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AJvYcCWSddeo1xTdiZzmF8K2MGuhusacUqxHWVss+i13ZoyOxCND/xPAxxKwAJmURtuCveSB24glFszolv0=@lists.xenproject.org X-Gm-Message-State: AOJu0YzKcbGmPcpzX/KDEu9i14Tm8Z6ocCSJKs1UvRMkrGvKhXvueoQV tiJVHlaXY31tJn0+GJflYy1YzR3nuwoJdOqeFLzcTjnN6jPio9lHFS75ktIukZO3lm3UwvvuLbK 5oA== X-Google-Smtp-Source: AGHT+IH9Y0SwBcAS02xHNq+a4IakpnWSLKqVw4P68iCQM2m6waYT1AwLAOPZPnrjzYdSpJiao+kBYkSTr34= X-Received: from pjb4.prod.google.com ([2002:a17:90b:2f04:b0:2ef:78ff:bc3b]) (user=seanjc job=prod-delivery.src-stubby-dispatcher) by 2002:a17:90b:2dc8:b0:2fa:ba3:5457 with SMTP id 98e67ed59e1d1-2fe68ae6c4fmr17520974a91.17.1740622755379; Wed, 26 Feb 2025 18:19:15 -0800 (PST) Reply-To: Sean Christopherson Date: Wed, 26 Feb 2025 18:18:23 -0800 In-Reply-To: <20250227021855.3257188-1-seanjc@google.com> Mime-Version: 1.0 References: <20250227021855.3257188-1-seanjc@google.com> X-Mailer: git-send-email 2.48.1.711.g2feabab25a-goog Message-ID: <20250227021855.3257188-8-seanjc@google.com> Subject: [PATCH v2 07/38] x86/acrn: Mark TSC frequency as known when using ACRN for calibration From: Sean Christopherson To: Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , x86@kernel.org, "Kirill A. Shutemov" , Paolo Bonzini , Sean Christopherson , Juergen Gross , "K. Y. Srinivasan" , Haiyang Zhang , Wei Liu , Dexuan Cui , Ajay Kaher , Jan Kiszka , Andy Lutomirski , Peter Zijlstra , Daniel Lezcano , John Stultz Cc: linux-kernel@vger.kernel.org, linux-coco@lists.linux.dev, kvm@vger.kernel.org, virtualization@lists.linux.dev, linux-hyperv@vger.kernel.org, xen-devel@lists.xenproject.org, Tom Lendacky , Nikunj A Dadhania X-ZohoMail-DKIM: pass (identity @google.com) X-ZM-MESSAGEID: 1740622795465019000 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Mark the TSC frequency as known when using ACRN's PV CPUID information. Per commit 81a71f51b89e ("x86/acrn: Set up timekeeping") and common sense, the TSC freq is explicitly provided by the hypervisor. Signed-off-by: Sean Christopherson --- arch/x86/kernel/cpu/acrn.c | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/x86/kernel/cpu/acrn.c b/arch/x86/kernel/cpu/acrn.c index c1506cb87d8c..2da3de4d470e 100644 --- a/arch/x86/kernel/cpu/acrn.c +++ b/arch/x86/kernel/cpu/acrn.c @@ -29,6 +29,7 @@ static void __init acrn_init_platform(void) /* Install system interrupt handler for ACRN hypervisor callback */ sysvec_install(HYPERVISOR_CALLBACK_VECTOR, sysvec_acrn_hv_callback); =20 + setup_force_cpu_cap(X86_FEATURE_TSC_KNOWN_FREQ); tsc_register_calibration_routines(acrn_get_tsc_khz, acrn_get_tsc_khz); } --=20 2.48.1.711.g2feabab25a-goog