From patchwork Sat Feb 1 02:17:09 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sean Christopherson X-Patchwork-Id: 13956072 Received: from mail-pj1-f74.google.com (mail-pj1-f74.google.com [209.85.216.74]) (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 433CA15383C for ; Sat, 1 Feb 2025 02:17:40 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.216.74 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1738376261; cv=none; b=q5jLDxTToi+CioDdOixDr8Yj8ZeciQ8Kgp+IZbhxhx7JcufNAITbfD9w2n9X9hYqLZk0av7LOXn2kOLZPX7F58Yd2VhviCeNnIS8AkNc1EC3HYKqL9rIy6HELUielTI2GDPpLqnpE8PgHjeGk4vOXbIsgBBD5pzkQdATvJbAEXQ= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1738376261; c=relaxed/simple; bh=E6Iy1BiM9FEEtqnIX6/l7kPa8oyhyUi3aCV4SUPddsQ=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=sWFdgMHMRDkP3W67+Z3nNT+07aLVCNWuTcWTtQei0yRDAQZJYw7uOMQDhROaI7Zkz/IAAolRqMYEkz1k/pvdpHASXb5rHPFpJ2ODjBdfn14g6uLOdRRoqjZrZVzwVtJB54o0Y87nlfFLhA4//SwuQiJ262ezM3umeeaAKcKrhnc= 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=Lc4rnG6D; arc=none smtp.client-ip=209.85.216.74 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="Lc4rnG6D" Received: by mail-pj1-f74.google.com with SMTP id 98e67ed59e1d1-2ee9f66cb12so5228861a91.1 for ; Fri, 31 Jan 2025 18:17:40 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1738376259; x=1738981059; 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=IW8kJcAcrKvt4c0vMOL7jWV1OXPEd6lfnHsLFZy4QXA=; b=Lc4rnG6Dm6msGUFDJy1doz8yyGyZL+0sW/L70hr/9AcdgDF+5ljhpV2WFFPRn59xG2 JMdnkczVc3HsnISv79/GB/CFVO+fAEtoxVlJpu+kZF/gVUeb07RsEQ8nNNZfBAYosltb ZjFcPv6ISf6yg71vzNJ8W8xp5kUwNuFdgsrZiZWdwexHES8U+Lriigo1NV6MKdS2hmn6 jdNhdPLfKyBJtILm3vcJMJgtyQybH50lEl5sRn78WFp376vxMXH4j3Kk41GdU1i9xYoV Dm3HaUG2Ig/4PLg+3w8X+jSA5loW/lZxaUezO2K+TY0aPfhsC+4yI73UpQjUpt3SCxKG L42A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1738376259; x=1738981059; 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=IW8kJcAcrKvt4c0vMOL7jWV1OXPEd6lfnHsLFZy4QXA=; b=aKbgZN9AFuI7OeWXY0ZDdPjMj+JfLeQZ05VtNH04W++43e0rcW9nQs15hELinkAH8H CrvmPUvwVEKgUmnXTZ3KNgnXkv7zCoZUO2iTHLrXJnOiDKP+3IIz70AyZ17ZR456ktg3 nKE7uWLSWTTQW+79FRcN5a8rORXpFsbcxXVYgmz9I+/zFpAtNh4i7KeAFHF1Q9T/QrgB ZIHyBlsiJURdwh4mOcn5fACTBexPP6nLHIvqbzNassqwk48plBm/x3hloO/8fVHQ4arZ VW4+DHeOuDACoDoujVGoPymWzA+hNR1YWYQeKtUAzR0p5UYrGdhOD5EAEryNXxprZYJq ru8A== X-Forwarded-Encrypted: i=1; AJvYcCUJgRLEMPezge0lCNRBqRA/GXYHr2er2igSJXvRULVrRjuqcsg0u2wSlpyNo7K8FaEtKuM=@vger.kernel.org X-Gm-Message-State: AOJu0Yx4pmSxmKmTeaNP0FhoQBFL+CX4m7WR+9gSUOp/cgKXoxLpd6WX DeZxTQSlSapDrjp+Pp8dx58ZfGWd8YOp67bhyTBWpqZaG01h+6RHk/e0/KZcicHxcROHIqk31TB 1+Q== X-Google-Smtp-Source: AGHT+IF5rIJ4SRqkvzrTVMPpN2jn4obzhnrXzWmKwhKWojp8QTZ0kuVpAxPsfycQKPuD0sAxN2zkeFmWkds= X-Received: from pjbsb15.prod.google.com ([2002:a17:90b:50cf:b0:2ef:701e:21c1]) (user=seanjc job=prod-delivery.src-stubby-dispatcher) by 2002:a17:90b:3a08:b0:2ea:37b4:5373 with SMTP id 98e67ed59e1d1-2f83abe2135mr21011714a91.10.1738376259599; Fri, 31 Jan 2025 18:17:39 -0800 (PST) Reply-To: Sean Christopherson Date: Fri, 31 Jan 2025 18:17:09 -0800 In-Reply-To: <20250201021718.699411-1-seanjc@google.com> Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20250201021718.699411-1-seanjc@google.com> X-Mailer: git-send-email 2.48.1.362.g079036d154-goog Message-ID: <20250201021718.699411-8-seanjc@google.com> Subject: [PATCH 07/16] x86/acrn: Mark TSC frequency as known when using ACRN for calibration From: Sean Christopherson To: Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , x86@kernel.org, "Kirill A. Shutemov" , Juergen Gross , "K. Y. Srinivasan" , Haiyang Zhang , Wei Liu , Dexuan Cui , Ajay Kaher , Alexey Makhalov , Jan Kiszka , Paolo Bonzini , Andy Lutomirski , Peter Zijlstra Cc: linux-kernel@vger.kernel.org, linux-coco@lists.linux.dev, virtualization@lists.linux.dev, linux-hyperv@vger.kernel.org, jailhouse-dev@googlegroups.com, kvm@vger.kernel.org, xen-devel@lists.xenproject.org, Sean Christopherson , Nikunj A Dadhania , Tom Lendacky 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); }