From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pj1-f73.google.com (mail-pj1-f73.google.com [209.85.216.73]) (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 A6FB037B3F4 for ; Fri, 15 May 2026 19:20:31 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.216.73 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778872833; cv=none; b=Id/+Z+HPOumE09dOYO8oJO/Ka4fH0hbcU2+3S3FIYPScomSE7kqeHajqfZK6JQ1aztPvymHsM47AVVD/d8SwgfigcgckrCzi5T2l5pfb51FzmzhjvJZ7g9fJzqLn0ByChOPDoyna6vrZSi/6dfFbhO9NhRYZJ3ipyu7btKG689s= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778872833; c=relaxed/simple; bh=IfVwAYhwhIxzw01+s7FehLy05itlzurZzA6D640hoDk=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=rhB1K64C/Xw6RLWgWarf2mMuEdoUhSbdxja9EvhqZ9HMEICq9010Bb9evRzojpKh6Tii663uN2ErwPTuTrzd0w/ckbr6hoAsxIYEyJzyD19nrhKH89OMydYvrIbUPZ37xaCO+kmzwLpzbaXpFtKpZYFFpDf/mt8PXSKdRgE8V6w= 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=U8YlEJ6H; arc=none smtp.client-ip=209.85.216.73 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="U8YlEJ6H" Received: by mail-pj1-f73.google.com with SMTP id 98e67ed59e1d1-3662e7756f0so82344a91.1 for ; Fri, 15 May 2026 12:20:31 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20251104; t=1778872831; x=1779477631; darn=vger.kernel.org; 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=SQlmIR1hnrcjkd+R45vwU7fSi2OSjNiqFudElplFZs0=; b=U8YlEJ6HoUh6A3rfbMaIEGAWKIKPo9Cqf3U9VjLgbA9gTesU0m1V6n0Z0/EFksMpwG 50q39fdTt/uOr8EWix+h3ZZEc+7UuNI5r2hfGqAiDP9UVZENlziy+RGmNvAOxWztKcEU uIONtnG8sodHjaEBrG8ZGIRtkOnmzbimc9BAb41bnLD8soUc1zoU+Ir8eBLN+aZLq3FO 6914PtcUZRRkK2SD++Ddsfyf/FLq0wPk/2pC0C5o14L2vCV7Dw4qfk5EXEswwJhzk2gD VPl/9JQNjc/+dtjtSvJ3WjkdqtjyXY0pv7boLFHHKQGBIcmiuSYzi3Iwmydrp1V4GyIV y15g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1778872831; x=1779477631; 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=SQlmIR1hnrcjkd+R45vwU7fSi2OSjNiqFudElplFZs0=; b=MGFnZTOOjMchuhK6B+YYLJenWaZI97pokgpPKJGm/NLf6APKNEesFFizeHoErTyojN Bf2OKRAsIMD6QyJR3DCYS1fTNWndMzLa+Wzoq0m2xiQlCaxs43fxPZ+UGKEWEHEkUgeY ElukrJpczusNcUFGQ1uLyZs6qhdO4IDI1e8tpbYNij3LH1bAJjKdAt4q4vyMA1H2QGZf cEN0r+Egcf3mC9Y45OCrSUHlXapMb9xqP4GfwDq2ekNRneIgKYBlKewHT3I2bW+QWOay R34yAN3agVE9c86h2nL4fFp7FTFEMA3oUzbdMd9tC54bO5zvhAHs2pmhdVE/SHQc5lvv ihmg== X-Forwarded-Encrypted: i=1; AFNElJ/Jh+s2SoZeSjcEaDjMb1AOBICEfsNt1FW3QAeM50tCSsZLpa8oqPSEZ9AA7LS73zKdcvzna2/kY2BYCCM=@vger.kernel.org X-Gm-Message-State: AOJu0YzkrbGH9GUaxTlFGZJEzrURElagLsZLqfyohaDAaSt8Gt5qcaH9 o2bo0BTx8jcKIuxiM1OKdPz6Mpw65awmkdmmurDTn4iDxcu8yZtX01GpohqNJuyQx6WSS7do5OK QgqKcPA== X-Received: from pgmt14.prod.google.com ([2002:a63:224e:0:b0:c80:2399:151]) (user=seanjc job=prod-delivery.src-stubby-dispatcher) by 2002:a17:90b:2fc4:b0:368:85fb:7b8b with SMTP id 98e67ed59e1d1-36951cb936amr5644652a91.22.1778872830766; Fri, 15 May 2026 12:20:30 -0700 (PDT) Reply-To: Sean Christopherson Date: Fri, 15 May 2026 12:19:07 -0700 In-Reply-To: <20260515191942.1892718-1-seanjc@google.com> Precedence: bulk X-Mailing-List: linux-hyperv@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20260515191942.1892718-1-seanjc@google.com> X-Mailer: git-send-email 2.54.0.563.g4f69b47b94-goog Message-ID: <20260515191942.1892718-7-seanjc@google.com> Subject: [PATCH v3 06/41] x86/acrn: Mark TSC frequency as known when using ACRN for calibration From: Sean Christopherson To: Kiryl Shutsemau , Paolo Bonzini , Sean Christopherson , "K. Y. Srinivasan" , Haiyang Zhang , Wei Liu , Dexuan Cui , Long Li , Ajay Kaher , Alexey Makhalov , Jan Kiszka , Dave Hansen , Andy Lutomirski , Peter Zijlstra , Juergen Gross , Daniel Lezcano , Thomas Gleixner , John Stultz Cc: Rick Edgecombe , Vitaly Kuznetsov , Broadcom internal kernel review list , Boris Ostrovsky , Stephen Boyd , x86@kernel.org, linux-coco@lists.linux.dev, kvm@vger.kernel.org, linux-hyperv@vger.kernel.org, virtualization@lists.linux.dev, linux-kernel@vger.kernel.org, xen-devel@lists.xenproject.org, Michael Kelley , Tom Lendacky , Nikunj A Dadhania , Thomas Gleixner , David Woodhouse 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); } -- 2.54.0.563.g4f69b47b94-goog