1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
|
/** @file
OVMF ACPI QEMU support
Copyright (c) 2008 - 2014, Intel Corporation. All rights reserved.<BR>
Copyright (C) 2012-2014, Red Hat, Inc.
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include <Library/DebugLib.h>
#include <Library/BaseLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/MemoryAllocationLib.h>
#include <Library/QemuFwCfgLib.h>
#include <Library/DxeServicesTableLib.h>
#include <Library/PcdLib.h>
#include <Library/OrderedCollectionLib.h>
#include <Library/TdxLib.h>
#include <IndustryStandard/Acpi.h>
#include <Protocol/AcpiSystemDescriptionTable.h>
#include <Protocol/AcpiTable.h>
#include <Library/UefiBootServicesTableLib.h>
#include <Library/UefiLib.h>
#include <Library/TdxMailboxLib.h>
#include <Protocol/Cpu.h>
#include <Uefi.h>
#include <TdxAcpiTable.h>
/**
At the beginning of system boot, a 4K-aligned, 4K-size memory (Td mailbox) is
pre-allocated by host VMM. BSP & APs do the page accept together in that memory
region.
After that TDVF is designed to relocate the mailbox to a 4K-aligned, 4K-size
memory block which is allocated in the ACPI Nvs memory. APs are waken up and
spin around the relocated mailbox for further command.
@return EFI_PHYSICAL_ADDRESS Address of the relocated mailbox
**/
EFI_PHYSICAL_ADDRESS
EFIAPI
RelocateMailbox (
VOID
)
{
EFI_PHYSICAL_ADDRESS Address;
VOID *ApLoopFunc;
UINT32 RelocationPages;
MP_RELOCATION_MAP RelocationMap;
MP_WAKEUP_MAILBOX *RelocatedMailBox;
EFI_STATUS Status;
Address = 0;
ApLoopFunc = NULL;
ZeroMem (&RelocationMap, sizeof (RelocationMap));
//
// Get information needed to setup aps running in their
// run loop in allocated acpi reserved memory
// Add another page for mailbox
//
AsmGetRelocationMap (&RelocationMap);
if ((RelocationMap.RelocateApLoopFuncAddress == 0) || (RelocationMap.RelocateApLoopFuncSize == 0)) {
DEBUG ((DEBUG_ERROR, "Failed to get the RelocationMap.\n"));
return 0;
}
RelocationPages = EFI_SIZE_TO_PAGES ((UINT32)RelocationMap.RelocateApLoopFuncSize) + 1;
Status = gBS->AllocatePages (AllocateAnyPages, EfiACPIMemoryNVS, RelocationPages, &Address);
if (EFI_ERROR (Status)) {
DEBUG ((DEBUG_ERROR, "Failed to allocate pages for MailboxRelocation. %r\n", Status));
return 0;
}
ZeroMem ((VOID *)Address, EFI_PAGES_TO_SIZE (RelocationPages));
ApLoopFunc = (VOID *)((UINTN)Address + EFI_PAGE_SIZE);
CopyMem (
ApLoopFunc,
RelocationMap.RelocateApLoopFuncAddress,
RelocationMap.RelocateApLoopFuncSize
);
DEBUG ((
DEBUG_INFO,
"Ap Relocation: mailbox %llx, loop %p\n",
Address,
ApLoopFunc
));
//
// Initialize mailbox
//
RelocatedMailBox = (MP_WAKEUP_MAILBOX *)Address;
RelocatedMailBox->Command = MpProtectedModeWakeupCommandNoop;
RelocatedMailBox->ApicId = MP_CPU_PROTECTED_MODE_MAILBOX_APICID_INVALID;
RelocatedMailBox->WakeUpVector = 0;
//
// Wakup APs and have been move to the finalized run loop
// They will spin until guest OS wakes them
//
MpSerializeStart ();
MpSendWakeupCommand (
MpProtectedModeWakeupCommandWakeup,
(UINT64)ApLoopFunc,
(UINT64)RelocatedMailBox,
0,
0,
0
);
return Address;
}
/**
Alter the MADT when ACPI Table from QEMU is available.
@param[in] Event Event whose notification function is being invoked
@param[in] Context Pointer to the notification function's context
**/
VOID
EFIAPI
AlterAcpiTable (
IN EFI_EVENT Event,
IN VOID *Context
)
{
EFI_ACPI_SDT_PROTOCOL *AcpiSdtProtocol;
EFI_ACPI_TABLE_PROTOCOL *AcpiTableProtocol;
EFI_STATUS Status;
UINTN Index;
EFI_ACPI_SDT_HEADER *Table;
EFI_ACPI_TABLE_VERSION Version;
UINTN OriginalTableKey;
UINTN NewTableKey;
UINT8 *NewMadtTable;
UINTN NewMadtTableLength;
EFI_PHYSICAL_ADDRESS RelocateMailboxAddress;
EFI_ACPI_6_4_MULTIPROCESSOR_WAKEUP_STRUCTURE *MadtMpWk;
EFI_ACPI_1_0_MULTIPLE_APIC_DESCRIPTION_TABLE_HEADER *MadtHeader;
Index = 0;
NewMadtTable = NULL;
MadtHeader = NULL;
Status = gBS->LocateProtocol (&gEfiAcpiSdtProtocolGuid, NULL, (void **)&AcpiSdtProtocol);
if (EFI_ERROR (Status)) {
DEBUG ((DEBUG_ERROR, "Unable to locate ACPI SDT protocol.\n"));
return;
}
RelocateMailboxAddress = RelocateMailbox ();
if (RelocateMailboxAddress == 0) {
ASSERT (FALSE);
DEBUG ((DEBUG_ERROR, "Failed to relocate Td mailbox\n"));
return;
}
do {
Status = AcpiSdtProtocol->GetAcpiTable (Index, &Table, &Version, &OriginalTableKey);
if (!EFI_ERROR (Status) && (Table->Signature == EFI_ACPI_1_0_APIC_SIGNATURE)) {
Status = gBS->LocateProtocol (&gEfiAcpiTableProtocolGuid, NULL, (void **)&AcpiTableProtocol);
if (EFI_ERROR (Status)) {
DEBUG ((DEBUG_ERROR, "Unable to locate ACPI Table protocol.\n"));
break;
}
NewMadtTableLength = Table->Length + sizeof (EFI_ACPI_6_4_MULTIPROCESSOR_WAKEUP_STRUCTURE);
NewMadtTable = AllocatePool (NewMadtTableLength);
if (NewMadtTable == NULL) {
DEBUG ((DEBUG_ERROR, "%a: OUT_OF_SOURCES error.\n", __FUNCTION__));
break;
}
CopyMem (NewMadtTable, (UINT8 *)Table, Table->Length);
MadtHeader = (EFI_ACPI_1_0_MULTIPLE_APIC_DESCRIPTION_TABLE_HEADER *)NewMadtTable;
MadtHeader->Header.Length = (UINT32)NewMadtTableLength;
MadtMpWk = (EFI_ACPI_6_4_MULTIPROCESSOR_WAKEUP_STRUCTURE *)(NewMadtTable + Table->Length);
MadtMpWk->Type = EFI_ACPI_6_4_MULTIPROCESSOR_WAKEUP;
MadtMpWk->Length = sizeof (EFI_ACPI_6_4_MULTIPROCESSOR_WAKEUP_STRUCTURE);
MadtMpWk->MailBoxVersion = 1;
MadtMpWk->Reserved = 0;
MadtMpWk->MailBoxAddress = RelocateMailboxAddress;
Status = AcpiTableProtocol->InstallAcpiTable (AcpiTableProtocol, NewMadtTable, NewMadtTableLength, &NewTableKey);
if (EFI_ERROR (Status)) {
DEBUG ((DEBUG_ERROR, "Failed to install new MADT table. %r\n", Status));
break;
}
Status = AcpiTableProtocol->UninstallAcpiTable (AcpiTableProtocol, OriginalTableKey);
if (EFI_ERROR (Status)) {
DEBUG ((DEBUG_ERROR, "Uninstall old MADT table error.\n"));
}
break;
}
Index++;
} while (!EFI_ERROR (Status));
if (NewMadtTable != NULL) {
FreePool (NewMadtTable);
}
}
|
