The ExitBoot event is used to disconnect from the device before the
next operating system start using them.
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Anthony PERARD <anthony.per...@citrix.com>
---
OvmfPkg/XenbusDxe/XenbusDxe.c | 39 ++++++++++++++++++++++++++++++++++++---
OvmfPkg/XenbusDxe/XenbusDxe.h | 10 ++++++++++
2 files changed, 46 insertions(+), 3 deletions(-)
diff --git a/OvmfPkg/XenbusDxe/XenbusDxe.c b/OvmfPkg/XenbusDxe/XenbusDxe.c
index 14113ad..2c3d9b8 100644
--- a/OvmfPkg/XenbusDxe/XenbusDxe.c
+++ b/OvmfPkg/XenbusDxe/XenbusDxe.c
@@ -16,7 +16,6 @@
#include "XenbusDxe.h"
-
///
/// Driver Binding Protocol instance
///
@@ -30,6 +29,8 @@ EFI_DRIVER_BINDING_PROTOCOL gXenbusDxeDriverBinding = {
};
+XENBUS_DEVICE *mMyDevice;
+
/**
Unloads an image.
@@ -229,6 +230,19 @@ XenbusDxeDriverBindingSupported (
return Status;
}
+VOID
+EFIAPI
+NotifyExitBoot (
+ IN EFI_EVENT Event,
+ IN VOID *Context
+ )
+{
+ XENBUS_DEVICE *Dev = Context;
+
+ gBS->DisconnectController(Dev->ControllerHandle,
+ Dev->This->DriverBindingHandle, NULL);
+}
+
/**
Starts a device controller or a bus controller.
@@ -272,7 +286,22 @@ XenbusDxeDriverBindingStart (
IN EFI_DEVICE_PATH_PROTOCOL *RemainingDevicePath OPTIONAL
)
{
- return EFI_UNSUPPORTED;
+ EFI_STATUS Status;
+ XENBUS_DEVICE *Dev;
+
+ Dev = AllocateZeroPool (sizeof (*Dev));
+ Dev->Signature = XENBUS_DEVICE_SIGNATURE;
+ Dev->This = This;
+ Dev->ControllerHandle = ControllerHandle;
+
+ Status = gBS->CreateEvent (EVT_SIGNAL_EXIT_BOOT_SERVICES, TPL_CALLBACK,
+ NotifyExitBoot,
+ (VOID*) Dev,
+ &Dev->ExitBootEvent);
+ ASSERT_EFI_ERROR (Status);
+
+ mMyDevice = Dev;
+ return EFI_SUCCESS;
}
/**
@@ -310,5 +339,9 @@ XenbusDxeDriverBindingStop (
IN EFI_HANDLE *ChildHandleBuffer OPTIONAL
)
{
- return EFI_UNSUPPORTED;
+ XENBUS_DEVICE *Dev = mMyDevice;
+
+ gBS->CloseEvent (Dev->ExitBootEvent);
+
+ return EFI_SUCCESS;
}
diff --git a/OvmfPkg/XenbusDxe/XenbusDxe.h b/OvmfPkg/XenbusDxe/XenbusDxe.h
index 6f22732..c1ca87a 100644
--- a/OvmfPkg/XenbusDxe/XenbusDxe.h
+++ b/OvmfPkg/XenbusDxe/XenbusDxe.h
@@ -75,4 +75,14 @@ extern EFI_COMPONENT_NAME_PROTOCOL gXenbusDxeComponentName;
#define PCI_DEVICE_ID_XEN_PLATFORM 0x0001
+typedef struct _XENBUS_DEVICE XENBUS_DEVICE;
+
+#define XENBUS_DEVICE_SIGNATURE SIGNATURE_32 ('X','B','b','d')
+struct _XENBUS_DEVICE {
+ UINT32 Signature;
+ EFI_DRIVER_BINDING_PROTOCOL *This;
+ EFI_HANDLE ControllerHandle;
+ EFI_EVENT ExitBootEvent;
+};
+
#endif
--
Anthony PERARD
------------------------------------------------------------------------------
Want fast and easy access to all the code in your enterprise? Index and
search up to 200,000 lines of code with a free copy of Black Duck
Code Sight - the same software that powers the world's largest code
search on Ohloh, the Black Duck Open Hub! Try it now.
http://p.sf.net/sfu/bds
_______________________________________________
edk2-devel mailing list
edk2-devel@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/edk2-devel
