linux/arch/x86/include
Juergen Gross ab234a260b x86/pv: Rework arch_local_irq_restore() to not use popf
POPF is a rather expensive operation, so don't use it for restoring
irq flags. Instead, test whether interrupts are enabled in the flags
parameter and enable interrupts via STI in that case.

This results in the restore_fl paravirt op to be no longer needed.

Suggested-by: Andy Lutomirski <luto@kernel.org>
Signed-off-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: https://lkml.kernel.org/r/20210120135555.32594-7-jgross@suse.com
2021-02-10 12:36:45 +01:00
..
asm x86/pv: Rework arch_local_irq_restore() to not use popf 2021-02-10 12:36:45 +01:00
uapi/asm ARM: 2020-12-20 10:44:05 -08:00