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KVM: SVM: Update dump_vmcb with shadow stack save area additions

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Add shadow stack VMCB fields to dump_vmcb. PL0_SSP, PL1_SSP, PL2_SSP,
PL3_SSP, and U_CET are part of the SEV-ES save area and are encrypted,
but can be decrypted and dumped if the guest policy allows debugging.

Reviewed-by: Maxim Levitsky <mlevitsk@redhat.com>
Signed-off-by: John Allen <john.allen@amd.com>
Link: https://lore.kernel.org/r/20250919223258.1604852-38-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
This commit is contained in:
John Allen
2025-09-19 15:32:44 -07:00
committed by Sean Christopherson
parent c5ba494585
commit c7586aa3be
1 changed files with 11 additions and 0 deletions
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arch/x86/kvm/svm/svm.c
+11
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@@ -3410,6 +3410,10 @@ static void dump_vmcb(struct kvm_vcpu *vcpu)
"rip:", save->rip, "rflags:", save->rflags);
pr_err("%-15s %016llx %-13s %016llx\n",
"rsp:", save->rsp, "rax:", save->rax);
pr_err("%-15s %016llx %-13s %016llx\n",
"s_cet:", save->s_cet, "ssp:", save->ssp);
pr_err("%-15s %016llx\n",
"isst_addr:", save->isst_addr);
pr_err("%-15s %016llx %-13s %016llx\n",
"star:", save01->star, "lstar:", save01->lstar);
pr_err("%-15s %016llx %-13s %016llx\n",
@@ -3434,6 +3438,13 @@ static void dump_vmcb(struct kvm_vcpu *vcpu)
pr_err("%-15s %016llx\n",
"sev_features", vmsa->sev_features);
pr_err("%-15s %016llx %-13s %016llx\n",
"pl0_ssp:", vmsa->pl0_ssp, "pl1_ssp:", vmsa->pl1_ssp);
pr_err("%-15s %016llx %-13s %016llx\n",
"pl2_ssp:", vmsa->pl2_ssp, "pl3_ssp:", vmsa->pl3_ssp);
pr_err("%-15s %016llx\n",
"u_cet:", vmsa->u_cet);
pr_err("%-15s %016llx %-13s %016llx\n",
"rax:", vmsa->rax, "rbx:", vmsa->rbx);
pr_err("%-15s %016llx %-13s %016llx\n",