linux-kernel - [PATCH v14 29/22] [SQUASH] KVM: SEV: Support SEV-SNP AP Creation NAE event

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Message-ID: <20240423162144.1780159-7-michael.roth@amd.com>
Date: Tue, 23 Apr 2024 11:21:44 -0500
From: Michael Roth <michael.roth@....com>
To: <kvm@...r.kernel.org>
CC: <linux-coco@...ts.linux.dev>, <linux-mm@...ck.org>,
	<linux-crypto@...r.kernel.org>, <x86@...nel.org>,
	<linux-kernel@...r.kernel.org>, <tglx@...utronix.de>, <mingo@...hat.com>,
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	<jarkko@...nel.org>, <ashish.kalra@....com>, <nikunj.dadhania@....com>,
	<pankaj.gupta@....com>, <liam.merwick@...cle.com>
Subject: [PATCH v14 29/22] [SQUASH] KVM: SEV: Support SEV-SNP AP Creation NAE event

Return an error if non-SNP guest issues AP Creation request.

Signed-off-by: Michael Roth <michael.roth@....com>
---
 arch/x86/kvm/svm/sev.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/x86/kvm/svm/sev.c b/arch/x86/kvm/svm/sev.c
index ff64ed8df301..1137a7f4136b 100644
--- a/arch/x86/kvm/svm/sev.c
+++ b/arch/x86/kvm/svm/sev.c
@@ -3280,6 +3280,8 @@ static int sev_es_validate_vmgexit(struct vcpu_svm *svm)
 			goto vmgexit_err;
 		break;
 	case SVM_VMGEXIT_AP_CREATION:
+		if (!sev_snp_guest(vcpu->kvm))
+			goto vmgexit_err;
 		if (lower_32_bits(control->exit_info_1) != SVM_VMGEXIT_AP_DESTROY)
 			if (!kvm_ghcb_rax_is_valid(svm))
 				goto vmgexit_err;
-- 
2.25.1