linux-kernel - [PATCH v2 9/9] KVM: SVM: Add CET features to supported

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20240226213244.18441-10-john.allen@amd.com>
Date: Mon, 26 Feb 2024 21:32:44 +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 9/9] KVM: SVM: Add CET features to supported_xss

If the CPU supports CET, add CET XSAVES feature bits to the
supported_xss mask.

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 1181f017c173..d97d82ebec4a 100644
--- a/arch/x86/kvm/svm/svm.c
+++ b/arch/x86/kvm/svm/svm.c
@@ -5177,6 +5177,10 @@ static __init void svm_set_cpu_caps(void)
 	    boot_cpu_has(X86_FEATURE_AMD_SSBD))
 		kvm_cpu_cap_set(X86_FEATURE_VIRT_SSBD);
 
+	if (kvm_cpu_cap_has(X86_FEATURE_SHSTK))
+		kvm_caps.supported_xss |= XFEATURE_MASK_CET_USER |
+					  XFEATURE_MASK_CET_KERNEL;
+
 	if (enable_pmu) {
 		/*
 		 * Enumerate support for PERFCTR_CORE if and only if KVM has
-- 
2.40.1