From a5969cabbb4660eab42b6ef0412cbbd1200cf14d Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Sat, 12 Oct 2024 07:10:09 +0000
Subject: [PATCH] 修改led为gpio
---
kernel/arch/x86/include/asm/irqflags.h | 90 ++++++++++++---------------------------------
1 files changed, 24 insertions(+), 66 deletions(-)
diff --git a/kernel/arch/x86/include/asm/irqflags.h b/kernel/arch/x86/include/asm/irqflags.h
index c99c66b..8c86ede 100644
--- a/kernel/arch/x86/include/asm/irqflags.h
+++ b/kernel/arch/x86/include/asm/irqflags.h
@@ -9,7 +9,7 @@
#include <asm/nospec-branch.h>
/* Provide __cpuidle; we can't safely include <linux/cpu.h> */
-#define __cpuidle __attribute__((__section__(".cpuidle.text")))
+#define __cpuidle __section(".cpuidle.text")
/*
* Interrupt control:
@@ -17,7 +17,7 @@
/* Declaration required for gcc < 4.9 to prevent -Werror=missing-prototypes */
extern inline unsigned long native_save_fl(void);
-extern inline unsigned long native_save_fl(void)
+extern __always_inline unsigned long native_save_fl(void)
{
unsigned long flags;
@@ -44,12 +44,12 @@
:"memory", "cc");
}
-static inline void native_irq_disable(void)
+static __always_inline void native_irq_disable(void)
{
asm volatile("cli": : :"memory");
}
-static inline void native_irq_enable(void)
+static __always_inline void native_irq_enable(void)
{
asm volatile("sti": : :"memory");
}
@@ -68,28 +68,28 @@
#endif
-#ifdef CONFIG_PARAVIRT
+#ifdef CONFIG_PARAVIRT_XXL
#include <asm/paravirt.h>
#else
#ifndef __ASSEMBLY__
#include <linux/types.h>
-static inline notrace unsigned long arch_local_save_flags(void)
+static __always_inline unsigned long arch_local_save_flags(void)
{
return native_save_fl();
}
-static inline notrace void arch_local_irq_restore(unsigned long flags)
+static __always_inline void arch_local_irq_restore(unsigned long flags)
{
native_restore_fl(flags);
}
-static inline notrace void arch_local_irq_disable(void)
+static __always_inline void arch_local_irq_disable(void)
{
native_irq_disable();
}
-static inline notrace void arch_local_irq_enable(void)
+static __always_inline void arch_local_irq_enable(void)
{
native_irq_enable();
}
@@ -115,7 +115,7 @@
/*
* For spinlocks, etc:
*/
-static inline notrace unsigned long arch_local_irq_save(void)
+static __always_inline unsigned long arch_local_irq_save(void)
{
unsigned long flags = arch_local_save_flags();
arch_local_irq_disable();
@@ -127,19 +127,9 @@
#define DISABLE_INTERRUPTS(x) cli
#ifdef CONFIG_X86_64
-#define SWAPGS swapgs
-/*
- * Currently paravirt can't handle swapgs nicely when we
- * don't have a stack we can rely on (such as a user space
- * stack). So we either find a way around these or just fault
- * and emulate if a guest tries to call swapgs directly.
- *
- * Either way, this is a good way to document that we don't
- * have a reliable stack. x86_64 only.
- */
-#define SWAPGS_UNSAFE_STACK swapgs
-
-#define PARAVIRT_ADJUST_EXCEPTION_FRAME /* */
+#ifdef CONFIG_DEBUG_ENTRY
+#define SAVE_FLAGS(x) pushfq; popq %rax
+#endif
#define INTERRUPT_RETURN jmp native_iret
#define USERGS_SYSRET64 \
@@ -149,65 +139,33 @@
swapgs; \
sysretl
-#ifdef CONFIG_DEBUG_ENTRY
-#define SAVE_FLAGS(x) pushfq; popq %rax
-#endif
#else
#define INTERRUPT_RETURN iret
-#define ENABLE_INTERRUPTS_SYSEXIT sti; sysexit
-#define GET_CR0_INTO_EAX movl %cr0, %eax
#endif
-
#endif /* __ASSEMBLY__ */
-#endif /* CONFIG_PARAVIRT */
+#endif /* CONFIG_PARAVIRT_XXL */
#ifndef __ASSEMBLY__
-static inline int arch_irqs_disabled_flags(unsigned long flags)
+static __always_inline int arch_irqs_disabled_flags(unsigned long flags)
{
return !(flags & X86_EFLAGS_IF);
}
-static inline int arch_irqs_disabled(void)
+static __always_inline int arch_irqs_disabled(void)
{
unsigned long flags = arch_local_save_flags();
return arch_irqs_disabled_flags(flags);
}
+#else
+#ifdef CONFIG_X86_64
+#ifdef CONFIG_XEN_PV
+#define SWAPGS ALTERNATIVE "swapgs", "", X86_FEATURE_XENPV
+#else
+#define SWAPGS swapgs
+#endif
+#endif
#endif /* !__ASSEMBLY__ */
-
-#ifdef __ASSEMBLY__
-#ifdef CONFIG_TRACE_IRQFLAGS
-# define TRACE_IRQS_ON call trace_hardirqs_on_thunk;
-# define TRACE_IRQS_OFF call trace_hardirqs_off_thunk;
-#else
-# define TRACE_IRQS_ON
-# define TRACE_IRQS_OFF
-#endif
-#ifdef CONFIG_DEBUG_LOCK_ALLOC
-# ifdef CONFIG_X86_64
-# define LOCKDEP_SYS_EXIT call lockdep_sys_exit_thunk
-# define LOCKDEP_SYS_EXIT_IRQ \
- TRACE_IRQS_ON; \
- sti; \
- call lockdep_sys_exit_thunk; \
- cli; \
- TRACE_IRQS_OFF;
-# else
-# define LOCKDEP_SYS_EXIT \
- pushl %eax; \
- pushl %ecx; \
- pushl %edx; \
- call lockdep_sys_exit; \
- popl %edx; \
- popl %ecx; \
- popl %eax;
-# define LOCKDEP_SYS_EXIT_IRQ
-# endif
-#else
-# define LOCKDEP_SYS_EXIT
-# define LOCKDEP_SYS_EXIT_IRQ
-#endif
-#endif /* __ASSEMBLY__ */
#endif
--
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