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-rw-r--r--include/xen/interface/hvm/params.h40
1 files changed, 34 insertions, 6 deletions
diff --git a/include/xen/interface/hvm/params.h b/include/xen/interface/hvm/params.h
index a6c79911e..4d61fc58d 100644
--- a/include/xen/interface/hvm/params.h
+++ b/include/xen/interface/hvm/params.h
@@ -27,16 +27,44 @@
* Parameter space for HVMOP_{set,get}_param.
*/
+#define HVM_PARAM_CALLBACK_IRQ 0
/*
* How should CPU0 event-channel notifications be delivered?
- * val[63:56] == 0: val[55:0] is a delivery GSI (Global System Interrupt).
- * val[63:56] == 1: val[55:0] is a delivery PCI INTx line, as follows:
- * Domain = val[47:32], Bus = val[31:16],
- * DevFn = val[15: 8], IntX = val[ 1: 0]
- * val[63:56] == 2: val[7:0] is a vector number.
+ *
* If val == 0 then CPU0 event-channel notifications are not delivered.
+ * If val != 0, val[63:56] encodes the type, as follows:
*/
-#define HVM_PARAM_CALLBACK_IRQ 0
+
+#define HVM_PARAM_CALLBACK_TYPE_GSI 0
+/*
+ * val[55:0] is a delivery GSI. GSI 0 cannot be used, as it aliases val == 0,
+ * and disables all notifications.
+ */
+
+#define HVM_PARAM_CALLBACK_TYPE_PCI_INTX 1
+/*
+ * val[55:0] is a delivery PCI INTx line:
+ * Domain = val[47:32], Bus = val[31:16] DevFn = val[15:8], IntX = val[1:0]
+ */
+
+#if defined(__i386__) || defined(__x86_64__)
+#define HVM_PARAM_CALLBACK_TYPE_VECTOR 2
+/*
+ * val[7:0] is a vector number. Check for XENFEAT_hvm_callback_vector to know
+ * if this delivery method is available.
+ */
+#elif defined(__arm__) || defined(__aarch64__)
+#define HVM_PARAM_CALLBACK_TYPE_PPI 2
+/*
+ * val[55:16] needs to be zero.
+ * val[15:8] is interrupt flag of the PPI used by event-channel:
+ * bit 8: the PPI is edge(1) or level(0) triggered
+ * bit 9: the PPI is active low(1) or high(0)
+ * val[7:0] is a PPI number used by event-channel.
+ * This is only used by ARM/ARM64 and masking/eoi the interrupt associated to
+ * the notification is handled by the interrupt controller.
+ */
+#endif
#define HVM_PARAM_STORE_PFN 1
#define HVM_PARAM_STORE_EVTCHN 2