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 v2 6/6] KVM: SVM: Add CET features to supported_xss
Date: Wed, 24 May 2023 15:53:39 +0000 [thread overview]
Message-ID: <20230524155339.415820-7-john.allen@amd.com> (raw)
In-Reply-To: <20230524155339.415820-1-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 6afd2c44fdb6..cee496bee0a9 100644
--- a/arch/x86/kvm/svm/svm.c
+++ b/arch/x86/kvm/svm/svm.c
@@ -5070,6 +5070,10 @@ 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;
+
/* AMD PMU PERFCTR_CORE CPUID */
if (enable_pmu && boot_cpu_has(X86_FEATURE_PERFCTR_CORE))
kvm_cpu_cap_set(X86_FEATURE_PERFCTR_CORE);
--
2.39.1
next prev parent reply other threads:[~2023-05-24 15:55 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-05-24 15:53 [RFC PATCH v2 0/6] SVM guest shadow stack support John Allen
2023-05-24 15:53 ` [RFC PATCH v2 1/6] KVM: x86: SVM: Emulate reads and writes to shadow stack MSRs John Allen
2023-05-24 15:53 ` [RFC PATCH v2 2/6] KVM: x86: SVM: Update dump_vmcb with shadow stack save area additions John Allen
2023-05-24 15:53 ` [RFC PATCH v2 3/6] KVM: x86: SVM: Pass through shadow stack MSRs John Allen
2023-06-24 0:05 ` Sean Christopherson
2023-08-01 15:25 ` John Allen
2023-08-01 16:42 ` Sean Christopherson
2023-08-01 16:51 ` John Allen
2023-05-24 15:53 ` [RFC PATCH v2 4/6] KVM: SVM: Save shadow stack host state on VMRUN John Allen
2023-06-23 21:11 ` Sean Christopherson
2023-08-01 15:19 ` John Allen
2023-08-01 16:28 ` Sean Christopherson
2023-08-01 17:03 ` John Allen
2023-08-02 2:18 ` Yang, Weijiang
2023-08-02 16:38 ` Sean Christopherson
2023-08-03 5:11 ` Yang, Weijiang
2023-05-24 15:53 ` [RFC PATCH v2 5/6] KVM: SVM: Add MSR_IA32_XSS to the GHCB for hypervisor kernel John Allen
2023-05-24 15:53 ` John Allen [this message]
2023-05-24 17:24 ` [RFC PATCH v2 6/6] KVM: SVM: Add CET features to supported_xss Edgecombe, Rick P
2023-06-09 15:34 ` John Allen
2023-06-09 16:46 ` Edgecombe, Rick P
2023-06-23 22:18 ` Sean Christopherson
2023-06-26 15:57 ` Tom Lendacky
2023-06-26 16:28 ` Sean Christopherson
2023-06-26 16:45 ` Tom Lendacky
2023-06-26 18:22 ` Sean Christopherson
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