diff options
| author | Michael Roth <michael.roth@amd.com> | 2021-12-16 11:13:54 -0600 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2022-01-07 10:44:46 -0500 |
| commit | 405329fc9aeef1e3e2eccaadf32b539ad6c7120f (patch) | |
| tree | dd8be0f01d94130ad82ea54e3dd6b51808c796e8 /arch/x86/include/asm/kvm-x86-ops.h | |
| parent | 907d139318b5109e5b676b32b0f4a2c666a8d9ac (diff) | |
KVM: SVM: include CR3 in initial VMSA state for SEV-ES guests
Normally guests will set up CR3 themselves, but some guests, such as
kselftests, and potentially CONFIG_PVH guests, rely on being booted
with paging enabled and CR3 initialized to a pre-allocated page table.
Currently CR3 updates via KVM_SET_SREGS* are not loaded into the guest
VMCB until just prior to entering the guest. For SEV-ES/SEV-SNP, this
is too late, since it will have switched over to using the VMSA page
prior to that point, with the VMSA CR3 copied from the VMCB initial
CR3 value: 0.
Address this by sync'ing the CR3 value into the VMCB save area
immediately when KVM_SET_SREGS* is issued so it will find it's way into
the initial VMSA.
Suggested-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: Michael Roth <michael.roth@amd.com>
Message-Id: <20211216171358.61140-10-michael.roth@amd.com>
[Remove vmx_post_set_cr3; add a remark about kvm_set_cr3 not calling the
new hook. - Paolo]
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/include/asm/kvm-x86-ops.h')
| -rw-r--r-- | arch/x86/include/asm/kvm-x86-ops.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/x86/include/asm/kvm-x86-ops.h b/arch/x86/include/asm/kvm-x86-ops.h index 9e50da3ed01a..f658bb4dbb74 100644 --- a/arch/x86/include/asm/kvm-x86-ops.h +++ b/arch/x86/include/asm/kvm-x86-ops.h @@ -35,6 +35,7 @@ KVM_X86_OP(get_cpl) KVM_X86_OP(set_segment) KVM_X86_OP_NULL(get_cs_db_l_bits) KVM_X86_OP(set_cr0) +KVM_X86_OP_NULL(post_set_cr3) KVM_X86_OP(is_valid_cr4) KVM_X86_OP(set_cr4) KVM_X86_OP(set_efer) |