From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pf1-f197.google.com (mail-pf1-f197.google.com [209.85.210.197]) (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 B58C6493211 for ; Thu, 6 Aug 2026 23:36:40 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.210.197 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786059404; cv=none; b=d+DFAnAa6rrYIoeLpqvoDk3N6wmeNp1CdKmUeb5x7p1LVh9t84vWfmKRjR7e6TvmheZHoy7z1BendOBmb73/QdXo8QLWKZZz62xSpRNyOi4NxpCV7ZOTTUXsK7F4qw5cieRtnKDUnDwIsSbRqm3Kl50UA0/Hin3iw3qEoYBvkVk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786059404; c=relaxed/simple; bh=4z1GlPe+fx1kTpwR5eIkMwvFEvBptpYbjy53SQyI3Fc=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=HiWBnziT7P01iCc5DjMejSd3pSxfJTN840K7e09wn6Ix/+N9822YoXV+/cBU5lNpyrWDIWwIQbanvjP7g3aO5ntKsyizuEnVLw0Lf/uL6CGyNBMKaX+v0S771tiK6kiRUJOQ2enSRNNxSV9wVvKoQHszKZfCpfH7W4Iw+MnZ5A0= 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=CZVso5hG; arc=none smtp.client-ip=209.85.210.197 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="CZVso5hG" Received: by mail-pf1-f197.google.com with SMTP id d2e1a72fcca58-848474825ffso2105020b3a.0 for ; Thu, 06 Aug 2026 16:36:40 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20251104; t=1786059400; x=1786664200; darn=vger.kernel.org; h=content-type:cc:to:from:subject:message-id:references:mime-version :in-reply-to:date:reply-to:from:to:cc:subject:date:message-id :reply-to:content-type; bh=kmrkRlf4iOUyRYugkcn9gxIXBFL0cMozIwMb4/CeDNQ=; b=CZVso5hG5zGbxJowGYCYPV5Bw8AqpJTc/Lm0/N8poGgRplp3fgX+qD4wmH81HJl7ww sk9FyNOkDZbOcrr4W7A1WWmp/wvV/JKnRxDZH7X05meVxUSAlBuzw2bPr5yCUYimn/n6 SkM5WTgUjvwXu0Vd9VKZNZwtlha9/QaRnZQY7u85+iQBY0zaEhQGbZKppTEhAPkXQ78S 6WC0WIk5PipMQVMPaEhAiA5d7B0JRwP9VQ0uQnERNMaG9sRLDqRQLiHbJBMnhTGj3X/3 UScXGMmrwQtsmwDyOd4yXdXWVHmyn5GyocbMCgWgeVM7Ess0KWCDY2eiCGmwJCJC3J9j /9aQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1786059400; x=1786664200; h=content-type: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:content-type; bh=kmrkRlf4iOUyRYugkcn9gxIXBFL0cMozIwMb4/CeDNQ=; b=DZKdX+Ye0aHbl9KLU1Za13cm5W8SciH+RKoxvbu7S4ocvkZVrPlJ1lpyEfB6abf3Xh Bz/pBozW0bSUPj1BcVvxATbCc/RQwvrKn1Ri9grOwdUGK3SEw0cMvEQwnii6nbJuLnUR L4nhvgYgrLfUpGeUgTjE27uB3Pg4i065Ukm8s0ozkqzQtN0wO1RVdEJlQHQyouR7cPOy Sqit4OcfGE1AOTbT6Tg5DT+ORVtiwVxzH+TVvRhZ2qGE7acTD2xKDB+EMszNIvZ3Nj92 JJxgKXtdHHTgM81rmcW3n/+zeyPLEgbMF5NtCu5WgYAP6z6x2svNSA8GMCK+jnMjxBz3 ufGw== X-Forwarded-Encrypted: i=1; AHgh+RrLwRERkCMIxK3zcgWfSKPJbH3eQDMigsjXnqV1icY1QMI2+ZadyjmW8WHgBEB248b1s0HBy3qkszTind0=@vger.kernel.org X-Gm-Message-State: AOJu0YyITUMVwywoku2cnfpJ/W3A7WuqoUbWzcO+r25A85cvvoXtSrsz ps3MVv5dDRHzrNGAEH8bV3fSzyYSZaEkMkQuzUB4mGEWz7zz8cfLXALWpWyJ2nGk6WbPI+sFoE+ 0W6Xriw== X-Received: from pfbcz9.prod.google.com ([2002:aa7:9309:0:b0:847:aa6c:47fc]) (user=seanjc job=prod-delivery.src-stubby-dispatcher) by 2002:a05:6a00:4648:b0:842:63f5:d097 with SMTP id d2e1a72fcca58-84f41ba51c5mr11209793b3a.3.1786059399712; Thu, 06 Aug 2026 16:36:39 -0700 (PDT) Reply-To: Sean Christopherson Date: Thu, 6 Aug 2026 16:35:30 -0700 In-Reply-To: <20260806233609.212337-1-seanjc@google.com> Precedence: bulk X-Mailing-List: linux-hyperv@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20260806233609.212337-1-seanjc@google.com> X-Mailer: git-send-email 2.55.0.679.g6767b8d81c-goog Message-ID: <20260806233609.212337-14-seanjc@google.com> Subject: [PATCH v6 13/51] x86/acrn: Mark TSC frequency as known when using ACRN for calibration From: Sean Christopherson To: Kiryl Shutsemau , Rick Edgecombe , Sean Christopherson , Paolo Bonzini , "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: Vitaly Kuznetsov , Broadcom internal kernel review list , Boris Ostrovsky , Stephen Boyd , Miroslav Lichvar , 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 , David Woodhouse , David Woodhouse , Thomas Gleixner 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 dc71a6fdd461..3818f6ae0629 100644 --- a/arch/x86/kernel/cpu/acrn.c +++ b/arch/x86/kernel/cpu/acrn.c @@ -40,6 +40,7 @@ static void __init acrn_init_platform(void) if (acrn_tsc_khz_cpuid) { x86_init.hyper.get_tsc_khz = acrn_get_tsc_khz; x86_init.hyper.get_cpu_khz = acrn_get_tsc_khz; + setup_force_cpu_cap(X86_FEATURE_TSC_KNOWN_FREQ); } } -- 2.55.0.679.g6767b8d81c-goog