diff options
| author | Scott Wood <scottwood@freescale.com> | 2014-01-10 05:18:40 +0400 |
|---|---|---|
| committer | Alexander Graf <agraf@suse.de> | 2014-01-27 19:00:55 +0400 |
| commit | 6c85f52b10fd60e45c6e30c5b85d116406bd3c9b (patch) | |
| tree | e1fc869540a04f9003c26bd6d6598a8a848b8cd0 /arch/powerpc/include/asm | |
| parent | 70713fe315ed14cd1bb07d1a7f33e973d136ae3d (diff) | |
| download | linux-6c85f52b10fd60e45c6e30c5b85d116406bd3c9b.tar.xz | |
kvm/ppc: IRQ disabling cleanup
Simplify the handling of lazy EE by going directly from fully-enabled
to hard-disabled. This replaces the lazy_irq_pending() check
(including its misplaced kvm_guest_exit() call).
As suggested by Tiejun Chen, move the interrupt disabling into
kvmppc_prepare_to_enter() rather than have each caller do it. Also
move the IRQ enabling on heavyweight exit into
kvmppc_prepare_to_enter().
Signed-off-by: Scott Wood <scottwood@freescale.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
Diffstat (limited to 'arch/powerpc/include/asm')
| -rw-r--r-- | arch/powerpc/include/asm/kvm_ppc.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/kvm_ppc.h b/arch/powerpc/include/asm/kvm_ppc.h index 629277df4798..fcd53f0d34ba 100644 --- a/arch/powerpc/include/asm/kvm_ppc.h +++ b/arch/powerpc/include/asm/kvm_ppc.h @@ -456,6 +456,12 @@ static inline void kvmppc_fix_ee_before_entry(void) trace_hardirqs_on(); #ifdef CONFIG_PPC64 + /* + * To avoid races, the caller must have gone directly from having + * interrupts fully-enabled to hard-disabled. + */ + WARN_ON(local_paca->irq_happened != PACA_IRQ_HARD_DIS); + /* Only need to enable IRQs by hard enabling them after this */ local_paca->irq_happened = 0; local_paca->soft_enabled = 1; |