From patchwork Mon Jul 31 06:32:43 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Li, Xin3" X-Patchwork-Id: 13333721 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id EBA68C05051 for ; Mon, 31 Jul 2023 07:02:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230364AbjGaHCD (ORCPT ); Mon, 31 Jul 2023 03:02:03 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42612 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230349AbjGaHCB (ORCPT ); Mon, 31 Jul 2023 03:02:01 -0400 Received: from mgamail.intel.com (unknown [134.134.136.24]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A09ED184; Mon, 31 Jul 2023 00:01:59 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1690786919; x=1722322919; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=7IEqijDovSKiraXkZB5AveXiayuWDixrga5p5CTJEmM=; b=eNffPAdqZYVpE0SQIcUnjPMlISiEnefqsWNzEhUsGvoBWMCcTZepKuXK h1qF9aXTJa6dsD+b6nBQKSUFG+zpKDzoJD+B2hSryCKx0LP6kYpHkAgYM 8zGiD4e/lPOU4A9Q+iqIk2PV+djrBToaH7fVl6q4m18vA4Gp4LjslFVEB oQSfUOo6E7NCy1yO9aFlkFqtX95Yt7UzhNyRh6XOcBs02A53wlsOk/ep4 nj7I/AXCZphQil9T/atxPHWoR1CCGhBoKjBX1lzo1wgOl/4bd/75O7C/N ealV3JIWpoOxp+NoS47P33ry8kSM6XVFVeV+5C4qXjrmpCvWUJc7ZvEhg Q==; X-IronPort-AV: E=McAfee;i="6600,9927,10787"; a="371648633" X-IronPort-AV: E=Sophos;i="6.01,244,1684825200"; d="scan'208";a="371648633" Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by orsmga102.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 31 Jul 2023 00:01:51 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.01,202,1684825200"; d="scan'208";a="871543342" Received: from unknown (HELO fred..) ([172.25.112.68]) by fmsmga001.fm.intel.com with ESMTP; 31 Jul 2023 00:01:52 -0700 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 , Jiaxi Chen , 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 v9 02/36] x86/fred: Add Kconfig option for FRED (CONFIG_X86_FRED) Date: Sun, 30 Jul 2023 23:32:43 -0700 Message-Id: <20230731063317.3720-3-xin3.li@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230731063317.3720-1-xin3.li@intel.com> References: <20230731063317.3720-1-xin3.li@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org 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"