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| author | Anthony PERARD <anthony.perard@citrix.com> | 2014-10-29 06:51:26 +0000 |
|---|---|---|
| committer | jljusten <jljusten@Edk2> | 2014-10-29 06:51:26 +0000 |
| commit | e86895d9e489dafe904622867b197acff6ef4355 (patch) | |
| tree | 2823308a7ebf0e7bc63ca1042c0ecd822b7a1d0d /OvmfPkg/Include/Protocol | |
| parent | 86d968e05ee062b10fe8d597b34f5eab2e2878bd (diff) | |
| download | edk2-e86895d9e489dafe904622867b197acff6ef4355.tar.gz edk2-e86895d9e489dafe904622867b197acff6ef4355.tar.bz2 edk2-e86895d9e489dafe904622867b197acff6ef4355.zip | |
OvmfPkg/XenBusDxe: Add Event Channel into XenBus protocol.
This patch adds three event channel related functions:
- EventChannelAllocate: Allocate an event channel port that can be bind
from a specified domain.
- EventChannelNotify: Send an event to the remote end of a channel.
- EventChannelClose: Close a local event channel port.
Change in V3:
- eventchannel, update protocol to return error code.
- expand patch description
- Add comments in the XenBus Protocol header.
Change in V2:
- coding style
- adding comment to functions
- Rename Xenbus to XenBus.
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@16271 6f19259b-4bc3-4df7-8a09-765794883524
Diffstat (limited to 'OvmfPkg/Include/Protocol')
| -rw-r--r-- | OvmfPkg/Include/Protocol/XenBus.h | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/OvmfPkg/Include/Protocol/XenBus.h b/OvmfPkg/Include/Protocol/XenBus.h index 8d1fb52c22..4c1247bc93 100644 --- a/OvmfPkg/Include/Protocol/XenBus.h +++ b/OvmfPkg/Include/Protocol/XenBus.h @@ -63,6 +63,7 @@ typedef enum { #include <IndustryStandard/Xen/grant_table.h>
+#include <IndustryStandard/Xen/event_channel.h>
///
/// Function prototypes
@@ -250,6 +251,54 @@ EFI_STATUS );
/**
+ Allocate a port that can be bind from domain DomainId.
+
+ @param This A pointer to the XENBUS_PROTOCOL.
+ @param DomainId The domain ID that can bind the newly allocated port.
+ @param Port A pointer to a evtchn_port_t that will contain the newly
+ allocated port.
+
+ @retval UINT32 The return value from the hypercall, 0 if success.
+**/
+typedef
+UINT32
+(EFIAPI *XENBUS_EVENT_CHANNEL_ALLOCATE) (
+ IN XENBUS_PROTOCOL *This,
+ IN domid_t DomainId,
+ OUT evtchn_port_t *Port
+ );
+
+/**
+ Send an event to the remote end of the channel whose local endpoint is Port.
+
+ @param This A pointer to the XENBUS_PROTOCOL.
+ @param Port Local port to the the event from.
+
+ @retval UINT32 The return value from the hypercall, 0 if success.
+**/
+typedef
+UINT32
+(EFIAPI *XENBUS_EVENT_CHANNEL_NOTIFY) (
+ IN XENBUS_PROTOCOL *This,
+ IN evtchn_port_t Port
+ );
+
+/**
+ Close a local event channel Port.
+
+ @param This A pointer to the XENBUS_PROTOCOL.
+ @param Port The event channel to close.
+
+ @retval UINT32 The return value from the hypercall, 0 if success.
+**/
+typedef
+UINT32
+(EFIAPI *XENBUS_EVENT_CHANNEL_CLOSE) (
+ IN XENBUS_PROTOCOL *This,
+ IN evtchn_port_t Port
+ );
+
+/**
Register a XenStore watch.
XenStore watches allow a client to wait for changes to an object in the
@@ -345,6 +394,10 @@ struct _XENBUS_PROTOCOL { XENBUS_GRANT_ACCESS GrantAccess;
XENBUS_GRANT_END_ACCESS GrantEndAccess;
+ XENBUS_EVENT_CHANNEL_ALLOCATE EventChannelAllocate;
+ XENBUS_EVENT_CHANNEL_NOTIFY EventChannelNotify;
+ XENBUS_EVENT_CHANNEL_CLOSE EventChannelClose;
+
XENBUS_REGISTER_WATCH RegisterWatch;
XENBUS_REGISTER_WATCH_BACKEND RegisterWatchBackend;
XENBUS_UNREGISTER_WATCH UnregisterWatch;
|