diff options
| author | Jordan Niethe <jniethe5@gmail.com> | 2023-12-01 16:26:08 +0300 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2023-12-07 15:33:07 +0300 |
| commit | 63ccae78cd88b52fb1d598ae33fa8408ce067b30 (patch) | |
| tree | af65db70925d419cc137504dd95fb030be5042b4 /arch/powerpc/kvm | |
| parent | e0d4acbcba3f2d63dc15bc5432c8e26fc9e19675 (diff) | |
| download | linux-63ccae78cd88b52fb1d598ae33fa8408ce067b30.tar.xz | |
KVM: PPC: Book3S HV nestedv2: Do not check msr on hcalls
The check for a hcall coming from userspace is done for KVM-PR. This is
not supported for nestedv2 and the L0 will directly inject the necessary
exception to the L2 if userspace performs a hcall. Avoid checking the
MSR and thus avoid a H_GUEST_GET_STATE hcall in the L1.
Signed-off-by: Jordan Niethe <jniethe5@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20231201132618.555031-4-vaibhav@linux.ibm.com
Diffstat (limited to 'arch/powerpc/kvm')
| -rw-r--r-- | arch/powerpc/kvm/book3s_hv.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/powerpc/kvm/book3s_hv.c b/arch/powerpc/kvm/book3s_hv.c index 5543e8490cd9..069c336b6f3c 100644 --- a/arch/powerpc/kvm/book3s_hv.c +++ b/arch/powerpc/kvm/book3s_hv.c @@ -1688,7 +1688,7 @@ static int kvmppc_handle_exit_hv(struct kvm_vcpu *vcpu, { int i; - if (unlikely(__kvmppc_get_msr_hv(vcpu) & MSR_PR)) { + if (!kvmhv_is_nestedv2() && unlikely(__kvmppc_get_msr_hv(vcpu) & MSR_PR)) { /* * Guest userspace executed sc 1. This can only be * reached by the P9 path because the old path @@ -4949,7 +4949,7 @@ static int kvmppc_vcpu_run_hv(struct kvm_vcpu *vcpu) if (run->exit_reason == KVM_EXIT_PAPR_HCALL) { accumulate_time(vcpu, &vcpu->arch.hcall); - if (WARN_ON_ONCE(__kvmppc_get_msr_hv(vcpu) & MSR_PR)) { + if (!kvmhv_is_nestedv2() && WARN_ON_ONCE(__kvmppc_get_msr_hv(vcpu) & MSR_PR)) { /* * These should have been caught reflected * into the guest by now. Final sanity check: |