From patchwork Sat Sep 23 09:41:42 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Li, Xin3" X-Patchwork-Id: 13396596 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 96B33CE7AA0 for ; Sat, 23 Sep 2023 10:12:02 +0000 (UTC) Received: from list by lists.xenproject.org with outflank-mailman.607089.945316 (Exim 4.92) (envelope-from ) id 1qjzc8-0002Eg-PC; Sat, 23 Sep 2023 10:11:52 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 607089.945316; Sat, 23 Sep 2023 10:11:52 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1qjzc8-0002ED-Jn; Sat, 23 Sep 2023 10:11:52 +0000 Received: by outflank-mailman (input) for mailman id 607089; Sat, 23 Sep 2023 10:11:51 +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 1qjzc7-0000Pn-5G for xen-devel@lists.xenproject.org; Sat, 23 Sep 2023 10:11:51 +0000 Received: from mgamail.intel.com (mgamail.intel.com [134.134.136.100]) by se1-gles-flk1.inumbo.com (Halon) with ESMTPS id 9a380aa3-59f9-11ee-9b0d-b553b5be7939; Sat, 23 Sep 2023 12:11:46 +0200 (CEST) Received: from fmsmga008.fm.intel.com ([10.253.24.58]) by orsmga105.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 23 Sep 2023 03:11:39 -0700 Received: from unknown (HELO fred..) ([172.25.112.68]) by fmsmga008.fm.intel.com with ESMTP; 23 Sep 2023 03:11:39 -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: 9a380aa3-59f9-11ee-9b0d-b553b5be7939 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1695463906; x=1726999906; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=FhC/0k2yq7T7yCxf9L591KcnQJP82j/O9GzJYrzxumw=; b=dmDsfVyDX9rVK3SfLX+OZDBK/sWHUt7ayiKzahqeKefTf3Ujnl4Yle7r OdW4Lk/xaqlp7Qr2AUrQt6Aibo4Hf7BqjDuqhK9mLLkPhnuHTLTlkP3aU KJdk7uadDnMMRn3AzXr4lz8zIUz+ljlUUrPkwtzFa523M33UazWncE8sl z1YUpG64YfqVmqPXpvT5nrgnwGxzQp0ROO+O2hxUyRcI6+P6bVvEEEmZ7 RkeG/7WlY34U4eq7inTpqTXgBdaIifQu+yhj0jwF62um90QQX1EitEoM5 /uJp1IYAJU9pkbEnmTyspG4KAExwRhfVQ+tCv+YzzaZ+ivUxOwAqlvL3S g==; X-IronPort-AV: E=McAfee;i="6600,9927,10841"; a="447492156" X-IronPort-AV: E=Sophos;i="6.03,171,1694761200"; d="scan'208";a="447492156" X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10841"; a="813388125" X-IronPort-AV: E=Sophos;i="6.03,171,1694761200"; d="scan'208";a="813388125" 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: tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com, luto@kernel.org, pbonzini@redhat.com, seanjc@google.com, peterz@infradead.org, jgross@suse.com, ravi.v.shankar@intel.com, mhiramat@kernel.org, andrew.cooper3@citrix.com, jiangshanlai@gmail.com, nik.borisov@suse.com Subject: [PATCH v11 07/37] x86/fred: Add Kconfig option for FRED (CONFIG_X86_FRED) Date: Sat, 23 Sep 2023 02:41:42 -0700 Message-Id: <20230923094212.26520-8-xin3.li@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230923094212.26520-1-xin3.li@intel.com> References: <20230923094212.26520-1-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 3154dbc49cf5..c3dd317d476c 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -496,6 +496,15 @@ 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"