[RFC PATCH 3/7] KVM: x86: SVM: Update dump_vmcb with shadow stack save area additions

From: John Allen
Date: Wed Oct 12 2022 - 16:40:08 EST


Add shadow stack VMCB save area fields to dump_vmcb. Only include S_CET,
SSP, and ISST_ADDR. Since there currently isn't support to decrypt and
dump the SEV-ES save area, exclude PL0_SSP, PL1_SSP, PL2_SSP, PL3_SSP, and
U_CET which are only inlcuded in the SEV-ES save area.

Signed-off-by: John Allen <john.allen@xxxxxxx>
---
arch/x86/kvm/svm/svm.c | 4 ++++
1 file changed, 4 insertions(+)

diff --git a/arch/x86/kvm/svm/svm.c b/arch/x86/kvm/svm/svm.c
index 1f31a991c745..411c815d2d91 100644
--- a/arch/x86/kvm/svm/svm.c
+++ b/arch/x86/kvm/svm/svm.c
@@ -3372,6 +3372,10 @@ 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",
--
2.34.3