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([172.25.112.68]) by fmsmga006.fm.intel.com with ESMTP; 05 Dec 2023 03:21:17 -0800 X-Outflank-Mailman: Message body and most headers restored to incoming version 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: 6d95f8ea-9360-11ee-9b0f-b553b5be7939 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1701775287; x=1733311287; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=yH4lF8AAQOSRX1ndoBAeOBidmlKnduYQQwpRB60hdFM=; b=CLRHJH0LYX4q60ydssLLcA3e/OM2BQ3AzASnM92e2MUlWqlLH7y2WPs7 aO/j4MOtszdvOHP5rEXGVFS/I93CdyCZh6zHyELHZyem5YngymeJZz8bw QGQFxNl0k4DcSzZ8emPCSkVcw//o1IFSKzhlwAeMaiPHtLK302ELIr9nW NwAIzCIwRh+BbbQjIZ0sZPzSyWfZfq/7tZZNBNKs4yUguFVrshvdIIGj/ RYgxjYJxdzUYuzGcEA9v0PLQRvOOjTWiSwLkXxcGQ6xuQX3AD4+DSKPhE l03EOZG0A4p808MZKREUmCV9GOz4jQ/J0DlEMtQTxhEjYAiPRAZXr1b2V w==; X-IronPort-AV: E=McAfee;i="6600,9927,10914"; a="942375" X-IronPort-AV: E=Sophos;i="6.04,252,1695711600"; d="scan'208";a="942375" X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10914"; a="1018192911" X-IronPort-AV: E=Sophos;i="6.04,252,1695711600"; d="scan'208";a="1018192911" 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, shan.kang@intel.com Subject: [PATCH v13 05/35] x86/fred: Add Kconfig option for FRED (CONFIG_X86_FRED) Date: Tue, 5 Dec 2023 02:49:54 -0800 Message-ID: <20231205105030.8698-6-xin3.li@intel.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20231205105030.8698-1-xin3.li@intel.com> References: <20231205105030.8698-1-xin3.li@intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-ZohoMail-DKIM: pass (identity @intel.com) X-ZM-MESSAGEID: 1701775318689100001 Content-Type: text/plain; charset="utf-8" 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 c456c9b1fc7c..ec923d4055c5 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -492,6 +492,15 @@ config X86_CPU_RESCTRL =20 Say N if unsure. =20 +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" --=20 2.43.0