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 A708B38D40F 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=Wz7Uf0F13mHQ8GJR4Q09zKXXA8ZVqmvHgt69RwznjuNl8w15A7FYg+OteP+qhvlIFyKw7MoyIaE+/0/d6JugrS5C+ijxL/MdGOWE5l02o0U5o8XM9wWNUbEkQvQ+aY8Nmh6rwH38+zMgS0mgFFb+t4/wgVWU9G/jvwPPckOkc50= 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=X5Imlt3t; 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="X5Imlt3t" Received: by mail-pj1-f73.google.com with SMTP id 98e67ed59e1d1-3684cb22502so72787a91.2 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=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=SQlmIR1hnrcjkd+R45vwU7fSi2OSjNiqFudElplFZs0=; b=X5Imlt3t6JoTN/ZSwk6ROlo/AFcT49pObftvDWX1ZujOJ1lebxZEKsnmicEbK+re4J EYrcm7hY9Y5cMK3VCVDVeClGPGe7LD+6izsyrGE3Z5yKbu+EIgAVEGdIy/2pBCo01CTV ychn/UI0KjtMfx/TdtFhn6yIPJd8y958ZOVtAnANdxKb5/yFxMwSxhia2SGe65WrxtgR xKidJm8yqCiSNjE24r0NyfzCQfpYWDivtcoVhPbTNICcpjf77geQ8rPh2l2LdTQ/xE1t wIld/6E5aLEWzz3z+HcwiPz7ba8CFccKwm/zYtGv+1r55fuNrE7bethk4UhgckT+FKRT YQGw== 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=eXyKKWNQ4BDvP8O4miSWjfoxXZnrzRTfCC0RJPOPSDdO1HLPCXQdGXGc6QpbV8Xro4 IVXsyZ7vdCSZrdux20BYlaRLoLrumTj+wz7CxwRp3huZTkELQAF4m4VahYal8rkr/htl seh6+FB6kKQvlwplKKoKE54YZV6ELzT4bSpLd3hUfwA/9b4CTVc2xxGFw0mm0ZUdEMI+ 5jMvpkE7dS3y7EcuaotgK6cf3Wp3ZhzjmYoE+nVB790Ikct7TmGDus4qastgcFmqu+Kl xRpeVyhYkSRZXjUyag8ysAMgpdOue/UyGS+NxVQWsYXMupODloj4yFymm2WtYcM9kKYC 9UuA== X-Forwarded-Encrypted: i=1; AFNElJ+605NfctfpYx4yjKl3LwzTJmyQOzuQ88PVCGm7w78YRp7tlp5hEn5zmLQYq/U5AccyNRUuUgkpKFiJ@lists.linux.dev X-Gm-Message-State: AOJu0YwxSHPNR3T4ItAF7GsXAjUlb8NCCfrb/R6jc9n/xIUtFhUpU/mC IZXs/23cA+OWNXUyZfNFPzQyhEc2kKZNJB9P4DK+lQFR64IScRno2qC+t+BAkPIFiqCVW92spRk 9uFFBDA== 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-coco@lists.linux.dev 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