1 /** @file
2 Functions to make Xen hypercalls.
3
4 Copyright (C) 2014, Citrix Ltd.
5
6 This program and the accompanying materials
7 are licensed and made available under the terms and conditions of the BSD License
8 which accompanies this distribution. The full text of the license may be found at
9 http://opensource.org/licenses/bsd-license.php
10
11 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
12 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
13
14 **/
15
16 #include <PiDxe.h>
17
18 #include <IndustryStandard/Xen/hvm/params.h>
19 #include <IndustryStandard/Xen/memory.h>
20
21 #include <Library/DebugLib.h>
22 #include <Library/XenHypercallLib.h>
23
24 UINT64
XenHypercallHvmGetParam(IN UINT32 Index)25 XenHypercallHvmGetParam (
26 IN UINT32 Index
27 )
28 {
29 xen_hvm_param_t Parameter;
30 INTN Error;
31
32 Parameter.domid = DOMID_SELF;
33 Parameter.index = Index;
34 Error = XenHypercall2 (__HYPERVISOR_hvm_op,
35 HVMOP_get_param, (INTN) &Parameter);
36 if (Error != 0) {
37 DEBUG ((EFI_D_ERROR,
38 "XenHypercall: Error %Ld trying to get HVM parameter %d\n",
39 (INT64)Error, Index));
40 return 0;
41 }
42 return Parameter.value;
43 }
44
45 INTN
XenHypercallMemoryOp(IN UINTN Operation,IN OUT VOID * Arguments)46 XenHypercallMemoryOp (
47 IN UINTN Operation,
48 IN OUT VOID *Arguments
49 )
50 {
51 return XenHypercall2 (__HYPERVISOR_memory_op,
52 Operation, (INTN) Arguments);
53 }
54
55 INTN
XenHypercallEventChannelOp(IN INTN Operation,IN OUT VOID * Arguments)56 XenHypercallEventChannelOp (
57 IN INTN Operation,
58 IN OUT VOID *Arguments
59 )
60 {
61 return XenHypercall2 (__HYPERVISOR_event_channel_op,
62 Operation, (INTN) Arguments);
63 }
64