| Message ID | 20201105133923.23821-3-kraxel@redhat.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | microvm: add second ioapic | expand |
On Thu, 5 Nov 2020 14:39:13 +0100 Gerd Hoffmann <kraxel@redhat.com> wrote: > 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> > --- > hw/i386/x86.c | 14 ++++++++++---- > 1 file changed, 10 insertions(+), 4 deletions(-) > > diff --git a/hw/i386/x86.c b/hw/i386/x86.c > index 5944fc44edca..b67e7b789f89 100644 > --- a/hw/i386/x86.c > +++ b/hw/i386/x86.c > @@ -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)
diff --git a/hw/i386/x86.c b/hw/i386/x86.c index 5944fc44edca..b67e7b789f89 100644 --- a/hw/i386/x86.c +++ b/hw/i386/x86.c @@ -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)
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> --- hw/i386/x86.c | 14 ++++++++++---- 1 file changed, 10 insertions(+), 4 deletions(-)