Fix a bug where MSI interrupts on x86 were always routed to APIC ID 0…

… rather

than the APIC ID of the boot CPU prior to SI_SUB_SMP.  This resulted in
some storage controllers not being able to enumerate attached devices when
using MSI/MSI-X interrupts.  This only affects <= 7.x, so it is a direct
commit to 7.3 rather than an MFC.

Approved by:	re (kib)

sys/amd64/amd64/msi.c

@@ -321,6 +321,7 @@ msi_alloc(device_t dev, int count, int maxcount, int *irqs)
 	for (i = 0; i < count; i++) {
 		msi = (struct msi_intsrc *)intr_lookup_source(irqs[i]);
 		msi->msi_dev = dev;
+		msi->msi_cpu = PCPU_GET(apic_id);
 		msi->msi_vector = vector + i;
 		if (bootverbose)
 			printf("msi: routing MSI IRQ %d to vector %u\n",
@@ -477,6 +478,7 @@ msix_alloc(device_t dev, int *irq)
 	/* Setup source. */
 	msi->msi_dev = dev;
 	msi->msi_vector = vector;
+	msi->msi_cpu = PCPU_GET(apic_id);
 	msi->msi_msix = 1;
 
 	KASSERT(msi->msi_intsrc.is_handlers == 0, ("dead MSI-X has handlers"));

sys/i386/i386/msi.c

@@ -321,6 +321,7 @@ msi_alloc(device_t dev, int count, int maxcount, int *irqs)
 	for (i = 0; i < count; i++) {
 		msi = (struct msi_intsrc *)intr_lookup_source(irqs[i]);
 		msi->msi_dev = dev;
+		msi->msi_cpu = PCPU_GET(apic_id);
 		msi->msi_vector = vector + i;
 		if (bootverbose)
 			printf("msi: routing MSI IRQ %d to vector %u\n",
@@ -477,6 +478,7 @@ msix_alloc(device_t dev, int *irq)
 	/* Setup source. */
 	msi->msi_dev = dev;
 	msi->msi_vector = vector;
+	msi->msi_cpu = PCPU_GET(apic_id);
 	msi->msi_msix = 1;
 
 	KASSERT(msi->msi_intsrc.is_handlers == 0, ("dead MSI-X has handlers"));