1 #ifndef _X86_IRQFLAGS_H_
2 #define _X86_IRQFLAGS_H_
4 #include <asm/processor-flags.h>
11 static inline unsigned long native_save_fl(void)
15 asm volatile("# __raw_save_flags\n\t"
24 static inline void native_restore_fl(unsigned long flags)
26 asm volatile("push %0 ; popf"
32 static inline void native_irq_disable(void)
34 asm volatile("cli": : :"memory");
37 static inline void native_irq_enable(void)
39 asm volatile("sti": : :"memory");
42 static inline void native_safe_halt(void)
44 asm volatile("sti; hlt": : :"memory");
47 static inline void native_halt(void)
49 asm volatile("hlt": : :"memory");
54 #ifdef CONFIG_PARAVIRT
55 #include <asm/paravirt.h>
59 static inline unsigned long __raw_local_save_flags(void)
61 return native_save_fl();
64 static inline void raw_local_irq_restore(unsigned long flags)
66 native_restore_fl(flags);
69 static inline void raw_local_irq_disable(void)
74 static inline void raw_local_irq_enable(void)
80 * Used in the idle loop; sti takes one instruction cycle
83 static inline void raw_safe_halt(void)
89 * Used when interrupts are already enabled or to
90 * shutdown the processor:
92 static inline void halt(void)
100 static inline unsigned long __raw_local_irq_save(void)
102 unsigned long flags = __raw_local_save_flags();
104 raw_local_irq_disable();
110 #define ENABLE_INTERRUPTS(x) sti
111 #define DISABLE_INTERRUPTS(x) cli
114 #define INTERRUPT_RETURN iretq
115 #define ENABLE_INTERRUPTS_SYSCALL_RET \
116 movq %gs:pda_oldrsp, %rsp; \
120 #define INTERRUPT_RETURN iret
121 #define ENABLE_INTERRUPTS_SYSCALL_RET sti; sysexit
122 #define GET_CR0_INTO_EAX movl %cr0, %eax
126 #endif /* __ASSEMBLY__ */
127 #endif /* CONFIG_PARAVIRT */
130 #define raw_local_save_flags(flags) \
131 do { (flags) = __raw_local_save_flags(); } while (0)
133 #define raw_local_irq_save(flags) \
134 do { (flags) = __raw_local_irq_save(); } while (0)
136 static inline int raw_irqs_disabled_flags(unsigned long flags)
138 return !(flags & X86_EFLAGS_IF);
141 static inline int raw_irqs_disabled(void)
143 unsigned long flags = __raw_local_save_flags();
145 return raw_irqs_disabled_flags(flags);
149 * makes the traced hardirq state match with the machine state
151 * should be a rarely used function, only in places where its
152 * otherwise impossible to know the irq state, like in traps.
154 static inline void trace_hardirqs_fixup_flags(unsigned long flags)
156 if (raw_irqs_disabled_flags(flags))
157 trace_hardirqs_off();
162 static inline void trace_hardirqs_fixup(void)
164 unsigned long flags = __raw_local_save_flags();
166 trace_hardirqs_fixup_flags(flags);
173 * Currently paravirt can't handle swapgs nicely when we
174 * don't have a stack we can rely on (such as a user space
175 * stack). So we either find a way around these or just fault
176 * and emulate if a guest tries to call swapgs directly.
178 * Either way, this is a good way to document that we don't
179 * have a reliable stack. x86_64 only.
181 #define SWAPGS_UNSAFE_STACK swapgs
182 #define ARCH_TRACE_IRQS_ON call trace_hardirqs_on_thunk
183 #define ARCH_TRACE_IRQS_OFF call trace_hardirqs_off_thunk
184 #define ARCH_LOCKDEP_SYS_EXIT call lockdep_sys_exit_thunk
185 #define ARCH_LOCKDEP_SYS_EXIT_IRQ \
195 #define ARCH_TRACE_IRQS_ON \
199 call trace_hardirqs_on; \
204 #define ARCH_TRACE_IRQS_OFF \
208 call trace_hardirqs_off; \
213 #define ARCH_LOCKDEP_SYS_EXIT \
217 call lockdep_sys_exit; \
222 #define ARCH_LOCKDEP_SYS_EXIT_IRQ
225 #ifdef CONFIG_TRACE_IRQFLAGS
226 # define TRACE_IRQS_ON ARCH_TRACE_IRQS_ON
227 # define TRACE_IRQS_OFF ARCH_TRACE_IRQS_OFF
229 # define TRACE_IRQS_ON
230 # define TRACE_IRQS_OFF
232 #ifdef CONFIG_DEBUG_LOCK_ALLOC
233 # define LOCKDEP_SYS_EXIT ARCH_LOCKDEP_SYS_EXIT
234 # define LOCKDEP_SYS_EXIT_IRQ ARCH_LOCKDEP_SYS_EXIT_IRQ
236 # define LOCKDEP_SYS_EXIT
237 # define LOCKDEP_SYS_EXIT_IRQ
240 #endif /* __ASSEMBLY__ */