Hi Chris,
Thank you for this patch.
Please see my feedback below inline marked [SAMI].
Regards,
Sami Mujawar
On 08/12/2021 04:06 PM, Chris Jones wrote:
Bugzilla: 3697 (https://bugzilla.tianocore.org/show_bug.cgi?id=3697)
Update the PPTT generator with the CacheId field as defined in table
5.140 of the ACPI 6.4 specification.
Also add validations to ensure that the cache id generated is unique.
Signed-off-by: Chris Jones <christopher.jo...@arm.com>
---
DynamicTablesPkg/Include/ArmNameSpaceObjects.h | 4 +-
DynamicTablesPkg/Library/Acpi/Arm/AcpiPpttLibArm/PpttGenerator.c | 102
++++++++++++++++++--
2 files changed, 96 insertions(+), 10 deletions(-)
diff --git a/DynamicTablesPkg/Include/ArmNameSpaceObjects.h
b/DynamicTablesPkg/Include/ArmNameSpaceObjects.h
index
3246e8884723ac85340bf880a3859800726be3c1..6ea03fca487b96577b8fd8105bc3d22047ff5697
100644
--- a/DynamicTablesPkg/Include/ArmNameSpaceObjects.h
+++ b/DynamicTablesPkg/Include/ArmNameSpaceObjects.h
@@ -741,10 +741,12 @@ typedef struct CmArmCacheInfo {
/// PPTT_ARM_CCIDX_CACHE_ASSOCIATIVITY_MAX. Therfore this field
/// is 32-bit wide.
UINT32 Associativity;
- /// Cache attributes (ACPI 6.3 - January 2019, PPTT, Table 5-156)
+ /// Cache attributes (ACPI 6.4 - January 2021, PPTT, Table 5.140)
UINT8 Attributes;
/// Line size in bytes
UINT16 LineSize;
+ /// Unique ID for the cache
+ UINT32 CacheId;
} CM_ARM_CACHE_INFO;
/** A structure that describes a reference to another Configuration Manager
diff --git a/DynamicTablesPkg/Library/Acpi/Arm/AcpiPpttLibArm/PpttGenerator.c
b/DynamicTablesPkg/Library/Acpi/Arm/AcpiPpttLibArm/PpttGenerator.c
index
3d416ca78ec16a1929ede87abbe4f8f4464ef0cf..6b74572ea2dd8478f14d013e6cb7394216e45d8d
100644
--- a/DynamicTablesPkg/Library/Acpi/Arm/AcpiPpttLibArm/PpttGenerator.c
+++ b/DynamicTablesPkg/Library/Acpi/Arm/AcpiPpttLibArm/PpttGenerator.c
@@ -726,6 +726,35 @@ AddProcHierarchyNodes (
return Status;
}
+/**
+ Test whether CacheId is unique among the CacheIdList.
+
+ @param [in] CacheId Cache ID to check.
+ @param [in] CacheIdList List of already existing cache IDs.
+ @param [in] CacheIdListSize Size of CacheIdList.
+
+ @retval TRUE CacheId does not exist in CacheIdList.
+ @retval FALSE CacheId already exists in CacheIdList.
+**/
+STATIC
+BOOLEAN
+IsCacheIdUnique (
+ IN CONST UINT32 CacheId,
+ IN CONST UINT32 *CacheIdList,
+ IN CONST UINT32 CacheIdListSize
+ )
+{
+ UINT32 Index;
+
+ for (Index = 0; Index < CacheIdListSize; Index++) {
+ if (CacheIdList[Index] == CacheId) {
+ return FALSE;
+ }
+ }
+
+ return TRUE;
+}
+
/**
Update the Cache Type Structure (Type 1) information.
@@ -738,10 +767,12 @@ AddProcHierarchyNodes (
@param [in] Pptt Pointer to PPTT table structure.
@param [in] NodesStartOffset Offset from the start of PPTT table to the
start of Cache Type Structures.
+ @param [in] Revision Revision of the PPTT table being requested.
@retval EFI_SUCCESS Structures updated successfully.
@retval EFI_INVALID_PARAMETER A parameter is invalid.
@retval EFI_NOT_FOUND A required object was not found.
+ @retval EFI_OUT_OF_RESOURCES Out of resources.
**/
STATIC
EFI_STATUS
@@ -749,7 +780,8 @@ AddCacheTypeStructures (
IN CONST ACPI_PPTT_GENERATOR *CONST
Generator,
IN CONST EDKII_CONFIGURATION_MANAGER_PROTOCOL *CONST
CfgMgrProtocol,
IN CONST EFI_ACPI_6_4_PROCESSOR_PROPERTIES_TOPOLOGY_TABLE_HEADER *Pptt,
- IN CONST UINT32
NodesStartOffset
+ IN CONST UINT32
NodesStartOffset,
+ IN CONST UINT32 Revision
)
{
EFI_STATUS Status;
@@ -758,6 +790,9 @@ AddCacheTypeStructures (
CM_ARM_CACHE_INFO *CacheInfoNode;
PPTT_NODE_INDEXER *CacheNodeIterator;
UINT32 NodeCount;
+ BOOLEAN CacheIdUnique;
+ UINT32 TotalNodeCount;
[SAMI] I think we could do slight optimisation by doing the following below:
(a) change TotalNode Count to NodeIndex.
+ UINT32 *FoundCacheIds;
ASSERT (
(Generator != NULL) &&
@@ -770,6 +805,13 @@ AddCacheTypeStructures (
CacheNodeIterator = Generator->CacheStructIndexedList;
NodeCount = Generator->CacheStructCount;
+ TotalNodeCount = NodeCount;
+
+ FoundCacheIds = AllocateZeroPool (TotalNodeCount * sizeof (*FoundCacheIds));
[SAMI] (b) Change TotalNodeCount to NodeCount.
+ if (FoundCacheIds == NULL) {
+ DEBUG ((DEBUG_ERROR, "ERROR: PPTT: Failed to allocate resources.\n"));
+ return EFI_OUT_OF_RESOURCES;
+ }
while (NodeCount-- != 0) {
[SAMI] (c) Replace while loop to a for loop where NodeIndes = 0 to
NodeCount.
CacheInfoNode = (CM_ARM_CACHE_INFO *)CacheNodeIterator->Object;
@@ -789,6 +831,7 @@ AddCacheTypeStructures (
CacheStruct->Flags.CacheTypeValid = 1;
CacheStruct->Flags.WritePolicyValid = 1;
CacheStruct->Flags.LineSizeValid = 1;
+ CacheStruct->Flags.CacheIdValid = 1;
CacheStruct->Flags.Reserved = 0;
// Populate the reference to the next level of cache
@@ -811,7 +854,7 @@ AddCacheTypeStructures (
CacheInfoNode->Token,
Status
));
- return Status;
+ goto cleanup;
}
// Update Cache Structure with the offset for the next level of cache
@@ -835,7 +878,7 @@ AddCacheTypeStructures (
CacheInfoNode->NumberOfSets,
Status
));
- return Status;
+ goto cleanup;
}
if (CacheInfoNode->NumberOfSets > PPTT_ARM_CACHE_NUMBER_OF_SETS_MAX) {
@@ -862,7 +905,7 @@ AddCacheTypeStructures (
CacheInfoNode->Associativity,
Status
));
- return Status;
+ goto cleanup;
}
// Validate the Associativity field based on the architecture specification
@@ -881,7 +924,7 @@ AddCacheTypeStructures (
CacheInfoNode->Associativity,
Status
));
- return Status;
+ goto cleanup;
}
if (CacheInfoNode->Associativity > PPTT_ARM_CACHE_ASSOCIATIVITY_MAX) {
@@ -923,7 +966,7 @@ AddCacheTypeStructures (
CacheInfoNode->LineSize,
Status
));
- return Status;
+ goto cleanup;
}
if ((CacheInfoNode->LineSize & (CacheInfoNode->LineSize - 1)) != 0) {
@@ -935,18 +978,58 @@ AddCacheTypeStructures (
CacheInfoNode->LineSize,
Status
));
- return Status;
+ goto cleanup;
}
CacheStruct->LineSize = CacheInfoNode->LineSize;
+ if (Revision >= 3) {
+ // Validate and populate cache id
+ if (CacheInfoNode->CacheId == 0) {
+ Status = EFI_INVALID_PARAMETER;
+ DEBUG ((
+ DEBUG_ERROR,
+ "ERROR: PPTT: The cache id cannot be zero. Status = %r\n",
+ Status
+ ));
+ goto cleanup;
+ }
+
+ CacheIdUnique = IsCacheIdUnique (
+ CacheInfoNode->CacheId,
+ FoundCacheIds,
+ TotalNodeCount
[SAMI] (d) Replace TotalNodeCount with NodeIndex in call above.
By doing (a) to (d) and (e) below we can reduce the
number of iterations in IsCacheIdUnique ().
If you agree I will make the adjustments before pushing
this patch series.
[/SAMI]
+ );
+ if (!CacheIdUnique) {
+ Status = EFI_INVALID_PARAMETER;
+ DEBUG ((
+ DEBUG_ERROR,
+ "ERROR: PPTT: The cache id is not unique. " \
+ "CacheId = %d. Status = %r\n",
+ CacheInfoNode->CacheId,
+ Status
+ ));
+ goto cleanup;
+ }
+
+ // Store the cache id so we can check future cache ids for uniqueness
+ FoundCacheIds[NodeCount] = CacheInfoNode->CacheId;
[SAMI] (e) Replace NodeCount with NodeIndex above.
+
+ CacheStruct->CacheId = CacheInfoNode->CacheId;
+ }
+
// Next Cache Type Structure
CacheStruct = (EFI_ACPI_6_4_PPTT_STRUCTURE_CACHE *)((UINT8 *)CacheStruct +
CacheStruct->Length);
CacheNodeIterator++;
} // Cache Type Structure
- return EFI_SUCCESS;
+ Status = EFI_SUCCESS;
+
+cleanup:
+ FreePool (FoundCacheIds);
+
+ return Status;
}
/**
@@ -1205,7 +1288,8 @@ BuildPpttTable (
Generator,
CfgMgrProtocol,
Pptt,
- CacheStructOffset
+ CacheStructOffset,
+ AcpiTableInfo->AcpiTableRevision
);
if (EFI_ERROR (Status)) {
DEBUG ((
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