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| author | Tiejun Chen <tiejun.chen@windriver.com> | 2013-10-23 09:26:48 +0800 |
|---|---|---|
| committer | Alexander Graf <agraf@suse.de> | 2014-01-09 10:15:10 +0100 |
| commit | 9bd880a2c882d2181b1eaba0aed422cced8f0e8a (patch) | |
| tree | 04d627755115ed0d56e2538f0c7436dd0fff60c3 /arch/powerpc/kvm/bookehv_interrupts.S | |
| parent | 08c9a188d0d0fc0f0c5e17d89a06bb59c493110f (diff) | |
| download | lwn-9bd880a2c882d2181b1eaba0aed422cced8f0e8a.tar.gz lwn-9bd880a2c882d2181b1eaba0aed422cced8f0e8a.zip | |
KVM: PPC: Book3E HV: call RECONCILE_IRQ_STATE to sync the software state
Rather than calling hard_irq_disable() when we're back in C code
we can just call RECONCILE_IRQ_STATE to soft disable IRQs while
we're already in hard disabled state.
This should be functionally equivalent to the code before, but
cleaner and faster.
Signed-off-by: Tiejun Chen <tiejun.chen@windriver.com>
[agraf: fix comment, commit message]
Signed-off-by: Alexander Graf <agraf@suse.de>
Diffstat (limited to 'arch/powerpc/kvm/bookehv_interrupts.S')
| -rw-r--r-- | arch/powerpc/kvm/bookehv_interrupts.S | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/arch/powerpc/kvm/bookehv_interrupts.S b/arch/powerpc/kvm/bookehv_interrupts.S index e8ed7d659c55..be3de1dd7bb3 100644 --- a/arch/powerpc/kvm/bookehv_interrupts.S +++ b/arch/powerpc/kvm/bookehv_interrupts.S @@ -33,6 +33,8 @@ #ifdef CONFIG_64BIT #include <asm/exception-64e.h> +#include <asm/hw_irq.h> +#include <asm/irqflags.h> #else #include "../kernel/head_booke.h" /* for THREAD_NORMSAVE() */ #endif @@ -465,6 +467,15 @@ _GLOBAL(kvmppc_resume_host) mtspr SPRN_EPCR, r3 isync +#ifdef CONFIG_64BIT + /* + * We enter with interrupts disabled in hardware, but + * we need to call RECONCILE_IRQ_STATE to ensure + * that the software state is kept in sync. + */ + RECONCILE_IRQ_STATE(r3,r5) +#endif + /* Switch to kernel stack and jump to handler. */ PPC_LL r3, HOST_RUN(r1) mr r5, r14 /* intno */ |