diff options
| -rw-r--r-- | sys/x86/x86/io_apic.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/sys/x86/x86/io_apic.c b/sys/x86/x86/io_apic.c index 8dafa96..bf12881 100644 --- a/sys/x86/x86/io_apic.c +++ b/sys/x86/x86/io_apic.c @@ -325,6 +325,18 @@ ioapic_assign_cpu(struct intsrc *isrc, u_int apic_id) u_int old_id; /* + * On Hyper-V: + * - Stick to the first cpu for all I/O APIC pins. + * - And don't allow destination cpu changes. + */ + if (vm_guest == VM_GUEST_HV) { + if (intpin->io_vector) + return (EINVAL); + else + apic_id = 0; + } + + /* * keep 1st core as the destination for NMI */ if (intpin->io_irq == IRQ_NMI) |
