Implement a PCI interrupt router to route PCI legacy INTx interrupts to

the legacy 8259A PICs.
- Implement an ICH-comptabile PCI interrupt router on the lpc device with
  8 steerable pins configured via config space access to byte-wide
  registers at 0x60-63 and 0x68-6b.
- For each configured PCI INTx interrupt, route it to both an I/O APIC
  pin and a PCI interrupt router pin.  When a PCI INTx interrupt is
  asserted, ensure that both pins are asserted.
- Provide an initial routing of PCI interrupt router (PIRQ) pins to
  8259A pins (ISA IRQs) and initialize the interrupt line config register
  for the corresponding PCI function with the ISA IRQ as this matches
  existing hardware.
- Add a global _PIC method for OSPM to select the desired interrupt routing
  configuration.
- Update the _PRT methods for PCI bridges to provide both APIC and legacy
  PRT tables and return the appropriate table based on the configured
  routing configuration.  Note that if the lpc device is not configured, no
  routing information is provided.
- When the lpc device is enabled, provide ACPI PCI link devices corresponding
  to each PIRQ pin.
- Add a VMM ioctl to adjust the trigger mode (edge vs level) for 8259A
  pins via the ELCR.
- Mark the power management SCI as level triggered.
- Don't hardcode the number of elements in Packages in the source for
  the DSDT.  iasl(8) will fill in the actual number of elements, and
  this makes it simpler to generate a Package with a variable number of
  elements.

Reviewed by:	tycho

2 files changed, 16 insertions, 0 deletions

diff --git a/lib/libvmmapi/vmmapi.c b/lib/libvmmapi/vmmapi.c
index b853ae7..5e630f8 100644
--- a/lib/libvmmapi/vmmapi.c
+++ b/lib/libvmmapi/vmmapi.c
@@ -507,6 +507,7 @@ int
 vm_isa_pulse_irq(struct vmctx *ctx, int atpic_irq, int ioapic_irq)
 {
 	struct vm_isa_irq isa_irq;
+
 	bzero(&isa_irq, sizeof(struct vm_isa_irq));
 	isa_irq.atpic_irq = atpic_irq;
 	isa_irq.ioapic_irq = ioapic_irq;
@@ -515,6 +516,19 @@ vm_isa_pulse_irq(struct vmctx *ctx, int atpic_irq, int ioapic_irq)
 }
 
 int
+vm_isa_set_irq_trigger(struct vmctx *ctx, int atpic_irq,
+    enum vm_intr_trigger trigger)
+{
+	struct vm_isa_irq_trigger isa_irq_trigger;
+
+	bzero(&isa_irq_trigger, sizeof(struct vm_isa_irq_trigger));
+	isa_irq_trigger.atpic_irq = atpic_irq;
+	isa_irq_trigger.trigger = trigger;
+
+	return (ioctl(ctx->fd, VM_ISA_SET_IRQ_TRIGGER, &isa_irq_trigger));
+}
+
+int
 vm_inject_nmi(struct vmctx *ctx, int vcpu)
 {
 	struct vm_nmi vmnmi;
diff --git a/lib/libvmmapi/vmmapi.h b/lib/libvmmapi/vmmapi.h
index c1a4b35..88e9947 100644
--- a/lib/libvmmapi/vmmapi.h
+++ b/lib/libvmmapi/vmmapi.h
@@ -78,6 +78,8 @@ int	vm_ioapic_pincount(struct vmctx *ctx, int *pincount);
 int	vm_isa_assert_irq(struct vmctx *ctx, int atpic_irq, int ioapic_irq);
 int	vm_isa_deassert_irq(struct vmctx *ctx, int atpic_irq, int ioapic_irq);
 int	vm_isa_pulse_irq(struct vmctx *ctx, int atpic_irq, int ioapic_irq);
+int	vm_isa_set_irq_trigger(struct vmctx *ctx, int atpic_irq,
+	    enum vm_intr_trigger trigger);
 int	vm_inject_nmi(struct vmctx *ctx, int vcpu);
 int	vm_capability_name2type(const char *capname);
 const char *vm_capability_type2name(int type);