From patchwork Mon Jul 31 06:41:31 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Li, Xin3" X-Patchwork-Id: 13333812 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 3CE65C04E69 for ; Mon, 31 Jul 2023 07:14:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229892AbjGaHOz (ORCPT ); Mon, 31 Jul 2023 03:14:55 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53066 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231389AbjGaHMT (ORCPT ); Mon, 31 Jul 2023 03:12:19 -0400 Received: from mgamail.intel.com (unknown [134.134.136.31]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0BDBD3C2F; Mon, 31 Jul 2023 00:10:24 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1690787425; x=1722323425; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=g76n0qqOm69A/O2uudI0FugS1H+Frufn6xIPQbl7rb0=; b=jMH4gTLRnsxoiPbhogqlJMq1DJBR7igoG12cNvXjV7ZVulpLOKH0o1+W 1Xzl+n3dO50lcZjAbaKCufhe3xHOyPfIpwakzmf+/wwxaYku11GWzJ7yP SJSpyDJwIR9hbUD3oDFWhdN+SW9qxR2WeV/zcUbhXcbMcUyPRHZv7J+gf 17GTZWMZZfvSe/ETEbhTzDhQO/kHTUgDWLVF0yxJy3RJ4oFWFfl6lAxUI 9gke3crME7gla6vaOddT5JFkpM9TXaaLlvmqIfefe5J6kNHrY6D3GEBi/ DYvwMt8SHUWYHSEFXJnepjpPenMKrBPEaybm+8ug13xyjFAx2eFfSehyN A==; X-IronPort-AV: E=McAfee;i="6600,9927,10787"; a="432750225" X-IronPort-AV: E=Sophos;i="6.01,244,1684825200"; d="scan'208";a="432750225" Received: from fmsmga004.fm.intel.com ([10.253.24.48]) by orsmga104.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 31 Jul 2023 00:10:14 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10787"; a="798157799" X-IronPort-AV: E=Sophos;i="6.01,244,1684825200"; d="scan'208";a="798157799" Received: from unknown (HELO fred..) ([172.25.112.68]) by fmsmga004.fm.intel.com with ESMTP; 31 Jul 2023 00:10:09 -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 34/36] x86/syscall: Split IDT syscall setup code into idt_syscall_init() Date: Sun, 30 Jul 2023 23:41:31 -0700 Message-Id: <20230731064133.3881-5-xin3.li@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230731064133.3881-1-xin3.li@intel.com> References: <20230731064133.3881-1-xin3.li@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org Split IDT syscall setup code into idt_syscall_init() to make it cleaner to add FRED syscall setup code. Suggested-by: Thomas Gleixner Tested-by: Shan Kang Signed-off-by: Xin Li --- arch/x86/kernel/cpu/common.c | 13 ++++++++++--- 1 file changed, 10 insertions(+), 3 deletions(-) diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c index 331b06d19f7f..bb03dacc5fb8 100644 --- a/arch/x86/kernel/cpu/common.c +++ b/arch/x86/kernel/cpu/common.c @@ -2027,10 +2027,8 @@ static void wrmsrl_cstar(unsigned long val) wrmsrl(MSR_CSTAR, val); } -/* May not be marked __init: used by software suspend */ -void syscall_init(void) +static inline void idt_syscall_init(void) { - wrmsr(MSR_STAR, 0, (__USER32_CS << 16) | __KERNEL_CS); wrmsrl(MSR_LSTAR, (unsigned long)entry_SYSCALL_64); #ifdef CONFIG_IA32_EMULATION @@ -2064,6 +2062,15 @@ void syscall_init(void) X86_EFLAGS_AC|X86_EFLAGS_ID); } +/* May not be marked __init: used by software suspend */ +void syscall_init(void) +{ + /* The default user and kernel segments */ + wrmsr(MSR_STAR, 0, (__USER32_CS << 16) | __KERNEL_CS); + + idt_syscall_init(); +} + #else /* CONFIG_X86_64 */ #ifdef CONFIG_STACKPROTECTOR