Thread (46 messages) 46 messages, 10 authors, 2016-04-01
STALE3711d REVIEWED: 1 (0M)
Revisions (2)
  1. v7 current
  2. v10 [diff vs current]

[PATCH v7 09/17] xen/hvm/params: Add a new delivery type for event-channel in HVM_PARAM_CALLBACK_IRQ

From: Shannon Zhao <hidden>
Date: 2016-03-24 14:47:45
Also in: linux-devicetree, linux-efi, lkml
Subsystem: the rest, xen hypervisor interface · Maintainers: Linus Torvalds, Juergen Gross, Stefano Stabellini

This new delivery type which is for ARM shares the same value with
HVM_PARAM_CALLBACK_TYPE_VECTOR which is for x86.

val[15:8] is flag: val[7:0] is a PPI.
To the flag, bit 8 stands the interrupt mode is edge(1) or level(0) and
bit 9 stands the interrupt polarity is active low(1) or high(0).

Signed-off-by: Shannon Zhao <redacted>
Acked-by: Stefano Stabellini <redacted>
---
 include/xen/interface/hvm/params.h | 13 +++++++++++++
 1 file changed, 13 insertions(+)
diff --git a/include/xen/interface/hvm/params.h b/include/xen/interface/hvm/params.h
index 70ad208..4d61fc5 100644
--- a/include/xen/interface/hvm/params.h
+++ b/include/xen/interface/hvm/params.h
@@ -47,11 +47,24 @@
  * 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
-- 
2.1.4
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