From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from shelob.surriel.com (shelob.surriel.com [96.67.55.147]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 82D3726AE4 for ; Wed, 21 May 2025 13:58:18 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=96.67.55.147 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1747835909; cv=none; b=W6AIVmr09TrshStiBqFIUGpQwmW0sO5V9+5MP6NvEriOVunEpFGkKxxg3xFrRMirkV70/q6XKdFJEiup6yHQj6zDEqFhcLNOQSQlm43aBiLtxbVXmdfNIQvLGctEqIpuS2KT8toyhL6uyR1N5sUl+9Vl9ZZLfEllbjhEfx6lLE4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1747835909; c=relaxed/simple; bh=uW9wgugdRaKgW7y55mEAnWqEGwNvDrKOKUgyTrcxlN0=; h=Message-ID:Subject:From:To:Cc:Date:In-Reply-To:References: Content-Type:MIME-Version; b=LzL18IOCoYXK8jqaQbwrytwYaZZWBpUzxnBe4cWTyDPTeo0nVc9pa2HE2gvvP1iXPitIC+r7SiW6e9e7BbSeE93+4BujmoKQspVmR/WcMQXMKacdtL+ObmdklStSg8drjKOaDhZQvZ5S9zljNjf2eDPW/CPgMbCPZFvmNOT1GQQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=surriel.com; spf=pass smtp.mailfrom=shelob.surriel.com; arc=none smtp.client-ip=96.67.55.147 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=surriel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=shelob.surriel.com Received: from fangorn.home.surriel.com ([10.0.13.7]) by shelob.surriel.com with esmtpsa (TLS1.2) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.97.1) (envelope-from ) id 1uHjxA-000000005r3-0HFy; Wed, 21 May 2025 09:57:52 -0400 Message-ID: Subject: Re: [RFC v2 4/9] x86/mm: Introduce X86_FEATURE_RAR From: Rik van Riel To: Borislav Petkov Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, x86@kernel.org, kernel-team@meta.com, dave.hansen@linux.intel.com, luto@kernel.org, peterz@infradead.org, tglx@linutronix.de, mingo@redhat.com, hpa@zytor.com, nadav.amit@gmail.com, Rik van Riel , Yu-cheng Yu Date: Wed, 21 May 2025 09:57:52 -0400 In-Reply-To: <20250521115343.GCaC2-x8LsmMApUkjQ@fat_crate.local> References: <20250520010350.1740223-1-riel@surriel.com> <20250520010350.1740223-5-riel@surriel.com> <20250521115343.GCaC2-x8LsmMApUkjQ@fat_crate.local> Autocrypt: addr=riel@surriel.com; prefer-encrypt=mutual; keydata=mQENBFIt3aUBCADCK0LicyCYyMa0E1lodCDUBf6G+6C5UXKG1jEYwQu49cc/gUBTTk33A eo2hjn4JinVaPF3zfZprnKMEGGv4dHvEOCPWiNhlz5RtqH3SKJllq2dpeMS9RqbMvDA36rlJIIo47 Z/nl6IA8MDhSqyqdnTY8z7LnQHqq16jAqwo7Ll9qALXz4yG1ZdSCmo80VPetBZZPw7WMjo+1hByv/ lvdFnLfiQ52tayuuC1r9x2qZ/SYWd2M4p/f5CLmvG9UcnkbYFsKWz8bwOBWKg1PQcaYHLx06sHGdY dIDaeVvkIfMFwAprSo5EFU+aes2VB2ZjugOTbkkW2aPSWTRsBhPHhV6dABEBAAG0HlJpayB2YW4gU mllbCA8cmllbEByZWRoYXQuY29tPokBHwQwAQIACQUCW5LcVgIdIAAKCRDOed6ShMTeg05SB/986o gEgdq4byrtaBQKFg5LWfd8e+h+QzLOg/T8mSS3dJzFXe5JBOfvYg7Bj47xXi9I5sM+I9Lu9+1XVb/ r2rGJrU1DwA09TnmyFtK76bgMF0sBEh1ECILYNQTEIemzNFwOWLZZlEhZFRJsZyX+mtEp/WQIygHV WjwuP69VJw+fPQvLOGn4j8W9QXuvhha7u1QJ7mYx4dLGHrZlHdwDsqpvWsW+3rsIqs1BBe5/Itz9o 6y9gLNtQzwmSDioV8KhF85VmYInslhv5tUtMEppfdTLyX4SUKh8ftNIVmH9mXyRCZclSoa6IMd635 Jq1Pj2/Lp64tOzSvN5Y9zaiCc5FucXtB9SaWsgdmFuIFJpZWwgPHJpZWxAc3VycmllbC5jb20+iQE +BBMBAgAoBQJSLd2lAhsjBQkSzAMABgsJCAcDAgYVCAIJCgsEFgIDAQIeAQIXgAAKCRDOed6ShMTe g4PpB/0ZivKYFt0LaB22ssWUrBoeNWCP1NY/lkq2QbPhR3agLB7ZXI97PF2z/5QD9Fuy/FD/jddPx KRTvFCtHcEzTOcFjBmf52uqgt3U40H9GM++0IM0yHusd9EzlaWsbp09vsAV2DwdqS69x9RPbvE/Ne fO5subhocH76okcF/aQiQ+oj2j6LJZGBJBVigOHg+4zyzdDgKM+jp0bvDI51KQ4XfxV593OhvkS3z 3FPx0CE7l62WhWrieHyBblqvkTYgJ6dq4bsYpqxxGJOkQ47WpEUx6onH+rImWmPJbSYGhwBzTo0Mm G1Nb1qGPG+mTrSmJjDRxrwf1zjmYqQreWVSFEt26tBpSaWsgdmFuIFJpZWwgPHJpZWxAZmIuY29tP okBPgQTAQIAKAUCW5LbiAIbIwUJEswDAAYLCQgHAwIGFQgCCQoLBBYCAwECHgECF4AACgkQznneko TE3oOUEQgAsrGxjTC1bGtZyuvyQPcXclap11Ogib6rQywGYu6/Mnkbd6hbyY3wpdyQii/cas2S44N cQj8HkGv91JLVE24/Wt0gITPCH3rLVJJDGQxprHTVDs1t1RAbsbp0XTksZPCNWDGYIBo2aHDwErhI omYQ0Xluo1WBtH/UmHgirHvclsou1Ks9jyTxiPyUKRfae7GNOFiX99+ZlB27P3t8CjtSO831Ij0Ip QrfooZ21YVlUKw0Wy6Ll8EyefyrEYSh8KTm8dQj4O7xxvdg865TLeLpho5PwDRF+/mR3qi8CdGbkE c4pYZQO8UDXUN4S+pe0aTeTqlYw8rRHWF9TnvtpcNzZw== Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable User-Agent: Evolution 3.54.3 (3.54.3-1.fc41) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Sender: riel@surriel.com On Wed, 2025-05-21 at 13:53 +0200, Borislav Petkov wrote: > On Mon, May 19, 2025 at 09:02:29PM -0400, Rik van Riel wrote: > > From: Rik van Riel > >=20 > > Introduce X86_FEATURE_RAR and enumeration of the feature. > >=20 > > [riel: moved initialization to intel.c and disabling to > > Kconfig.cpufeatures] > >=20 > > Signed-off-by: Yu-cheng Yu >=20 > I'm guessing Yu-cheng is the original author - that's expressed > differently. I will fix that up! >=20 > > @@ -1771,6 +1783,7 @@ static void __init early_identify_cpu(struct > > cpuinfo_x86 *c) > > =C2=A0 setup_clear_cpu_cap(X86_FEATURE_LA57); > > =C2=A0 > > =C2=A0 detect_nopl(); > > + detect_rar(c); > > =C2=A0} >=20 > Move all this gunk into early_init_intel(). >=20 I had the same thought, and tried that already. It didn't work. --=20 All Rights Reversed.