From patchwork Wed May 8 14:43:30 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Kirill A . Shutemov" X-Patchwork-Id: 10936031 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id EF740924 for ; Wed, 8 May 2019 14:52:00 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id E275528A27 for ; Wed, 8 May 2019 14:52:00 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id E02AD28A28; Wed, 8 May 2019 14:52:00 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 92E0F28A59 for ; Wed, 8 May 2019 14:52:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728358AbfEHOvd (ORCPT ); Wed, 8 May 2019 10:51:33 -0400 Received: from mga02.intel.com ([134.134.136.20]:19899 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728115AbfEHOom (ORCPT ); Wed, 8 May 2019 10:44:42 -0400 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga005.fm.intel.com ([10.253.24.32]) by orsmga101.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 08 May 2019 07:44:39 -0700 X-ExtLoop1: 1 Received: from black.fi.intel.com ([10.237.72.28]) by fmsmga005.fm.intel.com with ESMTP; 08 May 2019 07:44:35 -0700 Received: by black.fi.intel.com (Postfix, from userid 1000) id 243E9709; Wed, 8 May 2019 17:44:29 +0300 (EEST) From: "Kirill A. Shutemov" To: Andrew Morton , x86@kernel.org, Thomas Gleixner , Ingo Molnar , "H. Peter Anvin" , Borislav Petkov , Peter Zijlstra , Andy Lutomirski , David Howells Cc: Kees Cook , Dave Hansen , Kai Huang , Jacob Pan , Alison Schofield , linux-mm@kvack.org, kvm@vger.kernel.org, keyrings@vger.kernel.org, linux-kernel@vger.kernel.org, "Kirill A. Shutemov" Subject: [PATCH, RFC 10/62] x86/mm: Detect MKTME early Date: Wed, 8 May 2019 17:43:30 +0300 Message-Id: <20190508144422.13171-11-kirill.shutemov@linux.intel.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190508144422.13171-1-kirill.shutemov@linux.intel.com> References: <20190508144422.13171-1-kirill.shutemov@linux.intel.com> MIME-Version: 1.0 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP We need to know the number of KeyIDs before page_ext is initialized. We are going to use page_ext to store KeyID and it would be handly to avoid page_ext allocation if there's no MKMTE in the system. page_ext initialization happens before full CPU initizliation is complete. Move detect_tme() call to early_init_intel(). Signed-off-by: Kirill A. Shutemov --- arch/x86/kernel/cpu/intel.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/arch/x86/kernel/cpu/intel.c b/arch/x86/kernel/cpu/intel.c index e271264e238a..4c9fadb57a13 100644 --- a/arch/x86/kernel/cpu/intel.c +++ b/arch/x86/kernel/cpu/intel.c @@ -161,6 +161,8 @@ static bool bad_spectre_microcode(struct cpuinfo_x86 *c) return false; } +static void detect_tme(struct cpuinfo_x86 *c); + static void early_init_intel(struct cpuinfo_x86 *c) { u64 misc_enable; @@ -311,6 +313,9 @@ static void early_init_intel(struct cpuinfo_x86 *c) */ if (detect_extended_topology_early(c) < 0) detect_ht_early(c); + + if (cpu_has(c, X86_FEATURE_TME)) + detect_tme(c); } #ifdef CONFIG_X86_32 @@ -791,9 +796,6 @@ static void init_intel(struct cpuinfo_x86 *c) if (cpu_has(c, X86_FEATURE_VMX)) detect_vmx_virtcap(c); - if (cpu_has(c, X86_FEATURE_TME)) - detect_tme(c); - init_intel_energy_perf(c); init_intel_misc_features(c);