From patchwork Tue Oct 3 06:24:28 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Li, Xin3" X-Patchwork-Id: 13406819 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 A8D22E75433 for ; Tue, 3 Oct 2023 06:55:08 +0000 (UTC) Received: from list by lists.xenproject.org with outflank-mailman.611896.951585 (Exim 4.92) (envelope-from ) id 1qnZIv-0005hw-2p; Tue, 03 Oct 2023 06:54:49 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 611896.951585; Tue, 03 Oct 2023 06:54:49 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1qnZIu-0005fe-P0; Tue, 03 Oct 2023 06:54:48 +0000 Received: by outflank-mailman (input) for mailman id 611896; Tue, 03 Oct 2023 06:54:46 +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 1qnZIs-00047B-QR for xen-devel@lists.xenproject.org; Tue, 03 Oct 2023 06:54:46 +0000 Received: from mgamail.intel.com (mgamail.intel.com [134.134.136.126]) by se1-gles-flk1.inumbo.com (Halon) with ESMTPS id bb899e94-61b9-11ee-9b0d-b553b5be7939; Tue, 03 Oct 2023 08:54:44 +0200 (CEST) Received: from fmsmga005.fm.intel.com ([10.253.24.32]) by orsmga106.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 02 Oct 2023 23:54:38 -0700 Received: from unknown (HELO fred..) ([172.25.112.68]) by fmsmga005.fm.intel.com with ESMTP; 02 Oct 2023 23:54:37 -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: bb899e94-61b9-11ee-9b0d-b553b5be7939 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1696316084; x=1727852084; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=Z2I9XuVKzLs7Gkjt7VvwoncwktLr23Bll2CpTX5dzXE=; b=WRGo1LmfTzchv/zGaf1PhdyXLf1nFrZB7pJ1rAQEn4Ec0X7WcZ7tuhE/ HG3N8WF4pEeG6Hic55H4oit3nlB6eQCzdostElyySJAQEtdo0OloBXPTR lPTvc6rC06RoYveEHl7uURKONN5Irh/tTm+sHWO2IuDPKi/8kdV+uNMhX p5bPapXu6WHXDpxlY9UMDCWuQ1j6vqb3gPJyjvfE7KL+6cSDLE96ibAsx vNW5i18/2RXLJOcczYDXP9zOt7gwMPYLUQ1Rv5TJJWWZzoG33+AeUG5BO sfzStAMx8nuNV/omWKY0kppffQToPwQkXb/ypPKNplEAqsoCs1x1omPYH w==; X-IronPort-AV: E=McAfee;i="6600,9927,10851"; a="367857979" X-IronPort-AV: E=Sophos;i="6.03,196,1694761200"; d="scan'208";a="367857979" X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10851"; a="1081900916" X-IronPort-AV: E=Sophos;i="6.03,196,1694761200"; d="scan'208";a="1081900916" 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 v12 07/37] x86/fred: Add Kconfig option for FRED (CONFIG_X86_FRED) Date: Mon, 2 Oct 2023 23:24:28 -0700 Message-Id: <20231003062458.23552-8-xin3.li@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20231003062458.23552-1-xin3.li@intel.com> References: <20231003062458.23552-1-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 433f5e1906d1..5ef2f6fe0681 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"