[Xen-devel] [PATCH v6 05/18] vmx: Extend struct pi_desc to support VT-d Posted-Interrupts

[Feng Wu <feng.wu@xxxxxxxxx>]

Extend struct pi_desc according to VT-d Posted-Interrupts Spec.

CC: Kevin Tian <kevin.tian@xxxxxxxxx>
CC: Keir Fraser <keir@xxxxxxx>
CC: Jan Beulich <jbeulich@xxxxxxxx>
CC: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
Signed-off-by: Feng Wu <feng.wu@xxxxxxxxx>
Reviewed-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
Acked-by: Kevin Tian <kevin.tian@xxxxxxxxx>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
---
v3:
- Use u32 instead of u64 for the bitfield in 'struct pi_desc'

 xen/include/asm-x86/hvm/vmx/vmcs.h | 15 +++++++++++++--
 1 file changed, 13 insertions(+), 2 deletions(-)

diff --git a/xen/include/asm-x86/hvm/vmx/vmcs.h 
b/xen/include/asm-x86/hvm/vmx/vmcs.h
index f1126d4..7e81752 100644
--- a/xen/include/asm-x86/hvm/vmx/vmcs.h
+++ b/xen/include/asm-x86/hvm/vmx/vmcs.h
@@ -80,8 +80,19 @@ struct vmx_domain {
 
 struct pi_desc {
     DECLARE_BITMAP(pir, NR_VECTORS);
-    u32 control;
-    u32 rsvd[7];
+    union {
+        struct
+        {
+        u16 on     : 1,  /* bit 256 - Outstanding Notification */
+            sn     : 1,  /* bit 257 - Suppress Notification */
+            rsvd_1 : 14; /* bit 271:258 - Reserved */
+        u8  nv;          /* bit 279:272 - Notification Vector */
+        u8  rsvd_2;      /* bit 287:280 - Reserved */
+        u32 ndst;        /* bit 319:288 - Notification Destination */
+        };
+        u64 control;
+    };
+    u32 rsvd[6];
 } __attribute__ ((aligned (64)));
 
 #define ept_get_wl(ept)   ((ept)->ept_wl)
-- 
2.1.0


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