This protocol will be used for communication between a PV driver (like a
PV block driver) and the Xenbus/Xenstore.
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Anthony PERARD <anthony.per...@citrix.com>
---
OvmfPkg/Include/Protocol/Xenbus.h | 62 +++++++++++++++++++++++++++++++++++++++
OvmfPkg/OvmfPkg.dec | 2 ++
OvmfPkg/XenbusDxe/ComponentName.c | 12 ++++++++
OvmfPkg/XenbusDxe/XenbusDxe.h | 3 ++
OvmfPkg/XenbusDxe/XenbusDxe.inf | 1 +
5 files changed, 80 insertions(+)
create mode 100644 OvmfPkg/Include/Protocol/Xenbus.h
diff --git a/OvmfPkg/Include/Protocol/Xenbus.h
b/OvmfPkg/Include/Protocol/Xenbus.h
new file mode 100644
index 0000000..191cee1
--- /dev/null
+++ b/OvmfPkg/Include/Protocol/Xenbus.h
@@ -0,0 +1,62 @@
+
+/** @file
+ TODO: Brief Description of Protocol Xenbus
+
+ TODO: Detailed Description of Protocol Xenbus
+
+ TODO: Copyright for Protocol Xenbus
+
+ TODO: License for Protocol Xenbus
+
+**/
+
+#ifndef __PROTOCOL_XENBUS_H__
+#define __PROTOCOL_XENBUS_H__
+
+#define XENBUS_PROTOCOL_GUID \
+ {0x3d3ca290, 0xb9a5, 0x11e3, {0xb7, 0x5d, 0xb8, 0xac, 0x6f, 0x7d, 0x65,
0xe6}}
+
+///
+/// Forward declaration
+///
+typedef struct _XENBUS_PROTOCOL XENBUS_PROTOCOL;
+
+
+#include <IndustryStandard/Xen/grant_table.h>
+
+///
+/// Function prototypes
+///
+
+typedef
+EFI_STATUS
+(EFIAPI *XENBUS_GRANT_ACCESS)(
+ IN XENBUS_PROTOCOL *This,
+ IN domid_t DomainId,
+ IN UINTN Frame,
+ IN BOOLEAN ReadOnly,
+ OUT grant_ref_t *refp
+ );
+
+typedef
+EFI_STATUS
+(EFIAPI *XENBUS_GRANT_END_ACCESS)(
+ IN XENBUS_PROTOCOL *This,
+ IN grant_ref_t Ref
+ );
+
+
+///
+/// Protocol structure
+///
+struct _XENBUS_PROTOCOL {
+ XENBUS_GRANT_ACCESS GrantAccess;
+ XENBUS_GRANT_END_ACCESS GrantEndAccess;
+ //
+ // Place protocol data fields here
+ //
+};
+
+extern EFI_GUID gXenbusProtocolGuid;
+
+#endif
diff --git a/OvmfPkg/OvmfPkg.dec b/OvmfPkg/OvmfPkg.dec
index f829247..095d40a 100644
--- a/OvmfPkg/OvmfPkg.dec
+++ b/OvmfPkg/OvmfPkg.dec
@@ -47,6 +47,8 @@
[Protocols]
gVirtioDeviceProtocolGuid = {0xfa920010, 0x6785, 0x4941, {0xb6, 0xec,
0x49, 0x8c, 0x57, 0x9f, 0x16, 0x0a}}
gBlockMmioProtocolGuid = {0x6b558ce3, 0x69e5, 0x4c67, {0xa6, 0x34,
0xf7, 0xfe, 0x72, 0xad, 0xbe, 0x84}}
+ ## Include/Protocol/Xenbus.h
+ gXenbusProtocolGuid = {0x3d3ca290, 0xb9a5, 0x11e3, {0xb7, 0x5d, 0xb8, 0xac,
0x6f, 0x7d, 0x65, 0xe6}}
[PcdsFixedAtBuild]
gUefiOvmfPkgTokenSpaceGuid.PcdOvmfPeiMemFvBase|0x0|UINT32|0
diff --git a/OvmfPkg/XenbusDxe/ComponentName.c
b/OvmfPkg/XenbusDxe/ComponentName.c
index 2cf11b5..fd46cc8 100644
--- a/OvmfPkg/XenbusDxe/ComponentName.c
+++ b/OvmfPkg/XenbusDxe/ComponentName.c
@@ -140,6 +140,18 @@ XenbusDxeComponentNameGetControllerName (
}
//
+ // Make sure this driver is currently managing ControllerHandle
+ //
+ Status = EfiTestManagedDevice (
+ ControllerHandle,
+ gXenbusDxeDriverBinding.DriverBindingHandle,
+ &gXenbusProtocolGuid
+ );
+ if (EFI_ERROR (Status)) {
+ return Status;
+ }
+
+ //
// Lookup name of controller specified by ControllerHandle
//
Status = EFI_UNSUPPORTED;
diff --git a/OvmfPkg/XenbusDxe/XenbusDxe.h b/OvmfPkg/XenbusDxe/XenbusDxe.h
index d57e3c8..975fb6b 100644
--- a/OvmfPkg/XenbusDxe/XenbusDxe.h
+++ b/OvmfPkg/XenbusDxe/XenbusDxe.h
@@ -42,6 +42,9 @@
//
// Produced Protocols
//
+// Xen interface version used:
+#define __XEN_INTERFACE_VERSION__ 0x00040400
+#include <Protocol/Xenbus.h>
//
diff --git a/OvmfPkg/XenbusDxe/XenbusDxe.inf b/OvmfPkg/XenbusDxe/XenbusDxe.inf
index 8b69f93..1a6b131 100644
--- a/OvmfPkg/XenbusDxe/XenbusDxe.inf
+++ b/OvmfPkg/XenbusDxe/XenbusDxe.inf
@@ -55,6 +55,7 @@
gEfiPciIoProtocolGuid
gEfiComponentName2ProtocolGuid
gEfiComponentNameProtocolGuid
+ gXenbusProtocolGuid
[Guids]
--
Anthony PERARD
------------------------------------------------------------------------------
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