX_S390_IO_ADAPTERS) |
|
return NULL; |
|
id = array_index_nospec(id, MAX_S390_IO_ADAPTERS); |
|
return kvm->arch.adapters[id]; |
|
} |
|
|
|
static int register_io_adapter(struct kvm_device *dev, |
|
struct kvm_device_attr *attr) |
|
{ |
|
struct s390_io_adapter *adapter; |
|
struct kvm_s390_io_adapter adapter_info; |
|
|
|
if (copy_from_user(&adapter_info, |
|
(void __user *)attr->addr, sizeof(adapter_info))) |
|
return -EFAULT; |
|
|
|
if (adapter_info.id >= MAX_S390_IO_ADAPTERS) |
|
return -EINVAL; |
|
|
|
adapter_info.id = array_index_nospec(adapter_info.id, |
|
MAX_S390_IO_ADAPTERS); |
|
|
|
if (dev->kvm->arch.adapters[adapter_info.id] != NULL) |
|
return -EINVAL; |
|
|
|
adapter = kzalloc(sizeof(*adapter), GFP_KERNEL_ACCOUNT); |
|
if (!adapter) |
|
return -ENOMEM; |
|
|
|
adapter->id = adapter_info.id; |
|
adapter->isc = adapter_info.isc; |
|
adapter->maskable = adapter_info.maskable; |
|
adapter->masked = false; |
|
adapter->swap = adapter_info.swap; |
|
adapter->suppressible = (adapter_info.flags) & |
|
KVM_S390_ADAPTER_SUPPRESSIBLE; |
|
dev->kvm->arch.adapters[adapter->id] = adapter; |
|
|
|
return 0; |
|
} |
|
|
|
int kvm_s390_mask_adapter(struct kvm *kvm, unsigned int id, bool masked) |
|
{ |
|
int ret; |
|
struct s390_io_adapter *adapter = get_io_adapter(kvm, id); |
|
|
|
if (!adapter || !adapter->maskable) |
|
return -EINVAL; |
|
ret = adapter->masked; |
|
adapter->masked = masked; |
|
return ret; |
|
} |
|
|
|
void kvm_s390_destroy_adapters(struct kvm *kvm) |
|
{ |
|
int i; |
|
|
|
for (i = 0; i < MAX_S390_IO_ADAPTERS; i++) |
|
kfree(kvm->arch.adapters[i]); |
|
} |
|
|
|
static int modify_io_adapter(struct kvm_device *dev, |
|
struct kvm_device_attr *attr) |
|
{ |
|
struct kvm_s390_io_adapter_req req; |
|
struct s390_io_adapter *adapter; |
|
int ret; |
|
|
|
if (copy_from_user(&req, (void __user *)attr->addr, sizeof(req))) |
|
return -EFAULT; |
|
|
|
adapter = get_io_adapter(dev->kvm, req.id); |
|
if (!adapter) |
|
return -EINVAL; |
|
switch (req.type) { |
|
case KVM_S390_IO_ADAPTER_MASK: |
|
ret = kvm_s390_mask_adapter(dev->kvm, req.id, req.mask); |
|
if (ret > 0) |
|
ret = 0; |
|
break; |
|
/* |
|
* The following operations are no longer needed and therefore no-ops. |
|
* The gpa to hva translation is done when an IRQ route is set up. The |
|
* set_irq code uses get_user_pages_remote() to do the actual write. |
|
*/ |
|
case KVM_S390_IO_ADAPTER_MAP: |
|
case KVM_S390_IO_ADAPTER_UNMAP: |
|
ret = 0; |
|
break; |
|
default: |
|
ret = -EINVAL; |
|
} |
|
|
|
return ret; |
|
} |
|
|
|
static int clear_io_irq(struct kvm *kvm, struct kvm_device_attr *attr) |
|
|
|
{ |
|
const u64 isc_mask = 0xffUL << 24; /* all iscs set */ |
|
u32 schid; |
|
|
|
if (attr->flags) |
|
return -EINVAL; |
|
if (attr->attr != sizeof(schid)) |
|
return -EINVAL; |
|
if (copy_from_user(&schid, (void __user *) attr->addr, sizeof(schid))) |
|
return -EFAULT; |
|
if (!schid) |
|
return -EINVAL; |
|
kfree(kvm_s390_get_io_int(kvm, isc_mask, schid)); |
|
/* |
|
* If userspace is conforming to the architecture, we can have at most |
|
* one pending I/O interrupt per subchannel, so this is effectively a |
|
* clear all. |
|
*/ |
|
return 0; |
|
} |
|
|
|
static int modify_ais_mode(struct kvm *kvm, struct kvm_device_attr *attr) |
|
{ |
|
struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int; |
|
struct kvm_s390_ais_req req; |
|
int ret = 0; |
|
|
|
if (!test_kvm_facility(kvm, 72)) |
|
return -EOPNOTSUPP; |
|
|
|
if (copy_from_user(&req, (void __user *)attr->addr, sizeof(req))) |
|
return -EFAULT; |
|
|
|
if (req.isc > MAX_ISC) |
|
return -EINVAL; |
|
|
|
trace_kvm_s390_modify_ais_mode(req.isc, |
|
(fi->simm & AIS_MODE_MASK(req.isc)) ? |
|
(fi->nimm & AIS_MODE_MASK(req.isc)) ? |
|
2 : KVM_S390_AIS_MODE_SINGLE : |
|
KVM_S390_AIS_MODE_ALL, req.mode); |
|
|
|
mutex_lock(&fi->ais_lock); |
|
switch (req.mode) { |
|
case KVM_S390_AIS_MODE_ALL: |
|
fi->simm &= ~AIS_MODE_MASK(req.isc); |
|
fi->nimm &= ~AIS_MODE_MASK(req.isc); |
|
break; |
|
case KVM_S390_AIS_MODE_SINGLE: |
|
fi->simm |= AIS_MODE_MASK(req.isc); |
|
fi->nimm &= ~AIS_MODE_MASK(req.isc); |
|
break; |
|
default: |
|
ret = -EINVAL; |
|
} |
|
mutex_unlock(&fi->ais_lock); |
|
|
|
return ret; |
|
} |
|
|
|
static int kvm_s390_inject_airq(struct kvm *kvm, |
|
struct s390_io_adapter *adapter) |
|
{ |
|
struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int; |
|
struct kvm_s390_interrupt s390int = { |
|
.type = KVM_S390_INT_IO(1, 0, 0, 0), |
|
.parm = 0, |
|
.parm64 = isc_to_int_word(adapter->isc), |
|
}; |
|
int ret = 0; |
|
|
|
if (!test_kvm_facility(kvm, 72) || !adapter->suppressible) |
|
return kvm_s390_inject_vm(kvm, &s390int); |
|
|
|
mutex_lock(&fi->ais_lock); |
|
if (fi->nimm & AIS_MODE_MASK(adapter->isc)) { |
|
trace_kvm_s390_airq_suppressed(adapter->id, adapter->isc); |
|
goto out; |
|
} |
|
|
|
ret = kvm_s390_inject_vm(kvm, &s390int); |
|
if (!ret && (fi->simm & AIS_MODE_MASK(adapter->isc))) { |
|
fi->nimm |= AIS_MODE_MASK(adapter->isc); |
|
trace_kvm_s390_modify_ais_mode(adapter->isc, |
|
KVM_S390_AIS_MODE_SINGLE, 2); |
|
} |
|
out: |
|
mutex_unlock(&fi->ais_lock); |
|
return ret; |
|
} |
|
|
|
static int flic_inject_airq(struct kvm *kvm, struct kvm_device_attr *attr) |
|
{ |
|
unsigned int id = attr->attr; |
|
struct s390_io_adapter *adapter = get_io_adapter(kvm, id); |
|
|
|
if (!adapter) |
|
return -EINVAL; |
|
|
|
return kvm_s390_inject_airq(kvm, adapter); |
|
} |
|
|
|
static int flic_ais_mode_set_all(struct kvm *kvm, struct kvm_device_attr *attr) |
|
{ |
|
struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int; |
|
struct kvm_s390_ais_all ais; |
|
|
|
if (!test_kvm_facility(kvm, 72)) |
|
return -EOPNOTSUPP; |
|
|
|
if (copy_from_user(&ais, (void __user *)attr->addr, sizeof(ais))) |
|
return -EFAULT; |
|
|
|
mutex_lock(&fi->ais_lock); |
|
fi->simm = ais.simm; |
|
fi->nimm = ais.nimm; |
|
mutex_unlock(&fi->ais_lock); |
|
|
|
return 0; |
|
} |
|
|
|
static int flic_set_attr(struct kvm_device *dev, struct kvm_device_attr *attr) |
|
{ |
|
int r = 0; |
|
unsigned int i; |
|
struct kvm_vcpu *vcpu; |
|
|
|
switch (attr->group) { |
|
case KVM_DEV_FLIC_ENQUEUE: |
|
r = enqueue_floating_irq(dev, attr); |
|
break; |
|
case KVM_DEV_FLIC_CLEAR_IRQS: |
|
kvm_s390_clear_float_irqs(dev->kvm); |
|
break; |
|
case KVM_DEV_FLIC_APF_ENABLE: |
|
dev->kvm->arch.gmap->pfault_enabled = 1; |
|
break; |
|
case KVM_DEV_FLIC_APF_DISABLE_WAIT: |
|
dev->kvm->arch.gmap->pfault_enabled = 0; |
|
/* |
|
* Make sure no async faults are in transition when |
|
* clearing the queues. So we don't need to worry |
|
* about late coming workers. |
|
*/ |
|
synchronize_srcu(&dev->kvm->srcu); |
|
kvm_for_each_vcpu(i, vcpu, dev->kvm) |
|
kvm_clear_async_pf_completion_queue(vcpu); |
|
break; |
|
case KVM_DEV_FLIC_ADAPTER_REGISTER: |
|
r = register_io_adapter(dev, attr); |
|
break; |
|
case KVM_DEV_FLIC_ADAPTER_MODIFY: |
|
r = modify_io_adapter(dev, attr); |
|
break; |
|
case KVM_DEV_FLIC_CLEAR_IO_IRQ: |
|
r = clear_io_irq(dev->kvm, attr); |
|
break; |
|
case KVM_DEV_FLIC_AISM: |
|
r = modify_ais_mode(dev->kvm, attr); |
|
break; |
|
case KVM_DEV_FLIC_AIRQ_INJECT: |
|
r = flic_inject_airq(dev->kvm, attr); |
|
break; |
|
case KVM_DEV_FLIC_AISM_ALL: |
|
r = flic_ais_mode_set_all(dev->kvm, attr); |
|
break; |
|
default: |
|
r = -EINVAL; |
|
} |
|
|
|
return r; |
|
} |
|
|
|
static int flic_has_attr(struct kvm_device *dev, |
|
struct kvm_device_attr *attr) |
|
{ |
|
switch (attr->group) { |
|
case KVM_DEV_FLIC_GET_ALL_IRQS: |
|
case KVM_DEV_FLIC_ENQUEUE: |
|
case KVM_DEV_FLIC_CLEAR_IRQS: |
|
case KVM_DEV_FLIC_APF_ENABLE: |
|
case KVM_DEV_FLIC_APF_DISABLE_WAIT: |
|
case KVM_DEV_FLIC_ADAPTER_REGISTER: |
|
case KVM_DEV_FLIC_ADAPTER_MODIFY: |
|
case KVM_DEV_FLIC_CLEAR_IO_IRQ: |
|
case KVM_DEV_FLIC_AISM: |
|
case KVM_DEV_FLIC_AIRQ_INJECT: |
|
case KVM_DEV_FLIC_AISM_ALL: |
|
return 0; |
|
} |
|
return -ENXIO; |
|
} |
|
|
|
static int flic_create(struct kvm_device *dev, u32 type) |
|
{ |
|
if (!dev) |
|
return -EINVAL; |
|
if (dev->kvm->arch.flic) |
|
return -EINVAL; |
|
dev->kvm->arch.flic = dev; |
|
return 0; |
|
} |
|
|
|
static void flic_destroy(struct kvm_device *dev) |
|
{ |
|
dev->kvm->arch.flic = NULL; |
|
kfree(dev); |
|
} |
|
|
|
/* s390 floating irq controller (flic) */ |
|
struct kvm_device_ops kvm_flic_ops = { |
|
.name = "kvm-flic", |
|
.get_attr = flic_get_attr, |
|
.set_attr = flic_set_attr, |
|
.has_attr = flic_has_attr, |
|
.create = flic_create, |
|
.destroy = flic_destroy, |
|
}; |
|
|
|
static unsigned long get_ind_bit(__u64 addr, unsigned long bit_nr, bool swap) |
|
{ |
|
unsigned long bit; |
|
|
|
bit = bit_nr + (addr % PAGE_SIZE) * 8; |
|
|
|
return swap ? (bit ^ (BITS_PER_LONG - 1)) : bit; |
|
} |
|
|
|
static struct page *get_map_page(struct kvm *kvm, u64 uaddr) |
|
{ |
|
struct page *page = NULL; |
|
|
|
mmap_read_lock(kvm->mm); |
|
get_user_pages_remote(kvm->mm, uaddr, 1, FOLL_WRITE, |
|
&page, NULL, NULL); |
|
mmap_read_unlock(kvm->mm); |
|
return page; |
|
} |
|
|
|
static int adapter_indicators_set(struct kvm *kvm, |
|
struct s390_io_adapter *adapter, |
|
struct kvm_s390_adapter_int *adapter_int) |
|
{ |
|
unsigned long bit; |
|
int summary_set, idx; |
|
struct page *ind_page, *summary_page; |
|
void *map; |
|
|
|
ind_page = get_map_page(kvm, adapter_int->ind_addr); |
|
if (!ind_page) |
|
return -1; |
|
summary_page = get_map_page(kvm, adapter_int->summary_addr); |
|
if (!summary_page) { |
|
put_page(ind_page); |
|
return -1; |
|
} |
|
|
|
idx = srcu_read_lock(&kvm->srcu); |
|
map = page_address(ind_page); |
|
bit = get_ind_bit(adapter_int->ind_addr, |
|
adapter_int->ind_offset, adapter->swap); |
|
set_bit(bit, map); |
|
mark_page_dirty(kvm, adapter_int->ind_addr >> PAGE_SHIFT); |
|
set_page_dirty_lock(ind_page); |
|
map = page_address(summary_page); |
|
bit = get_ind_bit(adapter_int->summary_addr, |
|
adapter_int->summary_offset, adapter->swap); |
|
summary_set = test_and_set_bit(bit, map); |
|
mark_page_dirty(kvm, adapter_int->summary_addr >> PAGE_SHIFT); |
|
set_page_dirty_lock(summary_page); |
|
srcu_read_unlock(&kvm->srcu, idx); |
|
|
|
put_page(ind_page); |
|
put_page(summary_page); |
|
return summary_set ? 0 : 1; |
|
} |
|
|
|
/* |
|
* < 0 - not injected due to error |
|
* = 0 - coalesced, summary indicator already active |
|
* > 0 - injected interrupt |
|
*/ |
|
static int set_adapter_int(struct kvm_kernel_irq_routing_entry *e, |
|
struct kvm *kvm, int irq_source_id, int level, |
|
bool line_status) |
|
{ |
|
int ret; |
|
struct s390_io_adapter *adapter; |
|
|
|
/* We're only interested in the 0->1 transition. */ |
|
if (!level) |
|
return 0; |
|
adapter = get_io_adapter(kvm, e->adapter.adapter_id); |
|
if (!adapter) |
|
return -1; |
|
ret = adapter_indicators_set(kvm, adapter, &e->adapter); |
|
if ((ret > 0) && !adapter->masked) { |
|
ret = kvm_s390_inject_airq(kvm, adapter); |
|
if (ret == 0) |
|
ret = 1; |
|
} |
|
return ret; |
|
} |
|
|
|
/* |
|
* Inject the machine check to the guest. |
|
*/ |
|
void kvm_s390_reinject_machine_check(struct kvm_vcpu *vcpu, |
|
struct mcck_volatile_info *mcck_info) |
|
{ |
|
struct kvm_s390_interrupt_info inti; |
|
struct kvm_s390_irq irq; |
|
struct kvm_s390_mchk_info *mchk; |
|
union mci mci; |
|
__u64 cr14 = 0; /* upper bits are not used */ |
|
int rc; |
|
|
|
mci.val = mcck_info->mcic; |
|
if (mci.sr) |
|
cr14 |= CR14_RECOVERY_SUBMASK; |
|
if (mci.dg) |
|
cr14 |= CR14_DEGRADATION_SUBMASK; |
|
if (mci.w) |
|
cr14 |= CR14_WARNING_SUBMASK; |
|
|
|
mchk = mci.ck ? &inti.mchk : &irq.u.mchk; |
|
mchk->cr14 = cr14; |
|
mchk->mcic = mcck_info->mcic; |
|
mchk->ext_damage_code = mcck_info->ext_damage_code; |
|
mchk->failing_storage_address = mcck_info->failing_storage_address; |
|
if (mci.ck) { |
|
/* Inject the floating machine check */ |
|
inti.type = KVM_S390_MCHK; |
|
rc = __inject_vm(vcpu->kvm, &inti); |
|
} else { |
|
/* Inject the machine check to specified vcpu */ |
|
irq.type = KVM_S390_MCHK; |
|
rc = kvm_s390_inject_vcpu(vcpu, &irq); |
|
} |
|
WARN_ON_ONCE(rc); |
|
} |
|
|
|
int kvm_set_routing_entry(struct kvm *kvm, |
|
struct kvm_kernel_irq_routing_entry *e, |
|
const struct kvm_irq_routing_entry *ue) |
|
{ |
|
u64 uaddr; |
|
|
|
switch (ue->type) { |
|
/* we store the userspace addresses instead of the guest addresses */ |
|
case KVM_IRQ_ROUTING_S390_ADAPTER: |
|
e->set = set_adapter_int; |
|
uaddr = gmap_translate(kvm->arch.gmap, ue->u.adapter.summary_addr); |
|
if (uaddr == -EFAULT) |
|
return -EFAULT; |
|
e->adapter.summary_addr = uaddr; |
|
uaddr = gmap_translate(kvm->arch.gmap, ue->u.adapter.ind_addr); |
|
if (uaddr == -EFAULT) |
|
return -EFAULT; |
|
e->adapter.ind_addr = uaddr; |
|
e->adapter.summary_offset = ue->u.adapter.summary_offset; |
|
e->adapter.ind_offset = ue->u.adapter.ind_offset; |
|
e->adapter.adapter_id = ue->u.adapter.adapter_id; |
|
return 0; |
|
default: |
|
return -EINVAL; |
|
} |
|
} |
|
|
|
int kvm_set_msi(struct kvm_kernel_irq_routing_entry *e, struct kvm *kvm, |
|
int irq_source_id, int level, bool line_status) |
|
{ |
|
return -EINVAL; |
|
} |
|
|
|
int kvm_s390_set_irq_state(struct kvm_vcpu *vcpu, void __user *irqstate, int len) |
|
{ |
|
struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
|
struct kvm_s390_irq *buf; |
|
int r = 0; |
|
int n; |
|
|
|
buf = vmalloc(len); |
|
if (!buf) |
|
return -ENOMEM; |
|
|
|
if (copy_from_user((void *) buf, irqstate, len)) { |
|
r = -EFAULT; |
|
goto out_free; |
|
} |
|
|
|
/* |
|
* Don't allow setting the interrupt state |
|
* when there are already interrupts pending |
|
*/ |
|
spin_lock(&li->lock); |
|
if (li->pending_irqs) { |
|
r = -EBUSY; |
|
goto out_unlock; |
|
} |
|
|
|
for (n = 0; n < len / sizeof(*buf); n++) { |
|
r = do_inject_vcpu(vcpu, &buf[n]); |
|
if (r) |
|
break; |
|
} |
|
|
|
out_unlock: |
|
spin_unlock(&li->lock); |
|
out_free: |
|
vfree(buf); |
|
|
|
return r; |
|
} |
|
|
|
static void store_local_irq(struct kvm_s390_local_interrupt *li, |
|
struct kvm_s390_irq *irq, |
|
unsigned long irq_type) |
|
{ |
|
switch (irq_type) { |
|
case IRQ_PEND_MCHK_EX: |
|
case IRQ_PEND_MCHK_REP: |
|
irq->type = KVM_S390_MCHK; |
|
irq->u.mchk = li->irq.mchk; |
|
break; |
|
case IRQ_PEND_PROG: |
|
irq->type = KVM_S390_PROGRAM_INT; |
|
irq->u.pgm = li->irq.pgm; |
|
break; |
|
case IRQ_PEND_PFAULT_INIT: |
|
irq->type = KVM_S390_INT_PFAULT_INIT; |
|
irq->u.ext = li->irq.ext; |
|
break; |
|
case IRQ_PEND_EXT_EXTERNAL: |
|
irq->type = KVM_S390_INT_EXTERNAL_CALL; |
|
irq->u.extcall = li->irq.extcall; |
|
break; |
|
case IRQ_PEND_EXT_CLOCK_COMP: |
|
irq->type = KVM_S390_INT_CLOCK_COMP; |
|
break; |
|
case IRQ_PEND_EXT_CPU_TIMER: |
|
irq->type = KVM_S390_INT_CPU_TIMER; |
|
break; |
|
case IRQ_PEND_SIGP_STOP: |
|
irq->type = KVM_S390_SIGP_STOP; |
|
irq->u.stop = li->irq.stop; |
|
break; |
|
case IRQ_PEND_RESTART: |
|
irq->type = KVM_S390_RESTART; |
|
break; |
|
case IRQ_PEND_SET_PREFIX: |
|
irq->type = KVM_S390_SIGP_SET_PREFIX; |
|
irq->u.prefix = li->irq.prefix; |
|
break; |
|
} |
|
} |
|
|
|
int kvm_s390_get_irq_state(struct kvm_vcpu *vcpu, __u8 __user *buf, int len) |
|
{ |
|
int scn; |
|
DECLARE_BITMAP(sigp_emerg_pending, KVM_MAX_VCPUS); |
|
struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int; |
|
unsigned long pending_irqs; |
|
struct kvm_s390_irq irq; |
|
unsigned long irq_type; |
|
int cpuaddr; |
|
int n = 0; |
|
|
|
spin_lock(&li->lock); |
|
pending_irqs = li->pending_irqs; |
|
memcpy(&sigp_emerg_pending, &li->sigp_emerg_pending, |
|
sizeof(sigp_emerg_pending)); |
|
spin_unlock(&li->lock); |
|
|
|
for_each_set_bit(irq_type, &pending_irqs, IRQ_PEND_COUNT) { |
|
memset(&irq, 0, sizeof(irq)); |
|
if (irq_type == IRQ_PEND_EXT_EMERGENCY) |
|
continue; |
|
if (n + sizeof(irq) > len) |
|
return -ENOBUFS; |
|
store_local_irq(&vcpu->arch.local_int, &irq, irq_type); |
|
if (copy_to_user(&buf[n], &irq, sizeof(irq))) |
|
return -EFAULT; |
|
n += sizeof(irq); |
|
} |
|
|
|
if (test_bit(IRQ_PEND_EXT_EMERGENCY, &pending_irqs)) { |
|
for_each_set_bit(cpuaddr, sigp_emerg_pending, KVM_MAX_VCPUS) { |
|
memset(&irq, 0, sizeof(irq)); |
|
if (n + sizeof(irq) > len) |
|
return -ENOBUFS; |
|
irq.type = KVM_S390_INT_EMERGENCY; |
|
irq.u.emerg.code = cpuaddr; |
|
if (copy_to_user(&buf[n], &irq, sizeof(irq))) |
|
return -EFAULT; |
|
n += sizeof(irq); |
|
} |
|
} |
|
|
|
if (sca_ext_call_pending(vcpu, &scn)) { |
|
if (n + sizeof(irq) > len) |
|
return -ENOBUFS; |
|
memset(&irq, 0, sizeof(irq)); |
|
irq.type = KVM_S390_INT_EXTERNAL_CALL; |
|
irq.u.extcall.code = scn; |
|
if (copy_to_user(&buf[n], &irq, sizeof(irq))) |
|
return -EFAULT; |
|
n += sizeof(irq); |
|
} |
|
|
|
return n; |
|
} |
|
|
|
static void __airqs_kick_single_vcpu(struct kvm *kvm, u8 deliverable_mask) |
|
{ |
|
int vcpu_id, online_vcpus = atomic_read(&kvm->online_vcpus); |
|
struct kvm_s390_gisa_interrupt *gi = &kvm->arch.gisa_int; |
|
struct kvm_vcpu *vcpu; |
|
|
|
for_each_set_bit(vcpu_id, kvm->arch.idle_mask, online_vcpus) { |
|
vcpu = kvm_get_vcpu(kvm, vcpu_id); |
|
if (psw_ioint_disabled(vcpu)) |
|
continue; |
|
deliverable_mask &= (u8)(vcpu->arch.sie_block->gcr[6] >> 24); |
|
if (deliverable_mask) { |
|
/* lately kicked but not yet running */ |
|
if (test_and_set_bit(vcpu_id, gi->kicked_mask)) |
|
return; |
|
kvm_s390_vcpu_wakeup(vcpu); |
|
return; |
|
} |
|
} |
|
} |
|
|
|
static enum hrtimer_restart gisa_vcpu_kicker(struct hrtimer *timer) |
|
{ |
|
struct kvm_s390_gisa_interrupt *gi = |
|
container_of(timer, struct kvm_s390_gisa_interrupt, timer); |
|
struct kvm *kvm = |
|
container_of(gi->origin, struct sie_page2, gisa)->kvm; |
|
u8 pending_mask; |
|
|
|
pending_mask = gisa_get_ipm_or_restore_iam(gi); |
|
if (pending_mask) { |
|
__airqs_kick_single_vcpu(kvm, pending_mask); |
|
hrtimer_forward_now(timer, ns_to_ktime(gi->expires)); |
|
return HRTIMER_RESTART; |
|
} |
|
|
|
return HRTIMER_NORESTART; |
|
} |
|
|
|
#define NULL_GISA_ADDR 0x00000000UL |
|
#define NONE_GISA_ADDR 0x00000001UL |
|
#define GISA_ADDR_MASK 0xfffff000UL |
|
|
|
static void process_gib_alert_list(void) |
|
{ |
|
struct kvm_s390_gisa_interrupt *gi; |
|
struct kvm_s390_gisa *gisa; |
|
struct kvm *kvm; |
|
u32 final, origin = 0UL; |
|
|
|
do { |
|
/* |
|
* If the NONE_GISA_ADDR is still stored in the alert list |
|
* origin, we will leave the outer loop. No further GISA has |
|
* been added to the alert list by millicode while processing |
|
* the current alert list. |
|
*/ |
|
final = (origin & NONE_GISA_ADDR); |
|
/* |
|
* Cut off the alert list and store the NONE_GISA_ADDR in the |
|
* alert list origin to avoid further GAL interruptions. |
|
* A new alert list can be build up by millicode in parallel |
|
* for guests not in the yet cut-off alert list. When in the |
|
* final loop, store the NULL_GISA_ADDR instead. This will re- |
|
* enable GAL interruptions on the host again. |
|
*/ |
|
origin = xchg(&gib->alert_list_origin, |
|
(!final) ? NONE_GISA_ADDR : NULL_GISA_ADDR); |
|
/* |
|
* Loop through the just cut-off alert list and start the |
|
* gisa timers to kick idle vcpus to consume the pending |
|
* interruptions asap. |
|
*/ |
|
while (origin & GISA_ADDR_MASK) { |
|
gisa = (struct kvm_s390_gisa *)(u64)origin; |
|
origin = gisa->next_alert; |
|
gisa->next_alert = (u32)(u64)gisa; |
|
kvm = container_of(gisa, struct sie_page2, gisa)->kvm; |
|
gi = &kvm->arch.gisa_int; |
|
if (hrtimer_active(&gi->timer)) |
|
hrtimer_cancel(&gi->timer); |
|
hrtimer_start(&gi->timer, 0, HRTIMER_MODE_REL); |
|
} |
|
} while (!final); |
|
|
|
} |
|
|
|
void kvm_s390_gisa_clear(struct kvm *kvm) |
|
{ |
|
struct kvm_s390_gisa_interrupt *gi = &kvm->arch.gisa_int; |
|
|
|
if (!gi->origin) |
|
return; |
|
gisa_clear_ipm(gi->origin); |
|
VM_EVENT(kvm, 3, "gisa 0x%pK cleared", gi->origin); |
|
} |
|
|
|
void kvm_s390_gisa_init(struct kvm *kvm) |
|
{ |
|
struct kvm_s390_gisa_interrupt *gi = &kvm->arch.gisa_int; |
|
|
|
if (!css_general_characteristics.aiv) |
|
return; |
|
gi->origin = &kvm->arch.sie_page2->gisa; |
|
gi->alert.mask = 0; |
|
spin_lock_init(&gi->alert.ref_lock); |
|
gi->expires = 50 * 1000; /* 50 usec */ |
|
hrtimer_init(&gi->timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL); |
|
gi->timer.function = gisa_vcpu_kicker; |
|
memset(gi->origin, 0, sizeof(struct kvm_s390_gisa)); |
|
gi->origin->next_alert = (u32)(u64)gi->origin; |
|
VM_EVENT(kvm, 3, "gisa 0x%pK initialized", gi->origin); |
|
} |
|
|
|
void kvm_s390_gisa_destroy(struct kvm *kvm) |
|
{ |
|
struct kvm_s390_gisa_interrupt *gi = &kvm->arch.gisa_int; |
|
|
|
if (!gi->origin) |
|
return; |
|
if (gi->alert.mask) |
|
KVM_EVENT(3, "vm 0x%pK has unexpected iam 0x%02x", |
|
kvm, gi->alert.mask); |
|
while (gisa_in_alert_list(gi->origin)) |
|
cpu_relax(); |
|
hrtimer_cancel(&gi->timer); |
|
gi->origin = NULL; |
|
} |
|
|
|
/** |
|
* kvm_s390_gisc_register - register a guest ISC |
|
* |
|
* @kvm: the kernel vm to work with |
|
* @gisc: the guest interruption sub class to register |
|
* |
|
* The function extends the vm specific alert mask to use. |
|
* The effective IAM mask in the GISA is updated as well |
|
* in case the GISA is not part of the GIB alert list. |
|
* It will be updated latest when the IAM gets restored |
|
* by gisa_get_ipm_or_restore_iam(). |
|
* |
|
* Returns: the nonspecific ISC (NISC) the gib alert mechanism |
|
* has registered with the channel subsystem. |
|
* -ENODEV in case the vm uses no GISA |
|
* -ERANGE in case the guest ISC is invalid |
|
*/ |
|
int kvm_s390_gisc_register(struct kvm *kvm, u32 gisc) |
|
{ |
|
struct kvm_s390_gisa_interrupt *gi = &kvm->arch.gisa_int; |
|
|
|
if (!gi->origin) |
|
return -ENODEV; |
|
if (gisc > MAX_ISC) |
|
return -ERANGE; |
|
|
|
spin_lock(&gi->alert.ref_lock); |
|
gi->alert.ref_count[gisc]++; |
|
if (gi->alert.ref_count[gisc] == 1) { |
|
gi->alert.mask |= 0x80 >> gisc; |
|
gisa_set_iam(gi->origin, gi->alert.mask); |
|
} |
|
spin_unlock(&gi->alert.ref_lock); |
|
|
|
return gib->nisc; |
|
} |
|
EXPORT_SYMBOL_GPL(kvm_s390_gisc_register); |
|
|
|
/** |
|
* kvm_s390_gisc_unregister - unregister a guest ISC |
|
* |
|
* @kvm: the kernel vm to work with |
|
* @gisc: the guest interruption sub class to register |
|
* |
|
* The function reduces the vm specific alert mask to use. |
|
* The effective IAM mask in the GISA is updated as well |
|
* in case the GISA is not part of the GIB alert list. |
|
* It will be updated latest when the IAM gets restored |
|
* by gisa_get_ipm_or_restore_iam(). |
|
* |
|
* Returns: the nonspecific ISC (NISC) the gib alert mechanism |
|
* has registered with the channel subsystem. |
|
* -ENODEV in case the vm uses no GISA |
|
* -ERANGE in case the guest ISC is invalid |
|
* -EINVAL in case the guest ISC is not registered |
|
*/ |
|
int kvm_s390_gisc_unregister(struct kvm *kvm, u32 gisc) |
|
{ |
|
struct kvm_s390_gisa_interrupt *gi = &kvm->arch.gisa_int; |
|
int rc = 0; |
|
|
|
if (!gi->origin) |
|
return -ENODEV; |
|
if (gisc > MAX_ISC) |
|
return -ERANGE; |
|
|
|
spin_lock(&gi->alert.ref_lock); |
|
if (gi->alert.ref_count[gisc] == 0) { |
|
rc = -EINVAL; |
|
goto out; |
|
} |
|
gi->alert.ref_count[gisc]--; |
|
if (gi->alert.ref_count[gisc] == 0) { |
|
gi->alert.mask &= ~(0x80 >> gisc); |
|
gisa_set_iam(gi->origin, gi->alert.mask); |
|
} |
|
out: |
|
spin_unlock(&gi->alert.ref_lock); |
|
|
|
return rc; |
|
} |
|
EXPORT_SYMBOL_GPL(kvm_s390_gisc_unregister); |
|
|
|
static void gib_alert_irq_handler(struct airq_struct *airq, bool floating) |
|
{ |
|
inc_irq_stat(IRQIO_GAL); |
|
process_gib_alert_list(); |
|
} |
|
|
|
static struct airq_struct gib_alert_irq = { |
|
.handler = gib_alert_irq_handler, |
|
.lsi_ptr = &gib_alert_irq.lsi_mask, |
|
}; |
|
|
|
void kvm_s390_gib_destroy(void) |
|
{ |
|
if (!gib) |
|
return; |
|
chsc_sgib(0); |
|
unregister_adapter_interrupt(&gib_alert_irq); |
|
free_page((unsigned long)gib); |
|
gib = NULL; |
|
} |
|
|
|
int kvm_s390_gib_init(u8 nisc) |
|
{ |
|
int rc = 0; |
|
|
|
if (!css_general_characteristics.aiv) { |
|
KVM_EVENT(3, "%s", "gib not initialized, no AIV facility"); |
|
goto out; |
|
} |
|
|
|
gib = (struct kvm_s390_gib *)get_zeroed_page(GFP_KERNEL_ACCOUNT | GFP_DMA); |
|
if (!gib) { |
|
rc = -ENOMEM; |
|
goto out; |
|
} |
|
|
|
gib_alert_irq.isc = nisc; |
|
if (register_adapter_interrupt(&gib_alert_irq)) { |
|
pr_err("Registering the GIB alert interruption handler failed\n"); |
|
rc = -EIO; |
|
goto out_free_gib; |
|
} |
|
|
|
gib->nisc = nisc; |
|
if (chsc_sgib((u32)(u64)gib)) { |
|
pr_err("Associating the GIB with the AIV facility failed\n"); |
|
free_page((unsigned long)gib); |
|
gib = NULL; |
|
rc = -EIO; |
|
goto out_unreg_gal; |
|
} |
|
|
|
KVM_EVENT(3, "gib 0x%pK (nisc=%d) initialized", gib, gib->nisc); |
|
goto out; |
|
|
|
out_unreg_gal: |
|
unregister_adapter_interrupt(&gib_alert_irq); |
|
out_free_gib: |
|
free_page((unsigned long)gib); |
|
gib = NULL; |
|
out: |
|
return rc; |
|
}
|
|
|