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 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 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 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
