From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pf1-f198.google.com (mail-pf1-f198.google.com [209.85.210.198]) (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 0FA4F493218 for ; Thu, 6 Aug 2026 23:36:40 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.210.198 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786059405; cv=none; b=Xh1iwb26G4JHAohpvZHhvvSR4XTaU//G7CxO1KQcY5cAE3CUb6ld7N5rG7E2QgDIGlCDuH7Tc5vvJGCYODpHzaCTtZd7w9FxQep719fsx9QFn7GWdfMVUOgClrKWHw+zrhOuiiW9BXXpeNmjx4EucKd5qSwIZPGcSsnFyLIpURQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786059405; c=relaxed/simple; bh=4z1GlPe+fx1kTpwR5eIkMwvFEvBptpYbjy53SQyI3Fc=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=kdGJPTSkvzn1KRcBERUu4AfiBKlSpCVAdh9A2Qlss2JwJB0te8mKYXfLp31mW6rrITNMa3mIODqgcuBKnDa/27f1xPSHJ3ICAYIfnqVaCT07u7aw0G5e2hkdtXB6HR7j+y5wP+DJug4h+XsDg36cISm7JCFbNRhXO87H6E25K1Y= 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=c25MTk3C; arc=none smtp.client-ip=209.85.210.198 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="c25MTk3C" Received: by mail-pf1-f198.google.com with SMTP id d2e1a72fcca58-848474825ffso2105013b3a.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=lists.linux.dev; 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=c25MTk3CQ/LA6OSs9zA8jUKUc53ZZm4T64HOvFTjVhhRGzgL9Q7ymR4wivxK0buTKw EfDxCQOb5amF6HF6X6eMeHxxeUtOhGSWYq/ITxywjZA6bOQ3aD6O9Ni0P80QgCyCnLTm 22EBnCIS+yTWA6sIH78Fyb8Y/PinCGtbp8jP25XdFFkI+i0Qz8BRk7bvIKQRU1fJf1wq /FuqWPYg9GZrBcEoPWWRJG5JZuaQkH6ETnh94Oh3d3DCHesIsjjhjcGJoOSkmA0PeYl/ eCu9To3O0+nPMKEO8cgVugbLle/P/OhJFbhUM+DK5p9XS+lb7P9oQLiqcA9td2WvuaiF 9ltQ== 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=RX1ZQaaPnaEcxddk/KRUhJNAFaJtheXYymIqtXU2OES4rDXKLB815L77aBRHpRwbs/ 7mvpEmTT7o5dwZnf1L5x91RnZPIbku7Jj3F7/23NC92iY7yuaS5a0dLbyoBHnNla/Z0Q 9SHGHTnSMa8F47k622dm009aWzRr9zG7kZJBEse5453x+RB8cLeUItH2slIWlOk5GXZS kU2At/COFg0z10+bsG9/9AtTlkk+uu5Jtp0m7yImkbqPQTwvR+9wdo/bwznucF3o9Jcy hp+Twg3Au1wAz5RvZLzjMpKiwSmN124D7lKoqs+D2jAA+Ab2X+sv4Z+ozZ+mQ8C2X1Sw kQWA== X-Forwarded-Encrypted: i=1; AHgh+RrVmd9MePWj5YD8QIajWdvjcTHDS5gqMrDLEVLAG+amL7LlqfdTz7VlLi9pmX73WRAkqo0kPTPT3Yll@lists.linux.dev X-Gm-Message-State: AOJu0YzXOYNbsE+b2sQkBiXrmXJRscr5V0/byNjoPzhv57jotXcLfgY5 Q5Dk76lVlFd6OZOImmExzEOp8TK641gOI94s9HSZpG/N4Ela5flRXadZ6QzsnZ3ixwiUxQmhdew AFO7WHw== 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-coco@lists.linux.dev 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