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| author | Brijesh Singh <brijesh.singh@amd.com> | 2022-03-07 15:33:11 -0600 |
|---|---|---|
| committer | Borislav Petkov <bp@suse.de> | 2022-04-05 19:09:27 +0200 |
| commit | 046f773be106ec8eb92b13414c90f8e279deffe0 (patch) | |
| tree | 9064115bd638d18a63acc36043320d1029b1e636 | |
| parent | 3123109284176b1532874591f7c81f3837bbdc17 (diff) | |
| download | linux-stable-046f773be106ec8eb92b13414c90f8e279deffe0.tar.gz linux-stable-046f773be106ec8eb92b13414c90f8e279deffe0.tar.bz2 linux-stable-046f773be106ec8eb92b13414c90f8e279deffe0.zip | |
KVM: SVM: Define sev_features and VMPL field in the VMSA
The hypervisor uses the sev_features field (offset 3B0h) in the Save State
Area to control the SEV-SNP guest features such as SNPActive, vTOM,
ReflectVC etc. An SEV-SNP guest can read the sev_features field through
the SEV_STATUS MSR.
While at it, update dump_vmcb() to log the VMPL level.
See APM2 Table 15-34 and B-4 for more details.
Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Venu Busireddy <venu.busireddy@oracle.com>
Link: https://lore.kernel.org/r/20220307213356.2797205-2-brijesh.singh@amd.com
| -rw-r--r-- | arch/x86/include/asm/svm.h | 6 | ||||
| -rw-r--r-- | arch/x86/kvm/svm/svm.c | 4 |
2 files changed, 6 insertions, 4 deletions
diff --git a/arch/x86/include/asm/svm.h b/arch/x86/include/asm/svm.h index f70a5108d464..f2d01f351e95 100644 --- a/arch/x86/include/asm/svm.h +++ b/arch/x86/include/asm/svm.h @@ -282,7 +282,8 @@ struct vmcb_save_area { struct vmcb_seg ldtr; struct vmcb_seg idtr; struct vmcb_seg tr; - u8 reserved_1[43]; + u8 reserved_1[42]; + u8 vmpl; u8 cpl; u8 reserved_2[4]; u64 efer; @@ -347,7 +348,8 @@ struct vmcb_save_area { u64 sw_exit_info_1; u64 sw_exit_info_2; u64 sw_scratch; - u8 reserved_11[56]; + u64 sev_features; + u8 reserved_11[48]; u64 xcr0; u8 valid_bitmap[16]; u64 x87_state_gpa; diff --git a/arch/x86/kvm/svm/svm.c b/arch/x86/kvm/svm/svm.c index bd4c64b362d2..81cb518170a8 100644 --- a/arch/x86/kvm/svm/svm.c +++ b/arch/x86/kvm/svm/svm.c @@ -3117,8 +3117,8 @@ static void dump_vmcb(struct kvm_vcpu *vcpu) "tr:", save01->tr.selector, save01->tr.attrib, save01->tr.limit, save01->tr.base); - pr_err("cpl: %d efer: %016llx\n", - save->cpl, save->efer); + pr_err("vmpl: %d cpl: %d efer: %016llx\n", + save->vmpl, save->cpl, save->efer); pr_err("%-15s %016llx %-13s %016llx\n", "cr0:", save->cr0, "cr2:", save->cr2); pr_err("%-15s %016llx %-13s %016llx\n", |