Messages in this thread Patch in this message | | | Subject | [PATCH] Define EFLAGS_IF | From | Rusty Russell <> | Date | Thu, 22 Mar 2007 14:16:14 +1100 |
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There is now more than one place where we use the fact that bit 9 of eflags is the interrupt-enabled flag, so define EFLAGS_IF. We make it 512 so it can be used in asm, too.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
--- a/arch/i386/lguest/lguest.c +++ b/arch/i386/lguest/lguest.c @@ -107,9 +107,8 @@ static void fastcall irq_disable(void) static void fastcall irq_enable(void) { - /* Linux i386 code expects bit 9 set. */ /* FIXME: Check if interrupt pending... */ - lguest_data.irq_enabled = 512; + lguest_data.irq_enabled = EFLAGS_IF; } static void fastcall lguest_load_gdt(const struct Xgt_desc_struct *desc) @@ -394,7 +393,7 @@ static fastcall void lguest_write_idt_en extern const char start_##name[], end_##name[]; \ asm("start_" #name ": " code "; end_" #name ":") DEF_LGUEST(cli, "movl $0," LGUEST_IRQ); -DEF_LGUEST(sti, "movl $512," LGUEST_IRQ); +DEF_LGUEST(sti, "movl $"__stringify(EFLAGS_IF)"," LGUEST_IRQ); DEF_LGUEST(popf, "movl %eax," LGUEST_IRQ); DEF_LGUEST(pushf, "movl " LGUEST_IRQ ",%eax"); DEF_LGUEST(pushf_cli, "movl " LGUEST_IRQ ",%eax; movl $0," LGUEST_IRQ); =================================================================== --- a/include/asm-i386/irqflags.h +++ b/include/asm-i386/irqflags.h @@ -87,6 +87,9 @@ static inline unsigned long __raw_local_ #endif /* __ASSEMBLY__ */ #endif /* CONFIG_PARAVIRT */ +/* Bit 9 of eflags means interrupts are enabled: a raw int for asm. */ +#define EFLAGS_IF 512 + #ifndef __ASSEMBLY__ #define raw_local_save_flags(flags) \ do { (flags) = __raw_local_save_flags(); } while (0) @@ -96,7 +99,7 @@ static inline unsigned long __raw_local_ static inline int raw_irqs_disabled_flags(unsigned long flags) { - return !(flags & (1 << 9)); + return !(flags & EFLAGS_IF); } static inline int raw_irqs_disabled(void)
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