From nobody Sun Feb 8 17:42:51 2026 Received: from mail-oo1-f51.google.com (mail-oo1-f51.google.com [209.85.161.51]) (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 259C2238D38 for ; Wed, 26 Feb 2025 18:06:10 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.161.51 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1740593172; cv=none; b=HHMw09vqMqA1T/3Q3NslB+lI2M+eS+0rPsWcIAiBVETCLsUlWYWcs/yYJ9zd6GmaAtFZXSm90ezK+y9IqDeeE5LlOSo3zPDQvMl+kPpwSV5Xbvwa2EtAcvLDTGpP41KL8t8LVG52GbGfuwQH/e/1pFMuZArChWQbNNqmchjJUO0= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1740593172; c=relaxed/simple; bh=+NITKJToEUXuaXK8zS47p3zttszR09n9fFSVaLvRHdk=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=u9UYnRBPjSMmbcUoqpi8xYM0IlPoxVmt9VaV9a2AaRrOCe0S3wLSEOzJEMxGMtjELMDyguysQ3VX/qx6zNfAuo1sdkDci6PLUoT9Wd8v1gmy9yIR/PNr0+QXDsSPzEi/D2RZr8ISIQKTcrZ8Rd3LrZ0tmXOf0m/ymYJ67vdXtXU= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=Yn9mxMVo; arc=none smtp.client-ip=209.85.161.51 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="Yn9mxMVo" Received: by mail-oo1-f51.google.com with SMTP id 006d021491bc7-5fe944a4243so17833eaf.0 for ; Wed, 26 Feb 2025 10:06:10 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1740593170; x=1741197970; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=AzASOhbn/TdUnUq2BoNH4zzSfvXYoXG0ehJxyB+XGAg=; b=Yn9mxMVoVEencS7lXzRJU1YL+j7md8nXLHoMXxlzKghYcO1Taf6Zg9S8ujTo7a6aJj yEsFeBhR6HbfiOT6kvUtnpgCRSPR6LdC1On6m9+ulWoeAqtPChdF7Sfa9LdB+sWE9665 MYx7/pa4sPQu+98BD7qfnfZOiQ/Gu68g96I8lyYzScqN/1HXEmXz855Nqr+uVEeWpyNN VjVUUlmlMFfZI4XX3WzG8optFFLm4y+UsPFz1luD0iL58wgz9UhZy71JSDaCEx50yBP7 RC/o5bYOiKtIKT1nEDLvXHXOD1S/1Uro/cxDrcdhOjky+Cjt7F3N3Dpnc7t/5KsOmhP0 q1RQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1740593170; x=1741197970; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=AzASOhbn/TdUnUq2BoNH4zzSfvXYoXG0ehJxyB+XGAg=; b=QL41eUK493Rm6ZquMEprrDSI0G46kVigdGLpPNFgPO8ANGHlZL/XI0hulQSCxr0KJ3 ujJG4/E9oanLcfCuIpykOjkGkyZ/7JQGdM65f6HRxyQJDHZZundbHlD61tC35ttU95uA bRiHA8RYrsQpjiclPxJmTMRtiIR55haZd0/MtBmW1YiOmZOEMgKdE7m3hDH0ezBrNpLa 7E721KvdHdtlzjeig7eq+GdLPBE2BtNu9CtnjS5514jRfIohgt2kNOWPmNH/doZo4pU6 OAM+1eyzyscG6wXUFhb0XRidGOs3M964dWbx9BP3K4ZbP1Fvxxl/z/HA/r74DQUq4qRP arsA== X-Gm-Message-State: AOJu0YxoS2AUZHbPcS5HrdgYwQ4KvIcD4kanNR2vXPQJzmMYa0wcT7rV a5YZmsQFOX5AIYhs3YSeNpNf3o7ftcUnAHgCGrKS8sVttGSq5Zm6pGZL X-Gm-Gg: ASbGnctmSAhsIlcE6t92uygGkICKUSubWKCWwRtQbAtY+r3dBTiOCWyfEh4g46h+SxW TccbA5gbkP+RcRmebLtOe30i5dd6vJwTiR5uitxOoDJuW4zI7t36P7OImw92ERCQNtuVaNnu2TH 13wVpKlcs6Tb38wqND0RNMlxr/9PuBZDNNlF7V9G12jGLxGCERO6+tqmK3xLTe3hOL7bkbgly4B LNzKgUJbbQ4+36oXN3jOp2rFjR5XWirldiFszMoeEfC4x7Bek6K3l9fubw1aOpDNN4/pAu0yavp Ht0vI9Q= X-Google-Smtp-Source: AGHT+IFii8Y/uCMqIDFr/IoOM4XP5abwoUhsViZfg/Vzn8cm5Kj85HSMWVmn3VxiKZKd22QeLpQM+A== X-Received: by 2002:a05:6820:506:b0:5fd:b85:9b47 with SMTP id 006d021491bc7-5fe937185camr3833158eaf.1.1740593169862; Wed, 26 Feb 2025 10:06:09 -0800 (PST) Received: from citadel.lan ([2600:6c4a:4d3f:6d5c::1019]) by smtp.gmail.com with ESMTPSA id 006d021491bc7-5fe9428c8b3sm755069eaf.39.2025.02.26.10.06.07 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 26 Feb 2025 10:06:09 -0800 (PST) From: Brian Gerst To: linux-kernel@vger.kernel.org, x86@kernel.org Cc: Ingo Molnar , "H . Peter Anvin" , Thomas Gleixner , Borislav Petkov , Ard Biesheuvel , Uros Bizjak , Linus Torvalds , Andy Lutomirski , Peter Zijlstra , Andrew Morton , Brian Gerst Subject: [PATCH v2 10/11] x86/stackprotector: Move __stack_chk_guard to percpu hot section Date: Wed, 26 Feb 2025 13:05:29 -0500 Message-ID: <20250226180531.1242429-11-brgerst@gmail.com> X-Mailer: git-send-email 2.48.1 In-Reply-To: <20250226180531.1242429-1-brgerst@gmail.com> References: <20250226180531.1242429-1-brgerst@gmail.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" No functional change. Signed-off-by: Brian Gerst --- arch/x86/include/asm/stackprotector.h | 2 +- arch/x86/kernel/cpu/common.c | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/x86/include/asm/stackprotector.h b/arch/x86/include/asm/s= tackprotector.h index d43fb589fcf6..cd761b14eb02 100644 --- a/arch/x86/include/asm/stackprotector.h +++ b/arch/x86/include/asm/stackprotector.h @@ -20,7 +20,7 @@ =20 #include =20 -DECLARE_PER_CPU(unsigned long, __stack_chk_guard); +DECLARE_PER_CPU_CACHE_HOT(unsigned long, __stack_chk_guard); =20 /* * Initialize the stackprotector canary value. diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c index ac8721a0eb3a..62472b8f798a 100644 --- a/arch/x86/kernel/cpu/common.c +++ b/arch/x86/kernel/cpu/common.c @@ -2097,7 +2097,7 @@ void syscall_init(void) #endif /* CONFIG_X86_64 */ =20 #ifdef CONFIG_STACKPROTECTOR -DEFINE_PER_CPU(unsigned long, __stack_chk_guard); +DEFINE_PER_CPU_CACHE_HOT(unsigned long, __stack_chk_guard); #ifndef CONFIG_SMP EXPORT_PER_CPU_SYMBOL(__stack_chk_guard); #endif --=20 2.48.1