From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pl1-f202.google.com (mail-pl1-f202.google.com [209.85.214.202]) (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 63EB63F4DD6 for ; Fri, 29 May 2026 14:45:03 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.214.202 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780065905; cv=none; b=Iq5Sqr31/EGJf23FzmG62w/M4mJf2CQr5fY8MlMAas9Ifu80/irPcQSGyt8QtxZwa7Sa+mKqOE1uraXfuwdTmGwPVN44wl1pLOQ/1n12+m6aCwYNmuQvvR241V6SXNZ5CPlP6reSLJxaKrWMwoxl2r5hDic4MPhYSlqp04XU40Y= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780065905; c=relaxed/simple; bh=eotALkKBLw2yWarXNKTm3nPmBYb4JWK2U7pCUvm8B4E=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=rW+aX4Vr3Lfr9qohAS9fn3308S1RLtpGJ1WrLQDQhaqF/TaVR0IGcpzOxzGU/rar5WJ4NklarCwsgjuNZPMvu0K4VFOOJQuin4UfY/9tWn3bQbkBFX2Rd7T0ReYHghi5j5CZ7zcpgo5iQUuus7CPe9rNF3WT0W93Blwn3LKzfGc= 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=ulZO98jJ; arc=none smtp.client-ip=209.85.214.202 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="ulZO98jJ" Received: by mail-pl1-f202.google.com with SMTP id d9443c01a7336-2bd5b20aaa6so149189755ad.2 for ; Fri, 29 May 2026 07:45:03 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20251104; t=1780065903; x=1780670703; 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=Cv3iY8yWhIG9MApRDLOLL6ifa8DISlk6XR/KWuM4GwE=; b=ulZO98jJNA4WGKgsglNoYNkks+bk5eZ3zhH2pRMiGgpgJWt+y2C9fKDyUO14Z/RFue Ny+8TGQxNPaYgNy7yfnBAENmrppqO2bYc8p6VfcD24icpDPPbBkfDHNLHBKTYD+PoUxq XeiTZV0WfU7zv24z3LjhS335g3DrjPrTUqW8/qYml1gmJDchK5lh7CyWAVCspMRVj8ag xqQj4ddbuL7m6IFmhdvxdedjMXjFuV0PHlcDD0GOWXHk5qNKMIXrYeKUKcI/u9CnJ2VO SsvpNjg9ZWncsTvdb0DaY24gnlhcZtSiHSeLTOeE/dOU6ODrn1Irmx5quccl81O7YOUb hxGA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1780065903; x=1780670703; 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=ZDIm3ItAMVTDdbeDXQiuI/W+7nt7459QSXC7iiAvAEbLSQ3XT+Y4/Q7mi7BM6m2LPB SgCeuyegfGIxQQfR1ZPoPArz0PiwQTjc++EX//oZmU+3KVOY1vDVULgEkWyDLnKQ/BsZ ziX1qIfkTUXy77+YIPZ3YxVDdK2CdlMTyFO7bQZkh2JiMXndb7FTxqX0tO2ky4O5j98J bhr5bAja0WWJMSeYDA4OnJ/eO0ISnoFWHmMfMwEoZOci8zLhRWynnyeRcTf2I/CnHoou za77rwZWM0xtxisxMUHRk4z3poUi0eDDMBV7ZimPs+b+3/ykaLHPlvA+E8qNl1trqDuy DPpA== X-Forwarded-Encrypted: i=1; AFNElJ+FkI9weqKz+6aSJXdXqtmUFDTd+mhCBD/3gjXSOd/sGtmaJREVDrvoTHKOzADeM1sb6FCALLHJQNcR@lists.linux.dev X-Gm-Message-State: AOJu0YzQ+upU9I+VhMMxMFZSTvozuZ+sUv6KbcoDGwJG3bB+kmvUicph 945Xqqnzm4XTTGgnu+RBZLF3nO9km28hnnfIxsOFKhqrv6K9e6AaK4VobA0R/yn6ygZP4nkW7aI REA/AXQ== 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-coco@lists.linux.dev 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