diff options
| author | Juergen Gross <jgross@suse.com> | 2021-01-20 16:55:46 +0300 |
|---|---|---|
| committer | Borislav Petkov <bp@suse.de> | 2021-02-10 14:36:45 +0300 |
| commit | ab234a260b1f625b26cbefa93ca365b0ae66df33 (patch) | |
| tree | 3308ecacbf6f66119fb14707eb506de1ab43e027 /arch/x86/xen/enlighten_pv.c | |
| parent | afd30525a659ac0ae0904f0cb4a2ca75522c3123 (diff) | |
| download | linux-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
Diffstat (limited to 'arch/x86/xen/enlighten_pv.c')
| -rw-r--r-- | arch/x86/xen/enlighten_pv.c | 2 |
1 files changed, 0 insertions, 2 deletions
diff --git a/arch/x86/xen/enlighten_pv.c b/arch/x86/xen/enlighten_pv.c index 6abf3f248197..dc0a337f985b 100644 --- a/arch/x86/xen/enlighten_pv.c +++ b/arch/x86/xen/enlighten_pv.c @@ -1035,8 +1035,6 @@ void __init xen_setup_vcpu_info_placement(void) */ if (xen_have_vcpu_info_placement) { pv_ops.irq.save_fl = __PV_IS_CALLEE_SAVE(xen_save_fl_direct); - pv_ops.irq.restore_fl = - __PV_IS_CALLEE_SAVE(xen_restore_fl_direct); pv_ops.irq.irq_disable = __PV_IS_CALLEE_SAVE(xen_irq_disable_direct); pv_ops.irq.irq_enable = |