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From: "PierreGondois" <pierre.gondois@arm.com>
To: devel@edk2.groups.io
Cc: Ard Biesheuvel <ardb+tianocore@kernel.org>,
	Leif Lindholm <quic_llindhol@quicinc.com>,
	Sami Mujawar <sami.mujawar@arm.com>,
	Michael D Kinney <michael.d.kinney@intel.com>,
	Liming Gao <gaoliming@byosoft.com.cn>
Subject: [edk2-devel] [PATCH v3 10/11] DynamicTablesPkg: Add DynamicTablesScmiInfoLib
Date: Tue, 21 Nov 2023 17:50:06 +0100	[thread overview]
Message-ID: <20231121165007.1546858-11-pierre.gondois@arm.com> (raw)
In-Reply-To: <20231121165007.1546858-1-pierre.gondois@arm.com>

The SCP holds some power information that could be advertised
through the _CPC object. The communication with the SCP is done
through SCMI protocols (c.f. ArmScmiDxe).

Use the SCMI protocols to query information and feed it to
the DynamicTablesPkg.

Signed-off-by: Pierre Gondois <pierre.gondois@arm.com>
---
 DynamicTablesPkg/DynamicTables.dsc.inc        |   1 +
 DynamicTablesPkg/DynamicTablesPkg.dec         |   3 +
 DynamicTablesPkg/DynamicTablesPkg.dsc         |   1 +
 .../Library/DynamicTablesScmiInfoLib.h        |  33 ++
 .../DynamicTablesScmiInfoLib.c                | 297 ++++++++++++++++++
 .../DynamicTablesScmiInfoLib.inf              |  31 ++
 6 files changed, 366 insertions(+)
 create mode 100644 DynamicTablesPkg/Include/Library/DynamicTablesScmiInfoLib.h
 create mode 100644 DynamicTablesPkg/Library/DynamicTablesScmiInfoLib/DynamicTablesScmiInfoLib.c
 create mode 100644 DynamicTablesPkg/Library/DynamicTablesScmiInfoLib/DynamicTablesScmiInfoLib.inf

diff --git a/DynamicTablesPkg/DynamicTables.dsc.inc b/DynamicTablesPkg/DynamicTables.dsc.inc
index 9d4312c4e87d..41947012b92b 100644
--- a/DynamicTablesPkg/DynamicTables.dsc.inc
+++ b/DynamicTablesPkg/DynamicTables.dsc.inc
@@ -15,6 +15,7 @@ [BuildOptions]
 [LibraryClasses.common]
   AcpiHelperLib|DynamicTablesPkg/Library/Common/AcpiHelperLib/AcpiHelperLib.inf
   AmlLib|DynamicTablesPkg/Library/Common/AmlLib/AmlLib.inf
+  DynamicTablesScmiInfoLib|DynamicTablesPkg/Library/DynamicTablesScmiInfoLib/DynamicTablesScmiInfoLib.inf
   SsdtPcieSupportLib|DynamicTablesPkg/Library/Common/SsdtPcieSupportLib/SsdtPcieSupportLib.inf
   SsdtSerialPortFixupLib|DynamicTablesPkg/Library/Common/SsdtSerialPortFixupLib/SsdtSerialPortFixupLib.inf
   TableHelperLib|DynamicTablesPkg/Library/Common/TableHelperLib/TableHelperLib.inf
diff --git a/DynamicTablesPkg/DynamicTablesPkg.dec b/DynamicTablesPkg/DynamicTablesPkg.dec
index cfbcbb9569f1..aa422ce9f6fd 100644
--- a/DynamicTablesPkg/DynamicTablesPkg.dec
+++ b/DynamicTablesPkg/DynamicTablesPkg.dec
@@ -42,6 +42,9 @@ [LibraryClasses]
   ##  @libraryclass  Defines a set of SMBIOS string helper methods.
   SmbiosStringTableLib|Include/Library/SmbiosStringTableLib.h
 
+  ##  @libraryclass  Defines a set of APIs to populate CmObj using SCMI.
+  DynamicTablesScmiInfoLib|Include/Library/DynamicTablesScmiInfoLib.h
+
 [Protocols]
   # Configuration Manager Protocol GUID
   gEdkiiConfigurationManagerProtocolGuid = { 0xd85a4835, 0x5a82, 0x4894, { 0xac, 0x2, 0x70, 0x6f, 0x43, 0xd5, 0x97, 0x8e } }
diff --git a/DynamicTablesPkg/DynamicTablesPkg.dsc b/DynamicTablesPkg/DynamicTablesPkg.dsc
index bd5084a9008f..853ea2a1e4c2 100644
--- a/DynamicTablesPkg/DynamicTablesPkg.dsc
+++ b/DynamicTablesPkg/DynamicTablesPkg.dsc
@@ -39,6 +39,7 @@ [LibraryClasses.ARM, LibraryClasses.AARCH64]
   PL011UartLib|ArmPlatformPkg/Library/PL011UartLib/PL011UartLib.inf
 
 [Components.common]
+  DynamicTablesPkg/Library/DynamicTablesScmiInfoLib/DynamicTablesScmiInfoLib.inf
   DynamicTablesPkg/Library/Common/AcpiHelperLib/AcpiHelperLib.inf
   DynamicTablesPkg/Library/Common/AmlLib/AmlLib.inf
   DynamicTablesPkg/Library/Common/SsdtPcieSupportLib/SsdtPcieSupportLib.inf
diff --git a/DynamicTablesPkg/Include/Library/DynamicTablesScmiInfoLib.h b/DynamicTablesPkg/Include/Library/DynamicTablesScmiInfoLib.h
new file mode 100644
index 000000000000..ff6b47d51fe8
--- /dev/null
+++ b/DynamicTablesPkg/Include/Library/DynamicTablesScmiInfoLib.h
@@ -0,0 +1,33 @@
+/** @file
+  Arm SCMI Info Library.
+
+  Copyright (c) 2022 - 2023, Arm Limited. All rights reserved.<BR>
+
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+**/
+
+#ifndef ARM_SCMI_INFO_LIB_H_
+#define ARM_SCMI_INFO_LIB_H_
+
+#include <ConfigurationManagerObject.h>
+
+/** Populate a AML_CPC_INFO object based on SCMI information.
+
+  @param[in]  DomainId    Identifier for the performance domain.
+  @param[out] CpcInfo     If success, this structure was populated from
+                          information queried to the SCP.
+
+  @retval EFI_SUCCESS             Success.
+  @retval EFI_DEVICE_ERROR        Device error.
+  @retval EFI_INVALID_PARAMETER   Invalid parameter.
+  @retval EFI_TIMEOUT             Time out.
+  @retval EFI_UNSUPPORTED         Unsupported.
+**/
+EFI_STATUS
+EFIAPI
+DynamicTablesScmiInfoGetFastChannel (
+  IN  UINT32        DomainId,
+  OUT AML_CPC_INFO  *CpcInfo
+  );
+
+#endif // ARM_SCMI_INFO_LIB_H_
diff --git a/DynamicTablesPkg/Library/DynamicTablesScmiInfoLib/DynamicTablesScmiInfoLib.c b/DynamicTablesPkg/Library/DynamicTablesScmiInfoLib/DynamicTablesScmiInfoLib.c
new file mode 100644
index 000000000000..b59da3d6bb51
--- /dev/null
+++ b/DynamicTablesPkg/Library/DynamicTablesScmiInfoLib/DynamicTablesScmiInfoLib.c
@@ -0,0 +1,297 @@
+/** @file
+  Arm SCMI Info Library.
+
+  Copyright (c) 2022 - 2023, Arm Limited. All rights reserved.<BR>
+
+  Arm Functional Fixed Hardware Specification:
+  - https://developer.arm.com/documentation/den0048/latest/
+
+  SPDX-License-Identifier: BSD-2-Clause-Patent
+**/
+
+#include <Library/AcpiLib.h>
+#include <Library/DynamicTablesScmiInfoLib.h>
+#include <Library/DebugLib.h>
+#include <Library/MemoryAllocationLib.h>
+#include <Library/UefiBootServicesTableLib.h>
+#include <Protocol/ArmScmi.h>
+#include <Protocol/ArmScmiPerformanceProtocol.h>
+
+/** Arm FFH registers
+
+  Cf. Arm Functional Fixed Hardware Specification
+  s3.2 Performance management and Collaborative Processor Performance Control
+*/
+#define ARM_FFH_DELIVERED_PERF_COUNTER_REGISTER  0x0
+#define ARM_FFH_REFERENCE_PERF_COUNTER_REGISTER  0x1
+
+/// Arm SCMI performance protocol.
+STATIC SCMI_PERFORMANCE_PROTOCOL  *ScmiPerfProtocol;
+
+/** Arm SCMI Info Library constructor.
+
+  @param  ImageHandle   Image of the loaded driver.
+  @param  SystemTable   Pointer to the System Table.
+
+  @retval EFI_SUCCESS             Success.
+  @retval EFI_DEVICE_ERROR        Device error.
+  @retval EFI_INVALID_PARAMETER   Invalid parameter.
+  @retval EFI_NOT_FOUND           Not Found
+  @retval EFI_TIMEOUT             Timeout.
+  @retval EFI_UNSUPPORTED         Unsupported.
+**/
+EFI_STATUS
+EFIAPI
+DynamicTablesScmiInfoLibConstructor (
+  IN  EFI_HANDLE        ImageHandle,
+  IN  EFI_SYSTEM_TABLE  *SystemTable
+  )
+{
+  EFI_STATUS  Status;
+  UINT32      Version;
+
+  Status = gBS->LocateProtocol (
+                  &gArmScmiPerformanceProtocolGuid,
+                  NULL,
+                  (VOID **)&ScmiPerfProtocol
+                  );
+  if (EFI_ERROR (Status)) {
+    return Status;
+  }
+
+  Status = ScmiPerfProtocol->GetVersion (ScmiPerfProtocol, &Version);
+  if (EFI_ERROR (Status)) {
+    return Status;
+  }
+
+  // FastChannels were added in SCMI v2.0 spec.
+  if (Version < PERFORMANCE_PROTOCOL_VERSION_V2) {
+    DEBUG ((
+      DEBUG_ERROR,
+      "DynamicTablesScmiInfoLib requires SCMI version > 2.0\n"
+      ));
+    return EFI_UNSUPPORTED;
+  }
+
+  return Status;
+}
+
+/** Get the OPPs/performance states of a power domain.
+
+  This function is a wrapper around the SCMI PERFORMANCE_DESCRIBE_LEVELS
+  command. The list of discrete performance states is returned in a buffer
+  that must be freed by the caller.
+
+  @param[in]  DomainId        Identifier for the performance domain.
+  @param[out] LevelArray      If success, pointer to the list of list of
+                              performance state. This memory must be freed by
+                              the caller.
+  @param[out] LevelArrayCount If success, contains the number of states in
+                              LevelArray.
+
+  @retval EFI_SUCCESS             Success.
+  @retval EFI_DEVICE_ERROR        Device error.
+  @retval EFI_INVALID_PARAMETER   Invalid parameter.
+  @retval EFI_TIMEOUT             Time out.
+  @retval EFI_UNSUPPORTED         Unsupported.
+**/
+STATIC
+EFI_STATUS
+EFIAPI
+DynamicTablesScmiInfoDescribeLevels (
+  IN  UINT32                  DomainId,
+  OUT SCMI_PERFORMANCE_LEVEL  **LevelArray,
+  OUT UINT32                  *LevelArrayCount
+  )
+{
+  EFI_STATUS              Status;
+  SCMI_PERFORMANCE_LEVEL  *Array;
+  UINT32                  Count;
+  UINT32                  Size;
+
+  if ((ScmiPerfProtocol == NULL)  ||
+      (LevelArray == NULL)  ||
+      (LevelArrayCount == NULL))
+  {
+    return EFI_INVALID_PARAMETER;
+  }
+
+  // First call to get the number of levels.
+  Size   = 0;
+  Status = ScmiPerfProtocol->DescribeLevels (
+                               ScmiPerfProtocol,
+                               DomainId,
+                               &Count,
+                               &Size,
+                               NULL
+                               );
+  if (Status != EFI_BUFFER_TOO_SMALL) {
+    // EFI_SUCCESS is not a valid option.
+    if (Status == EFI_SUCCESS) {
+      return EFI_INVALID_PARAMETER;
+    } else {
+      return Status;
+    }
+  }
+
+  Array = AllocateZeroPool (Size);
+  if (Array == NULL) {
+    return EFI_OUT_OF_RESOURCES;
+  }
+
+  // Second call to get the descriptions of the levels.
+  Status = ScmiPerfProtocol->DescribeLevels (
+                               ScmiPerfProtocol,
+                               DomainId,
+                               &Count,
+                               &Size,
+                               Array
+                               );
+  if (EFI_ERROR (Status)) {
+    return Status;
+  }
+
+  *LevelArray      = Array;
+  *LevelArrayCount = Count;
+
+  return Status;
+}
+
+/** Populate a AML_CPC_INFO object based on SCMI information.
+
+  @param[in]  DomainId    Identifier for the performance domain.
+  @param[out] CpcInfo     If success, this structure was populated from
+                          information queried to the SCP.
+
+  @retval EFI_SUCCESS             Success.
+  @retval EFI_DEVICE_ERROR        Device error.
+  @retval EFI_INVALID_PARAMETER   Invalid parameter.
+  @retval EFI_TIMEOUT             Time out.
+  @retval EFI_UNSUPPORTED         Unsupported.
+**/
+EFI_STATUS
+EFIAPI
+DynamicTablesScmiInfoGetFastChannel (
+  IN  UINT32        DomainId,
+  OUT AML_CPC_INFO  *CpcInfo
+  )
+{
+  EFI_STATUS                          Status;
+  SCMI_PERFORMANCE_FASTCHANNEL        FcLevelGet;
+  SCMI_PERFORMANCE_FASTCHANNEL        FcLimitsSet;
+  SCMI_PERFORMANCE_DOMAIN_ATTRIBUTES  DomainAttributes;
+
+  SCMI_PERFORMANCE_LEVEL  *LevelArray;
+  UINT32                  LevelCount;
+
+  UINT64  FcLevelGetAddr;
+  UINT64  FcLimitsMaxSetAddr;
+  UINT64  FcLimitsMinSetAddr;
+
+  if ((ScmiPerfProtocol == NULL)  ||
+      (CpcInfo == NULL))
+  {
+    return EFI_INVALID_PARAMETER;
+  }
+
+  Status = ScmiPerfProtocol->DescribeFastchannel (
+                               ScmiPerfProtocol,
+                               DomainId,
+                               ScmiMessageIdPerformanceLevelSet,
+                               &FcLevelGet
+                               );
+  if (EFI_ERROR (Status)) {
+    return Status;
+  }
+
+  Status = ScmiPerfProtocol->DescribeFastchannel (
+                               ScmiPerfProtocol,
+                               DomainId,
+                               ScmiMessageIdPerformanceLimitsSet,
+                               &FcLimitsSet
+                               );
+  if (EFI_ERROR (Status)) {
+    return Status;
+  }
+
+  Status = ScmiPerfProtocol->GetDomainAttributes (
+                               ScmiPerfProtocol,
+                               DomainId,
+                               &DomainAttributes
+                               );
+  if (EFI_ERROR (Status)) {
+    return Status;
+  }
+
+  Status = DynamicTablesScmiInfoDescribeLevels (DomainId, &LevelArray, &LevelCount);
+  if (EFI_ERROR (Status)) {
+    return Status;
+  }
+
+  /* Do some safety checks.
+     Only support FastChannels (and not doorbells) as this is
+     the only mechanism supported by SCP.
+     FcLimits[Get|Set] require 2 UINT32 values (max, then min) and
+     FcLimits[Get|Set] require 1 UINT32 value (level).
+  */
+  if ((FcLevelGet.ChanSize != sizeof (UINT32))  ||
+      ((FcLevelGet.Attributes & SCMI_PERF_FC_ATTRIB_HAS_DOORBELL) ==
+       SCMI_PERF_FC_ATTRIB_HAS_DOORBELL) ||
+      (FcLimitsSet.ChanSize != 2 * sizeof (UINT32)) ||
+      ((FcLimitsSet.Attributes & SCMI_PERF_FC_ATTRIB_HAS_DOORBELL) ==
+       SCMI_PERF_FC_ATTRIB_HAS_DOORBELL))
+  {
+    Status = EFI_INVALID_PARAMETER;
+    goto exit_handler;
+  }
+
+  FcLevelGetAddr = ((UINT64)FcLevelGet.ChanAddrHigh << 32) |
+                   FcLevelGet.ChanAddrLow;
+  FcLimitsMaxSetAddr = ((UINT64)FcLimitsSet.ChanAddrHigh << 32) |
+                       FcLimitsSet.ChanAddrLow;
+  FcLimitsMinSetAddr = FcLimitsMaxSetAddr + 0x4;
+
+  CpcInfo->Revision                          = EFI_ACPI_6_5_AML_CPC_REVISION_V3;
+  CpcInfo->HighestPerformanceInteger         = LevelArray[LevelCount - 1].Level;
+  CpcInfo->NominalPerformanceInteger         = DomainAttributes.SustainedPerfLevel;
+  CpcInfo->LowestNonlinearPerformanceInteger = LevelArray[0].Level;
+  CpcInfo->LowestPerformanceInteger          = LevelArray[0].Level;
+
+  CpcInfo->DesiredPerformanceRegister.AddressSpaceId    = EFI_ACPI_6_5_SYSTEM_MEMORY;
+  CpcInfo->DesiredPerformanceRegister.RegisterBitWidth  = 32;
+  CpcInfo->DesiredPerformanceRegister.RegisterBitOffset = 0;
+  CpcInfo->DesiredPerformanceRegister.AccessSize        = EFI_ACPI_6_5_DWORD;
+  CpcInfo->DesiredPerformanceRegister.Address           = FcLevelGetAddr;
+
+  CpcInfo->MinimumPerformanceRegister.AddressSpaceId    = EFI_ACPI_6_5_SYSTEM_MEMORY;
+  CpcInfo->MinimumPerformanceRegister.RegisterBitWidth  = 32;
+  CpcInfo->MinimumPerformanceRegister.RegisterBitOffset = 0;
+  CpcInfo->MinimumPerformanceRegister.AccessSize        = EFI_ACPI_6_5_DWORD;
+  CpcInfo->MinimumPerformanceRegister.Address           = FcLimitsMinSetAddr;
+
+  CpcInfo->MaximumPerformanceRegister.AddressSpaceId    = EFI_ACPI_6_5_SYSTEM_MEMORY;
+  CpcInfo->MaximumPerformanceRegister.RegisterBitWidth  = 32;
+  CpcInfo->MaximumPerformanceRegister.RegisterBitOffset = 0;
+  CpcInfo->MaximumPerformanceRegister.AccessSize        = EFI_ACPI_6_5_DWORD;
+  CpcInfo->MaximumPerformanceRegister.Address           = FcLimitsMaxSetAddr;
+
+  CpcInfo->ReferencePerformanceCounterRegister.AddressSpaceId    = EFI_ACPI_6_5_FUNCTIONAL_FIXED_HARDWARE;
+  CpcInfo->ReferencePerformanceCounterRegister.RegisterBitWidth  = 0x40;
+  CpcInfo->ReferencePerformanceCounterRegister.RegisterBitOffset = 0;
+  CpcInfo->ReferencePerformanceCounterRegister.AccessSize        = ARM_FFH_REFERENCE_PERF_COUNTER_REGISTER;
+  CpcInfo->ReferencePerformanceCounterRegister.Address           = 0x4;
+
+  CpcInfo->DeliveredPerformanceCounterRegister.AddressSpaceId    = EFI_ACPI_6_5_FUNCTIONAL_FIXED_HARDWARE;
+  CpcInfo->DeliveredPerformanceCounterRegister.RegisterBitWidth  = 0x40;
+  CpcInfo->DeliveredPerformanceCounterRegister.RegisterBitOffset = 0;
+  CpcInfo->DeliveredPerformanceCounterRegister.AccessSize        = ARM_FFH_DELIVERED_PERF_COUNTER_REGISTER;
+  CpcInfo->DeliveredPerformanceCounterRegister.Address           = 0x4;
+
+  // SCMI should advertise performance values on a unified scale. So frequency
+  // values are not available. LowestFrequencyInteger and
+  // NominalFrequencyInteger are populated in the ConfigurationManager.
+
+exit_handler:
+  FreePool (LevelArray);
+  return Status;
+}
diff --git a/DynamicTablesPkg/Library/DynamicTablesScmiInfoLib/DynamicTablesScmiInfoLib.inf b/DynamicTablesPkg/Library/DynamicTablesScmiInfoLib/DynamicTablesScmiInfoLib.inf
new file mode 100644
index 000000000000..d49277f82bc3
--- /dev/null
+++ b/DynamicTablesPkg/Library/DynamicTablesScmiInfoLib/DynamicTablesScmiInfoLib.inf
@@ -0,0 +1,31 @@
+## @file
+#  Arm SCMI Info Library.
+#
+#  Copyright (c) 2022 - 2023, Arm Limited. All rights reserved.
+#
+#  SPDX-License-Identifier: BSD-2-Clause-Patent
+##
+
+[Defines]
+  INF_VERSION    = 0x0001001B
+  BASE_NAME      = DynamicTablesScmiInfoLib
+  FILE_GUID      = 1A7CDB04-9FFC-40DA-A87C-A5ACADAF8136
+  VERSION_STRING = 1.0
+  MODULE_TYPE    = DXE_DRIVER
+  LIBRARY_CLASS  = DynamicTablesScmiInfoLib
+  CONSTRUCTOR    = DynamicTablesScmiInfoLibConstructor
+
+[Sources]
+  DynamicTablesScmiInfoLib.c
+
+[Packages]
+  ArmPkg/ArmPkg.dec
+  DynamicTablesPkg/DynamicTablesPkg.dec
+  EmbeddedPkg/EmbeddedPkg.dec
+  MdePkg/MdePkg.dec
+
+[Protocols]
+  gArmScmiPerformanceProtocolGuid   ## CONSUMES
+
+[Depex]
+  gArmScmiPerformanceProtocolGuid
-- 
2.25.1



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  parent reply	other threads:[~2023-11-21 16:50 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-11-21 16:49 [edk2-devel] [PATCH v3 00/11] DynamicTablesPkg: Enable _PSD/_CPC generation using SCMI PierreGondois
2023-11-21 16:49 ` [edk2-devel] [PATCH v3 01/11] ArmPkg/ArmScmiDxe: Rename PERFORMANCE_PROTOCOL_VERSION PierreGondois
2023-11-21 17:02   ` Leif Lindholm
2023-11-21 16:49 ` [edk2-devel] [PATCH v3 02/11] ArmPkg/ArmScmiDxe: Add PERFORMANCE_DESCRIBE_FASTCHANNEL support PierreGondois
2023-11-21 16:49 ` [edk2-devel] [PATCH v3 03/11] MdePkg/Acpi65: Add _PSD/_CPC/State Coordination Types macros PierreGondois
2023-11-22  0:03   ` Ni, Ray
2023-11-22  7:54     ` PierreGondois
2023-11-27  8:36       ` PierreGondois
2023-11-30  1:07         ` Ni, Ray
2023-11-21 16:50 ` [edk2-devel] [PATCH v3 04/11] DynamicTablesPkg: Use new CPC revision macro PierreGondois
2023-11-21 16:50 ` [edk2-devel] [PATCH v3 05/11] DynamicTablesPkg: Rename AmlCpcInfo.h to AcpiObjects.h PierreGondois
2023-11-21 16:50 ` [edk2-devel] [PATCH v3 06/11] DynamicTablesPkg: Add CM_ARM_PSD_INFO object PierreGondois
2023-11-21 16:50 ` [edk2-devel] [PATCH v3 07/11] DynamicTablesPkg: Add PsdToken field to CM_ARM_GICC_INFO object PierreGondois
2023-11-21 16:50 ` [edk2-devel] [PATCH v3 08/11] DynamicTablesPkg: Add AmlCreatePsdNode() to generate _PSD PierreGondois
2023-11-21 16:50 ` [edk2-devel] [PATCH v3 09/11] DynamicTablesPkg: Generate _PSD in SsdtCpuTopologyGenerator PierreGondois
2023-11-21 16:50 ` PierreGondois [this message]
2023-11-21 17:05   ` [edk2-devel] [PATCH v3 10/11] DynamicTablesPkg: Add DynamicTablesScmiInfoLib Leif Lindholm
2023-11-21 16:50 ` [edk2-devel] [PATCH v3 11/11] DynamicTablesPkg: Remove check for _CPC field PierreGondois

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