Файловый менеджер

Файловый менеджер - Редактировать - /usr/src/linux-headers-5.4.0-200/arch/x86/include/asm/irqflags.h

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/* SPDX-License-Identifier: GPL-2.0 / #ifndef _X86_IRQFLAGS_H_ #define _X86_IRQFLAGS_H_ #include <asm/processor-flags.h> #ifndef __ASSEMBLY__ #include <asm/nospec-branch.h> / Provide __cpuidle; we can't safely include <linux/cpu.h> / #define __cpuidle __attribute__((__section__(".cpuidle.text"))) / * Interrupt control: / / 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) { unsigned long flags; / * "=rm" is safe here, because "pop" adjusts the stack before * it evaluates its effective address -- this is part of the * documented behavior of the "pop" instruction. / asm volatile("# __raw_save_flags\n\t" "pushf ; pop %0" : "=rm" (flags) : / no input / : "memory"); return flags; } extern inline void native_restore_fl(unsigned long flags); extern inline void native_restore_fl(unsigned long flags) { asm volatile("push %0 ; popf" : / no output / :"g" (flags) :"memory", "cc"); } static inline void native_irq_disable(void) { asm volatile("cli": : :"memory"); } static inline void native_irq_enable(void) { asm volatile("sti": : :"memory"); } static inline __cpuidle void native_safe_halt(void) { mds_idle_clear_cpu_buffers(); asm volatile("sti; hlt": : :"memory"); } static inline __cpuidle void native_halt(void) { mds_idle_clear_cpu_buffers(); asm volatile("hlt": : :"memory"); } #endif #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) { return native_save_fl(); } static inline notrace void arch_local_irq_restore(unsigned long flags) { native_restore_fl(flags); } static inline notrace void arch_local_irq_disable(void) { native_irq_disable(); } static inline notrace void arch_local_irq_enable(void) { native_irq_enable(); } / * Used in the idle loop; sti takes one instruction cycle * to complete: / static inline __cpuidle void arch_safe_halt(void) { native_safe_halt(); } / * Used when interrupts are already enabled or to * shutdown the processor: / static inline __cpuidle void halt(void) { native_halt(); } / * For spinlocks, etc: / static inline notrace unsigned long arch_local_irq_save(void) { unsigned long flags = arch_local_save_flags(); arch_local_irq_disable(); return flags; } #else #define ENABLE_INTERRUPTS(x) sti #define DISABLE_INTERRUPTS(x) cli #ifdef CONFIG_X86_64 #ifdef CONFIG_DEBUG_ENTRY #define SAVE_FLAGS(x) pushfq; popq %rax #endif #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 INTERRUPT_RETURN jmp native_iret #define USERGS_SYSRET64 \ swapgs; \ sysretq; #define USERGS_SYSRET32 \ swapgs; \ sysretl #else #define INTERRUPT_RETURN iret #endif #endif / __ASSEMBLY__ / #endif / CONFIG_PARAVIRT_XXL / #ifndef __ASSEMBLY__ static inline int arch_irqs_disabled_flags(unsigned long flags) { return !(flags & X86_EFLAGS_IF); } static inline int arch_irqs_disabled(void) { unsigned long flags = arch_local_save_flags(); return arch_irqs_disabled_flags(flags); } #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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