@@ -165,6 +165,17 @@ void kvm_riscv_vcpu_trap_redirect(struct kvm_vcpu *vcpu,
vcpu->arch.guest_context.sstatus |= SR_SPP;
}
+static inline int vcpu_redirect(struct kvm_vcpu *vcpu, struct kvm_cpu_trap *trap)
+{
+ int ret = -EFAULT;
+
+ if (vcpu->arch.guest_context.hstatus & HSTATUS_SPV) {
+ kvm_riscv_vcpu_trap_redirect(vcpu, trap);
+ ret = 1;
+ }
+ return ret;
+}
+
/*
* Return > 0 to return to guest, < 0 on error, 0 (and set exit_reason) on
* proper exit to userspace.
@@ -183,15 +194,27 @@ int kvm_riscv_vcpu_exit(struct kvm_vcpu *vcpu, struct kvm_run *run,
run->exit_reason = KVM_EXIT_UNKNOWN;
switch (trap->scause) {
case EXC_INST_ILLEGAL:
+ kvm_riscv_vcpu_pmu_incr_fw(vcpu, SBI_PMU_FW_ILLEGAL_INSN);
+ ret = vcpu_redirect(vcpu, trap);
+ break;
case EXC_LOAD_MISALIGNED:
+ kvm_riscv_vcpu_pmu_incr_fw(vcpu, SBI_PMU_FW_MISALIGNED_LOAD);
+ ret = vcpu_redirect(vcpu, trap);
+ break;
case EXC_STORE_MISALIGNED:
+ kvm_riscv_vcpu_pmu_incr_fw(vcpu, SBI_PMU_FW_MISALIGNED_STORE);
+ ret = vcpu_redirect(vcpu, trap);
+ break;
case EXC_LOAD_ACCESS:
+ kvm_riscv_vcpu_pmu_incr_fw(vcpu, SBI_PMU_FW_ACCESS_LOAD);
+ ret = vcpu_redirect(vcpu, trap);
+ break;
case EXC_STORE_ACCESS:
+ kvm_riscv_vcpu_pmu_incr_fw(vcpu, SBI_PMU_FW_ACCESS_STORE);
+ ret = vcpu_redirect(vcpu, trap);
+ break;
case EXC_INST_ACCESS:
- if (vcpu->arch.guest_context.hstatus & HSTATUS_SPV) {
- kvm_riscv_vcpu_trap_redirect(vcpu, trap);
- ret = 1;
- }
+ ret = vcpu_redirect(vcpu, trap);
break;
case EXC_VIRTUAL_INST_FAULT:
if (vcpu->arch.guest_context.hstatus & HSTATUS_SPV)
SBI PMU specification defines few firmware counters which can be used by the guests to collect the statstics about various traps occurred in the host. Update these counters whenever a corresponding trap is taken Signed-off-by: Atish Patra <atishp@rivosinc.com> --- arch/riscv/kvm/vcpu_exit.c | 31 +++++++++++++++++++++++++++---- 1 file changed, 27 insertions(+), 4 deletions(-)