From: Xin Li <xin3.li@intel.com>
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 <corbet@lwn.net>,
Thomas Gleixner <tglx@linutronix.de>,
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Subject: [PATCH RESEND v9 34/36] x86/syscall: Split IDT syscall setup code into idt_syscall_init()
Date: Tue, 1 Aug 2023 01:35:51 -0700 [thread overview]
Message-ID: <20230801083553.8468-8-xin3.li@intel.com> (raw)
In-Reply-To: <20230801083553.8468-1-xin3.li@intel.com>
Split IDT syscall setup code into idt_syscall_init() to make it
cleaner to add FRED syscall setup code.
Suggested-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Shan Kang <shan.kang@intel.com>
Signed-off-by: Xin Li <xin3.li@intel.com>
---
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
--
2.34.1
next prev parent reply other threads:[~2023-08-01 9:08 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-08-01 8:35 [PATCH RESEND v9 27/36] x86/traps: Add external_interrupt() to dispatch external interrupts Xin Li
2023-08-01 8:35 ` [PATCH RESEND v9 28/36] x86/idtentry: Incorporate declaration/definition of the FRED exception handler type Xin Li
2023-08-01 8:35 ` [PATCH RESEND v9 29/36] x86/fred: FRED entry/exit and dispatch code Xin Li
2023-08-01 8:35 ` [PATCH RESEND v9 30/36] x86/fred: Fixup fault on ERETU by jumping to fred_entrypoint_user Xin Li
2023-08-01 8:35 ` [PATCH RESEND v9 31/36] x86/traps: Export external_interrupt() for handling IRQ in IRQ induced VM exits Xin Li
2023-08-01 8:35 ` [PATCH RESEND v9 32/36] x86/fred: Export fred_entrypoint_kernel() for handling NMI in NMI " Xin Li
2023-08-01 8:35 ` [PATCH RESEND v9 33/36] KVM: VMX: Add VMX_DO_FRED_EVENT_IRQOFF for IRQ/NMI handling Xin Li
2023-08-01 19:01 ` Sean Christopherson
2023-08-01 19:37 ` Peter Zijlstra
2023-08-01 19:49 ` Sean Christopherson
2023-08-01 23:18 ` Li, Xin3
2023-08-03 16:58 ` Li, Xin3
2023-08-01 8:35 ` Xin Li [this message]
2023-08-01 8:35 ` [PATCH RESEND v9 35/36] x86/fred: FRED initialization code Xin Li
2023-08-01 8:35 ` [PATCH RESEND v9 36/36] x86/fred: Disable FRED by default in its early stage Xin Li
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