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authorJuergen Gross <jgross@suse.com>2021-01-20 16:55:46 +0300
committerBorislav Petkov <bp@suse.de>2021-02-10 14:36:45 +0300
commitab234a260b1f625b26cbefa93ca365b0ae66df33 (patch)
tree3308ecacbf6f66119fb14707eb506de1ab43e027 /include
parentafd30525a659ac0ae0904f0cb4a2ca75522c3123 (diff)
downloadlinux-ab234a260b1f625b26cbefa93ca365b0ae66df33.tar.xz
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
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