MSI-x interrupt support for PCI pass-thru devices.

Includes instruction emulation for memory r/w access. This
opens the door for io-apic, local apic, hpet timer, and
legacy device emulation.

Submitted by:	ryan dot berryhill at sandvine dot com
Reviewed by:	grehan
Obtained from:	Sandvine

2 files changed, 21 insertions, 0 deletions

diff --git a/lib/libvmmapi/vmmapi.c b/lib/libvmmapi/vmmapi.c
index 17f2063..a33a94e 100644
--- a/lib/libvmmapi/vmmapi.c
+++ b/lib/libvmmapi/vmmapi.c
@@ -454,6 +454,25 @@ vm_setup_msi(struct vmctx *ctx, int vcpu, int bus, int slot, int func,
 	return (ioctl(ctx->fd, VM_PPTDEV_MSI, &pptmsi));
 }
 
+int	
+vm_setup_msix(struct vmctx *ctx, int vcpu, int bus, int slot, int func,
+	      int idx, uint32_t msg, uint32_t vector_control, uint64_t addr)
+{
+	struct vm_pptdev_msix pptmsix;
+
+	bzero(&pptmsix, sizeof(pptmsix));
+	pptmsix.vcpu = vcpu;
+	pptmsix.bus = bus;
+	pptmsix.slot = slot;
+	pptmsix.func = func;
+	pptmsix.idx = idx;
+	pptmsix.msg = msg;
+	pptmsix.addr = addr;
+	pptmsix.vector_control = vector_control;
+
+	return ioctl(ctx->fd, VM_PPTDEV_MSIX, &pptmsix);
+}
+
 uint64_t *
 vm_get_stats(struct vmctx *ctx, int vcpu, struct timeval *ret_tv,
 	     int *ret_entries)
diff --git a/lib/libvmmapi/vmmapi.h b/lib/libvmmapi/vmmapi.h
index 38533a8..7b66421 100644
--- a/lib/libvmmapi/vmmapi.h
+++ b/lib/libvmmapi/vmmapi.h
@@ -77,6 +77,8 @@ int	vm_map_pptdev_mmio(struct vmctx *ctx, int bus, int slot, int func,
 			   vm_paddr_t gpa, size_t len, vm_paddr_t hpa);
 int	vm_setup_msi(struct vmctx *ctx, int vcpu, int bus, int slot, int func,
 		     int dest, int vector, int numvec);
+int	vm_setup_msix(struct vmctx *ctx, int vcpu, int bus, int slot, int func,
+		      int idx, uint32_t msg, uint32_t vector_control, uint64_t addr);
 
 /*
  * Return a pointer to the statistics buffer. Note that this is not MT-safe.