Message ID | 20230801083318.8363-15-xin3.li@intel.com (mailing list archive) |
---|---|
State | Superseded |
Headers | show
Return-Path: <xen-devel-bounces@lists.xenproject.org> X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.xenproject.org (lists.xenproject.org [192.237.175.120]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 00674C18E72 for <xen-devel@archiver.kernel.org>; Tue, 1 Aug 2023 09:02:25 +0000 (UTC) Received: from list by lists.xenproject.org with outflank-mailman.573855.898920 (Exim 4.92) (envelope-from <xen-devel-bounces@lists.xenproject.org>) id 1qQlGg-000063-Rx; Tue, 01 Aug 2023 09:02:14 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 573855.898920; Tue, 01 Aug 2023 09:02:14 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from <xen-devel-bounces@lists.xenproject.org>) id 1qQlGg-0008UB-8X; Tue, 01 Aug 2023 09:02:14 +0000 Received: by outflank-mailman (input) for mailman id 573855; Tue, 01 Aug 2023 09:02:09 +0000 Received: from se1-gles-flk1-in.inumbo.com ([94.247.172.50] helo=se1-gles-flk1.inumbo.com) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from <SRS0=L1iX=DS=intel.com=xin3.li@srs-se1.protection.inumbo.net>) id 1qQlGb-0005E5-AP for xen-devel@lists.xenproject.org; Tue, 01 Aug 2023 09:02:09 +0000 Received: from mgamail.intel.com (unknown [134.134.136.31]) by se1-gles-flk1.inumbo.com (Halon) with ESMTPS id 174592e4-304a-11ee-8613-37d641c3527e; Tue, 01 Aug 2023 11:02:07 +0200 (CEST) Received: from fmsmga006.fm.intel.com ([10.253.24.20]) by orsmga104.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 01 Aug 2023 02:02:04 -0700 Received: from unknown (HELO fred..) 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Peter Anvin" <hpa@zytor.com>, Andy Lutomirski <luto@kernel.org>, Oleg Nesterov <oleg@redhat.com>, Tony Luck <tony.luck@intel.com>, "K . Y . Srinivasan" <kys@microsoft.com>, Haiyang Zhang <haiyangz@microsoft.com>, Wei Liu <wei.liu@kernel.org>, Dexuan Cui <decui@microsoft.com>, Paolo Bonzini <pbonzini@redhat.com>, Wanpeng Li <wanpengli@tencent.com>, Vitaly Kuznetsov <vkuznets@redhat.com>, Sean Christopherson <seanjc@google.com>, Peter Zijlstra <peterz@infradead.org>, Juergen Gross <jgross@suse.com>, Stefano Stabellini <sstabellini@kernel.org>, Oleksandr Tyshchenko <oleksandr_tyshchenko@epam.com>, Josh Poimboeuf <jpoimboe@kernel.org>, "Paul E . McKenney" <paulmck@kernel.org>, Catalin Marinas <catalin.marinas@arm.com>, Randy Dunlap <rdunlap@infradead.org>, Steven Rostedt <rostedt@goodmis.org>, Kim Phillips <kim.phillips@amd.com>, Xin Li <xin3.li@intel.com>, Hyeonggon Yoo <42.hyeyoo@gmail.com>, "Liam R . Howlett" <Liam.Howlett@Oracle.com>, Sebastian Reichel <sebastian.reichel@collabora.com>, "Kirill A . Shutemov" <kirill.shutemov@linux.intel.com>, Suren Baghdasaryan <surenb@google.com>, Pawan Gupta <pawan.kumar.gupta@linux.intel.com>, Babu Moger <babu.moger@amd.com>, Jim Mattson <jmattson@google.com>, Sandipan Das <sandipan.das@amd.com>, Lai Jiangshan <jiangshanlai@gmail.com>, Hans de Goede <hdegoede@redhat.com>, Reinette Chatre <reinette.chatre@intel.com>, Daniel Sneddon <daniel.sneddon@linux.intel.com>, Breno Leitao <leitao@debian.org>, Nikunj A Dadhania <nikunj@amd.com>, Brian Gerst <brgerst@gmail.com>, Sami Tolvanen <samitolvanen@google.com>, Alexander Potapenko <glider@google.com>, Andrew Morton <akpm@linux-foundation.org>, Arnd Bergmann <arnd@arndb.de>, "Eric W . Biederman" <ebiederm@xmission.com>, Kees Cook <keescook@chromium.org>, Masami Hiramatsu <mhiramat@kernel.org>, Masahiro Yamada <masahiroy@kernel.org>, Ze Gao <zegao2021@gmail.com>, Fei Li <fei1.li@intel.com>, Conghui <conghui.chen@intel.com>, Ashok Raj <ashok.raj@intel.com>, "Jason A . Donenfeld" <Jason@zx2c4.com>, Mark Rutland <mark.rutland@arm.com>, Jacob Pan <jacob.jun.pan@linux.intel.com>, Jiapeng Chong <jiapeng.chong@linux.alibaba.com>, Jane Malalane <jane.malalane@citrix.com>, David Woodhouse <dwmw@amazon.co.uk>, Boris Ostrovsky <boris.ostrovsky@oracle.com>, Arnaldo Carvalho de Melo <acme@redhat.com>, Yantengsi <siyanteng@loongson.cn>, Christophe Leroy <christophe.leroy@csgroup.eu>, Sathvika Vasireddy <sv@linux.ibm.com> Subject: [PATCH RESEND v9 14/36] x86/fred: Disallow the swapgs instruction when FRED is enabled Date: Tue, 1 Aug 2023 01:32:56 -0700 Message-Id: <20230801083318.8363-15-xin3.li@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230801083318.8363-1-xin3.li@intel.com> References: <20230801083318.8363-1-xin3.li@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit |
Series |
x86: enable FRED for x86-64
|
expand
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diff --git a/arch/x86/kernel/process_64.c b/arch/x86/kernel/process_64.c index 265ab8fcb146..6d5fed29f552 100644 --- a/arch/x86/kernel/process_64.c +++ b/arch/x86/kernel/process_64.c @@ -166,7 +166,8 @@ static noinstr unsigned long __rdgsbase_inactive(void) lockdep_assert_irqs_disabled(); - if (!cpu_feature_enabled(X86_FEATURE_XENPV)) { + if (!cpu_feature_enabled(X86_FEATURE_FRED) && + !cpu_feature_enabled(X86_FEATURE_XENPV)) { native_swapgs(); gsbase = rdgsbase(); native_swapgs(); @@ -191,7 +192,8 @@ static noinstr void __wrgsbase_inactive(unsigned long gsbase) { lockdep_assert_irqs_disabled(); - if (!cpu_feature_enabled(X86_FEATURE_XENPV)) { + if (!cpu_feature_enabled(X86_FEATURE_FRED) && + !cpu_feature_enabled(X86_FEATURE_XENPV)) { native_swapgs(); wrgsbase(gsbase); native_swapgs();