diff options
author | David S. Miller <davem@davemloft.net> | 2009-03-28 00:19:16 (GMT) |
---|---|---|
committer | David S. Miller <davem@davemloft.net> | 2009-03-28 00:19:16 (GMT) |
commit | a83398570e17af6bb81eb94f4f5dd356bd2828d8 (patch) | |
tree | 5b5c7c3a56898485479291b7c964a1f3887d469c /arch/x86/kvm/i8259.c | |
parent | f9384d41c02408dd404aa64d66d0ef38adcf6479 (diff) | |
parent | 0b4d569de222452bcb55a4a536ade6cf4d8d1e30 (diff) | |
download | linux-fsl-qoriq-a83398570e17af6bb81eb94f4f5dd356bd2828d8.tar.xz |
Merge branch 'master' of /home/davem/src/GIT/linux-2.6/
Diffstat (limited to 'arch/x86/kvm/i8259.c')
-rw-r--r-- | arch/x86/kvm/i8259.c | 25 |
1 files changed, 18 insertions, 7 deletions
diff --git a/arch/x86/kvm/i8259.c b/arch/x86/kvm/i8259.c index 179dcb0..1ccb50c 100644 --- a/arch/x86/kvm/i8259.c +++ b/arch/x86/kvm/i8259.c @@ -32,11 +32,13 @@ #include <linux/kvm_host.h> static void pic_lock(struct kvm_pic *s) + __acquires(&s->lock) { spin_lock(&s->lock); } static void pic_unlock(struct kvm_pic *s) + __releases(&s->lock) { struct kvm *kvm = s->kvm; unsigned acks = s->pending_acks; @@ -49,7 +51,8 @@ static void pic_unlock(struct kvm_pic *s) spin_unlock(&s->lock); while (acks) { - kvm_notify_acked_irq(kvm, __ffs(acks)); + kvm_notify_acked_irq(kvm, SELECT_PIC(__ffs(acks)), + __ffs(acks)); acks &= acks - 1; } @@ -76,12 +79,13 @@ void kvm_pic_clear_isr_ack(struct kvm *kvm) /* * set irq level. If an edge is detected, then the IRR is set to 1 */ -static inline void pic_set_irq1(struct kvm_kpic_state *s, int irq, int level) +static inline int pic_set_irq1(struct kvm_kpic_state *s, int irq, int level) { - int mask; + int mask, ret = 1; mask = 1 << irq; if (s->elcr & mask) /* level triggered */ if (level) { + ret = !(s->irr & mask); s->irr |= mask; s->last_irr |= mask; } else { @@ -90,11 +94,15 @@ static inline void pic_set_irq1(struct kvm_kpic_state *s, int irq, int level) } else /* edge triggered */ if (level) { - if ((s->last_irr & mask) == 0) + if ((s->last_irr & mask) == 0) { + ret = !(s->irr & mask); s->irr |= mask; + } s->last_irr |= mask; } else s->last_irr &= ~mask; + + return (s->imr & mask) ? -1 : ret; } /* @@ -171,16 +179,19 @@ void kvm_pic_update_irq(struct kvm_pic *s) pic_unlock(s); } -void kvm_pic_set_irq(void *opaque, int irq, int level) +int kvm_pic_set_irq(void *opaque, int irq, int level) { struct kvm_pic *s = opaque; + int ret = -1; pic_lock(s); if (irq >= 0 && irq < PIC_NUM_PINS) { - pic_set_irq1(&s->pics[irq >> 3], irq & 7, level); + ret = pic_set_irq1(&s->pics[irq >> 3], irq & 7, level); pic_update_irq(s); } pic_unlock(s); + + return ret; } /* @@ -232,7 +243,7 @@ int kvm_pic_read_irq(struct kvm *kvm) } pic_update_irq(s); pic_unlock(s); - kvm_notify_acked_irq(kvm, irq); + kvm_notify_acked_irq(kvm, SELECT_PIC(irq), irq); return intno; } |