diff options
Diffstat (limited to 'UefiCpuPkg')
-rw-r--r-- | UefiCpuPkg/Include/Library/MtrrLib.h | 10 | ||||
-rw-r--r-- | UefiCpuPkg/Library/MtrrLib/MtrrLib.c | 10 |
2 files changed, 20 insertions, 0 deletions
diff --git a/UefiCpuPkg/Include/Library/MtrrLib.h b/UefiCpuPkg/Include/Library/MtrrLib.h index d56f1057e1..f82c27ea0c 100644 --- a/UefiCpuPkg/Include/Library/MtrrLib.h +++ b/UefiCpuPkg/Include/Library/MtrrLib.h @@ -157,6 +157,11 @@ GetFirmwareVariableMtrrCount ( @retval RETURN_OUT_OF_RESOURCES There are not enough system resources to
modify the attributes of the memory
resource range.
+ Multiple memory range attributes setting by calling this API multiple
+ times may fail with status RETURN_OUT_OF_RESOURCES. It may not mean
+ the number of CPU MTRRs are too small to set such memory attributes.
+ Pass the multiple memory range attributes to one call of
+ MtrrSetMemoryAttributesInMtrrSettings() may succeed.
@retval RETURN_BUFFER_TOO_SMALL The fixed internal scratch buffer is too small for MTRR calculation.
Caller should use MtrrSetMemoryAttributesInMtrrSettings() to specify
external scratch buffer.
@@ -354,6 +359,11 @@ MtrrGetDefaultMemoryType ( BaseAddress and Length cannot be modified.
@retval RETURN_OUT_OF_RESOURCES There are not enough system resources to modify the attributes of
the memory resource range.
+ Multiple memory range attributes setting by calling this API multiple
+ times may fail with status RETURN_OUT_OF_RESOURCES. It may not mean
+ the number of CPU MTRRs are too small to set such memory attributes.
+ Pass the multiple memory range attributes to one call of
+ MtrrSetMemoryAttributesInMtrrSettings() may succeed.
@retval RETURN_BUFFER_TOO_SMALL The fixed internal scratch buffer is too small for MTRR calculation.
Caller should use MtrrSetMemoryAttributesInMtrrSettings() to specify
external scratch buffer.
diff --git a/UefiCpuPkg/Library/MtrrLib/MtrrLib.c b/UefiCpuPkg/Library/MtrrLib/MtrrLib.c index 2496d08ad4..dfce9a996b 100644 --- a/UefiCpuPkg/Library/MtrrLib/MtrrLib.c +++ b/UefiCpuPkg/Library/MtrrLib/MtrrLib.c @@ -2513,6 +2513,11 @@ Exit: BaseAddress and Length cannot be modified.
@retval RETURN_OUT_OF_RESOURCES There are not enough system resources to modify the attributes of
the memory resource range.
+ Multiple memory range attributes setting by calling this API multiple
+ times may fail with status RETURN_OUT_OF_RESOURCES. It may not mean
+ the number of CPU MTRRs are too small to set such memory attributes.
+ Pass the multiple memory range attributes to one call of
+ MtrrSetMemoryAttributesInMtrrSettings() may succeed.
@retval RETURN_BUFFER_TOO_SMALL The fixed internal scratch buffer is too small for MTRR calculation.
Caller should use MtrrSetMemoryAttributesInMtrrSettings() to specify
external scratch buffer.
@@ -2561,6 +2566,11 @@ MtrrSetMemoryAttributeInMtrrSettings ( @retval RETURN_OUT_OF_RESOURCES There are not enough system resources to
modify the attributes of the memory
resource range.
+ Multiple memory range attributes setting by calling this API multiple
+ times may fail with status RETURN_OUT_OF_RESOURCES. It may not mean
+ the number of CPU MTRRs are too small to set such memory attributes.
+ Pass the multiple memory range attributes to one call of
+ MtrrSetMemoryAttributesInMtrrSettings() may succeed.
@retval RETURN_BUFFER_TOO_SMALL The fixed internal scratch buffer is too small for MTRR calculation.
Caller should use MtrrSetMemoryAttributesInMtrrSettings() to specify
external scratch buffer.
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