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OpenCloudOS-Kernel
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KVM: Consolidate PIC isr clearing into a function 

Signed-off-by: Avi Kivity <avi@qumranet.com>
This commit is contained in:
Avi Kivity 2008-07-07 14:45:39 +03:00
parent 60bd83a125
commit 7edd0ce058
1 changed files with 12 additions and 6 deletions
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18
arch/x86/kvm/i8259.c
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@ -30,6 +30,11 @@
#include <linux/kvm_host.h>
static void pic_clear_isr(struct kvm_kpic_state *s, int irq)
{
s->isr &= ~(1 << irq);
}
/*
* set irq level. If an edge is detected, then the IRR is set to 1
*/
@ -141,11 +146,12 @@ void kvm_pic_set_irq(void *opaque, int irq, int level)
*/
static inline void pic_intack(struct kvm_kpic_state *s, int irq)
{
s->isr |= 1 << irq;
if (s->auto_eoi) {
if (s->rotate_on_auto_eoi)
s->priority_add = (irq + 1) & 7;
} else
s->isr |= (1 << irq);
pic_clear_isr(s, irq);
}
/*
* We don't clear a level sensitive interrupt here
*/
@ -243,7 +249,7 @@ static void pic_ioport_write(void *opaque, u32 addr, u32 val)
priority = get_priority(s, s->isr);
if (priority != 8) {
irq = (priority + s->priority_add) & 7;
s->isr &= ~(1 << irq);
pic_clear_isr(s, irq);
if (cmd == 5)
s->priority_add = (irq + 1) & 7;
pic_update_irq(s->pics_state);
@ -251,7 +257,7 @@ static void pic_ioport_write(void *opaque, u32 addr, u32 val)
break;
case 3:
irq = val & 7;
s->isr &= ~(1 << irq);
pic_clear_isr(s, irq);
pic_update_irq(s->pics_state);
break;
case 6:
@ -260,8 +266,8 @@ static void pic_ioport_write(void *opaque, u32 addr, u32 val)
break;
case 7:
irq = val & 7;
s->isr &= ~(1 << irq);
s->priority_add = (irq + 1) & 7;
pic_clear_isr(s, irq);
pic_update_irq(s->pics_state);
break;
default:
@ -303,7 +309,7 @@ static u32 pic_poll_read(struct kvm_kpic_state *s, u32 addr1)
s->pics_state->pics[0].irr &= ~(1 << 2);
}
s->irr &= ~(1 << ret);
s->isr &= ~(1 << ret);
pic_clear_isr(s, ret);
if (addr1 >> 7 || ret != 2)
pic_update_irq(s->pics_state);
} else {