diff options
Diffstat (limited to 'sys/amd64/include/intr_machdep.h')
| -rw-r--r-- | sys/amd64/include/intr_machdep.h | 18 |
1 files changed, 15 insertions, 3 deletions
diff --git a/sys/amd64/include/intr_machdep.h b/sys/amd64/include/intr_machdep.h index 8671605..c8b454d 100644 --- a/sys/amd64/include/intr_machdep.h +++ b/sys/amd64/include/intr_machdep.h @@ -44,12 +44,24 @@ * allocate IDT vectors. * * The first 255 IRQs (0 - 254) are reserved for ISA IRQs and PCI intline IRQs. - * IRQ values beyond 256 are used by MSI. We leave 255 unused to avoid - * confusion since 255 is used in PCI to indicate an invalid IRQ. + * IRQ values from 256 to 767 are used by MSI. When running under the Xen + * Hypervisor, IRQ values from 768 to 4863 are available for binding to + * event channel events. We leave 255 unused to avoid confusion since 255 is + * used in PCI to indicate an invalid IRQ. */ #define NUM_MSI_INTS 512 #define FIRST_MSI_INT 256 -#define NUM_IO_INTS (FIRST_MSI_INT + NUM_MSI_INTS) +#ifdef XENHVM +#include <xen/xen-os.h> +#define NUM_EVTCHN_INTS NR_EVENT_CHANNELS +#define FIRST_EVTCHN_INT \ + (FIRST_MSI_INT + NUM_MSI_INTS) +#define LAST_EVTCHN_INT \ + (FIRST_EVTCHN_INT + NUM_EVTCHN_INTS - 1) +#else +#define NUM_EVTCHN_INTS 0 +#endif +#define NUM_IO_INTS (FIRST_MSI_INT + NUM_MSI_INTS + NUM_EVTCHN_INTS) /* * Default base address for MSI messages on x86 platforms. |
