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x86: rewrite gsi_handler() 

Rewrite function to use switch() for IRQ number mapping.
Check i8259_irq exists before raising it so the function
also works in case no i8259 (aka pic) is present.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Message-id: 20201203105423.10431-3-kraxel@redhat.com
This commit is contained in:
Gerd Hoffmann 2020-12-03 11:54:13 +01:00
parent 5e7b204dbf
commit ceea95cd88
1 changed files with 10 additions and 4 deletions
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14
hw/i386/x86.c
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@ -588,11 +588,17 @@ void gsi_handler(void *opaque, int n, int level)
GSIState *s = opaque;
trace_x86_gsi_interrupt(n, level);
if (n < ISA_NUM_IRQS) {
/* Under KVM, Kernel will forward to both PIC and IOAPIC */
qemu_set_irq(s->i8259_irq[n], level);
switch (n) {
case 0 ... ISA_NUM_IRQS - 1:
if (s->i8259_irq[n]) {
/* Under KVM, Kernel will forward to both PIC and IOAPIC */
qemu_set_irq(s->i8259_irq[n], level);
}
/* fall through */
case ISA_NUM_IRQS ... IOAPIC_NUM_PINS - 1:
qemu_set_irq(s->ioapic_irq[n], level);
break;
}
qemu_set_irq(s->ioapic_irq[n], level);
}
void ioapic_init_gsi(GSIState *gsi_state, const char *parent_name)