From nobody Fri Jan 2 22:24:54 2026 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 225B1E95A62 for ; Sat, 7 Oct 2023 17:11:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1344128AbjJGRLF (ORCPT ); Sat, 7 Oct 2023 13:11:05 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37140 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1344046AbjJGRLB (ORCPT ); Sat, 7 Oct 2023 13:11:01 -0400 Received: from galois.linutronix.de (Galois.linutronix.de [193.142.43.55]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 242E99E; Sat, 7 Oct 2023 10:11:00 -0700 (PDT) Date: Sat, 07 Oct 2023 17:10:58 -0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1696698658; h=from:from:sender:sender:reply-to:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=gECZZh5iJ02TdAKQPSzRNmE/zibkCxme3Qc20tTwTPs=; b=3JyEcrtLPT7xPj2ehM0/gYaq8DDMbwUTGsFtAoLPHnplatdJPypYNGE/PZSsIQM5n2yzmA A4zr8vkDXym+qMbNNPcUM9C7sqxOMy4t87gUQvEe/iMC2bY/mBLJ2F/MgKtr3gtJT+Ts/U qyb5wVMKghsbvXKc/0+sKvakF/UvHYouRpAoBk5+5DrOXq8zB/lHK8I9EEqwZYZSrGsJVW 41HssW1+9qLLatpwgI+JZ6d4CDEuLMqfFqrWHUJS5yICls9XtcJbtjC1etRWnPGKpJhq7U phZA4q8GVniXnpWS+O9PB663AzhUm+h4vGVmm1wZgMmOKlZsNwlXmPAXZGxupw== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1696698658; h=from:from:sender:sender:reply-to:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=gECZZh5iJ02TdAKQPSzRNmE/zibkCxme3Qc20tTwTPs=; b=cdgrfJrN2bwdLeAJvwQfdGY97CXJwqbWT4dDnZl3hWsFHANCrolMMMDGN3rY/N98zoTcH4 Z5inQJSbtdCVtDAw== From: "tip-bot2 for Waiman Long" Sender: tip-bot2@linutronix.de Reply-to: linux-kernel@vger.kernel.org To: linux-tip-commits@vger.kernel.org Subject: [tip: sched/core] intel_idle: Use __update_spec_ctrl() in intel_idle_ibrs() Cc: Waiman Long , Ingo Molnar , "Rafael J. Wysocki" , Linus Torvalds , x86@kernel.org, linux-kernel@vger.kernel.org In-Reply-To: <20230727184600.26768-4-longman@redhat.com> References: <20230727184600.26768-4-longman@redhat.com> MIME-Version: 1.0 Message-ID: <169669865810.3135.4637182434325944599.tip-bot2@tip-bot2> Robot-ID: Robot-Unsubscribe: Contact to get blacklisted from these emails Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The following commit has been merged into the sched/core branch of tip: Commit-ID: 7506203089dceb1d9e1f35d37ad2e46d44798a6d Gitweb: https://git.kernel.org/tip/7506203089dceb1d9e1f35d37ad2e46d4= 4798a6d Author: Waiman Long AuthorDate: Thu, 27 Jul 2023 14:45:59 -04:00 Committer: Ingo Molnar CommitterDate: Sat, 07 Oct 2023 11:33:28 +02:00 intel_idle: Use __update_spec_ctrl() in intel_idle_ibrs() When intel_idle_ibrs() is called, it modifies the SPEC_CTRL MSR to 0 in order disable IBRS. However, the new MSR value isn't reflected in x86_spec_ctrl_current which is at odd with the other code that keep track of its state in that percpu variable. Use the new __update_spec_ctrl() to have the x86_spec_ctrl_current percpu value properly updated. Since spec-ctrl.h includes both msr.h and nospec-branch.h, we can remove those from the include file list. Signed-off-by: Waiman Long Signed-off-by: Ingo Molnar Acked-by: Rafael J. Wysocki Cc: Linus Torvalds Link: https://lore.kernel.org/r/20230727184600.26768-4-longman@redhat.com --- drivers/idle/intel_idle.c | 7 +++---- 1 file changed, 3 insertions(+), 4 deletions(-) diff --git a/drivers/idle/intel_idle.c b/drivers/idle/intel_idle.c index ea5a6a1..86ac9a4 100644 --- a/drivers/idle/intel_idle.c +++ b/drivers/idle/intel_idle.c @@ -53,9 +53,8 @@ #include #include #include -#include #include -#include +#include #include =20 #define INTEL_IDLE_VERSION "0.5.1" @@ -182,12 +181,12 @@ static __cpuidle int intel_idle_ibrs(struct cpuidle_d= evice *dev, int ret; =20 if (smt_active) - native_wrmsrl(MSR_IA32_SPEC_CTRL, 0); + __update_spec_ctrl(0); =20 ret =3D __intel_idle(dev, drv, index); =20 if (smt_active) - native_wrmsrl(MSR_IA32_SPEC_CTRL, spec_ctrl); + __update_spec_ctrl(spec_ctrl); =20 return ret; }