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system76-edk2/UefiCpuPkg/Library/CpuPageTableLib/UnitTest/RandomTest.c
Dun Tan aea5930c40 UefiCpuPkg/CpuPageTableLib: Add RandomTest for PAE paging 
Add RandomTest for PAE paging.

Signed-off-by: Dun Tan <dun.tan@intel.com>
Cc: Eric Dong <eric.dong@intel.com>
Reviewed-by: Ray Ni <ray.ni@intel.com>
Cc: Rahul Kumar <rahul1.kumar@intel.com>
Tested-by: Gerd Hoffmann <kraxel@redhat.com>
Acked-by: Gerd Hoffmann <kraxel@redhat.com>
2023-03-27 08:21:58 +00:00

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/** @file
Random test case for Unit tests of the CpuPageTableLib instance of the CpuPageTableLib class
Copyright (c) 2022 - 2023, Intel Corporation. All rights reserved.<BR>
SPDX-License-Identifier: BSD-2-Clause-Patent
**/
#include "CpuPageTableLibUnitTest.h"
#include "RandomTest.h"
UINTN RandomNumber = 0;
extern IA32_PAGING_ENTRY mValidMaskNoLeaf[6];
extern IA32_PAGING_ENTRY mValidMaskLeaf[6];
extern IA32_PAGING_ENTRY mValidMaskLeafFlag[6];
UINTN mRandomOption;
IA32_MAP_ATTRIBUTE mSupportedBit;
extern UINTN mNumberCount;
extern UINT8 mNumbers[];
UINTN mNumberIndex;
UINT64 AlignedTable[] = {
~((UINT64)SIZE_4KB - 1),
~((UINT64)SIZE_2MB - 1),
~((UINT64)SIZE_1GB - 1)
};
/**
Generates a pseudorandom byte stream of the specified size.
Return FALSE to indicate this interface is not supported.
@param[out] Output Pointer to buffer to receive random value.
@param[in] Size Size of random bytes to generate.
@retval TRUE Always return TRUE
**/
BOOLEAN
EFIAPI
RandomBytesUsingArray (
OUT UINT8 *Output,
IN UINTN Size
)
{
UINTN Index;
for (Index = 0; Index < Size; Index++) {
if (mNumberIndex >= mNumberCount) {
mNumberIndex = 0;
}
Output[Index] = mNumbers[mNumberIndex];
mNumberIndex++;
}
return TRUE;
}
/**
Generates a pseudorandom byte stream of the specified size.
Return FALSE to indicate this interface is not supported.
@param[out] Output Pointer to buffer to receive random value.
@param[in] Size Size of random bytes to generate.
@retval TRUE Pseudorandom byte stream generated successfully.
@retval FALSE Pseudorandom number generator fails
**/
BOOLEAN
EFIAPI
LocalRandomBytes (
OUT UINT8 *Output,
IN UINTN Size
)
{
if (mRandomOption & USE_RANDOM_ARRAY) {
return RandomBytesUsingArray (Output, Size);
} else {
return RandomBytes (Output, Size);
}
}
/**
Return a 32bit random number.
@param Start Start of the random number range.
@param Limit Limit of the random number range, and return value can be Limit.
@return 32bit random number
**/
UINT32
Random32 (
UINT32 Start,
UINT32 Limit
)
{
UINT64 Value;
LocalRandomBytes ((UINT8 *)&Value, sizeof (UINT64));
return (UINT32)(Value % (Limit - Start + 1)) + Start;
}
/**
Return a 64bit random number.
@param Start Start of the random number range.
@param Limit Limit of the random number range, and return value can be Limit.
@return 64bit random number
**/
UINT64
Random64 (
UINT64 Start,
UINT64 Limit
)
{
UINT64 Value;
LocalRandomBytes ((UINT8 *)&Value, sizeof (UINT64));
if (Limit - Start == MAX_UINT64) {
return (UINT64)(Value);
}
return (UINT64)(Value % (Limit - Start + 1)) + Start;
}
/**
Returns true with the percentage of input Probability.
@param[in] Probability The percentage to return true.
@return boolean
**/
BOOLEAN
RandomBoolean (
UINT8 Probability
)
{
return ((Probability > ((UINT8)Random64 (0, 100))) ? TRUE : FALSE);
}
/**
Check if the Page table entry is valid
@param[in] PagingEntry The entry in page table to verify
@param[in] Level the level of PagingEntry.
@param[in] MaxLeafLevel Max leaf entry level.
@param[in] LinearAddress The linear address verified.
@retval Leaf entry.
**/
UNIT_TEST_STATUS
ValidateAndRandomeModifyPageTablePageTableEntry (
IN IA32_PAGING_ENTRY *PagingEntry,
IN UINTN Level,
IN UINTN MaxLeafLevel,
IN UINT64 Address
)
{
UINT64 Index;
UINT32 PageTableBaseAddressLow;
UINT32 PageTableBaseAddressHigh;
IA32_PAGING_ENTRY *ChildPageEntry;
UNIT_TEST_STATUS Status;
if (PagingEntry->Pce.Present == 0) {
return UNIT_TEST_PASSED;
}
if ((PagingEntry->Uint64 & mValidMaskLeafFlag[Level].Uint64) == mValidMaskLeafFlag[Level].Uint64) {
//
// It is a Leaf
//
if (Level > MaxLeafLevel) {
UT_ASSERT_TRUE (Level <= MaxLeafLevel);
}
if ((PagingEntry->Uint64 & mValidMaskLeaf[Level].Uint64) != PagingEntry->Uint64) {
UT_ASSERT_EQUAL ((PagingEntry->Uint64 & mValidMaskLeaf[Level].Uint64), PagingEntry->Uint64);
}
if ((RandomNumber < 100) && RandomBoolean (50)) {
RandomNumber++;
if (Level == 1) {
PageTableBaseAddressLow = PagingEntry->Pte4K.Bits.PageTableBaseAddressLow;
PageTableBaseAddressHigh = PagingEntry->Pte4K.Bits.PageTableBaseAddressHigh;
} else {
PageTableBaseAddressLow = PagingEntry->PleB.Bits.PageTableBaseAddressLow;
PageTableBaseAddressHigh = PagingEntry->PleB.Bits.PageTableBaseAddressHigh;
}
PagingEntry->Uint64 = (Random64 (0, MAX_UINT64) & mValidMaskLeaf[Level].Uint64) | mValidMaskLeafFlag[Level].Uint64;
PagingEntry->Pte4K.Bits.Present = 1;
if (Level == 1) {
PagingEntry->Pte4K.Bits.PageTableBaseAddressLow = PageTableBaseAddressLow;
PagingEntry->Pte4K.Bits.PageTableBaseAddressHigh = PageTableBaseAddressHigh;
} else {
PagingEntry->PleB.Bits.PageTableBaseAddressLow = PageTableBaseAddressLow;
PagingEntry->PleB.Bits.PageTableBaseAddressHigh = PageTableBaseAddressHigh;
}
if ((PagingEntry->Uint64 & mValidMaskLeaf[Level].Uint64) != PagingEntry->Uint64) {
UT_ASSERT_EQUAL ((PagingEntry->Uint64 & mValidMaskLeaf[Level].Uint64), PagingEntry->Uint64);
}
}
return UNIT_TEST_PASSED;
}
//
// Not a leaf
//
UT_ASSERT_NOT_EQUAL (Level, 1);
if ((PagingEntry->Uint64 & mValidMaskNoLeaf[Level].Uint64) != PagingEntry->Uint64) {
DEBUG ((DEBUG_ERROR, "ERROR: Level %d no Leaf entry is 0x%lx, which reserved bit is set \n", Level, PagingEntry->Uint64));
UT_ASSERT_EQUAL ((PagingEntry->Uint64 & mValidMaskNoLeaf[Level].Uint64), PagingEntry->Uint64);
}
if ((RandomNumber < 100) && RandomBoolean (50)) {
RandomNumber++;
PageTableBaseAddressLow = PagingEntry->PleB.Bits.PageTableBaseAddressLow;
PageTableBaseAddressHigh = PagingEntry->PleB.Bits.PageTableBaseAddressHigh;
PagingEntry->Uint64 = Random64 (0, MAX_UINT64) & mValidMaskNoLeaf[Level].Uint64;
PagingEntry->Pnle.Bits.Present = 1;
PagingEntry->PleB.Bits.PageTableBaseAddressLow = PageTableBaseAddressLow;
PagingEntry->PleB.Bits.PageTableBaseAddressHigh = PageTableBaseAddressHigh;
ASSERT ((PagingEntry->Uint64 & mValidMaskLeafFlag[Level].Uint64) != mValidMaskLeafFlag[Level].Uint64);
}
ChildPageEntry = (IA32_PAGING_ENTRY *)(UINTN)(IA32_PNLE_PAGE_TABLE_BASE_ADDRESS (&PagingEntry->Pnle));
for (Index = 0; Index < 512; Index++) {
Status = ValidateAndRandomeModifyPageTablePageTableEntry (&ChildPageEntry[Index], Level-1, MaxLeafLevel, Address + (Index<<(9*(Level-1) + 3)));
if (Status != UNIT_TEST_PASSED) {
return Status;
}
}
return UNIT_TEST_PASSED;
}
/**
Check if the Page table is valid
@param[in] PageTable The pointer to the page table.
@param[in] PagingMode The paging mode.
@retval UNIT_TEST_PASSED It is a valid Page Table
**/
UNIT_TEST_STATUS
ValidateAndRandomeModifyPageTable (
IN UINTN PageTable,
IN PAGING_MODE PagingMode
)
{
UINTN MaxLevel;
UINTN MaxLeafLevel;
UINT64 Index;
UNIT_TEST_STATUS Status;
IA32_PAGING_ENTRY *PagingEntry;
if ((PagingMode == Paging32bit) || (PagingMode >= PagingModeMax)) {
//
// 32bit paging is never supported.
//
return UNIT_TEST_ERROR_TEST_FAILED;
}
MaxLeafLevel = (UINT8)PagingMode;
MaxLevel = (UINT8)(PagingMode >> 8);
PagingEntry = (IA32_PAGING_ENTRY *)(UINTN)PageTable;
for (Index = 0; Index < 512; Index++) {
Status = ValidateAndRandomeModifyPageTablePageTableEntry (&PagingEntry[Index], MaxLevel, MaxLeafLevel, Index << (9 * MaxLevel + 3));
if (Status != UNIT_TEST_PASSED) {
return Status;
}
}
return Status;
}
/**
Remove the last MAP_ENTRY in MapEntrys.
@param MapEntrys Pointer to MapEntrys buffer
**/
VOID
RemoveLastMapEntry (
IN OUT MAP_ENTRYS *MapEntrys
)
{
UINTN MapsIndex;
if (MapEntrys->Count == 0) {
return;
}
MapsIndex = MapEntrys->Count - 1;
ZeroMem (&(MapEntrys->Maps[MapsIndex]), sizeof (MAP_ENTRY));
MapEntrys->Count = MapsIndex;
}
/**
Generate single random map entry.
The map entry can be the input of function PageTableMap
the LinearAddress and length is aligned to aligned table.
@param MaxAddress Max Address.
@param MapEntrys Output MapEntrys contains all parameter as input of function PageTableMap
**/
VOID
GenerateSingleRandomMapEntry (
IN UINT64 MaxAddress,
IN OUT MAP_ENTRYS *MapEntrys
)
{
UINTN MapsIndex;
UINT64 FormerLinearAddress;
UINT64 FormerLinearAddressBottom;
UINT64 FormerLinearAddressTop;
MapsIndex = MapEntrys->Count;
ASSERT (MapsIndex < MapEntrys->MaxCount);
//
// use AlignedTable to avoid that a random number can be very hard to be 1G or 2M aligned
//
if ((MapsIndex != 0) && (RandomBoolean (50))) {
FormerLinearAddress = MapEntrys->Maps[Random32 (0, (UINT32)MapsIndex-1)].LinearAddress;
if (FormerLinearAddress < 2 * (UINT64)SIZE_1GB) {
FormerLinearAddressBottom = 0;
} else {
FormerLinearAddressBottom = FormerLinearAddress - 2 * (UINT64)SIZE_1GB;
}
if (FormerLinearAddress + 2 * (UINT64)SIZE_1GB > MaxAddress) {
FormerLinearAddressTop = MaxAddress;
} else {
FormerLinearAddressTop = FormerLinearAddress + 2 * (UINT64)SIZE_1GB;
}
MapEntrys->Maps[MapsIndex].LinearAddress = Random64 (FormerLinearAddressBottom, FormerLinearAddressTop) & AlignedTable[Random32 (0, ARRAY_SIZE (AlignedTable) -1)];
} else {
MapEntrys->Maps[MapsIndex].LinearAddress = Random64 (0, MaxAddress) & AlignedTable[Random32 (0, ARRAY_SIZE (AlignedTable) -1)];
}
//
// To have better performance, limit the size less than 10G
//
MapEntrys->Maps[MapsIndex].Length = Random64 (0, MIN (MaxAddress - MapEntrys->Maps[MapsIndex].LinearAddress, 10 * (UINT64)SIZE_1GB)) & AlignedTable[Random32 (0, ARRAY_SIZE (AlignedTable) -1)];
if ((MapsIndex != 0) && (RandomBoolean (50))) {
MapEntrys->Maps[MapsIndex].Attribute.Uint64 = MapEntrys->Maps[Random32 (0, (UINT32)MapsIndex-1)].Attribute.Uint64;
MapEntrys->Maps[MapsIndex].Mask.Uint64 = MapEntrys->Maps[Random32 (0, (UINT32)MapsIndex-1)].Mask.Uint64;
} else {
MapEntrys->Maps[MapsIndex].Attribute.Uint64 = Random64 (0, MAX_UINT64) & mSupportedBit.Uint64;
if (RandomBoolean (5)) {
//
// The probability to get random Mask should be small since all bits of a random number
// have a high probability of containing 0, which may be a invalid input.
//
MapEntrys->Maps[MapsIndex].Mask.Uint64 = Random64 (0, MAX_UINT64) & mSupportedBit.Uint64;
} else {
MapEntrys->Maps[MapsIndex].Mask.Uint64 = MAX_UINT64;
}
if (MapEntrys->Maps[MapsIndex].Mask.Bits.ProtectionKey != 0) {
MapEntrys->Maps[MapsIndex].Mask.Bits.ProtectionKey = 0xF;
}
}
if (mRandomOption & ONLY_ONE_ONE_MAPPING) {
MapEntrys->Maps[MapsIndex].Attribute.Uint64 &= (~IA32_MAP_ATTRIBUTE_PAGE_TABLE_BASE_ADDRESS_MASK);
MapEntrys->Maps[MapsIndex].Attribute.Uint64 |= MapEntrys->Maps[MapsIndex].LinearAddress;
MapEntrys->Maps[MapsIndex].Mask.Uint64 |= IA32_MAP_ATTRIBUTE_PAGE_TABLE_BASE_ADDRESS_MASK;
} else {
MapEntrys->Maps[MapsIndex].Attribute.Uint64 &= (~IA32_MAP_ATTRIBUTE_PAGE_TABLE_BASE_ADDRESS_MASK);
MapEntrys->Maps[MapsIndex].Attribute.Uint64 |= (Random64 (0, (((UINT64)1)<<52) - 1) & AlignedTable[Random32 (0, ARRAY_SIZE (AlignedTable) -1)]);
}
MapEntrys->Count += 1;
}
/**
Compare the attribute for one point.
MapEntrys records every memory ranges that is used as input
Map and MapCount are gotten from Page table
Compare if this point have same attribute.
@param[in] Address Address of one Point.
@param[in] MapEntrys Record every memory ranges that is used as input
@param[in] Map Pointer to an array that describes multiple linear address ranges.
@param[in] MapCount Pointer to a UINTN that hold the number of entries in the Map.
@param[in] InitMap Pointer to an array that describes init map entries.
@param[in] InitMapCount Pointer to a UINTN that hold the number of init map entries.
@retval TRUE At least one byte of data is available to be read
@retval FALSE No data is available to be read
**/
BOOLEAN
CompareEntrysforOnePoint (
IN UINT64 Address,
IN MAP_ENTRYS *MapEntrys,
IN IA32_MAP_ENTRY *Map,
IN UINTN MapCount,
IN IA32_MAP_ENTRY *InitMap,
IN UINTN InitMapCount
)
{
UINTN Index;
IA32_MAP_ATTRIBUTE AttributeInInitMap;
IA32_MAP_ATTRIBUTE AttributeInMap;
IA32_MAP_ATTRIBUTE AttributeInMapEntrys;
IA32_MAP_ATTRIBUTE MaskInMapEntrys;
AttributeInMap.Uint64 = 0;
AttributeInMapEntrys.Uint64 = 0;
AttributeInInitMap.Uint64 = 0;
MaskInMapEntrys.Uint64 = 0;
//
// Assume every entry in maps does not overlap with each other
//
for (Index = 0; Index < MapCount; Index++) {
if ((Address >= Map[Index].LinearAddress) && (Address < (Map[Index].LinearAddress + Map[Index].Length))) {
AttributeInMap.Uint64 = (Map[Index].Attribute.Uint64 & mSupportedBit.Uint64);
AttributeInMap.Uint64 &= (~IA32_MAP_ATTRIBUTE_PAGE_TABLE_BASE_ADDRESS_MASK);
AttributeInMap.Uint64 |= (Address - Map[Index].LinearAddress + IA32_MAP_ATTRIBUTE_PAGE_TABLE_BASE_ADDRESS (&Map[Index].Attribute)) & IA32_MAP_ATTRIBUTE_PAGE_TABLE_BASE_ADDRESS_MASK;
break;
}
}
//
// Assume every entry in maps does not overlap with each other
//
for (Index = 0; Index < InitMapCount; Index++) {
if ((Address >= InitMap[Index].LinearAddress) && (Address < (InitMap[Index].LinearAddress + InitMap[Index].Length))) {
AttributeInInitMap.Uint64 = (InitMap[Index].Attribute.Uint64 & mSupportedBit.Uint64);
AttributeInInitMap.Uint64 &= (~IA32_MAP_ATTRIBUTE_PAGE_TABLE_BASE_ADDRESS_MASK);
AttributeInInitMap.Uint64 |= (Address - InitMap[Index].LinearAddress + IA32_MAP_ATTRIBUTE_PAGE_TABLE_BASE_ADDRESS (&InitMap[Index].Attribute)) & IA32_MAP_ATTRIBUTE_PAGE_TABLE_BASE_ADDRESS_MASK;
break;
}
}
AttributeInMapEntrys.Uint64 = AttributeInInitMap.Uint64;
for (Index = MapEntrys->InitCount; Index < MapEntrys->Count; Index++) {
if ((Address >= MapEntrys->Maps[Index].LinearAddress) && (Address < (MapEntrys->Maps[Index].LinearAddress + MapEntrys->Maps[Index].Length))) {
if (AttributeInMapEntrys.Bits.Present == 0) {
AttributeInMapEntrys.Uint64 = 0;
MaskInMapEntrys.Uint64 = 0;
}
MaskInMapEntrys.Uint64 |= MapEntrys->Maps[Index].Mask.Uint64;
AttributeInMapEntrys.Uint64 &= (~MapEntrys->Maps[Index].Mask.Uint64);
AttributeInMapEntrys.Uint64 |= (MapEntrys->Maps[Index].Attribute.Uint64 & MapEntrys->Maps[Index].Mask.Uint64);
if (IA32_MAP_ATTRIBUTE_PAGE_TABLE_BASE_ADDRESS (&MapEntrys->Maps[Index].Mask) != 0) {
AttributeInMapEntrys.Uint64 &= (~IA32_MAP_ATTRIBUTE_PAGE_TABLE_BASE_ADDRESS_MASK);
AttributeInMapEntrys.Uint64 |= (Address - MapEntrys->Maps[Index].LinearAddress + IA32_MAP_ATTRIBUTE_PAGE_TABLE_BASE_ADDRESS (&MapEntrys->Maps[Index].Attribute)) & IA32_MAP_ATTRIBUTE_PAGE_TABLE_BASE_ADDRESS_MASK;
}
}
}
if (AttributeInMap.Bits.Present == 0) {
if (AttributeInMapEntrys.Bits.Present == 0) {
return TRUE;
}
}
if ((AttributeInMap.Uint64 & MaskInMapEntrys.Uint64) != (AttributeInMapEntrys.Uint64 & MaskInMapEntrys.Uint64)) {
DEBUG ((DEBUG_INFO, "======detailed information begin=====\n"));
DEBUG ((DEBUG_INFO, "\nError: Detect different attribute on a point with linear address: 0x%lx\n", Address));
DEBUG ((DEBUG_INFO, "By parsing page table, the point has Attribute 0x%lx, and map to physical address 0x%lx\n", IA32_MAP_ATTRIBUTE_ATTRIBUTES (&AttributeInMap) & MaskInMapEntrys.Uint64, IA32_MAP_ATTRIBUTE_PAGE_TABLE_BASE_ADDRESS (&AttributeInMap)));
DEBUG ((DEBUG_INFO, "While according to inputs, the point should Attribute 0x%lx, and should map to physical address 0x%lx\n", IA32_MAP_ATTRIBUTE_ATTRIBUTES (&AttributeInMapEntrys) & MaskInMapEntrys.Uint64, IA32_MAP_ATTRIBUTE_PAGE_TABLE_BASE_ADDRESS (&AttributeInMapEntrys)));
DEBUG ((DEBUG_INFO, "The total Mask is 0x%lx\n", MaskInMapEntrys.Uint64));
if (MapEntrys->InitCount != 0) {
DEBUG ((DEBUG_INFO, "Below is the initialization status:\n"));
for (Index = 0; Index < InitMapCount; Index++) {
if ((Address >= InitMap[Index].LinearAddress) && (Address < (InitMap[Index].LinearAddress + InitMap[Index].Length))) {
DEBUG ((DEBUG_INFO, " *"));
} else {
DEBUG ((DEBUG_INFO, " "));
}
DEBUG ((DEBUG_INFO, " %02d: {0x%lx, 0x%lx, 0x%lx}\n", Index, InitMap[Index].LinearAddress, InitMap[Index].LinearAddress + InitMap[Index].Length, InitMap[Index].Attribute.Uint64));
}
}
DEBUG ((DEBUG_INFO, "Below is the inputs:\n"));
DEBUG ((DEBUG_INFO, " Index: {LinearAddress, LinearLimit, Mask, Attribute}\n"));
for (Index = MapEntrys->InitCount; Index < MapEntrys->Count; Index++) {
if ((Address >= MapEntrys->Maps[Index].LinearAddress) && (Address < (MapEntrys->Maps[Index].LinearAddress + MapEntrys->Maps[Index].Length))) {
DEBUG ((DEBUG_INFO, " *"));
} else {
DEBUG ((DEBUG_INFO, " "));
}
DEBUG ((
DEBUG_INFO,
" %02d: {0x%lx, 0x%lx, 0x%lx,0x%lx}\n",
Index,
MapEntrys->Maps[Index].LinearAddress,
MapEntrys->Maps[Index].LinearAddress + MapEntrys->Maps[Index].Length,
MapEntrys->Maps[Index].Mask.Uint64,
MapEntrys->Maps[Index].Attribute.Uint64
));
}
DEBUG ((DEBUG_INFO, "Below is the dumped from pagetable:\n"));
for (Index = 0; Index < MapCount; Index++) {
if ((Address >= Map[Index].LinearAddress) && (Address < (Map[Index].LinearAddress + Map[Index].Length))) {
DEBUG ((DEBUG_INFO, " *"));
} else {
DEBUG ((DEBUG_INFO, " "));
}
DEBUG ((DEBUG_INFO, "%02d: {0x%lx, 0x%lx, 0x%lx}\n", Index, Map[Index].LinearAddress, Map[Index].LinearAddress + Map[Index].Length, Map[Index].Attribute.Uint64));
}
DEBUG ((DEBUG_INFO, "======detailed information done=====\n"));
return FALSE;
}
return TRUE;
}
/**
Append key point of a given address to Buffer
if buffer is NULL, only count needed count
@param[in, out] Buffer Buffer to contains all key point.
@param[in, out] Count Count of the key point.
@param[in] Address given address
**/
VOID
AppendKeyPointToBuffer (
IN OUT UINT64 *Buffer,
IN OUT UINTN *Count,
IN UINT64 Address
)
{
if ( Buffer != NULL) {
Buffer[*Count] = Address;
(*Count)++;
Buffer[*Count] = Address+1;
(*Count)++;
Buffer[*Count] = Address-1;
(*Count)++;
} else {
(*Count) = (*Count) +3;
}
}
/**
Get all key points from a buffer
if buffer is NULL, only count needed count
@param[in] MapEntrys Record every memory ranges that is used as input
@param[in] Map Pointer to an array that describes multiple linear address ranges.
@param[in] MapCount Pointer to a UINTN that hold the actual number of entries in the Map.
@param[in, out] Buffer Buffer to contains all key point.
@param[in, out] Count Count of the key point.
**/
VOID
GetKeyPointList (
IN MAP_ENTRYS *MapEntrys,
IN IA32_MAP_ENTRY *Map,
IN UINTN MapCount,
IN OUT UINT64 *Buffer,
IN OUT UINTN *Count
)
{
UINTN TemCount;
UINTN Index1;
UINTN Index2;
TemCount = 0;
for (Index1 = 0; Index1 < MapEntrys->Count; Index1++) {
AppendKeyPointToBuffer (Buffer, &TemCount, MapEntrys->Maps[Index1].LinearAddress);
AppendKeyPointToBuffer (Buffer, &TemCount, MapEntrys->Maps[Index1].LinearAddress + MapEntrys->Maps[Index1].Length);
}
for (Index2 = 0; Index2 < MapCount; Index2++) {
if (Buffer != NULL) {
for (Index1 = 0; Index1 < TemCount; Index1++) {
if (Buffer[Index1] == Map[Index2].LinearAddress) {
break;
}
}
if (Index1 < TemCount) {
continue;
}
}
AppendKeyPointToBuffer (Buffer, &TemCount, Map[Index2].LinearAddress);
}
for (Index2 = 0; Index2 < MapCount; Index2++) {
if (Buffer != NULL) {
for (Index1 = 0; Index1 < TemCount; Index1++) {
if (Buffer[Index1] == (Map[Index2].LinearAddress + Map[Index2].Length)) {
break;
}
}
if (Index1 < TemCount) {
continue;
}
}
AppendKeyPointToBuffer (Buffer, &TemCount, Map[Index2].LinearAddress + Map[Index2].Length);
}
*Count = TemCount;
}
/**
Generate random one range with randome attribute, and add it into pagetable
Compare the key point has same attribute
@param[in, out] PageTable The pointer to the page table to update, or pointer to NULL if a new page table is to be created.
@param[in] PagingMode The paging mode.
@param[in] MaxAddress Max Address.
@param[in] MapEntrys Record every memory ranges that is used as input
@param[in] PagesRecord Used to record memory usage for page table.
@param[in] InitMap Pointer to an array that describes init map entries.
@param[in] InitMapCount Pointer to a UINTN that hold the number of init map entries.
@retval UNIT_TEST_PASSED The test is successful.
**/
UNIT_TEST_STATUS
SingleMapEntryTest (
IN OUT UINTN *PageTable,
IN PAGING_MODE PagingMode,
IN UINT64 MaxAddress,
IN MAP_ENTRYS *MapEntrys,
IN ALLOCATE_PAGE_RECORDS *PagesRecord,
IN IA32_MAP_ENTRY *InitMap,
IN UINTN InitMapCount
)
{
UINTN MapsIndex;
RETURN_STATUS Status;
UINTN PageTableBufferSize;
VOID *Buffer;
IA32_MAP_ENTRY *Map;
UINTN MapCount;
IA32_MAP_ENTRY *Map2;
UINTN MapCount2;
UINTN Index;
UINTN KeyPointCount;
UINTN NewKeyPointCount;
UINT64 *KeyPointBuffer;
UINTN Level;
UINT64 Value;
UNIT_TEST_STATUS TestStatus;
MAP_ENTRY *LastMapEntry;
IA32_MAP_ATTRIBUTE *Mask;
IA32_MAP_ATTRIBUTE *Attribute;
UINT64 LastNotPresentRegionStart;
BOOLEAN IsNotPresent;
BOOLEAN IsModified;
MapsIndex = MapEntrys->Count;
MapCount = 0;
LastNotPresentRegionStart = 0;
IsNotPresent = FALSE;
IsModified = FALSE;
GenerateSingleRandomMapEntry (MaxAddress, MapEntrys);
LastMapEntry = &MapEntrys->Maps[MapsIndex];
Status = PageTableParse (*PageTable, PagingMode, NULL, &MapCount);
if (MapCount != 0) {
UT_ASSERT_EQUAL (Status, RETURN_BUFFER_TOO_SMALL);
Map = AllocatePages (EFI_SIZE_TO_PAGES (MapCount * sizeof (IA32_MAP_ENTRY)));
ASSERT (Map != NULL);
Status = PageTableParse (*PageTable, PagingMode, Map, &MapCount);
}
//
// Check if the generated MapEntrys->Maps[MapsIndex] contains not-present range.
//
if (LastMapEntry->Length > 0) {
for (Index = 0; Index < MapCount; Index++) {
if ((LastNotPresentRegionStart < Map[Index].LinearAddress) &&
(LastMapEntry->LinearAddress < Map[Index].LinearAddress) && (LastMapEntry->LinearAddress + LastMapEntry->Length > LastNotPresentRegionStart))
{
//
// MapEntrys->Maps[MapsIndex] contains not-present range in exsiting page table.
//
break;
}
LastNotPresentRegionStart = Map[Index].LinearAddress + Map[Index].Length;
}
//
// Either LastMapEntry overlaps with the not-present region in the very end
// Or it overlaps with one in the middle
if (LastNotPresentRegionStart < LastMapEntry->LinearAddress + LastMapEntry->Length) {
IsNotPresent = TRUE;
}
}
PageTableBufferSize = 0;
Status = PageTableMap (
PageTable,
PagingMode,
NULL,
&PageTableBufferSize,
LastMapEntry->LinearAddress,
LastMapEntry->Length,
&LastMapEntry->Attribute,
&LastMapEntry->Mask,
&IsModified
);
Attribute = &LastMapEntry->Attribute;
Mask = &LastMapEntry->Mask;
//
// If set [LinearAddress, LinearAddress+Attribute] to not preset, all
// other attributes should not be provided.
//
if ((LastMapEntry->Length > 0) && (Attribute->Bits.Present == 0) && (Mask->Bits.Present == 1) && (Mask->Uint64 > 1)) {
RemoveLastMapEntry (MapEntrys);
UT_ASSERT_EQUAL (Status, RETURN_INVALID_PARAMETER);
return UNIT_TEST_PASSED;
}
//
// Return Status for non-present range also should be InvalidParameter when:
// 1. Some of attributes are not provided when mapping non-present range to present.
// 2. Set any other attribute without setting the non-present range to Present.
//
if (IsNotPresent) {
if ((Mask->Bits.Present == 1) && (Attribute->Bits.Present == 1)) {
//
// Creating new page table or remapping non-present range to present.
//
if ((Mask->Bits.ReadWrite == 0) || (Mask->Bits.UserSupervisor == 0) || (Mask->Bits.WriteThrough == 0) || (Mask->Bits.CacheDisabled == 0) ||
(Mask->Bits.Accessed == 0) || (Mask->Bits.Dirty == 0) || (Mask->Bits.Pat == 0) || (Mask->Bits.Global == 0) ||
((Mask->Bits.PageTableBaseAddressLow == 0) && (Mask->Bits.PageTableBaseAddressHigh == 0)) || (Mask->Bits.ProtectionKey == 0) || (Mask->Bits.Nx == 0))
{
RemoveLastMapEntry (MapEntrys);
UT_ASSERT_EQUAL (Status, RETURN_INVALID_PARAMETER);
return UNIT_TEST_PASSED;
}
} else if ((Mask->Bits.Present == 0) && (Mask->Uint64 > 1)) {
//
// Only change other attributes for non-present range is not permitted.
//
RemoveLastMapEntry (MapEntrys);
UT_ASSERT_EQUAL (Status, RETURN_INVALID_PARAMETER);
return UNIT_TEST_PASSED;
}
}
if (PageTableBufferSize != 0) {
UT_ASSERT_EQUAL (Status, RETURN_BUFFER_TOO_SMALL);
//
// Allocate memory for Page table
// Note the memory is used in one complete Random test.
//
Buffer = PagesRecord->AllocatePagesForPageTable (PagesRecord, EFI_SIZE_TO_PAGES (PageTableBufferSize));
UT_ASSERT_NOT_EQUAL (Buffer, NULL);
Status = PageTableMap (
PageTable,
PagingMode,
Buffer,
&PageTableBufferSize,
LastMapEntry->LinearAddress,
LastMapEntry->Length,
&LastMapEntry->Attribute,
&LastMapEntry->Mask,
&IsModified
);
}
if (Status != RETURN_SUCCESS ) {
UT_ASSERT_EQUAL (Status, RETURN_SUCCESS);
}
UT_ASSERT_EQUAL (Status, RETURN_SUCCESS);
TestStatus = IsPageTableValid (*PageTable, PagingMode);
if (TestStatus != UNIT_TEST_PASSED) {
return TestStatus;
}
MapCount2 = 0;
Status = PageTableParse (*PageTable, PagingMode, NULL, &MapCount2);
if (MapCount2 != 0) {
UT_ASSERT_EQUAL (Status, RETURN_BUFFER_TOO_SMALL);
//
// Allocate memory for Map2
// Note the memory is only used in this one Single MapEntry Test
//
Map2 = AllocatePages (EFI_SIZE_TO_PAGES (MapCount2 * sizeof (IA32_MAP_ENTRY)));
ASSERT (Map2 != NULL);
Status = PageTableParse (*PageTable, PagingMode, Map2, &MapCount2);
}
//
// Check if PageTable has been modified.
//
if (MapCount2 != MapCount) {
UT_ASSERT_EQUAL (IsModified, TRUE);
} else {
if (CompareMem (Map, Map2, MapCount2 * sizeof (IA32_MAP_ENTRY)) != 0) {
UT_ASSERT_EQUAL (IsModified, TRUE);
} else {
UT_ASSERT_EQUAL (IsModified, FALSE);
}
}
UT_ASSERT_EQUAL (Status, RETURN_SUCCESS);
//
// Allocate memory to record all key point
// Note the memory is only used in this one Single MapEntry Test
//
KeyPointCount = 0;
GetKeyPointList (MapEntrys, Map2, MapCount2, NULL, &KeyPointCount);
KeyPointBuffer = AllocatePages (EFI_SIZE_TO_PAGES (KeyPointCount * sizeof (UINT64)));
ASSERT (KeyPointBuffer != NULL);
NewKeyPointCount = 0;
GetKeyPointList (MapEntrys, Map2, MapCount2, KeyPointBuffer, &NewKeyPointCount);
//
// Compare all key point's attribute
//
for (Index = 0; Index < NewKeyPointCount; Index++) {
if (!CompareEntrysforOnePoint (KeyPointBuffer[Index], MapEntrys, Map2, MapCount2, InitMap, InitMapCount)) {
DEBUG ((DEBUG_INFO, "Error happens at below key point\n"));
DEBUG ((DEBUG_INFO, "Index = %d KeyPointBuffer[Index] = 0x%lx\n", Index, KeyPointBuffer[Index]));
Value = GetEntryFromPageTable (*PageTable, PagingMode, KeyPointBuffer[Index], &Level);
DEBUG ((DEBUG_INFO, "From Page table, this key point is in level %d entry, with entry value is 0x%lx\n", Level, Value));
UT_ASSERT_TRUE (FALSE);
}
}
FreePages (KeyPointBuffer, EFI_SIZE_TO_PAGES (KeyPointCount * sizeof (UINT64)));
if (MapCount != 0) {
FreePages (Map, EFI_SIZE_TO_PAGES (MapCount * sizeof (IA32_MAP_ENTRY)));
}
if (MapCount2 != 0) {
FreePages (Map2, EFI_SIZE_TO_PAGES (MapCount2 * sizeof (IA32_MAP_ENTRY)));
}
return UNIT_TEST_PASSED;
}
/**
Allocate page and record the information in PagesRecord
@param[in] PagesRecord Point to a struct to record memory usage
@param[in] Pages Page count needed to allocate
@return A pointer to the allocated buffer or NULL if allocation fails.
**/
VOID *
EFIAPI
RecordAllocatePages (
IN ALLOCATE_PAGE_RECORDS *PagesRecord,
IN UINTN Pages
)
{
VOID *Buffer;
Buffer = NULL;
if (PagesRecord->Count < PagesRecord->MaxCount) {
Buffer = AllocatePages (Pages);
PagesRecord->Records[PagesRecord->Count].Buffer = Buffer;
PagesRecord->Records[PagesRecord->Count].Pages = Pages;
PagesRecord->Count++;
}
ASSERT (Buffer != NULL);
return Buffer;
}
/**
The function is a whole Random test, it will call SingleMapEntryTest for ExpctedEntryNumber times
@param[in] ExpctedEntryNumber The count of random entry
@param[in] PagingMode The paging mode.
@retval UNIT_TEST_PASSED The test is successful.
**/
UNIT_TEST_STATUS
MultipleMapEntryTest (
IN UINTN ExpctedEntryNumber,
IN PAGING_MODE PagingMode
)
{
UINTN PageTable;
UINT64 MaxAddress;
MAP_ENTRYS *MapEntrys;
ALLOCATE_PAGE_RECORDS *PagesRecord;
UINTN Index;
UNIT_TEST_STATUS TestStatus;
RETURN_STATUS Status;
IA32_MAP_ENTRY *InitMap;
UINTN InitMapCount;
MaxAddress = GetMaxAddress (PagingMode);
PageTable = 0;
MapEntrys = AllocatePages (EFI_SIZE_TO_PAGES (1000*sizeof (MAP_ENTRY) + sizeof (MAP_ENTRYS)));
ASSERT (MapEntrys != NULL);
MapEntrys->Count = 0;
MapEntrys->InitCount = 0;
MapEntrys->MaxCount = 1000;
PagesRecord = AllocatePages (EFI_SIZE_TO_PAGES (1000*sizeof (ALLOCATE_PAGE_RECORD) + sizeof (ALLOCATE_PAGE_RECORDS)));
ASSERT (PagesRecord != NULL);
PagesRecord->Count = 0;
PagesRecord->MaxCount = 1000;
PagesRecord->AllocatePagesForPageTable = RecordAllocatePages;
if (mRandomOption & MANUAL_CHANGE_PAGE_TABLE) {
ExpctedEntryNumber = ExpctedEntryNumber/2;
}
for (Index = 0; Index < ExpctedEntryNumber; Index++) {
TestStatus = SingleMapEntryTest (
&PageTable,
PagingMode,
MaxAddress,
MapEntrys,
PagesRecord,
NULL,
0
);
if (TestStatus != UNIT_TEST_PASSED) {
return TestStatus;
}
}
if ((mRandomOption & MANUAL_CHANGE_PAGE_TABLE) != 0) {
MapEntrys->InitCount = ExpctedEntryNumber;
TestStatus = ValidateAndRandomeModifyPageTable (PageTable, PagingMode);
RandomNumber = 0;
if (TestStatus != UNIT_TEST_PASSED) {
return TestStatus;
}
InitMapCount = 0;
Status = PageTableParse (PageTable, PagingMode, NULL, &InitMapCount);
if (InitMapCount != 0) {
UT_ASSERT_EQUAL (Status, RETURN_BUFFER_TOO_SMALL);
//
// Allocate memory for Maps
// Note the memory is only used in this one Single MapEntry Test
//
InitMap = AllocatePages (EFI_SIZE_TO_PAGES (InitMapCount * sizeof (IA32_MAP_ENTRY)));
ASSERT (InitMap != NULL);
Status = PageTableParse (PageTable, PagingMode, InitMap, &InitMapCount);
}
UT_ASSERT_EQUAL (Status, RETURN_SUCCESS);
for (Index = 0; Index < ExpctedEntryNumber; Index++) {
TestStatus = SingleMapEntryTest (
&PageTable,
PagingMode,
MaxAddress,
MapEntrys,
PagesRecord,
InitMap,
InitMapCount
);
if (TestStatus != UNIT_TEST_PASSED) {
return TestStatus;
}
}
if (InitMapCount != 0) {
FreePages (InitMap, EFI_SIZE_TO_PAGES (InitMapCount*sizeof (IA32_MAP_ENTRY)));
}
}
FreePages (
MapEntrys,
EFI_SIZE_TO_PAGES (1000*sizeof (MAP_ENTRY) + sizeof (MAP_ENTRYS))
);
for (Index = 0; Index < PagesRecord->Count; Index++) {
FreePages (PagesRecord->Records[Index].Buffer, PagesRecord->Records[Index].Pages);
}
FreePages (PagesRecord, EFI_SIZE_TO_PAGES (1000*sizeof (ALLOCATE_PAGE_RECORD) + sizeof (ALLOCATE_PAGE_RECORDS)));
return UNIT_TEST_PASSED;
}
/**
Random Test
@param[in] Context [Optional] An optional parameter that enables:
1) test-case reuse with varied parameters and
2) test-case re-entry for Target tests that need a
reboot. This parameter is a VOID* and it is the
responsibility of the test author to ensure that the
contents are well understood by all test cases that may
consume it.
@retval UNIT_TEST_PASSED The Unit test has completed and the test
case was successful.
@retval UNIT_TEST_ERROR_TEST_FAILED A test case assertion has failed.
**/
UNIT_TEST_STATUS
EFIAPI
TestCaseforRandomTest (
IN UNIT_TEST_CONTEXT Context
)
{
UNIT_TEST_STATUS Status;
UINTN Index;
UT_ASSERT_EQUAL (RandomSeed (NULL, 0), TRUE);
UT_ASSERT_EQUAL (Random32 (100, 100), 100);
UT_ASSERT_EQUAL (Random64 (100, 100), 100);
UT_ASSERT_TRUE ((Random32 (9, 10) >= 9) & (Random32 (9, 10) <= 10));
UT_ASSERT_TRUE ((Random64 (9, 10) >= 9) & (Random64 (9, 10) <= 10));
mSupportedBit.Uint64 = 0;
mSupportedBit.Bits.Present = 1;
mSupportedBit.Bits.ReadWrite = 1;
mSupportedBit.Bits.UserSupervisor = 1;
mSupportedBit.Bits.WriteThrough = 1;
mSupportedBit.Bits.CacheDisabled = 1;
mSupportedBit.Bits.Accessed = 1;
mSupportedBit.Bits.Dirty = 1;
mSupportedBit.Bits.Pat = 1;
mSupportedBit.Bits.Global = 1;
mSupportedBit.Bits.ProtectionKey = 0xF;
mSupportedBit.Bits.Nx = 1;
mRandomOption = ((CPU_PAGE_TABLE_LIB_RANDOM_TEST_CONTEXT *)Context)->RandomOption;
mNumberIndex = 0;
for (Index = 0; Index < ((CPU_PAGE_TABLE_LIB_RANDOM_TEST_CONTEXT *)Context)->TestCount; Index++) {
Status = MultipleMapEntryTest (
((CPU_PAGE_TABLE_LIB_RANDOM_TEST_CONTEXT *)Context)->TestRangeCount,
((CPU_PAGE_TABLE_LIB_RANDOM_TEST_CONTEXT *)Context)->PagingMode
);
if (Status != UNIT_TEST_PASSED) {
return Status;
}
DEBUG ((DEBUG_INFO, "."));
}
DEBUG ((DEBUG_INFO, "\n"));
return UNIT_TEST_PASSED;
}
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