forked from Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
118 lines
2.9 KiB
118 lines
2.9 KiB
// SPDX-License-Identifier: GPL-2.0 |
|
/* |
|
* Copyright (c) 2021 Western Digital Corporation or its affiliates. |
|
* |
|
* Authors: |
|
* Atish Patra <[email protected]> |
|
*/ |
|
|
|
#include <linux/errno.h> |
|
#include <linux/err.h> |
|
#include <linux/kvm_host.h> |
|
#include <asm/csr.h> |
|
#include <asm/sbi.h> |
|
#include <asm/kvm_vcpu_timer.h> |
|
#include <asm/kvm_vcpu_sbi.h> |
|
|
|
static int kvm_sbi_ext_v01_handler(struct kvm_vcpu *vcpu, struct kvm_run *run, |
|
unsigned long *out_val, |
|
struct kvm_cpu_trap *utrap, |
|
bool *exit) |
|
{ |
|
ulong hmask; |
|
int i, ret = 0; |
|
u64 next_cycle; |
|
struct kvm_vcpu *rvcpu; |
|
struct kvm *kvm = vcpu->kvm; |
|
struct kvm_cpu_context *cp = &vcpu->arch.guest_context; |
|
|
|
switch (cp->a7) { |
|
case SBI_EXT_0_1_CONSOLE_GETCHAR: |
|
case SBI_EXT_0_1_CONSOLE_PUTCHAR: |
|
/* |
|
* The CONSOLE_GETCHAR/CONSOLE_PUTCHAR SBI calls cannot be |
|
* handled in kernel so we forward these to user-space |
|
*/ |
|
kvm_riscv_vcpu_sbi_forward(vcpu, run); |
|
*exit = true; |
|
break; |
|
case SBI_EXT_0_1_SET_TIMER: |
|
#if __riscv_xlen == 32 |
|
next_cycle = ((u64)cp->a1 << 32) | (u64)cp->a0; |
|
#else |
|
next_cycle = (u64)cp->a0; |
|
#endif |
|
ret = kvm_riscv_vcpu_timer_next_event(vcpu, next_cycle); |
|
break; |
|
case SBI_EXT_0_1_CLEAR_IPI: |
|
ret = kvm_riscv_vcpu_unset_interrupt(vcpu, IRQ_VS_SOFT); |
|
break; |
|
case SBI_EXT_0_1_SEND_IPI: |
|
if (cp->a0) |
|
hmask = kvm_riscv_vcpu_unpriv_read(vcpu, false, cp->a0, |
|
utrap); |
|
else |
|
hmask = (1UL << atomic_read(&kvm->online_vcpus)) - 1; |
|
if (utrap->scause) |
|
break; |
|
|
|
for_each_set_bit(i, &hmask, BITS_PER_LONG) { |
|
rvcpu = kvm_get_vcpu_by_id(vcpu->kvm, i); |
|
ret = kvm_riscv_vcpu_set_interrupt(rvcpu, IRQ_VS_SOFT); |
|
if (ret < 0) |
|
break; |
|
} |
|
break; |
|
case SBI_EXT_0_1_SHUTDOWN: |
|
kvm_riscv_vcpu_sbi_system_reset(vcpu, run, |
|
KVM_SYSTEM_EVENT_SHUTDOWN, 0); |
|
*exit = true; |
|
break; |
|
case SBI_EXT_0_1_REMOTE_FENCE_I: |
|
case SBI_EXT_0_1_REMOTE_SFENCE_VMA: |
|
case SBI_EXT_0_1_REMOTE_SFENCE_VMA_ASID: |
|
if (cp->a0) |
|
hmask = kvm_riscv_vcpu_unpriv_read(vcpu, false, cp->a0, |
|
utrap); |
|
else |
|
hmask = (1UL << atomic_read(&kvm->online_vcpus)) - 1; |
|
if (utrap->scause) |
|
break; |
|
|
|
if (cp->a7 == SBI_EXT_0_1_REMOTE_FENCE_I) |
|
kvm_riscv_fence_i(vcpu->kvm, 0, hmask); |
|
else if (cp->a7 == SBI_EXT_0_1_REMOTE_SFENCE_VMA) { |
|
if (cp->a1 == 0 && cp->a2 == 0) |
|
kvm_riscv_hfence_vvma_all(vcpu->kvm, |
|
0, hmask); |
|
else |
|
kvm_riscv_hfence_vvma_gva(vcpu->kvm, |
|
0, hmask, |
|
cp->a1, cp->a2, |
|
PAGE_SHIFT); |
|
} else { |
|
if (cp->a1 == 0 && cp->a2 == 0) |
|
kvm_riscv_hfence_vvma_asid_all(vcpu->kvm, |
|
0, hmask, |
|
cp->a3); |
|
else |
|
kvm_riscv_hfence_vvma_asid_gva(vcpu->kvm, |
|
0, hmask, |
|
cp->a1, cp->a2, |
|
PAGE_SHIFT, |
|
cp->a3); |
|
} |
|
break; |
|
default: |
|
ret = -EINVAL; |
|
break; |
|
} |
|
|
|
return ret; |
|
} |
|
|
|
const struct kvm_vcpu_sbi_extension vcpu_sbi_ext_v01 = { |
|
.extid_start = SBI_EXT_0_1_SET_TIMER, |
|
.extid_end = SBI_EXT_0_1_SHUTDOWN, |
|
.handler = kvm_sbi_ext_v01_handler, |
|
};
|
|
|