From mboxrd@z Thu Jan 1 00:00:00 1970 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 kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5DBE2C433EF for ; Fri, 11 Mar 2022 12:37:20 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id A15DA8D0002; Fri, 11 Mar 2022 07:37:19 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 99E088D0001; Fri, 11 Mar 2022 07:37:19 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 866338D0002; Fri, 11 Mar 2022 07:37:19 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0145.hostedemail.com [216.40.44.145]) by kanga.kvack.org (Postfix) with ESMTP id 778008D0001 for ; Fri, 11 Mar 2022 07:37:19 -0500 (EST) Received: from smtpin31.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay01.hostedemail.com (Postfix) with ESMTP id 387F7181CAC40 for ; Fri, 11 Mar 2022 12:37:19 +0000 (UTC) X-FDA: 79232055798.31.391D714 Received: from mail.skyhub.de (mail.skyhub.de [5.9.137.197]) by imf29.hostedemail.com (Postfix) with ESMTP id E25D6120015 for ; Fri, 11 Mar 2022 12:37:17 +0000 (UTC) Received: from [127.0.0.1] (dynamic-002-247-254-048.2.247.pool.telefonica.de [2.247.254.48]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.skyhub.de (SuperMail on ZX Spectrum 128k) with ESMTPSA id DD1E01EC0347; Fri, 11 Mar 2022 13:37:11 +0100 (CET) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=alien8.de; s=dkim; t=1647002232; h=from:from: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=oq41xZrY/MyPw65YYgn+VmNTNE6/MaYtYT7L5NwXPC8=; b=aaEuLCJssRrOmm/JVzhDI67RrOIyRD9eNm7S1uFN7QDKvwwaVPCPSClUTESVg0Xf5/4iUt sjRTYA3LM0zZKnKneInasbNbp0QX66NNmgGB6Jaiv+sihPUDC/mIYMmi4aOQknZYgZsxcs NR1ZJJc4I9SyDuzO23371VueYk1qgd4= Date: Fri, 11 Mar 2022 12:37:09 +0000 From: Boris Petkov To: Bharata B Rao , linux-kernel@vger.kernel.org CC: linux-mm@kvack.org, x86@kernel.org, shuah@kernel.org, kirill.shutemov@linux.intel.com, tglx@linutronix.de, dave.hansen@linux.intel.com, will@kernel.org, mingo@redhat.com, oleg@redhat.com, catalin.marinas@arm.com, ananth.narayan@amd.com Subject: Re: [RFC PATCH v0 3/6] x86: Enable Upper Address Ignore(UAI) feature User-Agent: K-9 Mail for Android In-Reply-To: <20220310111545.10852-4-bharata@amd.com> References: <20220310111545.10852-1-bharata@amd.com> <20220310111545.10852-4-bharata@amd.com> Message-ID: <808EE3DA-69B1-47E3-825E-6DDCE1331F65@alien8.de> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable X-Rspamd-Server: rspam02 X-Rspamd-Queue-Id: E25D6120015 X-Rspam-User: Authentication-Results: imf29.hostedemail.com; dkim=pass header.d=alien8.de header.s=dkim header.b=aaEuLCJs; spf=pass (imf29.hostedemail.com: domain of bp@alien8.de designates 5.9.137.197 as permitted sender) smtp.mailfrom=bp@alien8.de; dmarc=pass (policy=none) header.from=alien8.de X-Stat-Signature: r59qz3hiwyha4ibwo3fziuecmhfcyekx X-HE-Tag: 1647002237-300808 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: >diff --git a/arch/x86/kernel/setup=2Ec b/arch/x86/kernel/setup=2Ec >index f7a132eb794d=2E=2E12615b1b4af5 100644 >--- a/arch/x86/kernel/setup=2Ec >+++ b/arch/x86/kernel/setup=2Ec >@@ -740,6 +740,12 @@ dump_kernel_offset(struct notifier_block *self, unsi= gned long v, void *p) > return 0; > } >=20 >+static inline void __init uai_enable(void) >+{ >+ if (boot_cpu_has(X86_FEATURE_UAI)) cpu_feature_enabled >+ msr_set_bit(MSR_EFER, _EFER_UAI); >+} --=20 Sent from a small device: formatting sux and brevity is inevitable=2E