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AJvYcCXAzkqlPMWVXvmXbw0pQkCREZRoJ/AZE+TvZrbNoimCnaceNMyTULUb1j9fHqTR/iGR6gKWAjYLy5E=@lists.xenproject.org X-Gm-Message-State: AOJu0YzqA5V5syJqpEV6nb/AbtlXHHkTpAit+jo3rMH8i14FP2gxzhS+ MhnHdYQEuHMcxzzHntarja+B7Uxmoi0hjNilQ0WDIfQP3aGA4TELDBjg3rF//48H+yxGcEkOoE6 K9w== X-Google-Smtp-Source: AGHT+IGkjSAAWxmwHiu0qCv61xkb4iGGZ5alFNn1UCDa8mCUkr+gLXYmTCgtlrE3otTrUQeGakGB8oHEBGw= X-Received: from pjj16.prod.google.com ([2002:a17:90b:5550:b0:2e5:8726:a956]) (user=seanjc job=prod-delivery.src-stubby-dispatcher) by 2002:a17:902:db04:b0:216:4c88:d93a with SMTP id d9443c01a7336-21dd7dd7356mr228949515ad.48.1738376254204; Fri, 31 Jan 2025 18:17:34 -0800 (PST) Reply-To: Sean Christopherson Date: Fri, 31 Jan 2025 18:17:06 -0800 In-Reply-To: <20250201021718.699411-1-seanjc@google.com> Mime-Version: 1.0 References: <20250201021718.699411-1-seanjc@google.com> X-Mailer: git-send-email 2.48.1.362.g079036d154-goog Message-ID: <20250201021718.699411-5-seanjc@google.com> Subject: [PATCH 04/16] x86/sev: Mark TSC as reliable when configuring Secure TSC From: Sean Christopherson To: Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , x86@kernel.org, "Kirill A. Shutemov" , Juergen Gross , "K. Y. Srinivasan" , Haiyang Zhang , Wei Liu , Dexuan Cui , Ajay Kaher , Alexey Makhalov , Jan Kiszka , Paolo Bonzini , Andy Lutomirski , Peter Zijlstra Cc: linux-kernel@vger.kernel.org, linux-coco@lists.linux.dev, virtualization@lists.linux.dev, linux-hyperv@vger.kernel.org, jailhouse-dev@googlegroups.com, kvm@vger.kernel.org, xen-devel@lists.xenproject.org, Sean Christopherson , Nikunj A Dadhania , Tom Lendacky X-ZohoMail-DKIM: pass (identity @google.com) X-ZM-MESSAGEID: 1738376282461019000 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Move the code to mark the TSC as reliable from sme_early_init() to snp_secure_tsc_init(). The only reader of TSC_RELIABLE is the aptly named check_system_tsc_reliable(), which runs in tsc_init(), i.e. after snp_secure_tsc_init(). This will allow consolidating the handling of TSC_KNOWN_FREQ and TSC_RELIABLE when overriding the TSC calibration routine. Cc: Nikunj A Dadhania Cc: Tom Lendacky Signed-off-by: Sean Christopherson Reviewed-by: Nikunj A Dadhania --- arch/x86/coco/sev/core.c | 2 ++ arch/x86/mm/mem_encrypt_amd.c | 3 --- 2 files changed, 2 insertions(+), 3 deletions(-) diff --git a/arch/x86/coco/sev/core.c b/arch/x86/coco/sev/core.c index 684cef70edc1..e6ce4ca72465 100644 --- a/arch/x86/coco/sev/core.c +++ b/arch/x86/coco/sev/core.c @@ -3288,6 +3288,8 @@ void __init snp_secure_tsc_init(void) return; =20 setup_force_cpu_cap(X86_FEATURE_TSC_KNOWN_FREQ); + setup_force_cpu_cap(X86_FEATURE_TSC_RELIABLE); + rdmsrl(MSR_AMD64_GUEST_TSC_FREQ, tsc_freq_mhz); snp_tsc_freq_khz =3D (unsigned long)(tsc_freq_mhz * 1000); =20 diff --git a/arch/x86/mm/mem_encrypt_amd.c b/arch/x86/mm/mem_encrypt_amd.c index b56c5c073003..774f9677458f 100644 --- a/arch/x86/mm/mem_encrypt_amd.c +++ b/arch/x86/mm/mem_encrypt_amd.c @@ -541,9 +541,6 @@ void __init sme_early_init(void) * kernel mapped. */ snp_update_svsm_ca(); - - if (sev_status & MSR_AMD64_SNP_SECURE_TSC) - setup_force_cpu_cap(X86_FEATURE_TSC_RELIABLE); } =20 void __init mem_encrypt_free_decrypted_mem(void) --=20 2.48.1.362.g079036d154-goog