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 5E2893EDAA7 for ; Fri, 29 May 2026 14:44:55 +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=1780065896; cv=none; b=RS1EF3XZRgOn1qpJf69Z1Tpc+4Ailsw9nUox2vJWEdTs1bGfWwYcujF1LSPKYppCTb2b+zGm9jiY7wJ2WNGooRvVTgMyzYqPumR5MGS7hCWLQaZza7+p2tFlj3khhe2qqmrCi+tfH+bHhBidhaNInyECxxQHfo/ESGAXm38a1n4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1780065896; c=relaxed/simple; bh=pj/SB186PtPxR/4ct+s4/b3QnbdSVX96HwJWxY+zG4Y=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=uHtT4NVY9xRzNqC4p/bKzszufpRbMJzW8o3so3LuWZBKXVqJkM+9JXX0+p9NbgfDBmTV4o95WJDwD+Ozzecm8JUWRK2H0sCuZ0q++0VmGs9EjmmalEFpnZuXm3OtP2U1WQ1qNVlmdbdjEHWmT89kuhQY4CqZqsxkkqiqfNItyZA= 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=GbJC3YHC; 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="GbJC3YHC" Received: by mail-pj1-f73.google.com with SMTP id 98e67ed59e1d1-36781927b4dso8539626a91.0 for ; Fri, 29 May 2026 07:44:55 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20251104; t=1780065895; x=1780670695; 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=BmTkJVHUffmv2iD67o3GahQBnXBWwXEIKjsjKzRmdQg=; b=GbJC3YHCxQkZjN9xyQlso8YaCDo9BhpwPXFw6NENkyCX0XHnH6/ywXajeK++B/MeC7 KSaK/5tf8rZ3VY1QR5jloNyXaGR0vVFYm4FN4Wxghfla/3Jtu7O3K4k3Wo8PMPG5DKWU TwFwzTFDoT+QbNRO9yn2RLU8bjbuN/yhtpKtHeOp9Dv0JtiiITRkALrCNy+IXVISvGxA TVOVM7fCSys01kKQHlj2biQh102aMRZIP2uv/w7x61ZwZiQmPaXdjc/VZDijDgAAf+D7 Oh2igxdlWUC5Tr3pv2sk6gIeTdmU++jwwcncXb2eLndNFtTY1spsmfxvGvWZFujyH6Mq TNmA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1780065895; x=1780670695; 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=BmTkJVHUffmv2iD67o3GahQBnXBWwXEIKjsjKzRmdQg=; b=WZ59p45PdYIAO4Gn4pcmJos2p/r3f9pGOL90rsQYY1lN00MLhLcZ4+y6HRo+Xi03jX neTG7+ZQ3YH6Zt2qFDJFKhOtl4+8De23eyd9rnyZSTbL1s2+r/4ycg+4nxQP/5P3s5UN fIPR5op7Nq/20yMv8CnUHTo0cgPY7laHkot7/T4PgiNxwZfU0KjH9YMQZGnNWvM7IDp0 aT/tnymRgOoEfNdiRA7zuT9gidpA2cIHFPZZu1kY3UoQvhD/Q1Yuk1U8i2H+xLNh+sNg wrNri0s80TFEIPmezMbIK5ti5McCoL8pgg9csUZbmzU1I52tPyRdTyJhWzxxRtFLjQXD aYDw== X-Forwarded-Encrypted: i=1; AFNElJ9StUe42y+txcgX5s+mHWJGIuUOYPzZJVo0b6quTjHsV3QlbqU2Tu1EKRMDiD2EWD8+I8QKjMEIdGi8mII=@vger.kernel.org X-Gm-Message-State: AOJu0YwtOoctJwBjhxYlG5KiTCNQsDpy/BrMRSD3w994bVXOReVXLj3L LNObnyflp66fE/1vPmh322DOC4qT3JqDsAPi0pXlO8uU8x1yGBWL7vesBjktazpUPIRLB13cGPO 9qTRX0Q== X-Received: from pjbfv16.prod.google.com ([2002:a17:90b:e90:b0:36b:7407:9b72]) (user=seanjc job=prod-delivery.src-stubby-dispatcher) by 2002:a17:90b:2fcf:b0:36b:9c4a:e05d with SMTP id 98e67ed59e1d1-36bbcfe11camr4074961a91.17.1780065894470; Fri, 29 May 2026 07:44:54 -0700 (PDT) Reply-To: Sean Christopherson Date: Fri, 29 May 2026 07:43:50 -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: <20260529144435.704127-4-seanjc@google.com> Subject: [PATCH v4 03/47] x86/sev: Mark TSC as reliable when configuring Secure TSC 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" Move the code to mark the TSC as reliable from sme_early_init() to snp_secure_tsc_init(). The only reader of TSC_RELIABLE is the aptly named check_system_tsc_reliable(), which runs in tsc_init(), i.e. after snp_secure_tsc_init(). This will allow consolidating the handling of TSC_KNOWN_FREQ and TSC_RELIABLE when overriding the TSC calibration routine. Cc: Tom Lendacky Reviewed-by: Nikunj A Dadhania Reviewed-by: David Woodhouse Signed-off-by: Sean Christopherson --- arch/x86/coco/sev/core.c | 2 ++ arch/x86/mm/mem_encrypt_amd.c | 3 --- 2 files changed, 2 insertions(+), 3 deletions(-) diff --git a/arch/x86/coco/sev/core.c b/arch/x86/coco/sev/core.c index ecd77d3217f3..ed0ac52a765e 100644 --- a/arch/x86/coco/sev/core.c +++ b/arch/x86/coco/sev/core.c @@ -2037,6 +2037,8 @@ void __init snp_secure_tsc_init(void) secrets = (__force struct snp_secrets_page *)mem; setup_force_cpu_cap(X86_FEATURE_TSC_KNOWN_FREQ); + setup_force_cpu_cap(X86_FEATURE_TSC_RELIABLE); + rdmsrq(MSR_AMD64_GUEST_TSC_FREQ, tsc_freq_mhz); /* Extract the GUEST TSC MHZ from BIT[17:0], rest is reserved space */ diff --git a/arch/x86/mm/mem_encrypt_amd.c b/arch/x86/mm/mem_encrypt_amd.c index 2f8c32173972..6c3af974c7c2 100644 --- a/arch/x86/mm/mem_encrypt_amd.c +++ b/arch/x86/mm/mem_encrypt_amd.c @@ -535,9 +535,6 @@ void __init sme_early_init(void) */ x86_init.resources.dmi_setup = snp_dmi_setup; } - - if (sev_status & MSR_AMD64_SNP_SECURE_TSC) - setup_force_cpu_cap(X86_FEATURE_TSC_RELIABLE); } void __init mem_encrypt_free_decrypted_mem(void) -- 2.54.0.823.g6e5bcc1fc9-goog