abcbbb14a4
Change in V4:
- Replace the license by the commonly used file header text.
- add file header to XenHypercall.h (license, copyright, brief desc)
Change in V3:
- adding IA32 support. (not reviewed yet)
both XenBusDxe/Ia32/hypercall.{S,asm} file are new
Change in V2:
- file header, copyright
- Add License
- Add push/pop instruction.
- fix types
- Comment of exported functions
- Improve coding style
- Add error handling in the main init function (of the drivers)
- Comment assembly
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@16260 6f19259b-4bc3-4df7-8a09-765794883524
119 lines
3.0 KiB
C
119 lines
3.0 KiB
C
/** @file
|
|
Functions to make Xen hypercalls.
|
|
|
|
Copyright (C) 2014, Citrix Ltd.
|
|
|
|
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 <PiDxe.h>
|
|
#include <Library/HobLib.h>
|
|
#include <Guid/XenInfo.h>
|
|
|
|
#include "XenBusDxe.h"
|
|
#include "XenHypercall.h"
|
|
|
|
#include <IndustryStandard/Xen/hvm/params.h>
|
|
#include <IndustryStandard/Xen/memory.h>
|
|
|
|
EFI_STATUS
|
|
XenHyperpageInit (
|
|
IN OUT XENBUS_DEVICE *Dev
|
|
)
|
|
{
|
|
EFI_HOB_GUID_TYPE *GuidHob;
|
|
EFI_XEN_INFO *XenInfo;
|
|
|
|
GuidHob = GetFirstGuidHob (&gEfiXenInfoGuid);
|
|
if (GuidHob == NULL) {
|
|
return EFI_NOT_FOUND;
|
|
}
|
|
XenInfo = (EFI_XEN_INFO *) GET_GUID_HOB_DATA (GuidHob);
|
|
Dev->Hyperpage = XenInfo->HyperPages;
|
|
return EFI_SUCCESS;
|
|
}
|
|
|
|
UINT64
|
|
XenHypercallHvmGetParam (
|
|
IN XENBUS_DEVICE *Dev,
|
|
IN INTN Index
|
|
)
|
|
{
|
|
xen_hvm_param_t Parameter;
|
|
INTN Error;
|
|
|
|
ASSERT (Dev->Hyperpage != NULL);
|
|
|
|
Parameter.domid = DOMID_SELF;
|
|
Parameter.index = Index;
|
|
Error = XenHypercall2 (Dev->Hyperpage + __HYPERVISOR_hvm_op * 32,
|
|
HVMOP_get_param, (INTN) &Parameter);
|
|
if (Error != 0) {
|
|
DEBUG ((EFI_D_ERROR,
|
|
"XenHypercall: Error %d trying to get HVM parameter %d\n",
|
|
Error, Index));
|
|
return 0;
|
|
}
|
|
return Parameter.value;
|
|
}
|
|
|
|
INTN
|
|
XenHypercallMemoryOp (
|
|
IN XENBUS_DEVICE *Dev,
|
|
IN UINTN Operation,
|
|
IN OUT VOID *Arguments
|
|
)
|
|
{
|
|
ASSERT (Dev->Hyperpage != NULL);
|
|
return XenHypercall2 (Dev->Hyperpage + __HYPERVISOR_memory_op * 32,
|
|
Operation, (INTN) Arguments);
|
|
}
|
|
|
|
INTN
|
|
XenHypercallEventChannelOp (
|
|
IN XENBUS_DEVICE *Dev,
|
|
IN INTN Operation,
|
|
IN OUT VOID *Arguments
|
|
)
|
|
{
|
|
ASSERT (Dev->Hyperpage != NULL);
|
|
return XenHypercall2 (Dev->Hyperpage + __HYPERVISOR_event_channel_op * 32,
|
|
Operation, (INTN) Arguments);
|
|
}
|
|
|
|
EFI_STATUS
|
|
XenGetSharedInfoPage (
|
|
IN OUT XENBUS_DEVICE *Dev
|
|
)
|
|
{
|
|
xen_add_to_physmap_t Parameter;
|
|
|
|
ASSERT (Dev->SharedInfo == NULL);
|
|
|
|
Parameter.domid = DOMID_SELF;
|
|
Parameter.space = XENMAPSPACE_shared_info;
|
|
Parameter.idx = 0;
|
|
|
|
//
|
|
// using reserved page because the page is not released when Linux is
|
|
// starting because of the add_to_physmap. QEMU might try to access the
|
|
// page, and fail because it have no right to do so (segv).
|
|
//
|
|
Dev->SharedInfo = AllocateReservedPages (1);
|
|
Parameter.gpfn = (UINTN) Dev->SharedInfo >> EFI_PAGE_SHIFT;
|
|
if (XenHypercallMemoryOp (Dev, XENMEM_add_to_physmap, &Parameter) != 0) {
|
|
FreePages (Dev->SharedInfo, 1);
|
|
Dev->SharedInfo = NULL;
|
|
return EFI_LOAD_ERROR;
|
|
}
|
|
|
|
return EFI_SUCCESS;
|
|
}
|