From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pg1-f201.google.com (mail-pg1-f201.google.com [209.85.215.201]) (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 F33DE4DA556 for ; Wed, 1 Jul 2026 19:32:42 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.215.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1782934365; cv=none; b=fFAo1PSQjoI2UgSS4eNa84RdLHS3SCuzY+wonD7o+1cljoeBWM8mjf7aLhpQBDGckxhSc/Ba9mc1AJsJMWCxITCcVpkAtfcGBJuG321xz/gM5em16nqZpMdK0OfCeEjpkjoxaUGKlWqu4ZRhaf8cCspVChbkhj5zUjW4+G9ufBA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1782934365; c=relaxed/simple; bh=CiGkqE/6AT+VqdBT08JjtFv5kCcpPymLLHYJ+kIZoXI=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=o9Yb0aBifcVkMK57W7RJjBOPoUs6KQLUh+eWJbLe8YEhc/8jrLT/C2JWxHX4Mzf3hvIAhpW1TE4f+hQCBJ8iT7L5b/F/Juhs+gRAtExfaFqAg+Tx33IVKEe31Mjo9JnBnozAMU24eJrkrwLN/kgGHWBdP2SslPjDDKmYnIVJCYg= 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=lVMfEvpv; arc=none smtp.client-ip=209.85.215.201 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="lVMfEvpv" Received: by mail-pg1-f201.google.com with SMTP id 41be03b00d2f7-c89956023dbso900182a12.0 for ; Wed, 01 Jul 2026 12:32:42 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20251104; t=1782934362; x=1783539162; 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=FaUjTU3QKJy+ktbmudl/+1GzmAqwQnS7of3spvtM7gQ=; b=lVMfEvpvQXxC5+fETpqFyjEWlQJQPq/56kpXbPp/syIzIFrxLUvGB0bs+pu1IlN7Ci n49bmLOeisfthvCPlLb+S2VTHC234yAsPZCM/vwPD3JPebyikdXfmgooYPqtVB7TOCPM RVMckaado0UrAOEc1gbhWrJJLPYBLc3DUFbruOdhSi0uDpikg/C+HLJTpMFh2i5w/zQI jmORdLYQexgDboBfkhh8OYf8idrsE7xfTxfcbJod3FMKh5NQrlIs7pO3vh+6ea/MbE6M xI0vCq37W7vTmgZQWSFNwnvK36WD4tfF6RITzSojHfu7ZVkEXM9Q77lHO8F69g4onlCR Nz5g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1782934362; x=1783539162; 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=FaUjTU3QKJy+ktbmudl/+1GzmAqwQnS7of3spvtM7gQ=; b=LrjsI8SJFfkhKG/1wifr56BVQguE/NnRmxafnIdpkvIlrL2LAxdAR909nSFcvupLCb tMNViuj3lCQgwJ9O9qpSUYBJoCIgEySAHe7wY7KS+UrM5vyRIUpFv2nKd2kKKz8cbl3p Q0gNJ7iARhrrRCAcLJ03CYOczwr/V8zmui2awguqw3p61Uo81fvQZF13RSzTNF6TgBPl AWQhCBHUiwmo8Tl4MDics6iU7FPHwQoF/NvaCuJ1yUvgLxmsW6cHIGMwxzXjCTwHzkRE nDQKEIvKHH+n6gIfYEUHRiq81vwqTR+xaTaOGrb7efL6Q022zTFkc9/Fws1C4cVQiUHk Ff8w== X-Forwarded-Encrypted: i=1; AFNElJ+nvuJYIp5WZmUWdTeXX7I9jq3zmY/iZIan5Oj32MR++ZpWNxrMLGHvvekuCruYeDN43MxHH3ehB9o=@vger.kernel.org X-Gm-Message-State: AOJu0YyXlaHaTatEeXPdlezcvZrhMhuxyix+9xxYahjaOTpN/GyPG3ev zihmj3IhxOQopCS2WjNsvJspeJ+1BbOPuSUSPKcL3+1r6KJ3V5OEVnFuIpV5onrncTWfI5aCMpp 5oHrzvg== X-Received: from pghx17.prod.google.com ([2002:a63:f711:0:b0:c9a:53ea:434a]) (user=seanjc job=prod-delivery.src-stubby-dispatcher) by 2002:a05:6a21:1b84:b0:398:9b42:69f7 with SMTP id adf61e73a8af0-3bfed3b19b0mr3536321637.39.1782934362055; Wed, 01 Jul 2026 12:32:42 -0700 (PDT) Reply-To: Sean Christopherson Date: Wed, 1 Jul 2026 12:31:34 -0700 In-Reply-To: <20260701193212.749551-1-seanjc@google.com> Precedence: bulk X-Mailing-List: linux-doc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20260701193212.749551-1-seanjc@google.com> X-Mailer: git-send-email 2.55.0.rc0.799.gd6f94ed593-goog Message-ID: <20260701193212.749551-14-seanjc@google.com> Subject: [PATCH v5 13/51] x86/acrn: Mark TSC frequency as known when using ACRN for calibration From: Sean Christopherson To: Jonathan Corbet , Paolo Bonzini , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , x86@kernel.org, Kiryl Shutsemau , Rick Edgecombe , Sean Christopherson , "K. Y. Srinivasan" , Haiyang Zhang , Wei Liu , Dexuan Cui , Long Li , Ajay Kaher , Alexey Makhalov , Jan Kiszka , Andy Lutomirski , Peter Zijlstra , Juergen Gross , Daniel Lezcano , John Stultz Cc: Shuah Khan , "H. Peter Anvin" , Vitaly Kuznetsov , Broadcom internal kernel review list , Boris Ostrovsky , Stephen Boyd , linux-doc@vger.kernel.org, kvm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-coco@lists.linux.dev, linux-hyperv@vger.kernel.org, virtualization@lists.linux.dev, xen-devel@lists.xenproject.org, Tom Lendacky , Nikunj A Dadhania , David Woodhouse , David Woodhouse , Michael Kelley , 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.rc0.799.gd6f94ed593-goog