diff options
| author | Tom Lendacky <thomas.lendacky@amd.com> | 2024-06-05 10:18:44 -0500 |
|---|---|---|
| committer | Borislav Petkov (AMD) <bp@alien8.de> | 2024-06-11 07:22:46 +0200 |
| commit | b547fc2c9927a95808ef93d7fbd5dd70679fb501 (patch) | |
| tree | 75049ad88aca4d3ca4e26ab33a5487afecfc3835 | |
| parent | c3f38fa61af77b49866b006939479069cd451173 (diff) | |
x86/irqflags: Provide native versions of the local_irq_save()/restore()
Functions that need to disable IRQs, but are common to both early boot and
post-boot execution, are unable to deal with paravirt support associated
with local_irq_save() and local_irq_restore().
Create native versions of these for use in these situations.
Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Link: https://lore.kernel.org/r/c4c33c0d07200164a3dd8cfd6da0344f57732648.1717600736.git.thomas.lendacky@amd.com
| -rw-r--r-- | arch/x86/include/asm/irqflags.h | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/arch/x86/include/asm/irqflags.h b/arch/x86/include/asm/irqflags.h index 8c5ae649d2df..cf7fc2b8e3ce 100644 --- a/arch/x86/include/asm/irqflags.h +++ b/arch/x86/include/asm/irqflags.h @@ -54,6 +54,26 @@ static __always_inline void native_halt(void) asm volatile("hlt": : :"memory"); } +static __always_inline int native_irqs_disabled_flags(unsigned long flags) +{ + return !(flags & X86_EFLAGS_IF); +} + +static __always_inline unsigned long native_local_irq_save(void) +{ + unsigned long flags = native_save_fl(); + + native_irq_disable(); + + return flags; +} + +static __always_inline void native_local_irq_restore(unsigned long flags) +{ + if (!native_irqs_disabled_flags(flags)) + native_irq_enable(); +} + #endif #ifdef CONFIG_PARAVIRT_XXL |