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Thu, 26 Mar 2026 11:18:19 -0700 (PDT) X-Received: by 2002:a05:600c:8b2a:b0:486:ff92:63e5 with SMTP id 5b1f17b1804b1-48715fc32admr129513005e9.6.1774549099053; Thu, 26 Mar 2026 11:18:19 -0700 (PDT) Received: from [192.168.10.48] ([151.49.85.67]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-487209378e2sm18783295e9.31.2026.03.26.11.18.17 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 26 Mar 2026 11:18:18 -0700 (PDT) From: Paolo Bonzini To: linux-kernel@vger.kernel.org, kvm@vger.kernel.org Cc: Jon Kohler , Nikunj A Dadhania , Amit Shah , Sean Christopherson , Marcelo Tosatti , "Borislav Petkov (AMD)" Subject: [PATCH 20/24] KVM: SVM: add GMET bit definitions Date: Thu, 26 Mar 2026 19:17:18 +0100 Message-ID: <20260326181723.218115-21-pbonzini@redhat.com> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260326181723.218115-1-pbonzini@redhat.com> References: <20260326181723.218115-1-pbonzini@redhat.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" GMET (Guest Mode Execute Trap) is an AMD virtualization feature, essentially the nested paging version of SMEP. Hyper-V uses it; add it in preparation for making it available to hypervisors running under KVM. Acked-by: Borislav Petkov (AMD) Signed-off-by: Paolo Bonzini --- arch/x86/include/asm/cpufeatures.h | 1 + arch/x86/include/asm/svm.h | 1 + 2 files changed, 2 insertions(+) diff --git a/arch/x86/include/asm/cpufeatures.h b/arch/x86/include/asm/cpuf= eatures.h index dbe104df339b..9f876fbdcc3a 100644 --- a/arch/x86/include/asm/cpufeatures.h +++ b/arch/x86/include/asm/cpufeatures.h @@ -379,6 +379,7 @@ #define X86_FEATURE_AVIC (15*32+13) /* "avic" Virtual Interrupt Controlle= r */ #define X86_FEATURE_V_VMSAVE_VMLOAD (15*32+15) /* "v_vmsave_vmload" Virtua= l VMSAVE VMLOAD */ #define X86_FEATURE_VGIF (15*32+16) /* "vgif" Virtual GIF */ +#define X86_FEATURE_GMET (15*32+17) /* Guest Mode Execution Trap */ #define X86_FEATURE_X2AVIC (15*32+18) /* "x2avic" Virtual x2apic */ #define X86_FEATURE_V_SPEC_CTRL (15*32+20) /* "v_spec_ctrl" Virtual SPEC_= CTRL */ #define X86_FEATURE_VNMI (15*32+25) /* "vnmi" Virtual NMI */ diff --git a/arch/x86/include/asm/svm.h b/arch/x86/include/asm/svm.h index edde36097ddc..03e9e0112b10 100644 --- a/arch/x86/include/asm/svm.h +++ b/arch/x86/include/asm/svm.h @@ -242,6 +242,7 @@ struct __attribute__ ((__packed__)) vmcb_control_area { #define SVM_NESTED_CTL_NP_ENABLE BIT(0) #define SVM_NESTED_CTL_SEV_ENABLE BIT(1) #define SVM_NESTED_CTL_SEV_ES_ENABLE BIT(2) +#define SVM_NESTED_CTL_GMET_ENABLE BIT(3) =20 =20 #define SVM_TSC_RATIO_RSVD 0xffffff0000000000ULL --=20 2.53.0