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 EFIAPI 26 XenHypercallHvmGetParam ( 27 IN UINT32 Index 28 ) 29 { 30 xen_hvm_param_t Parameter; 31 INTN Error; 32 33 Parameter.domid = DOMID_SELF; 34 Parameter.index = Index; 35 Error = XenHypercall2 (__HYPERVISOR_hvm_op, 36 HVMOP_get_param, (INTN) &Parameter); 37 if (Error != 0) { 38 DEBUG ((EFI_D_ERROR, 39 "XenHypercall: Error %Ld trying to get HVM parameter %d\n", 40 (INT64)Error, Index)); 41 return 0; 42 } 43 return Parameter.value; 44 } 45 46 INTN 47 EFIAPI 48 XenHypercallMemoryOp ( 49 IN UINTN Operation, 50 IN OUT VOID *Arguments 51 ) 52 { 53 return XenHypercall2 (__HYPERVISOR_memory_op, 54 Operation, (INTN) Arguments); 55 } 56 57 INTN 58 EFIAPI 59 XenHypercallEventChannelOp ( 60 IN INTN Operation, 61 IN OUT VOID *Arguments 62 ) 63 { 64 return XenHypercall2 (__HYPERVISOR_event_channel_op, 65 Operation, (INTN) Arguments); 66 } 67
