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From: John Allen <john.allen@amd.com>
To: <kvm@vger.kernel.org>
Cc: <linux-kernel@vger.kernel.org>, <pbonzini@redhat.com>,
	<weijiang.yang@intel.com>, <rick.p.edgecombe@intel.com>,
	<seanjc@google.com>, <x86@kernel.org>, <thomas.lendacky@amd.com>,
	<bp@alien8.de>, John Allen <john.allen@amd.com>
Subject: [PATCH 9/9] KVM: SVM: Add CET features to supported_xss
Date: Tue, 10 Oct 2023 20:02:20 +0000	[thread overview]
Message-ID: <20231010200220.897953-10-john.allen@amd.com> (raw)
In-Reply-To: <20231010200220.897953-1-john.allen@amd.com>

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

Signed-off-by: John Allen <john.allen@amd.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 00a8cef3cbb8..f63b2bbac542 100644
--- a/arch/x86/kvm/svm/svm.c
+++ b/arch/x86/kvm/svm/svm.c
@@ -5151,6 +5151,10 @@ 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


  parent reply	other threads:[~2023-10-10 20:04 UTC|newest]

Thread overview: 36+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-10-10 20:02 [PATCH 0/9] SVM guest shadow stack support John Allen
2023-10-10 20:02 ` [PATCH 1/9] KVM: x86: SVM: Emulate reads and writes to shadow stack MSRs John Allen
2023-11-02 18:00   ` Maxim Levitsky
2023-10-10 20:02 ` [PATCH 2/9] KVM: x86: SVM: Update dump_vmcb with shadow stack save area additions John Allen
2023-11-02 18:00   ` Maxim Levitsky
2023-10-10 20:02 ` [PATCH 3/9] KVM: x86: SVM: Pass through shadow stack MSRs John Allen
2023-10-12  9:01   ` Nikunj A. Dadhania
2023-10-17 18:17     ` John Allen
2023-10-18 11:27       ` Nikunj A. Dadhania
2023-11-02 18:05         ` Maxim Levitsky
2023-11-06 16:45           ` Sean Christopherson
2023-11-07 18:20             ` Maxim Levitsky
2023-11-07 23:10               ` Sean Christopherson
2023-10-10 20:02 ` [PATCH 4/9] KVM: SVM: Rename vmplX_ssp -> plX_ssp John Allen
2023-11-02 18:06   ` Maxim Levitsky
2023-10-10 20:02 ` [PATCH 5/9] KVM: SVM: Save shadow stack host state on VMRUN John Allen
2023-11-02 18:07   ` Maxim Levitsky
2024-02-26 16:56     ` John Allen
2023-10-10 20:02 ` [PATCH 6/9] KVM: SVM: Add MSR_IA32_XSS to the GHCB for hypervisor kernel John Allen
2023-10-14  0:31   ` Sean Christopherson
2023-11-02 18:10   ` Maxim Levitsky
2023-11-02 23:22     ` Sean Christopherson
2023-11-07 18:20       ` Maxim Levitsky
2024-02-15 17:39         ` John Allen
2024-02-20 16:20           ` Sean Christopherson
2024-02-20 16:33             ` John Allen
2024-02-21 16:38     ` John Allen
2023-10-10 20:02 ` [PATCH 7/9] x86/sev-es: Include XSS value in GHCB CPUID request John Allen
2023-10-12 12:59   ` Borislav Petkov
2023-10-17 18:12     ` John Allen
2023-10-17 18:49       ` Borislav Petkov
2023-11-02 18:14         ` Maxim Levitsky
2023-10-10 20:02 ` [PATCH 8/9] KVM: SVM: Use KVM-governed features to track SHSTK John Allen
2023-11-02 18:07   ` Maxim Levitsky
2023-10-10 20:02 ` John Allen [this message]
2023-11-02 18:07   ` [PATCH 9/9] KVM: SVM: Add CET features to supported_xss Maxim Levitsky

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