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: 13396640 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 11791CE7A90 for ; Sat, 23 Sep 2023 10:11:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231400AbjIWKLw (ORCPT ); Sat, 23 Sep 2023 06:11:52 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42358 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231324AbjIWKLr (ORCPT ); Sat, 23 Sep 2023 06:11:47 -0400 Received: from mgamail.intel.com (mgamail.intel.com [134.134.136.100]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 88F0A19E; Sat, 23 Sep 2023 03:11:41 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1695463901; x=1726999901; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=FhC/0k2yq7T7yCxf9L591KcnQJP82j/O9GzJYrzxumw=; b=hpq98+2590fTxKgstoQh4pz8cFrSMNfNGl2UDVPgCeGcitdyWU3s0fgt ZcIErH+ZDvFsUkaNJZ5Qi34fAt8Z9GE5oUjwySLw0jyTsOFf3jeFCMLCc fdFPY4AMWz78YuGOwKxjr1uv5yvLygE6//LiaaQRKLKl16J3TUyQT/xCh GGATegbKT3RyYNRHfPircBicaWR1/vimirYVUnOyJ90KukGW7BzsVGO1t 7mh8lCQzClCrH0gH6YtWtYXkRmV9n9+PssD/AASk75AiIFNzyCR8htx7v oi2pKw9Lp/AzQZfEiU8qedq9+3VVJEZ/Gm0x9dqYqA3j/nXnmfrYG2fJW Q==; X-IronPort-AV: E=McAfee;i="6600,9927,10841"; a="447492155" X-IronPort-AV: E=Sophos;i="6.03,171,1694761200"; d="scan'208";a="447492155" 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 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" Received: from unknown (HELO fred..) ([172.25.112.68]) by fmsmga008.fm.intel.com with ESMTP; 23 Sep 2023 03:11:39 -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: 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 Precedence: bulk List-ID: X-Mailing-List: linux-edac@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 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"