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: [RFC PATCH v3 8/8] KVM: SVM: Add CET features to supported_xss
Date: Thu, 17 Aug 2023 18:18:20 +0000 [thread overview]
Message-ID: <20230817181820.15315-9-john.allen@amd.com> (raw)
In-Reply-To: <20230817181820.15315-1-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>
---
v2:
- Remove curly braces around if statement
---
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 683bf18b965d..685f8715a716 100644
--- a/arch/x86/kvm/svm/svm.c
+++ b/arch/x86/kvm/svm/svm.c
@@ -5105,6 +5105,10 @@ 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
--
2.39.1
prev parent reply other threads:[~2023-08-17 18:20 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-08-17 18:18 [RFC PATCH v3 0/8] SVM guest shadow stack support John Allen
2023-08-17 18:18 ` [RFC PATCH v3 1/8] KVM: x86: SVM: Emulate reads and writes to shadow stack MSRs John Allen
2023-08-17 18:18 ` [RFC PATCH v3 2/8] KVM: x86: SVM: Update dump_vmcb with shadow stack save area additions John Allen
2023-08-17 18:18 ` [RFC PATCH v3 3/8] KVM: x86: SVM: Pass through shadow stack MSRs John Allen
2023-08-17 18:18 ` [RFC PATCH v3 4/8] KVM: SVM: Rename vmplX_ssp -> plX_ssp John Allen
2023-08-17 18:18 ` [RFC PATCH v3 5/8] KVM: SVM: Save shadow stack host state on VMRUN John Allen
2023-08-17 18:18 ` [RFC PATCH v3 6/8] KVM: SVM: Add MSR_IA32_XSS to the GHCB for hypervisor kernel John Allen
2023-08-17 18:18 ` [RFC PATCH v3 7/8] x86/sev-es: Include XSS value in GHCB CPUID request John Allen
2023-08-17 18:18 ` John Allen [this message]
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