From patchwork Tue Aug 1 08:32:44 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Li, Xin3" X-Patchwork-Id: 13335932 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 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 48A34C001DF for ; Tue, 1 Aug 2023 09:02:14 +0000 (UTC) Received: from list by lists.xenproject.org with outflank-mailman.573843.898816 (Exim 4.92) (envelope-from ) id 1qQlGW-0005jk-2r; Tue, 01 Aug 2023 09:02:04 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 573843.898816; Tue, 01 Aug 2023 09:02:04 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1qQlGV-0005j5-UD; Tue, 01 Aug 2023 09:02:03 +0000 Received: by outflank-mailman (input) for mailman id 573843; Tue, 01 Aug 2023 09:02:02 +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 ) id 1qQlGU-0005E5-In for xen-devel@lists.xenproject.org; Tue, 01 Aug 2023 09:02:02 +0000 Received: from mgamail.intel.com (unknown [134.134.136.31]) by se1-gles-flk1.inumbo.com (Halon) with ESMTPS id 11a990c0-304a-11ee-8613-37d641c3527e; Tue, 01 Aug 2023 11:01:59 +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 02:01:53 -0700 Received: from unknown (HELO fred..) ([172.25.112.68]) by fmsmga006.fm.intel.com with ESMTP; 01 Aug 2023 02:01:52 -0700 X-BeenThere: xen-devel@lists.xenproject.org List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Precedence: list Sender: "Xen-devel" X-Inumbo-ID: 11a990c0-304a-11ee-8613-37d641c3527e DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1690880519; x=1722416519; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=7IEqijDovSKiraXkZB5AveXiayuWDixrga5p5CTJEmM=; b=HChlJijnmkyEoWl4NcgeZmCDexEeCGIj0Lbc7CJlMeJlnhEda+tLbOlm 4DFv5cU03XHoDPt+V2pcXQpsBDeu35hsurp9UgCNAzjygu+Sz3T1icCro 846oZlMVt7Rf7XZqTtcgIwUGR9MaUkwS5+G9m0tTSx4MehpnI2+czS1Uj Jeoilk1bF92jWyHOlFn4j3OkGsSsr20SnXZWcAeKAqI8h94JjuJsqS8S7 NowuDJdfilAgtmgpvrxxRsLjgdMMUC7KbC/eklDaWHGjd5onVnoOb4zv/ Ekc5dG8bcyJgITEn+njarQ7eMkbzuN5MRmwAiMNkb+nFXPYbt6dBhwUqG Q==; X-IronPort-AV: E=McAfee;i="6600,9927,10788"; a="433082101" X-IronPort-AV: E=Sophos;i="6.01,246,1684825200"; d="scan'208";a="433082101" X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10788"; a="975216951" X-IronPort-AV: E=Sophos;i="6.01,246,1684825200"; d="scan'208";a="975216951" From: Xin Li To: linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-edac@vger.kernel.org, linux-hyperv@vger.kernel.org, kvm@vger.kernel.org, xen-devel@lists.xenproject.org Cc: Jonathan Corbet , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , x86@kernel.org, "H . Peter Anvin" , Andy Lutomirski , Oleg Nesterov , Tony Luck , "K . Y . Srinivasan" , Haiyang Zhang , Wei Liu , Dexuan Cui , Paolo Bonzini , Wanpeng Li , Vitaly Kuznetsov , Sean Christopherson , Peter Zijlstra , Juergen Gross , Stefano Stabellini , Oleksandr Tyshchenko , Josh Poimboeuf , "Paul E . McKenney" , Catalin Marinas , Randy Dunlap , Steven Rostedt , Kim Phillips , Xin Li , Hyeonggon Yoo <42.hyeyoo@gmail.com>, "Liam R . Howlett" , Sebastian Reichel , "Kirill A . Shutemov" , Suren Baghdasaryan , Pawan Gupta , Babu Moger , Jim Mattson , Sandipan Das , Lai Jiangshan , Hans de Goede , Reinette Chatre , Daniel Sneddon , Breno Leitao , Nikunj A Dadhania , Brian Gerst , Sami Tolvanen , Alexander Potapenko , Andrew Morton , Arnd Bergmann , "Eric W . Biederman" , Kees Cook , Masami Hiramatsu , Masahiro Yamada , Ze Gao , Fei Li , Conghui , Ashok Raj , "Jason A . Donenfeld" , Mark Rutland , Jacob Pan , Jiapeng Chong , Jane Malalane , David Woodhouse , Boris Ostrovsky , Arnaldo Carvalho de Melo , Yantengsi , Christophe Leroy , Sathvika Vasireddy Subject: [PATCH RESEND v9 02/36] x86/fred: Add Kconfig option for FRED (CONFIG_X86_FRED) Date: Tue, 1 Aug 2023 01:32:44 -0700 Message-Id: <20230801083318.8363-3-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 From: "H. Peter Anvin (Intel)" Add the configuration option CONFIG_X86_FRED to enable FRED. Signed-off-by: H. Peter Anvin (Intel) Tested-by: Shan Kang Signed-off-by: Xin Li --- arch/x86/Kconfig | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 7422db409770..700d94cb8330 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -494,6 +494,15 @@ config X86_CPU_RESCTRL Say N if unsure. +config X86_FRED + bool "Flexible Return and Event Delivery" + depends on X86_64 + help + When enabled, try to use Flexible Return and Event Delivery + instead of the legacy SYSCALL/SYSENTER/IDT architecture for + ring transitions and exception/interrupt handling if the + system supports. + if X86_32 config X86_BIGSMP bool "Support for big SMP systems with more than 8 CPUs"