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-rw-r--r--include/xen/interface/physdev.h10
1 files changed, 8 insertions, 2 deletions
diff --git a/include/xen/interface/physdev.h b/include/xen/interface/physdev.h
index 42721d13a10..610dba9b620 100644
--- a/include/xen/interface/physdev.h
+++ b/include/xen/interface/physdev.h
@@ -131,6 +131,7 @@ struct physdev_irq {
#define MAP_PIRQ_TYPE_GSI 0x1
#define MAP_PIRQ_TYPE_UNKNOWN 0x2
#define MAP_PIRQ_TYPE_MSI_SEG 0x3
+#define MAP_PIRQ_TYPE_MULTI_MSI 0x4
#define PHYSDEVOP_map_pirq 13
struct physdev_map_pirq {
@@ -141,11 +142,16 @@ struct physdev_map_pirq {
int index;
/* IN or OUT */
int pirq;
- /* IN - high 16 bits hold segment for MAP_PIRQ_TYPE_MSI_SEG */
+ /* IN - high 16 bits hold segment for ..._MSI_SEG and ..._MULTI_MSI */
int bus;
/* IN */
int devfn;
- /* IN */
+ /* IN
+ * - For MSI-X contains entry number.
+ * - For MSI with ..._MULTI_MSI contains number of vectors.
+ * OUT (..._MULTI_MSI only)
+ * - Number of vectors allocated.
+ */
int entry_nr;
/* IN */
uint64_t table_base;