From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pj1-f74.google.com (mail-pj1-f74.google.com [209.85.216.74]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 02A0F197A76 for ; Thu, 27 Feb 2025 02:19:15 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.216.74 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1740622758; cv=none; b=Th6hUxTBne2Fa3chAovsCYKtg83RYA1G2jI1sQvFbMeC4IOxXS7Uoabs1CtU+UppxoL2Ix/h6Q4eQ6g+aYdgqGlXo/KiqF57hM9ThPiO+3R45ijt2xpXWYbLb2gbYy91R+k9yS0xGuXi9TmEQgd7nQeWB071UHUe9+FgVVw0LPc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1740622758; c=relaxed/simple; bh=X5UL+eTktXYoDPfW4LhmVxWuD5wQW055Sxbi/QZyZe8=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=AaNWCM2nJO0TFQQ+lGMusK3BZjYiO7vYovtXFvuwfF8+X4cpWau2j/+EEg3YyMFJUTSDj2GmFtEUFcT5wc0O6KNUMQ7bvDAE6+nv49DAjzEhYRKxOODGSeNdTMPubvS/8i5NnpOu21aeManYjhZiyPMGkPe86NkPLs5MYY1MTh8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--seanjc.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=jsjvxQyd; arc=none smtp.client-ip=209.85.216.74 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=flex--seanjc.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="jsjvxQyd" Received: by mail-pj1-f74.google.com with SMTP id 98e67ed59e1d1-2fc1e7efdffso1555486a91.0 for ; Wed, 26 Feb 2025 18:19:15 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1740622755; x=1741227555; darn=lists.linux.dev; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:reply-to:from:to:cc:subject:date:message-id:reply-to; bh=YtBqucRQyVVjFtgUlGbh/U8C9xbSv2L/3t5kwpG/0fs=; b=jsjvxQydjKxgyD6VVGBBnPRmwUbMoY6Osw+jLlg7uRrHEdyjF2C+I3VGhYD37j3rei bFeCRhAsmmGe8ZGaF1M7BSUGdOAfcQGaQgZ4Tq7ygIFi5rNXZfrKwe7m7ZpxPE1AytHC 72eOXGMqRlQCF0v/LJXJnduepdfERnSOg3LJdWRhZPjypyk6gCNFE1+wBBfo6A9R8EnY wCxXgA7vvLCiPD9ajnR0bsgimsigCAK7w9pKnZ9lmTrpxEc+j+paARMDN8KHft49tUwv qutxUl6xqUyWMc1jksv0uCTHGsxucPN26QdbUaC5dVkzrFmhVlEwIomuRPjCVfHAsazY r39Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1740622755; x=1741227555; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:reply-to:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=YtBqucRQyVVjFtgUlGbh/U8C9xbSv2L/3t5kwpG/0fs=; b=EfS3QVswAB1SC2I9AxRP7GAx7V1fTSRx2BaAsvLgN/xy+c8KXAydQwaeGpHy0IcWvH fT0xajvaqlqxVQ4Zso6nZLh/aBtti2+dmMMyr2Xk965Rfl1pbR6vlBTg+96M3XvX+m9g n4uScgWYHSxnPSZ/a/V4EgUpjq3Sez9fHfjp+GajqSU+4CCAbpf4faXjg/SGwHCPE44J R43Dbiq5RHbai2o1CJ9q3iA9wXiMc3lQmSWv0xktqWDjlrLlN4q7EmPtYLegSBsnYPLU gRGOtZfzc262gE1eN+iZYDcX/CPPxe2buJYiRDyuA4jb6VKzwuhpLqWBjlNldMTymVDW z88w== X-Forwarded-Encrypted: i=1; AJvYcCXJW+VD5Ahxk6q8VL2IcZjyXOz2CoHB9ldV4Wuu9d5ffjeFhCs6wbIVtob/nWzHhEuUA6Y/CJ4ry9JR@lists.linux.dev X-Gm-Message-State: AOJu0YxzETjabu0V38yeYpQwycvFSw71eRdarmrR6SsNqnpo1S2fPy0N J5FF/4UvV4u22fW+/xoSB1HKwQH7VIep9JUIVkRZWvwX+rJ8yXnNPJBGOIT/XUrLXGHxns4/eKX 3PQ== 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> Precedence: bulk X-Mailing-List: linux-coco@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: 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 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); + setup_force_cpu_cap(X86_FEATURE_TSC_KNOWN_FREQ); tsc_register_calibration_routines(acrn_get_tsc_khz, acrn_get_tsc_khz); } -- 2.48.1.711.g2feabab25a-goog