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422 lines
10 KiB
422 lines
10 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* Copyright (C) 2010,2012 Freescale Semiconductor, Inc. All rights reserved. |
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* |
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* Author: Varun Sethi, <[email protected]> |
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* |
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* Description: |
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* This file is derived from arch/powerpc/kvm/e500.c, |
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* by Yu Liu <[email protected]>. |
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*/ |
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#include <linux/kvm_host.h> |
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#include <linux/slab.h> |
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#include <linux/err.h> |
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#include <linux/export.h> |
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#include <linux/miscdevice.h> |
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#include <linux/module.h> |
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#include <asm/reg.h> |
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#include <asm/cputable.h> |
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#include <asm/kvm_ppc.h> |
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#include <asm/dbell.h> |
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#include "booke.h" |
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#include "e500.h" |
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void kvmppc_set_pending_interrupt(struct kvm_vcpu *vcpu, enum int_class type) |
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{ |
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enum ppc_dbell dbell_type; |
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unsigned long tag; |
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switch (type) { |
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case INT_CLASS_NONCRIT: |
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dbell_type = PPC_G_DBELL; |
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break; |
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case INT_CLASS_CRIT: |
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dbell_type = PPC_G_DBELL_CRIT; |
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break; |
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case INT_CLASS_MC: |
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dbell_type = PPC_G_DBELL_MC; |
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break; |
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default: |
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WARN_ONCE(1, "%s: unknown int type %d\n", __func__, type); |
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return; |
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} |
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preempt_disable(); |
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tag = PPC_DBELL_LPID(get_lpid(vcpu)) | vcpu->vcpu_id; |
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mb(); |
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ppc_msgsnd(dbell_type, 0, tag); |
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preempt_enable(); |
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} |
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/* gtlbe must not be mapped by more than one host tlb entry */ |
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void kvmppc_e500_tlbil_one(struct kvmppc_vcpu_e500 *vcpu_e500, |
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struct kvm_book3e_206_tlb_entry *gtlbe) |
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{ |
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unsigned int tid, ts; |
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gva_t eaddr; |
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u32 val; |
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unsigned long flags; |
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ts = get_tlb_ts(gtlbe); |
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tid = get_tlb_tid(gtlbe); |
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/* We search the host TLB to invalidate its shadow TLB entry */ |
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val = (tid << 16) | ts; |
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eaddr = get_tlb_eaddr(gtlbe); |
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local_irq_save(flags); |
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mtspr(SPRN_MAS6, val); |
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mtspr(SPRN_MAS5, MAS5_SGS | get_lpid(&vcpu_e500->vcpu)); |
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asm volatile("tlbsx 0, %[eaddr]\n" : : [eaddr] "r" (eaddr)); |
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val = mfspr(SPRN_MAS1); |
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if (val & MAS1_VALID) { |
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mtspr(SPRN_MAS1, val & ~MAS1_VALID); |
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asm volatile("tlbwe"); |
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} |
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mtspr(SPRN_MAS5, 0); |
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/* NOTE: tlbsx also updates mas8, so clear it for host tlbwe */ |
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mtspr(SPRN_MAS8, 0); |
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isync(); |
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local_irq_restore(flags); |
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} |
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void kvmppc_e500_tlbil_all(struct kvmppc_vcpu_e500 *vcpu_e500) |
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{ |
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unsigned long flags; |
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local_irq_save(flags); |
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mtspr(SPRN_MAS5, MAS5_SGS | get_lpid(&vcpu_e500->vcpu)); |
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asm volatile("tlbilxlpid"); |
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mtspr(SPRN_MAS5, 0); |
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local_irq_restore(flags); |
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} |
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void kvmppc_set_pid(struct kvm_vcpu *vcpu, u32 pid) |
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{ |
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vcpu->arch.pid = pid; |
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} |
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void kvmppc_mmu_msr_notify(struct kvm_vcpu *vcpu, u32 old_msr) |
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{ |
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} |
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/* We use two lpids per VM */ |
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static DEFINE_PER_CPU(struct kvm_vcpu *[KVMPPC_NR_LPIDS], last_vcpu_of_lpid); |
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static void kvmppc_core_vcpu_load_e500mc(struct kvm_vcpu *vcpu, int cpu) |
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{ |
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struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu); |
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kvmppc_booke_vcpu_load(vcpu, cpu); |
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mtspr(SPRN_LPID, get_lpid(vcpu)); |
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mtspr(SPRN_EPCR, vcpu->arch.shadow_epcr); |
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mtspr(SPRN_GPIR, vcpu->vcpu_id); |
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mtspr(SPRN_MSRP, vcpu->arch.shadow_msrp); |
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vcpu->arch.eplc = EPC_EGS | (get_lpid(vcpu) << EPC_ELPID_SHIFT); |
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vcpu->arch.epsc = vcpu->arch.eplc; |
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mtspr(SPRN_EPLC, vcpu->arch.eplc); |
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mtspr(SPRN_EPSC, vcpu->arch.epsc); |
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mtspr(SPRN_GIVPR, vcpu->arch.ivpr); |
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mtspr(SPRN_GIVOR2, vcpu->arch.ivor[BOOKE_IRQPRIO_DATA_STORAGE]); |
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mtspr(SPRN_GIVOR8, vcpu->arch.ivor[BOOKE_IRQPRIO_SYSCALL]); |
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mtspr(SPRN_GSPRG0, (unsigned long)vcpu->arch.shared->sprg0); |
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mtspr(SPRN_GSPRG1, (unsigned long)vcpu->arch.shared->sprg1); |
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mtspr(SPRN_GSPRG2, (unsigned long)vcpu->arch.shared->sprg2); |
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mtspr(SPRN_GSPRG3, (unsigned long)vcpu->arch.shared->sprg3); |
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mtspr(SPRN_GSRR0, vcpu->arch.shared->srr0); |
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mtspr(SPRN_GSRR1, vcpu->arch.shared->srr1); |
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mtspr(SPRN_GEPR, vcpu->arch.epr); |
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mtspr(SPRN_GDEAR, vcpu->arch.shared->dar); |
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mtspr(SPRN_GESR, vcpu->arch.shared->esr); |
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if (vcpu->arch.oldpir != mfspr(SPRN_PIR) || |
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__this_cpu_read(last_vcpu_of_lpid[get_lpid(vcpu)]) != vcpu) { |
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kvmppc_e500_tlbil_all(vcpu_e500); |
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__this_cpu_write(last_vcpu_of_lpid[get_lpid(vcpu)], vcpu); |
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} |
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} |
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static void kvmppc_core_vcpu_put_e500mc(struct kvm_vcpu *vcpu) |
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{ |
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vcpu->arch.eplc = mfspr(SPRN_EPLC); |
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vcpu->arch.epsc = mfspr(SPRN_EPSC); |
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vcpu->arch.shared->sprg0 = mfspr(SPRN_GSPRG0); |
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vcpu->arch.shared->sprg1 = mfspr(SPRN_GSPRG1); |
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vcpu->arch.shared->sprg2 = mfspr(SPRN_GSPRG2); |
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vcpu->arch.shared->sprg3 = mfspr(SPRN_GSPRG3); |
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vcpu->arch.shared->srr0 = mfspr(SPRN_GSRR0); |
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vcpu->arch.shared->srr1 = mfspr(SPRN_GSRR1); |
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vcpu->arch.epr = mfspr(SPRN_GEPR); |
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vcpu->arch.shared->dar = mfspr(SPRN_GDEAR); |
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vcpu->arch.shared->esr = mfspr(SPRN_GESR); |
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vcpu->arch.oldpir = mfspr(SPRN_PIR); |
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kvmppc_booke_vcpu_put(vcpu); |
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} |
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int kvmppc_core_check_processor_compat(void) |
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{ |
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int r; |
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if (strcmp(cur_cpu_spec->cpu_name, "e500mc") == 0) |
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r = 0; |
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else if (strcmp(cur_cpu_spec->cpu_name, "e5500") == 0) |
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r = 0; |
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#ifdef CONFIG_ALTIVEC |
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/* |
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* Since guests have the privilege to enable AltiVec, we need AltiVec |
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* support in the host to save/restore their context. |
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* Don't use CPU_FTR_ALTIVEC to identify cores with AltiVec unit |
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* because it's cleared in the absence of CONFIG_ALTIVEC! |
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*/ |
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else if (strcmp(cur_cpu_spec->cpu_name, "e6500") == 0) |
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r = 0; |
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#endif |
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else |
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r = -ENOTSUPP; |
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return r; |
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} |
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int kvmppc_core_vcpu_setup(struct kvm_vcpu *vcpu) |
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{ |
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struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu); |
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vcpu->arch.shadow_epcr = SPRN_EPCR_DSIGS | SPRN_EPCR_DGTMI | \ |
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SPRN_EPCR_DUVD; |
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#ifdef CONFIG_64BIT |
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vcpu->arch.shadow_epcr |= SPRN_EPCR_ICM; |
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#endif |
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vcpu->arch.shadow_msrp = MSRP_UCLEP | MSRP_PMMP; |
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vcpu->arch.pvr = mfspr(SPRN_PVR); |
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vcpu_e500->svr = mfspr(SPRN_SVR); |
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vcpu->arch.cpu_type = KVM_CPU_E500MC; |
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return 0; |
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} |
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static int kvmppc_core_get_sregs_e500mc(struct kvm_vcpu *vcpu, |
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struct kvm_sregs *sregs) |
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{ |
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struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu); |
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sregs->u.e.features |= KVM_SREGS_E_ARCH206_MMU | KVM_SREGS_E_PM | |
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KVM_SREGS_E_PC; |
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sregs->u.e.impl_id = KVM_SREGS_E_IMPL_FSL; |
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sregs->u.e.impl.fsl.features = 0; |
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sregs->u.e.impl.fsl.svr = vcpu_e500->svr; |
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sregs->u.e.impl.fsl.hid0 = vcpu_e500->hid0; |
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sregs->u.e.impl.fsl.mcar = vcpu_e500->mcar; |
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kvmppc_get_sregs_e500_tlb(vcpu, sregs); |
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sregs->u.e.ivor_high[3] = |
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vcpu->arch.ivor[BOOKE_IRQPRIO_PERFORMANCE_MONITOR]; |
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sregs->u.e.ivor_high[4] = vcpu->arch.ivor[BOOKE_IRQPRIO_DBELL]; |
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sregs->u.e.ivor_high[5] = vcpu->arch.ivor[BOOKE_IRQPRIO_DBELL_CRIT]; |
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return kvmppc_get_sregs_ivor(vcpu, sregs); |
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} |
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static int kvmppc_core_set_sregs_e500mc(struct kvm_vcpu *vcpu, |
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struct kvm_sregs *sregs) |
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{ |
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struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu); |
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int ret; |
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if (sregs->u.e.impl_id == KVM_SREGS_E_IMPL_FSL) { |
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vcpu_e500->svr = sregs->u.e.impl.fsl.svr; |
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vcpu_e500->hid0 = sregs->u.e.impl.fsl.hid0; |
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vcpu_e500->mcar = sregs->u.e.impl.fsl.mcar; |
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} |
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ret = kvmppc_set_sregs_e500_tlb(vcpu, sregs); |
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if (ret < 0) |
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return ret; |
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if (!(sregs->u.e.features & KVM_SREGS_E_IVOR)) |
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return 0; |
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if (sregs->u.e.features & KVM_SREGS_E_PM) { |
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vcpu->arch.ivor[BOOKE_IRQPRIO_PERFORMANCE_MONITOR] = |
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sregs->u.e.ivor_high[3]; |
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} |
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if (sregs->u.e.features & KVM_SREGS_E_PC) { |
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vcpu->arch.ivor[BOOKE_IRQPRIO_DBELL] = |
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sregs->u.e.ivor_high[4]; |
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vcpu->arch.ivor[BOOKE_IRQPRIO_DBELL_CRIT] = |
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sregs->u.e.ivor_high[5]; |
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} |
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return kvmppc_set_sregs_ivor(vcpu, sregs); |
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} |
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static int kvmppc_get_one_reg_e500mc(struct kvm_vcpu *vcpu, u64 id, |
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union kvmppc_one_reg *val) |
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{ |
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int r = 0; |
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switch (id) { |
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case KVM_REG_PPC_SPRG9: |
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*val = get_reg_val(id, vcpu->arch.sprg9); |
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break; |
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default: |
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r = kvmppc_get_one_reg_e500_tlb(vcpu, id, val); |
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} |
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return r; |
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} |
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static int kvmppc_set_one_reg_e500mc(struct kvm_vcpu *vcpu, u64 id, |
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union kvmppc_one_reg *val) |
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{ |
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int r = 0; |
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switch (id) { |
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case KVM_REG_PPC_SPRG9: |
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vcpu->arch.sprg9 = set_reg_val(id, *val); |
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break; |
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default: |
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r = kvmppc_set_one_reg_e500_tlb(vcpu, id, val); |
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} |
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return r; |
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} |
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static int kvmppc_core_vcpu_create_e500mc(struct kvm_vcpu *vcpu) |
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{ |
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struct kvmppc_vcpu_e500 *vcpu_e500; |
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int err; |
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BUILD_BUG_ON(offsetof(struct kvmppc_vcpu_e500, vcpu) != 0); |
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vcpu_e500 = to_e500(vcpu); |
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/* Invalid PIR value -- this LPID dosn't have valid state on any cpu */ |
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vcpu->arch.oldpir = 0xffffffff; |
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err = kvmppc_e500_tlb_init(vcpu_e500); |
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if (err) |
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return err; |
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vcpu->arch.shared = (void *)__get_free_page(GFP_KERNEL | __GFP_ZERO); |
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if (!vcpu->arch.shared) { |
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err = -ENOMEM; |
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goto uninit_tlb; |
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} |
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return 0; |
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uninit_tlb: |
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kvmppc_e500_tlb_uninit(vcpu_e500); |
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return err; |
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} |
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static void kvmppc_core_vcpu_free_e500mc(struct kvm_vcpu *vcpu) |
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{ |
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struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu); |
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free_page((unsigned long)vcpu->arch.shared); |
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kvmppc_e500_tlb_uninit(vcpu_e500); |
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} |
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static int kvmppc_core_init_vm_e500mc(struct kvm *kvm) |
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{ |
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int lpid; |
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lpid = kvmppc_alloc_lpid(); |
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if (lpid < 0) |
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return lpid; |
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/* |
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* Use two lpids per VM on cores with two threads like e6500. Use |
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* even numbers to speedup vcpu lpid computation with consecutive lpids |
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* per VM. vm1 will use lpids 2 and 3, vm2 lpids 4 and 5, and so on. |
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*/ |
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if (threads_per_core == 2) |
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lpid <<= 1; |
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kvm->arch.lpid = lpid; |
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return 0; |
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} |
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static void kvmppc_core_destroy_vm_e500mc(struct kvm *kvm) |
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{ |
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int lpid = kvm->arch.lpid; |
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if (threads_per_core == 2) |
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lpid >>= 1; |
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kvmppc_free_lpid(lpid); |
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} |
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static struct kvmppc_ops kvm_ops_e500mc = { |
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.get_sregs = kvmppc_core_get_sregs_e500mc, |
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.set_sregs = kvmppc_core_set_sregs_e500mc, |
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.get_one_reg = kvmppc_get_one_reg_e500mc, |
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.set_one_reg = kvmppc_set_one_reg_e500mc, |
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.vcpu_load = kvmppc_core_vcpu_load_e500mc, |
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.vcpu_put = kvmppc_core_vcpu_put_e500mc, |
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.vcpu_create = kvmppc_core_vcpu_create_e500mc, |
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.vcpu_free = kvmppc_core_vcpu_free_e500mc, |
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.init_vm = kvmppc_core_init_vm_e500mc, |
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.destroy_vm = kvmppc_core_destroy_vm_e500mc, |
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.emulate_op = kvmppc_core_emulate_op_e500, |
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.emulate_mtspr = kvmppc_core_emulate_mtspr_e500, |
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.emulate_mfspr = kvmppc_core_emulate_mfspr_e500, |
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}; |
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static int __init kvmppc_e500mc_init(void) |
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{ |
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int r; |
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r = kvmppc_booke_init(); |
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if (r) |
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goto err_out; |
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/* |
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* Use two lpids per VM on dual threaded processors like e6500 |
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* to workarround the lack of tlb write conditional instruction. |
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* Expose half the number of available hardware lpids to the lpid |
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* allocator. |
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*/ |
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kvmppc_init_lpid(KVMPPC_NR_LPIDS/threads_per_core); |
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kvmppc_claim_lpid(0); /* host */ |
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r = kvm_init(NULL, sizeof(struct kvmppc_vcpu_e500), 0, THIS_MODULE); |
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if (r) |
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goto err_out; |
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kvm_ops_e500mc.owner = THIS_MODULE; |
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kvmppc_pr_ops = &kvm_ops_e500mc; |
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err_out: |
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return r; |
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} |
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static void __exit kvmppc_e500mc_exit(void) |
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{ |
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kvmppc_pr_ops = NULL; |
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kvmppc_booke_exit(); |
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} |
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module_init(kvmppc_e500mc_init); |
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module_exit(kvmppc_e500mc_exit); |
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MODULE_ALIAS_MISCDEV(KVM_MINOR); |
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MODULE_ALIAS("devname:kvm");
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