From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pl1-f201.google.com (mail-pl1-f201.google.com [209.85.214.201]) (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 F095A3F44FF for ; Fri, 29 May 2026 14:45:02 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.214.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780065904; cv=none; b=QwKPO1SlOnm+DPv97fiEe8tk//QYxXhRM84Ho5u/BVfaQCwPCCP9lqyhyPpTxPvDnzcd2UO9DcBkk5qllta8j82cQTC5c9/Ev+PskatMZWk6hkC0l4U9AEw+jk2qNCibaCFmezAAgHe9UXnIcdCQtnj2OOmjtrEwU2CROvujj+I= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780065904; c=relaxed/simple; bh=eotALkKBLw2yWarXNKTm3nPmBYb4JWK2U7pCUvm8B4E=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=iC6Bt6lXEjd9SY+/tXEzqE3DTS5dO9S9mbLK9c7HPOfuBISKM/OFsz7NC2K7oDrOkb0C19DOov8zc79U5drfsOGLE1K4gPVq1YrLOP/3rzXFryc5a1kvXzWJvK4bWSZrPrhAscfeVmnii9Z+v3b9R6rpzDPDMNHPttX2MGh+Wig= 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=N/6io0P4; arc=none smtp.client-ip=209.85.214.201 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="N/6io0P4" Received: by mail-pl1-f201.google.com with SMTP id d9443c01a7336-2beb9002a00so68689595ad.0 for ; Fri, 29 May 2026 07:45:02 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20251104; t=1780065902; x=1780670702; 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=Cv3iY8yWhIG9MApRDLOLL6ifa8DISlk6XR/KWuM4GwE=; b=N/6io0P4lTZ9+gBDKpYNm2I2TcplViuIkQuxEoprD3Qcuw5rROYd/iKXYGv1sD5pO+ /kApdM2CFOReZpXeFYCyCBe5/xnuwyXhqB1o//VjxRMGSQKA9Xs1E1k6WpZe1kHyEwSq C+SLomuD4R7oVd1Gef/hJ6d1iNbXSg1NmLfbj1/7kQqI1SDYepWJ57blrxAAEzvFO+To ek1TJB8Bvuut/W9fy9IlisNiq+fYENPA56pwFPKukT1QzY5v8AqOB8CFnimKWCKNrKz2 ajVk5REqt9G/rVIDCIIGvXvodriRo/siow94vFDfGwhL/BgNm0NgvXkbJpPv4uYRBFaQ H6hA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1780065902; x=1780670702; 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=Cv3iY8yWhIG9MApRDLOLL6ifa8DISlk6XR/KWuM4GwE=; b=cc3U8lHNnco+nn/hLPXWF71YtYHW9U4PiSknXcMT9hK+Sq/AuiqwVkprWH2WkajFY+ u3md1kVwHL3Tdj4TZhBF9IcGYZnSbDtenmwvlG9jIPlmZ+Mto/u0d7JCWwSwr7HB6P1x zPIrA6DbsMCEBxAV+/x4FshdoaiUdY3yzUxKshAlo8lwsKfVc6GtIVwzWdMwRr9lBYka y3JIVq5AG67pNh7iTzqIvA3RuYro54Yjgs5uEPvvdxD6wex9IY8YjIUWKV6mdhAtGg+g W8VQYe1YBeZXn+8o2idkXuKLy87ktol9ZFk4x7Yzig/6XRjiOK4CGEfFNN61d945jlEZ f08A== X-Forwarded-Encrypted: i=1; AFNElJ/f0c1P7UHBglyVflsh6EFFljJb2zc6yopPZzYQGa1XoKxTmhu15hsTrS/DUdZnj4c71Ld097HbcU1SARI=@vger.kernel.org X-Gm-Message-State: AOJu0YxB0iAEXIA60M61tQU99pRxN3FysnG2D2Hkk7GL9ZsSinYQvAut RscXPt8e1nsgbNnryZ4/PYefN+nY70gTvoV9sAQIEk89QoQ2yf/eClExBu8t2aRyqOT1F4+/WFq B6GLgng== X-Received: from plem4.prod.google.com ([2002:a17:902:e404:b0:2bc:f203:12a1]) (user=seanjc job=prod-delivery.src-stubby-dispatcher) by 2002:a17:903:1983:b0:2bf:23ad:8595 with SMTP id d9443c01a7336-2bf367b260amr1523355ad.4.1780065902031; Fri, 29 May 2026 07:45:02 -0700 (PDT) Reply-To: Sean Christopherson Date: Fri, 29 May 2026 07:43:56 -0700 In-Reply-To: <20260529144435.704127-1-seanjc@google.com> Precedence: bulk X-Mailing-List: linux-hyperv@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20260529144435.704127-1-seanjc@google.com> X-Mailer: git-send-email 2.54.0.823.g6e5bcc1fc9-goog Message-ID: <20260529144435.704127-10-seanjc@google.com> Subject: [PATCH v4 09/47] x86/acrn: Mark TSC frequency as known when using ACRN for calibration From: Sean Christopherson To: Paolo Bonzini , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , x86@kernel.org, Kiryl Shutsemau , 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: "H. Peter Anvin" , Rick Edgecombe , Vitaly Kuznetsov , Broadcom internal kernel review list , Boris Ostrovsky , Stephen Boyd , 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, David Woodhouse , Tom Lendacky , Nikunj A Dadhania , 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 | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/x86/kernel/cpu/acrn.c b/arch/x86/kernel/cpu/acrn.c index ad8f2da8003b..0303fe6a2efa 100644 --- a/arch/x86/kernel/cpu/acrn.c +++ b/arch/x86/kernel/cpu/acrn.c @@ -33,6 +33,8 @@ 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); } static bool acrn_x2apic_available(void) -- 2.54.0.823.g6e5bcc1fc9-goog