summaryrefslogtreecommitdiff
path: root/MdeModulePkg/Universal/Acpi/FirmwarePerformanceDataTableSmm/FirmwarePerformanceSmm.c
blob: 54a2275d4ed908bcd0e480242d4de82885d6bd15 (plain)
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
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
/** @file
  This module collects performance data for SMM driver boot records and S3 Suspend Performance Record.

  This module registers report status code listener to collect performance data
  for SMM driver boot records and S3 Suspend Performance Record.

  Caution: This module requires additional review when modified.
  This driver will have external input - communicate buffer in SMM mode.
  This external input must be validated carefully to avoid security issue like
  buffer overflow, integer overflow.

  FpdtSmiHandler() will receive untrusted input and do basic validation.

  Copyright (c) 2011 - 2012, Intel Corporation. All rights reserved.<BR>
  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 <PiSmm.h>

#include <Protocol/SmmReportStatusCodeHandler.h>
#include <Protocol/SmmAccess2.h>

#include <Guid/FirmwarePerformance.h>

#include <Library/SmmServicesTableLib.h>
#include <Library/BaseLib.h>
#include <Library/DebugLib.h>
#include <Library/TimerLib.h>
#include <Library/LockBoxLib.h>
#include <Library/PcdLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/MemoryAllocationLib.h>
#include <Library/UefiBootServicesTableLib.h>
#include <Library/SynchronizationLib.h>

#define EXTENSION_RECORD_SIZE     0x1000

EFI_SMM_RSC_HANDLER_PROTOCOL  *mRscHandlerProtocol    = NULL;
UINT64                        mSuspendStartTime       = 0;
BOOLEAN                       mS3SuspendLockBoxSaved  = FALSE;
UINT32                        mBootRecordSize = 0;
UINT32                        mBootRecordMaxSize = 0;
UINT8                         *mBootRecordBuffer = NULL;

EFI_SMRAM_DESCRIPTOR          *mSmramRanges;
UINTN                         mSmramRangeCount;
SPIN_LOCK                     mSmmFpdtLock;
BOOLEAN                       mSmramIsOutOfResource = FALSE;

/**
  Report status code listener for SMM. This is used to record the performance
  data for S3 Suspend Start and S3 Suspend End in FPDT.

  @param[in]  CodeType            Indicates the type of status code being reported.
  @param[in]  Value               Describes the current status of a hardware or software entity.
                                  This included information about the class and subclass that is used to
                                  classify the entity as well as an operation.
  @param[in]  Instance            The enumeration of a hardware or software entity within
                                  the system. Valid instance numbers start with 1.
  @param[in]  CallerId            This optional parameter may be used to identify the caller.
                                  This parameter allows the status code driver to apply different rules to
                                  different callers.
  @param[in]  Data                This optional parameter may be used to pass additional data.

  @retval EFI_SUCCESS             Status code is what we expected.
  @retval EFI_UNSUPPORTED         Status code not supported.

**/
EFI_STATUS
EFIAPI
FpdtStatusCodeListenerSmm (
  IN EFI_STATUS_CODE_TYPE     CodeType,
  IN EFI_STATUS_CODE_VALUE    Value,
  IN UINT32                   Instance,
  IN EFI_GUID                 *CallerId,
  IN EFI_STATUS_CODE_DATA     *Data
  )
{
  EFI_STATUS                           Status;
  UINT64                               CurrentTime;
  EFI_ACPI_5_0_FPDT_S3_SUSPEND_RECORD  S3SuspendRecord;
  UINT8                                *NewRecordBuffer;

  //
  // Check whether status code is what we are interested in.
  //
  if ((CodeType & EFI_STATUS_CODE_TYPE_MASK) != EFI_PROGRESS_CODE) {
    return EFI_UNSUPPORTED;
  }
  
  //
  // Collect one or more Boot records in boot time
  //
  if (Data != NULL && CompareGuid (&Data->Type, &gEfiFirmwarePerformanceGuid)) {
    AcquireSpinLock (&mSmmFpdtLock);
    
    if (mBootRecordSize + Data->Size > mBootRecordMaxSize) {
      //
      // Try to allocate big SMRAM data to store Boot record. 
      //
      if (mSmramIsOutOfResource) {
        ReleaseSpinLock (&mSmmFpdtLock);
        return EFI_OUT_OF_RESOURCES;
      }
      NewRecordBuffer = ReallocatePool (mBootRecordSize, mBootRecordSize + Data->Size + EXTENSION_RECORD_SIZE, mBootRecordBuffer); 
      if (NewRecordBuffer == NULL) {
        ReleaseSpinLock (&mSmmFpdtLock);
        mSmramIsOutOfResource = TRUE;
        return EFI_OUT_OF_RESOURCES;
      }
      mBootRecordBuffer  = NewRecordBuffer;
      mBootRecordMaxSize = mBootRecordSize + Data->Size + EXTENSION_RECORD_SIZE;
    }
    //
    // Save boot record into the temp memory space.
    //
    CopyMem (mBootRecordBuffer + mBootRecordSize, Data + 1, Data->Size);
    mBootRecordSize += Data->Size;
    
    ReleaseSpinLock (&mSmmFpdtLock);
    return EFI_SUCCESS;
  }

  if ((Value != PcdGet32 (PcdProgressCodeS3SuspendStart)) &&
      (Value != PcdGet32 (PcdProgressCodeS3SuspendEnd))) {
    return EFI_UNSUPPORTED;
  }

  //
  // Retrieve current time.
  //
  CurrentTime = GetTimeInNanoSecond (GetPerformanceCounter ());

  if (Value == PcdGet32 (PcdProgressCodeS3SuspendStart)) {
    //
    // S3 Suspend started, record the performance data and return.
    //
    mSuspendStartTime = CurrentTime;
    return EFI_SUCCESS;
  }

  //
  // We are going to S3 sleep, record S3 Suspend End performance data.
  //
  S3SuspendRecord.SuspendStart = mSuspendStartTime;
  S3SuspendRecord.SuspendEnd   = CurrentTime;

  //
  // Save S3 suspend performance data to lock box, it will be used by Firmware Performance PEIM.
  //
  if (!mS3SuspendLockBoxSaved) {
    Status = SaveLockBox (
               &gEfiFirmwarePerformanceGuid,
               &S3SuspendRecord,
               sizeof (EFI_ACPI_5_0_FPDT_S3_SUSPEND_RECORD)
               );
    ASSERT_EFI_ERROR (Status);

    mS3SuspendLockBoxSaved = TRUE;
  } else {
    Status = UpdateLockBox (
               &gEfiFirmwarePerformanceGuid,
               0,
               &S3SuspendRecord,
               sizeof (EFI_ACPI_5_0_FPDT_S3_SUSPEND_RECORD)
               );
    ASSERT_EFI_ERROR (Status);
  }

  return EFI_SUCCESS;
}

/**
  This function check if the address is in SMRAM.

  @param Buffer  the buffer address to be checked.
  @param Length  the buffer length to be checked.

  @retval TRUE  this address is in SMRAM.
  @retval FALSE this address is NOT in SMRAM.
**/
BOOLEAN
InternalIsAddressInSmram (
  IN EFI_PHYSICAL_ADDRESS  Buffer,
  IN UINT64                Length
  )
{
  UINTN  Index;

  for (Index = 0; Index < mSmramRangeCount; Index ++) {
    if (((Buffer >= mSmramRanges[Index].CpuStart) && (Buffer < mSmramRanges[Index].CpuStart + mSmramRanges[Index].PhysicalSize)) ||
        ((mSmramRanges[Index].CpuStart >= Buffer) && (mSmramRanges[Index].CpuStart < Buffer + Length))) {
      return TRUE;
    }
  }

  return FALSE;
}

/**
  Communication service SMI Handler entry.

  This SMI handler provides services for report SMM boot records. 

  Caution: This function may receive untrusted input.
  Communicate buffer and buffer size are external input, so this function will do basic validation.

  @param[in]     DispatchHandle  The unique handle assigned to this handler by SmiHandlerRegister().
  @param[in]     RegisterContext Points to an optional handler context which was specified when the
                                 handler was registered.
  @param[in, out] CommBuffer     A pointer to a collection of data in memory that will
                                 be conveyed from a non-SMM environment into an SMM environment.
  @param[in, out] CommBufferSize The size of the CommBuffer.

  @retval EFI_SUCCESS                         The interrupt was handled and quiesced. No other handlers 
                                              should still be called.
  @retval EFI_WARN_INTERRUPT_SOURCE_QUIESCED  The interrupt has been quiesced but other handlers should 
                                              still be called.
  @retval EFI_WARN_INTERRUPT_SOURCE_PENDING   The interrupt is still pending and other handlers should still 
                                              be called.
  @retval EFI_INTERRUPT_PENDING               The interrupt could not be quiesced.

**/
EFI_STATUS
EFIAPI
FpdtSmiHandler (
  IN     EFI_HANDLE                   DispatchHandle,
  IN     CONST VOID                   *RegisterContext,
  IN OUT VOID                         *CommBuffer,
  IN OUT UINTN                        *CommBufferSize
  )
{
  EFI_STATUS                   Status;
  SMM_BOOT_RECORD_COMMUNICATE  *SmmCommData;

  //
  // If input is invalid, stop processing this SMI
  //
  if (CommBuffer == NULL || CommBufferSize == NULL) {
    return EFI_SUCCESS;
  }

  if(*CommBufferSize < sizeof (SMM_BOOT_RECORD_COMMUNICATE)) {
    return EFI_SUCCESS;
  }
  
  if (InternalIsAddressInSmram ((EFI_PHYSICAL_ADDRESS)(UINTN)CommBuffer, *CommBufferSize)) {
    DEBUG ((EFI_D_ERROR, "SMM communication data buffer is in SMRAM!\n"));
    return EFI_SUCCESS;
  }

  SmmCommData = (SMM_BOOT_RECORD_COMMUNICATE*)CommBuffer;

  Status = EFI_SUCCESS;

  switch (SmmCommData->Function) {
    case SMM_FPDT_FUNCTION_GET_BOOT_RECORD_SIZE :
       SmmCommData->BootRecordSize = mBootRecordSize;
       break;

    case SMM_FPDT_FUNCTION_GET_BOOT_RECORD_DATA :
       if (SmmCommData->BootRecordData == NULL || SmmCommData->BootRecordSize < mBootRecordSize) {
         Status = EFI_INVALID_PARAMETER;
         break;
       } 

       //
       // Sanity check
       //
       SmmCommData->BootRecordSize = mBootRecordSize;
       if (InternalIsAddressInSmram ((EFI_PHYSICAL_ADDRESS)(UINTN)SmmCommData->BootRecordData, mBootRecordSize)) {
         DEBUG ((EFI_D_ERROR, "SMM Data buffer is in SMRAM!\n"));
         Status = EFI_ACCESS_DENIED;
         break;
       }

       CopyMem (
         (UINT8*)SmmCommData->BootRecordData, 
         mBootRecordBuffer, 
         mBootRecordSize
         );
       break;

    default:
       Status = EFI_UNSUPPORTED;
  }

  SmmCommData->ReturnStatus = Status;
  
  return EFI_SUCCESS;
}

/**
  The module Entry Point of the Firmware Performance Data Table SMM driver.

  @param[in]  ImageHandle    The firmware allocated handle for the EFI image.
  @param[in]  SystemTable    A pointer to the EFI System Table.

  @retval EFI_SUCCESS    The entry point is executed successfully.
  @retval Other          Some error occurs when executing this entry point.

**/
EFI_STATUS
EFIAPI
FirmwarePerformanceSmmEntryPoint (
  IN EFI_HANDLE          ImageHandle,
  IN EFI_SYSTEM_TABLE    *SystemTable
  )
{
  EFI_STATUS                Status;
  EFI_HANDLE                Handle;
  EFI_SMM_ACCESS2_PROTOCOL  *SmmAccess;
  UINTN                     Size;

  //
  // Initialize spin lock
  //
  InitializeSpinLock (&mSmmFpdtLock); 
   
  //
  // Get SMM Report Status Code Handler Protocol.
  //
  Status = gSmst->SmmLocateProtocol (
                    &gEfiSmmRscHandlerProtocolGuid,
                    NULL,
                    (VOID **) &mRscHandlerProtocol
                    );
  ASSERT_EFI_ERROR (Status);

  //
  // Register report status code listener for BootRecords and S3 Suspend Start and End.
  //
  Status = mRscHandlerProtocol->Register (FpdtStatusCodeListenerSmm);
  ASSERT_EFI_ERROR (Status);

  //
  // Get SMRAM information
  //
  Status = gBS->LocateProtocol (&gEfiSmmAccess2ProtocolGuid, NULL, (VOID **)&SmmAccess);
  ASSERT_EFI_ERROR (Status);

  Size = 0;
  Status = SmmAccess->GetCapabilities (SmmAccess, &Size, NULL);
  ASSERT (Status == EFI_BUFFER_TOO_SMALL);

  Status = gSmst->SmmAllocatePool (
                    EfiRuntimeServicesData,
                    Size,
                    (VOID **)&mSmramRanges
                    );
  ASSERT_EFI_ERROR (Status);

  Status = SmmAccess->GetCapabilities (SmmAccess, &Size, mSmramRanges);
  ASSERT_EFI_ERROR (Status);

  mSmramRangeCount = Size / sizeof (EFI_SMRAM_DESCRIPTOR);

  //
  // Register SMI handler.
  //
  Handle = NULL;
  Status = gSmst->SmiHandlerRegister (FpdtSmiHandler, &gEfiFirmwarePerformanceGuid, &Handle);
  ASSERT_EFI_ERROR (Status);

  return Status;
}