From nobody Thu Sep 18 03:00:44 2025 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id EF62EC00145 for ; Mon, 12 Dec 2022 18:37:39 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233590AbiLLShi (ORCPT ); Mon, 12 Dec 2022 13:37:38 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58366 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233562AbiLLSh0 (ORCPT ); Mon, 12 Dec 2022 13:37:26 -0500 Received: from mail-pj1-x104a.google.com (mail-pj1-x104a.google.com [IPv6:2607:f8b0:4864:20::104a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2A5D212AFD for ; Mon, 12 Dec 2022 10:37:25 -0800 (PST) Received: by mail-pj1-x104a.google.com with SMTP id q93-20020a17090a1b6600b0021311ab9082so364295pjq.7 for ; Mon, 12 Dec 2022 10:37:25 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20210112; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=+njGW4VjenMTQbJUIuskcZhM7dDdCQXICJE3uEmTc98=; b=ZQ9u9x0jc+g6g3SLO/fDBuNnJLbyN8v5Mp4f9IqdWtSZYz3Oe8f/FTKp97SJBnZITU dspnGUAZFMMqDM0mPUPfWxExkLUru43PkNik6taHARntQDAtf+hiNPKOYn1sojBxrvt8 laDXCBRbfO2vqge8JNDgZEJErg2ix1RCQUvmlVCbOZgnIH48kO6K8nBbqfp6c2H+0lB9 cN6+V4Edi+CZutedirUU7HemunrZWSy4D+4LBZTi4MpXq5CgEc1u4t/3qcI0hZplrkkl vdiLp1qBn2tPZNwOBySx9BH3Ye8jaQTBK7fxuaNhMT7nowS6MCCTRCwA922gFO84Q4Y7 bknQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=+njGW4VjenMTQbJUIuskcZhM7dDdCQXICJE3uEmTc98=; b=Gbuh40vS5YZ+W+PqVdF9CEjqZE6YVEtvalEw/RGXBaMrVbySAYbFtifx3NWIE9k9Bf H6l7ISUTBOZmsjK77q2LFhSFuW19yiC8i5+dIrPCiwPolxYCiEFRZAYyRggzTZaCmkko 1JauaDJcZcXg7IceiyUFDAcbXRwHKUEW/CAuKmHTssZq1bGrPLfJch9v/1wbOe3oDdVH 3WNuMjxpanjyBn3EN5fEs8Nm9AT6FuZOrWDA1OEruZ4IuSmr3TgCsefgPgztPdyly25k d44OG2NDNwV5chUTZy4m7PuDKItok2L+1TMbBAEyp3TjNF+ypXYCw0ha4Jcnx+lgIn0M 1znQ== X-Gm-Message-State: ANoB5pkN/WhmK4VVptP02lNJPwuDBPY8QQzCj42l5oiY4jDOV3aTPBZt Cw4CvsAdzwWOGwEPU1SrQWiCRN1oG2Pd X-Google-Smtp-Source: AA0mqf5KMkc5/651W+5Uzzagtvk/Z1Zi+Z5SO9fqVmCF1GEn68XFI1Bq4ItaaOGSW2cUNLhAMdZrF8Ndntt8 X-Received: from vipin.c.googlers.com ([fda3:e722:ac3:cc00:7f:e700:c0a8:479f]) (user=vipinsh job=sendgmr) by 2002:a17:90a:bd92:b0:219:861b:b108 with SMTP id z18-20020a17090abd9200b00219861bb108mr541pjr.121.1670870244693; Mon, 12 Dec 2022 10:37:24 -0800 (PST) Date: Mon, 12 Dec 2022 10:37:08 -0800 In-Reply-To: <20221212183720.4062037-1-vipinsh@google.com> Mime-Version: 1.0 References: <20221212183720.4062037-1-vipinsh@google.com> X-Mailer: git-send-email 2.39.0.rc1.256.g54fd8350bd-goog Message-ID: <20221212183720.4062037-2-vipinsh@google.com> Subject: [Patch v4 01/13] x86/hyperv: Add HV_EXPOSE_INVARIANT_TSC define From: Vipin Sharma To: seanjc@google.com, pbonzini@redhat.com, vkuznets@redhat.com, dmatlack@google.com Cc: kvm@vger.kernel.org, linux-kernel@vger.kernel.org, Michael Kelley Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Vitaly Kuznetsov Avoid open coding BIT(0) of HV_X64_MSR_TSC_INVARIANT_CONTROL by adding a dedicated define. While there's only one user at this moment, the upcoming KVM implementation of Hyper-V Invariant TSC feature will need to use it as well. Reviewed-by: Michael Kelley Reviewed-by: Sean Christopherson Signed-off-by: Vitaly Kuznetsov --- arch/x86/include/asm/hyperv-tlfs.h | 3 +++ arch/x86/kernel/cpu/mshyperv.c | 2 +- 2 files changed, 4 insertions(+), 1 deletion(-) diff --git a/arch/x86/include/asm/hyperv-tlfs.h b/arch/x86/include/asm/hype= rv-tlfs.h index e3efaf6e6b62..617332dd64ac 100644 --- a/arch/x86/include/asm/hyperv-tlfs.h +++ b/arch/x86/include/asm/hyperv-tlfs.h @@ -255,6 +255,9 @@ enum hv_isolation_type { /* TSC invariant control */ #define HV_X64_MSR_TSC_INVARIANT_CONTROL 0x40000118 =20 +/* HV_X64_MSR_TSC_INVARIANT_CONTROL bits */ +#define HV_EXPOSE_INVARIANT_TSC BIT_ULL(0) + /* Register name aliases for temporary compatibility */ #define HV_X64_MSR_STIMER0_COUNT HV_REGISTER_STIMER0_COUNT #define HV_X64_MSR_STIMER0_CONFIG HV_REGISTER_STIMER0_CONFIG diff --git a/arch/x86/kernel/cpu/mshyperv.c b/arch/x86/kernel/cpu/mshyperv.c index 831613959a92..e402923800d7 100644 --- a/arch/x86/kernel/cpu/mshyperv.c +++ b/arch/x86/kernel/cpu/mshyperv.c @@ -388,7 +388,7 @@ static void __init ms_hyperv_init_platform(void) * setting of this MSR bit should happen before init_intel() * is called. */ - wrmsrl(HV_X64_MSR_TSC_INVARIANT_CONTROL, 0x1); + wrmsrl(HV_X64_MSR_TSC_INVARIANT_CONTROL, HV_EXPOSE_INVARIANT_TSC); setup_force_cpu_cap(X86_FEATURE_TSC_RELIABLE); } =20 --=20 2.39.0.rc1.256.g54fd8350bd-goog