diff options
| author | Tom Lendacky <thomas.lendacky@amd.com> | 2020-12-10 11:09:53 -0600 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2020-12-15 05:20:50 -0500 |
| commit | 8f423a80d299a5b3964b8af005d1aab4e5e9106a (patch) | |
| tree | 61876c26fe716a693140b408563c928b74da1c18 /arch/x86/kvm/svm/svm.h | |
| parent | 59e38b58de283f76c533a2da416abf93bfd9ea41 (diff) | |
KVM: SVM: Support MMIO for an SEV-ES guest
For an SEV-ES guest, MMIO is performed to a shared (un-encrypted) page
so that both the hypervisor and guest can read or write to it and each
see the contents.
The GHCB specification provides software-defined VMGEXIT exit codes to
indicate a request for an MMIO read or an MMIO write. Add support to
recognize the MMIO requests and invoke SEV-ES specific routines that
can complete the MMIO operation. These routines use common KVM support
to complete the MMIO operation.
Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Message-Id: <af8de55127d5bcc3253d9b6084a0144c12307d4d.1607620209.git.thomas.lendacky@amd.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm/svm/svm.h')
| -rw-r--r-- | arch/x86/kvm/svm/svm.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/x86/kvm/svm/svm.h b/arch/x86/kvm/svm/svm.h index fc69bc2e0cad..9019ad6a8138 100644 --- a/arch/x86/kvm/svm/svm.h +++ b/arch/x86/kvm/svm/svm.h @@ -174,6 +174,12 @@ struct vcpu_svm { struct vmcb_save_area *vmsa; struct ghcb *ghcb; struct kvm_host_map ghcb_map; + + /* SEV-ES scratch area support */ + void *ghcb_sa; + u64 ghcb_sa_len; + bool ghcb_sa_sync; + bool ghcb_sa_free; }; struct svm_cpu_data { |