[edk2-devel] [Patch V2 0/2] Change the usage of input parameter ProcessorNumber in MpInitLibGetProcessorInfo() of MpInitLibUp

[edk2-devel] [Patch V2 0/2] Change the usage of input parameter ProcessorNumber in MpInitLibGetProcessorInfo() of MpInitLibUp

[duntan]

In the V2 patch set:
In "set EXTENDED_PROCESSOR_INFORMATION to 0", set EXTENDED_PROCESSOR_INFORMATION to 0 in API MpInitLibGetProcessorInfo() of MpInitLibUp. This commit use ZeroMem() to set all fileds in output EFI_PROCESSOR_INFORMATION to 0 before StatusFlag field is reassigned.

In "Check lower 24 bits of ProcessorNumber", use BIT24 instead of CPU_V2_EXTENDED_TOPOLOGY to clearly tell that processor number only occupies the lower 24 bits.

Dun Tan (2):
  UefiCpuPkg: set EXTENDED_PROCESSOR_INFORMATION to 0
  UefiCpuPkg: Check lower 24 bits of ProcessorNumber

 UefiCpuPkg/Include/Library/MpInitLib.h       |  2 ++
 UefiCpuPkg/Library/MpInitLib/MpLib.c         |  2 ++
 UefiCpuPkg/Library/MpInitLibUp/MpInitLibUp.c | 19 +++++++++++--------
 3 files changed, 15 insertions(+), 8 deletions(-)

-- 
2.31.1.windows.1



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[edk2-devel] [Patch V2 1/2] UefiCpuPkg: set EXTENDED_PROCESSOR_INFORMATION to 0

[duntan]

Set EXTENDED_PROCESSOR_INFORMATION to 0 in API
MpInitLibGetProcessorInfo() of MpInitLibUp. This
commit use ZeroMem() to set all fileds in output
EFI_PROCESSOR_INFORMATION to 0 before StatusFlag
field is reassigned.

Previously EXTENDED_PROCESSOR_INFORMATION in the API
MpInitLibGetProcessorInfo() of MpInitLibUp is ignored.
In PEI/DXE MpInitLib, EXTENDED_PROCESSOR_INFORMATION
will be retrived when BIT24 of input ProcessorNumber
is set. This commit can avoid garbage in the output
structure in MpInitLibGetProcessorInfo() of MpInitLibUp.

Signed-off-by: Dun Tan <dun.tan@intel.com>
Cc: Ray Ni <ray.ni@intel.com>
Cc: Laszlo Ersek <lersek@redhat.com>
Cc: Rahul Kumar <rahul1.kumar@intel.com>
Cc: Gerd Hoffmann <kraxel@redhat.com>
Cc: Min Xu <min.m.xu@intel.com>
---
 UefiCpuPkg/Include/Library/MpInitLib.h       |  2 ++
 UefiCpuPkg/Library/MpInitLib/MpLib.c         |  2 ++
 UefiCpuPkg/Library/MpInitLibUp/MpInitLibUp.c | 14 +++++++-------
 3 files changed, 11 insertions(+), 7 deletions(-)

diff --git a/UefiCpuPkg/Include/Library/MpInitLib.h b/UefiCpuPkg/Include/Library/MpInitLib.h
index 1853c46415..842c6f7ff9 100644
--- a/UefiCpuPkg/Include/Library/MpInitLib.h
+++ b/UefiCpuPkg/Include/Library/MpInitLib.h
@@ -63,6 +63,8 @@ MpInitLibGetNumberOfProcessors (
   instant this call is made. This service may only be called from the BSP.
 
   @param[in]  ProcessorNumber       The handle number of processor.
+                                    Lower 24 bits contains the actual processor number.
+                                    BIT24 indicates if the EXTENDED_PROCESSOR_INFORMATION will be retrived.
   @param[out] ProcessorInfoBuffer   A pointer to the buffer where information for
                                     the requested processor is deposited.
   @param[out] HealthData            Return processor health data.
diff --git a/UefiCpuPkg/Library/MpInitLib/MpLib.c b/UefiCpuPkg/Library/MpInitLib/MpLib.c
index a359906923..cdfb570e61 100644
--- a/UefiCpuPkg/Library/MpInitLib/MpLib.c
+++ b/UefiCpuPkg/Library/MpInitLib/MpLib.c
@@ -2333,6 +2333,8 @@ MpInitLibInitialize (
   instant this call is made. This service may only be called from the BSP.
 
   @param[in]  ProcessorNumber       The handle number of processor.
+                                    Lower 24 bits contains the actual processor number.
+                                    BIT24 indicates if the EXTENDED_PROCESSOR_INFORMATION will be retrived.
   @param[out] ProcessorInfoBuffer   A pointer to the buffer where information for
                                     the requested processor is deposited.
   @param[out]  HealthData            Return processor health data.
diff --git a/UefiCpuPkg/Library/MpInitLibUp/MpInitLibUp.c b/UefiCpuPkg/Library/MpInitLibUp/MpInitLibUp.c
index 86f9fbf903..ea9a45c9c6 100644
--- a/UefiCpuPkg/Library/MpInitLibUp/MpInitLibUp.c
+++ b/UefiCpuPkg/Library/MpInitLibUp/MpInitLibUp.c
@@ -77,6 +77,8 @@ MpInitLibGetNumberOfProcessors (
   instant this call is made. This service may only be called from the BSP.
 
   @param[in]  ProcessorNumber       The handle number of processor.
+                                    Lower 24 bits contains the actual processor number.
+                                    BIT24 indicates if the EXTENDED_PROCESSOR_INFORMATION will be retrived.
   @param[out] ProcessorInfoBuffer   A pointer to the buffer where information for
                                     the requested processor is deposited.
   @param[out] HealthData            Return processor health data.
@@ -108,13 +110,11 @@ MpInitLibGetProcessorInfo (
     return EFI_NOT_FOUND;
   }
 
-  ProcessorInfoBuffer->ProcessorId = 0;
-  ProcessorInfoBuffer->StatusFlag  = PROCESSOR_AS_BSP_BIT  |
-                                     PROCESSOR_ENABLED_BIT |
-                                     PROCESSOR_HEALTH_STATUS_BIT;
-  ProcessorInfoBuffer->Location.Package = 0;
-  ProcessorInfoBuffer->Location.Core    = 0;
-  ProcessorInfoBuffer->Location.Thread  = 0;
+  ZeroMem (ProcessorInfoBuffer, sizeof (*ProcessorInfoBuffer));
+  ProcessorInfoBuffer->StatusFlag = PROCESSOR_AS_BSP_BIT  |
+                                    PROCESSOR_ENABLED_BIT |
+                                    PROCESSOR_HEALTH_STATUS_BIT;
+
   if (HealthData != NULL) {
     GuidHob = GetFirstGuidHob (&gEfiSecPlatformInformationPpiGuid);
     if (GuidHob != NULL) {
-- 
2.31.1.windows.1



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[edk2-devel] [Patch V2 2/2] UefiCpuPkg: Check lower 24 bits of ProcessorNumber

[duntan]

Check lower 24 bits of ProcessorNumber instead of
the value of ProcessorNumber in the API
MpInitLibGetProcessorInfo() of MpInitLibUp instance.
Lower 24 bits of ProcessorNumber contains the actual
processor number.
The BIT24 of input ProcessorNumber might be set to
indicate if the EXTENDED_PROCESSOR_INFORMATION will
be retrived.

Signed-off-by: Dun Tan <dun.tan@intel.com>
Cc: Ray Ni <ray.ni@intel.com>
Cc: Laszlo Ersek <lersek@redhat.com>
Cc: Rahul Kumar <rahul1.kumar@intel.com>
Cc: Gerd Hoffmann <kraxel@redhat.com>
Cc: Min Xu <min.m.xu@intel.com>
---
 UefiCpuPkg/Library/MpInitLibUp/MpInitLibUp.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/UefiCpuPkg/Library/MpInitLibUp/MpInitLibUp.c b/UefiCpuPkg/Library/MpInitLibUp/MpInitLibUp.c
index ea9a45c9c6..30bdd8cfdd 100644
--- a/UefiCpuPkg/Library/MpInitLibUp/MpInitLibUp.c
+++ b/UefiCpuPkg/Library/MpInitLibUp/MpInitLibUp.c
@@ -106,7 +106,10 @@ MpInitLibGetProcessorInfo (
     return EFI_INVALID_PARAMETER;
   }
 
-  if (ProcessorNumber != 0) {
+  //
+  // Lower 24 bits contains the actual processor number.
+  //
+  if ((ProcessorNumber & (BIT24 - 1)) != 0) {
     return EFI_NOT_FOUND;
   }
 
-- 
2.31.1.windows.1



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Re: [edk2-devel] [Patch V2 0/2] Change the usage of input parameter ProcessorNumber in MpInitLibGetProcessorInfo() of MpInitLibUp

[Laszlo Ersek]

On 1/8/24 04:55, duntan wrote:
> In the V2 patch set:
> In "set EXTENDED_PROCESSOR_INFORMATION to 0", set EXTENDED_PROCESSOR_INFORMATION to 0 in API MpInitLibGetProcessorInfo() of MpInitLibUp. This commit use ZeroMem() to set all fileds in output EFI_PROCESSOR_INFORMATION to 0 before StatusFlag field is reassigned.
> 
> In "Check lower 24 bits of ProcessorNumber", use BIT24 instead of CPU_V2_EXTENDED_TOPOLOGY to clearly tell that processor number only occupies the lower 24 bits.
> 
> Dun Tan (2):
>   UefiCpuPkg: set EXTENDED_PROCESSOR_INFORMATION to 0
>   UefiCpuPkg: Check lower 24 bits of ProcessorNumber
> 
>  UefiCpuPkg/Include/Library/MpInitLib.h       |  2 ++
>  UefiCpuPkg/Library/MpInitLib/MpLib.c         |  2 ++
>  UefiCpuPkg/Library/MpInitLibUp/MpInitLibUp.c | 19 +++++++++++--------
>  3 files changed, 15 insertions(+), 8 deletions(-)
> 

Reviewed-by: Laszlo Ersek <lersek@redhat.com>



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