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 | 38 ++++++++++++++++++++++++++++++++++++--
OvmfPkg/XenBusDxe/XenBusDxe.h | 11 +++++++++++
2 files changed, 47 insertions(+), 2 deletions(-)
diff --git a/OvmfPkg/XenBusDxe/XenBusDxe.c b/OvmfPkg/XenBusDxe/XenBusDxe.c
index a272204..e125ed7 100644
--- a/OvmfPkg/XenBusDxe/XenBusDxe.c
+++ b/OvmfPkg/XenBusDxe/XenBusDxe.c
@@ -59,6 +59,8 @@ EFI_DRIVER_BINDING_PROTOCOL gXenBusDxeDriverBinding = {
};
+XENBUS_DEVICE *mMyDevice;
+
/**
Unloads an image.
@@ -232,6 +234,19 @@ 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 bus controller.
@@ -275,7 +290,22 @@ 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;
}
/**
@@ -313,5 +343,9 @@ 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 4c11f60..9e4860a 100644
--- a/OvmfPkg/XenBusDxe/XenBusDxe.h
+++ b/OvmfPkg/XenBusDxe/XenBusDxe.h
@@ -90,4 +90,15 @@ extern EFI_COMPONENT_NAME_PROTOCOL gXenBusDxeComponentName;
#define PCI_DEVICE_ID_XEN_PLATFORM 0x0001
+typedef struct _XENBUS_DEVICE XENBUS_DEVICE;
+
+// Have the state of the driver.
+#define XENBUS_DEVICE_SIGNATURE SIGNATURE_32 ('X','B','s','t')
+struct _XENBUS_DEVICE {
+ UINT32 Signature;
+ EFI_DRIVER_BINDING_PROTOCOL *This;
+ EFI_HANDLE ControllerHandle;
+ EFI_EVENT ExitBootEvent;
+};
+
#endif
--
Anthony PERARD
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