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ArmVirtualizationPkg: add XenIoMmioLib 

This adds a XenIoMmioLib declaration and implementation that can
be invoked to install the XENIO_PROTOCOL and a corresponding
grant table address on a EFI handle.

Contributed-under: TianoCore Contribution Agreement 1.0
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Laszlo Ersek <lersek@redhat.com>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@16979 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
Ard Biesheuvel 2015-02-28 20:34:16 +00:00 committed by lersek
parent b0022ab871
commit 0169352eaa
4 changed files with 273 additions and 0 deletions
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64
OvmfPkg/Include/Library/XenIoMmioLib.h Normal file
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/** @file
* Manage XenBus device path and I/O handles
*
* Copyright (c) 2015, Linaro Ltd. All rights reserved.<BR>
*
* This program and the accompanying materials are
* licensed and made available under the terms and conditions of the BSD License
* which accompanies this distribution. The full text of the license may be found at
* http://opensource.org/licenses/bsd-license.php
*
* THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
* WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
*
**/
#ifndef _XENIO_MMIO_DEVICE_LIB_H_
#define _XENIO_MMIO_DEVICE_LIB_H_
/**
Install the XENBUS_ROOT_DEVICE_PATH and XENIO_PROTOCOL protocols on
the handle pointed to by @Handle, or on a new handle if it points to
NULL
@param Handle Pointer to the handle to install the protocols
on, may point to a NULL handle.
@param GrantTableAddress The address of the Xen grant table
@retval EFI_SUCCESS Protocols were installed successfully
@retval EFI_OUT_OF_RESOURCES The function failed to allocate memory required
by the XenIo MMIO and device path protocols
@return Status code returned by the boot service
InstallMultipleProtocolInterfaces ()
**/
EFI_STATUS
XenIoMmioInstall (
IN OUT EFI_HANDLE *Handle,
IN EFI_PHYSICAL_ADDRESS GrantTableAddress
);
/**
Uninstall the XENBUS_ROOT_DEVICE_PATH and XENIO_PROTOCOL protocols
@param Handle Handle onto which the protocols have been installed
earlier by XenIoMmioInstall ()
@retval EFI_SUCCESS Protocols were uninstalled successfully
@return Status code returned by the boot service
UninstallMultipleProtocolInterfaces ()
**/
EFI_STATUS
XenIoMmioUninstall (
IN EFI_HANDLE Handle
);
#endif

166
OvmfPkg/Library/XenIoMmioLib/XenIoMmioLib.c Normal file
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/** @file
* Manage XenBus device path and I/O handles
*
* Copyright (c) 2015, Linaro Ltd. All rights reserved.<BR>
*
* This program and the accompanying materials are
* licensed and made available under the terms and conditions of the BSD License
* which accompanies this distribution. The full text of the license may be found at
* http://opensource.org/licenses/bsd-license.php
*
* THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
* WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
*
**/
#include <Library/BaseLib.h>
#include <Library/UefiBootServicesTableLib.h>
#include <Library/DebugLib.h>
#include <Library/UefiLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/MemoryAllocationLib.h>
#include <Library/DevicePathLib.h>
#include <Library/XenIoMmioLib.h>
#include <Protocol/XenIo.h>
#include <Guid/XenBusRootDevice.h>
#pragma pack (1)
typedef struct {
VENDOR_DEVICE_PATH Vendor;
EFI_PHYSICAL_ADDRESS GrantTableAddress;
EFI_DEVICE_PATH_PROTOCOL End;
} XENBUS_ROOT_DEVICE_PATH;
#pragma pack ()
STATIC CONST XENBUS_ROOT_DEVICE_PATH mXenBusRootDevicePathTemplate = {
{
{
HARDWARE_DEVICE_PATH,
HW_VENDOR_DP,
{ sizeof (VENDOR_DEVICE_PATH) + sizeof (EFI_PHYSICAL_ADDRESS), 0 }
},
XENBUS_ROOT_DEVICE_GUID,
},
0,
{
END_DEVICE_PATH_TYPE,
END_ENTIRE_DEVICE_PATH_SUBTYPE,
{ sizeof (EFI_DEVICE_PATH_PROTOCOL), 0 }
}
};
/**
Install the XENBUS_ROOT_DEVICE_PATH and XENIO_PROTOCOL protocols on
the handle pointed to by @Handle, or on a new handle if it points to
NULL
@param Handle Pointer to the handle to install the protocols
on, may point to a NULL handle.
@param GrantTableAddress The address of the Xen grant table
@retval EFI_SUCCESS Protocols were installed successfully
@retval EFI_OUT_OF_RESOURCES The function failed to allocate memory required
by the XenIo MMIO and device path protocols
@return Status code returned by the boot service
InstallMultipleProtocolInterfaces ()
**/
EFI_STATUS
XenIoMmioInstall (
IN OUT EFI_HANDLE *Handle,
IN EFI_PHYSICAL_ADDRESS GrantTableAddress
)
{
EFI_STATUS Status;
XENIO_PROTOCOL *XenIo;
XENBUS_ROOT_DEVICE_PATH *XenBusDevicePath;
EFI_HANDLE OutHandle;
ASSERT (Handle != NULL);
OutHandle = *Handle;
XenIo = AllocateZeroPool (sizeof *XenIo);
if (!XenIo) {
return EFI_OUT_OF_RESOURCES;
}
XenIo->GrantTableAddress = GrantTableAddress;
XenBusDevicePath = AllocateCopyPool (sizeof *XenBusDevicePath,
&mXenBusRootDevicePathTemplate);
if (!XenBusDevicePath) {
DEBUG ((EFI_D_ERROR, "%a: Out of memory\n", __FUNCTION__));
Status = EFI_OUT_OF_RESOURCES;
goto FreeXenIo;
}
XenBusDevicePath->GrantTableAddress = GrantTableAddress;
Status = gBS->InstallMultipleProtocolInterfaces (&OutHandle,
&gEfiDevicePathProtocolGuid, XenBusDevicePath,
&gXenIoProtocolGuid, XenIo,
NULL);
if (!EFI_ERROR (Status)) {
*Handle = OutHandle;
return EFI_SUCCESS;
}
DEBUG ((EFI_D_ERROR, "%a: Failed to install the EFI_DEVICE_PATH and "
"XENIO_PROTOCOL protocols on handle %p (Status == %r)\n",
__FUNCTION__, OutHandle, Status));
FreePool (XenBusDevicePath);
FreeXenIo:
FreePool (XenIo);
return Status;
}
/**
Uninstall the XENBUS_ROOT_DEVICE_PATH and XENIO_PROTOCOL protocols
@param Handle Handle onto which the protocols have been installed
earlier by XenIoMmioInstall ()
@retval EFI_SUCCESS Protocols were uninstalled successfully
@return Status code returned by the boot service
UninstallMultipleProtocolInterfaces ()
**/
EFI_STATUS
XenIoMmioUninstall (
IN EFI_HANDLE Handle
)
{
EFI_STATUS Status;
VOID *XenIo;
VOID *XenBusDevicePath;
XenBusDevicePath = NULL;
gBS->OpenProtocol (Handle, &gEfiDevicePathProtocolGuid, &XenBusDevicePath,
NULL, NULL, EFI_OPEN_PROTOCOL_GET_PROTOCOL);
XenIo = NULL;
gBS->OpenProtocol (Handle, &gXenIoProtocolGuid, &XenIo,
NULL, NULL, EFI_OPEN_PROTOCOL_GET_PROTOCOL);
Status = gBS->UninstallMultipleProtocolInterfaces (Handle,
&gEfiDevicePathProtocolGuid, XenBusDevicePath,
&gXenIoProtocolGuid, XenIo,
NULL);
if (EFI_ERROR (Status)) {
return Status;
}
FreePool (XenBusDevicePath);
FreePool (XenIo);
return EFI_SUCCESS;
}

39
OvmfPkg/Library/XenIoMmioLib/XenIoMmioLib.inf Normal file
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## @file
# Manage XenBus device path and I/O handles
#
# Copyright (c) 2015, Linaro Ltd. All rights reserved.<BR>
#
# This program and the accompanying materials
# are licensed and made available under the terms and conditions of the BSD License
# which accompanies this distribution. The full text of the license may be found at
# http://opensource.org/licenses/bsd-license.php.
# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
#
#
##
[Defines]
INF_VERSION = 0x00010005
BASE_NAME = XenIoMmioLib
FILE_GUID = de9bdc19-8434-47bb-be3c-7f28f2101fd0
MODULE_TYPE = DXE_DRIVER
VERSION_STRING = 1.0
LIBRARY_CLASS = XenIoMmioLib
[Sources]
XenIoMmioLib.c
[Packages]
MdePkg/MdePkg.dec
OvmfPkg/OvmfPkg.dec
[LibraryClasses]
BaseMemoryLib
[Guids]
gXenBusRootDeviceGuid
[Protocols]
gEfiDevicePathProtocolGuid
gXenIoProtocolGuid

4
OvmfPkg/OvmfPkg.dec
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@ -48,6 +48,10 @@
#
XenHypercallLib|Include/Library/XenHypercallLib.h
## @libraryclass Manage XenBus device path and I/O handles
#
XenIoMmioLib|Include/Library/XenIoMmioLib.h
[Guids]
gUefiOvmfPkgTokenSpaceGuid = {0x93bb96af, 0xb9f2, 0x4eb8, {0x94, 0x62, 0xe0, 0xba, 0x74, 0x56, 0x42, 0x36}}
gEfiXenInfoGuid = {0xd3b46f3b, 0xd441, 0x1244, {0x9a, 0x12, 0x0, 0x12, 0x27, 0x3f, 0xc1, 0x4d}}