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Fri, 20 Mar 2026 17:10:24 -0700 (PDT) X-Received: by 2002:a05:6000:4283:b0:43b:6320:d937 with SMTP id ffacd0b85a97d-43b6423a2e7mr8303011f8f.19.1774051823732; Fri, 20 Mar 2026 17:10:23 -0700 (PDT) Received: from [192.168.10.48] ([151.49.85.67]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-43b647177e8sm10573531f8f.34.2026.03.20.17.10.19 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 20 Mar 2026 17:10:19 -0700 (PDT) From: Paolo Bonzini To: linux-kernel@vger.kernel.org, kvm@vger.kernel.org Cc: Jon Kohler , Marcelo Tosatti , Nikunj A Dadhania , Amit Shah , Sean Christopherson , "Borislav Petkov (AMD)" Subject: [PATCH 18/22] KVM: SVM: add GMET bit definitions Date: Sat, 21 Mar 2026 01:09:27 +0100 Message-ID: <20260321000931.1947084-19-pbonzini@redhat.com> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260321000931.1947084-1-pbonzini@redhat.com> References: <20260321000931.1947084-1-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. Cc: Borislav Petkov (AMD) Signed-off-by: Paolo Bonzini Acked-by: Borislav Petkov (AMD) --- 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 123c023fe42c..95469c7d357f 100644 --- a/arch/x86/include/asm/cpufeatures.h +++ b/arch/x86/include/asm/cpufeatures.h @@ -382,6 +382,7 @@ #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) /* "gmet" 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 e2a29e1144a7..47353bef947c 100644 --- a/arch/x86/include/asm/svm.h +++ b/arch/x86/include/asm/svm.h @@ -239,6 +239,7 @@ 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 2.52.0