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Thu, 02 Nov 2023 11:07:48 -0700 (PDT) X-Google-Smtp-Source: AGHT+IGdUEjgS7PG9GhauxVXM5EOr3ap/D3wP5H6TRULsVzmP0fxfQq4HG2TkR3twytAokRXmT0GBg== X-Received: by 2002:a2e:b012:0:b0:2c6:eab4:84a6 with SMTP id y18-20020a2eb012000000b002c6eab484a6mr3426341ljk.48.1698948468058; Thu, 02 Nov 2023 11:07:48 -0700 (PDT) Received: from starship ([89.237.99.95]) by smtp.gmail.com with ESMTPSA id n9-20020a5d4849000000b0032d8eecf901sm3078149wrs.3.2023.11.02.11.07.46 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 02 Nov 2023 11:07:47 -0700 (PDT) Message-ID: <1e8ae50b41418d7df2cc44e2bde8d8713132e5c2.camel@redhat.com> Subject: Re: [PATCH 9/9] KVM: SVM: Add CET features to supported_xss From: Maxim Levitsky To: John Allen , 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 Date: Thu, 02 Nov 2023 20:07:45 +0200 In-Reply-To: <20231010200220.897953-10-john.allen@amd.com> References: <20231010200220.897953-1-john.allen@amd.com> <20231010200220.897953-10-john.allen@amd.com> Content-Type: text/plain; charset="UTF-8" User-Agent: Evolution 3.36.5 (3.36.5-2.fc32) MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, 2023-10-10 at 20:02 +0000, John Allen wrote: > If the CPU supports CET, add CET XSAVES feature bits to the > supported_xss mask. > > Signed-off-by: John Allen > --- > 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 Reviewed-by: Maxim Levitsky Best regards, Maxim Levitsky