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yaml --- r: 79798 b: refs/heads/master c: 6abcd98 h: refs/heads/master v: v3
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Glauber de Oliveira Costa
authored and
Ingo Molnar
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Jan 30, 2008
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,2 +1,2 @@ | ||
| --- | ||
| refs/heads/master: 416b72182ac3f3f4931ed17d0256b1d805d1b553 | ||
| refs/heads/master: 6abcd98ffafbff81f0bfd7ee1d129e634af13245 |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,5 +1,245 @@ | ||
| #ifdef CONFIG_X86_32 | ||
| # include "irqflags_32.h" | ||
| #ifndef _X86_IRQFLAGS_H_ | ||
| #define _X86_IRQFLAGS_H_ | ||
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| #include <asm/processor-flags.h> | ||
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| #ifndef __ASSEMBLY__ | ||
| /* | ||
| * Interrupt control: | ||
| */ | ||
|
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| static inline unsigned long native_save_fl(void) | ||
| { | ||
| unsigned long flags; | ||
|
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| __asm__ __volatile__( | ||
| "# __raw_save_flags\n\t" | ||
| "pushf ; pop %0" | ||
| : "=g" (flags) | ||
| : /* no input */ | ||
| : "memory" | ||
| ); | ||
|
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| return flags; | ||
| } | ||
|
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| static inline void native_restore_fl(unsigned long flags) | ||
| { | ||
| __asm__ __volatile__( | ||
| "push %0 ; popf" | ||
| : /* no output */ | ||
| :"g" (flags) | ||
| :"memory", "cc" | ||
| ); | ||
| } | ||
|
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| static inline void native_irq_disable(void) | ||
| { | ||
| asm volatile("cli": : :"memory"); | ||
| } | ||
|
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| static inline void native_irq_enable(void) | ||
| { | ||
| asm volatile("sti": : :"memory"); | ||
| } | ||
|
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| static inline void native_safe_halt(void) | ||
| { | ||
| asm volatile("sti; hlt": : :"memory"); | ||
| } | ||
|
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| static inline void native_halt(void) | ||
| { | ||
| asm volatile("hlt": : :"memory"); | ||
| } | ||
|
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| #endif | ||
|
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| #ifdef CONFIG_PARAVIRT | ||
| #include <asm/paravirt.h> | ||
| #else | ||
| #ifndef __ASSEMBLY__ | ||
|
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| static inline unsigned long __raw_local_save_flags(void) | ||
| { | ||
| return native_save_fl(); | ||
| } | ||
|
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| static inline void raw_local_irq_restore(unsigned long flags) | ||
| { | ||
| native_restore_fl(flags); | ||
| } | ||
|
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| static inline void raw_local_irq_disable(void) | ||
| { | ||
| native_irq_disable(); | ||
| } | ||
|
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| static inline void raw_local_irq_enable(void) | ||
| { | ||
| native_irq_enable(); | ||
| } | ||
|
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| /* | ||
| * Used in the idle loop; sti takes one instruction cycle | ||
| * to complete: | ||
| */ | ||
| static inline void raw_safe_halt(void) | ||
| { | ||
| native_safe_halt(); | ||
| } | ||
|
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| /* | ||
| * Used when interrupts are already enabled or to | ||
| * shutdown the processor: | ||
| */ | ||
| static inline void halt(void) | ||
| { | ||
| native_halt(); | ||
| } | ||
|
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| /* | ||
| * For spinlocks, etc: | ||
| */ | ||
| static inline unsigned long __raw_local_irq_save(void) | ||
| { | ||
| unsigned long flags = __raw_local_save_flags(); | ||
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| raw_local_irq_disable(); | ||
|
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| return flags; | ||
| } | ||
| #else | ||
|
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| #define ENABLE_INTERRUPTS(x) sti | ||
| #define DISABLE_INTERRUPTS(x) cli | ||
|
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| #ifdef CONFIG_X86_64 | ||
| #define INTERRUPT_RETURN iretq | ||
| #define ENABLE_INTERRUPTS_SYSCALL_RET \ | ||
| movq %gs:pda_oldrsp, %rsp; \ | ||
| swapgs; \ | ||
| sysretq; | ||
| #else | ||
| #define INTERRUPT_RETURN iret | ||
| #define ENABLE_INTERRUPTS_SYSCALL_RET sti; sysexit | ||
| #define GET_CR0_INTO_EAX movl %cr0, %eax | ||
| #endif | ||
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|
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| #endif /* __ASSEMBLY__ */ | ||
| #endif /* CONFIG_PARAVIRT */ | ||
|
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| #ifndef __ASSEMBLY__ | ||
| #define raw_local_save_flags(flags) \ | ||
| do { (flags) = __raw_local_save_flags(); } while (0) | ||
|
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| #define raw_local_irq_save(flags) \ | ||
| do { (flags) = __raw_local_irq_save(); } while (0) | ||
|
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| static inline int raw_irqs_disabled_flags(unsigned long flags) | ||
| { | ||
| return !(flags & X86_EFLAGS_IF); | ||
| } | ||
|
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| static inline int raw_irqs_disabled(void) | ||
| { | ||
| unsigned long flags = __raw_local_save_flags(); | ||
|
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| return raw_irqs_disabled_flags(flags); | ||
| } | ||
|
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| /* | ||
| * makes the traced hardirq state match with the machine state | ||
| * | ||
| * should be a rarely used function, only in places where its | ||
| * otherwise impossible to know the irq state, like in traps. | ||
| */ | ||
| static inline void trace_hardirqs_fixup_flags(unsigned long flags) | ||
| { | ||
| if (raw_irqs_disabled_flags(flags)) | ||
| trace_hardirqs_off(); | ||
| else | ||
| trace_hardirqs_on(); | ||
| } | ||
|
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| static inline void trace_hardirqs_fixup(void) | ||
| { | ||
| unsigned long flags = __raw_local_save_flags(); | ||
|
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| trace_hardirqs_fixup_flags(flags); | ||
| } | ||
|
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| #else | ||
| # include "irqflags_64.h" | ||
|
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| #ifdef CONFIG_X86_64 | ||
| /* | ||
| * 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 ARCH_TRACE_IRQS_ON call trace_hardirqs_on_thunk | ||
| #define ARCH_TRACE_IRQS_OFF call trace_hardirqs_off_thunk | ||
| #define ARCH_LOCKDEP_SYS_EXIT call lockdep_sys_exit_thunk | ||
| #define ARCH_LOCKDEP_SYS_EXIT_IRQ \ | ||
| TRACE_IRQS_ON; \ | ||
| sti; \ | ||
| SAVE_REST; \ | ||
| LOCKDEP_SYS_EXIT; \ | ||
| RESTORE_REST; \ | ||
| cli; \ | ||
| TRACE_IRQS_OFF; | ||
|
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| #else | ||
| #define ARCH_TRACE_IRQS_ON \ | ||
| pushl %eax; \ | ||
| pushl %ecx; \ | ||
| pushl %edx; \ | ||
| call trace_hardirqs_on; \ | ||
| popl %edx; \ | ||
| popl %ecx; \ | ||
| popl %eax; | ||
|
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| #define ARCH_TRACE_IRQS_OFF \ | ||
| pushl %eax; \ | ||
| pushl %ecx; \ | ||
| pushl %edx; \ | ||
| call trace_hardirqs_off; \ | ||
| popl %edx; \ | ||
| popl %ecx; \ | ||
| popl %eax; | ||
|
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| #define ARCH_LOCKDEP_SYS_EXIT \ | ||
| pushl %eax; \ | ||
| pushl %ecx; \ | ||
| pushl %edx; \ | ||
| call lockdep_sys_exit; \ | ||
| popl %edx; \ | ||
| popl %ecx; \ | ||
| popl %eax; | ||
|
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| #define ARCH_LOCKDEP_SYS_EXIT_IRQ | ||
| #endif | ||
|
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| #ifdef CONFIG_TRACE_IRQFLAGS | ||
| # define TRACE_IRQS_ON ARCH_TRACE_IRQS_ON | ||
| # define TRACE_IRQS_OFF ARCH_TRACE_IRQS_OFF | ||
| #else | ||
| # define TRACE_IRQS_ON | ||
| # define TRACE_IRQS_OFF | ||
| #endif | ||
| #ifdef CONFIG_DEBUG_LOCK_ALLOC | ||
| # define LOCKDEP_SYS_EXIT ARCH_LOCKDEP_SYS_EXIT | ||
| # define LOCKDEP_SYS_EXIT_IRQ ARCH_LOCKDEP_SYS_EXIT_IRQ | ||
| # else | ||
| # define LOCKDEP_SYS_EXIT | ||
| # define LOCKDEP_SYS_EXIT_IRQ | ||
| # endif | ||
|
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| #endif /* __ASSEMBLY__ */ | ||
| #endif |
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