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([172.25.112.68]) by fmsmga004.fm.intel.com with ESMTP; 31 Jul 2023 00:10:09 -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: 4eaa67a3-2f71-11ee-b254-6b7b168915f2 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1690787419; x=1722323419; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=g76n0qqOm69A/O2uudI0FugS1H+Frufn6xIPQbl7rb0=; b=JPuhIYzpH6H4s8kKu+qdo5s+M8ul37eCfJR12xhkmS9nDdVbErviuSQQ ufhtYITzWOoe69Uq2C2/YMU9vB98LxTH58uh3NstKWLeuRAHIETVuxzx7 /Bcu2+yr62Nz0EfkMPk1wPc6prXoMbHppVFAwj6Y5SinpLet0Lp33+1nZ MDvbNJaqHZHP1aG+VD2Tf4xNhOb6B9YovbSF1EchmZh2DA0qyyQsbBKHz oEHqPZdWemKNJHmlmn9ixabfXjqaU0XOiFWspIPc2q228A0N1UtQRHAtm vym0SlCESOwR7LAv+ojFW020NpytWa1o1imI+xhY5prQZhx1gnnDJhBzb g==; X-IronPort-AV: E=McAfee;i="6600,9927,10787"; a="432750181" X-IronPort-AV: E=Sophos;i="6.01,244,1684825200"; d="scan'208";a="432750181" 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" 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 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