From: Tom Lendacky <[email protected]> When a guest is running as an SEV-ES guest, it is not possible to emulate MMIO. Add support to prevent trying to perform MMIO emulation.
Signed-off-by: Tom Lendacky <[email protected]> --- arch/x86/kvm/mmu/mmu.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c index a5d0207e7189..2e1b8b876286 100644 --- a/arch/x86/kvm/mmu/mmu.c +++ b/arch/x86/kvm/mmu/mmu.c @@ -5485,6 +5485,13 @@ int kvm_mmu_page_fault(struct kvm_vcpu *vcpu, gpa_t cr2_or_gpa, u64 error_code, if (!mmio_info_in_cache(vcpu, cr2_or_gpa, direct) && !is_guest_mode(vcpu)) emulation_type |= EMULTYPE_ALLOW_RETRY_PF; emulate: + /* + * When the guest is an SEV-ES guest, emulation is not possible. Allow + * the guest to handle the MMIO emulation. + */ + if (vcpu->arch.vmsa_encrypted) + return 1; + /* * On AMD platforms, under certain conditions insn_len may be zero on #NPF. * This can happen if a guest gets a page-fault on data access but the HW -- 2.28.0
