linux-kernel - [PATCH v2 3/9] KVM: x86: SVM: Update dump_vmcb with shadow stack save area additions

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Message-ID: <20240226213244.18441-4-john.allen@amd.com>
Date: Mon, 26 Feb 2024 21:32:38 +0000
From: John Allen <john.allen@....com>
To: <kvm@...r.kernel.org>
CC: <weijiang.yang@...el.com>, <rick.p.edgecombe@...el.com>,
	<seanjc@...gle.com>, <thomas.lendacky@....com>, <bp@...en8.de>,
	<pbonzini@...hat.com>, <mlevitsk@...hat.com>, <linux-kernel@...r.kernel.org>,
	<x86@...nel.org>, John Allen <john.allen@....com>
Subject: [PATCH v2 3/9] KVM: x86: SVM: Update dump_vmcb with shadow stack save area additions

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@....com>
---
 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 70f6fb1a166b..0b8b346a470a 100644
--- a/arch/x86/kvm/svm/svm.c
+++ b/arch/x86/kvm/svm/svm.c
@@ -3431,6 +3431,10 @@ 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",
-- 
2.40.1