* [edk2-devel] [PATCH edk2-platforms 0/1] get rid of DeviceTree from SbsaQemu
@ 2024-01-15 15:11 Marcin Juszkiewicz
2024-01-15 15:11 ` [edk2-devel] [PATCH edk2-platforms 1/1] SbsaQemu: get cpu information from TF-A Marcin Juszkiewicz
0 siblings, 1 reply; 4+ messages in thread
From: Marcin Juszkiewicz @ 2024-01-15 15:11 UTC (permalink / raw)
To: devel; +Cc: Leif Lindholm, Ard Biesheuvel, Graeme Gregory, Marcin Juszkiewicz
We want to stop parsing DeviceTree to gather hardware information.
Instead we ask TF-A for those details using SMC calls. On real hardware
platform it could be asking on-board Embedded Controller.
If TF-A answer to SMC call would be not success then we assume that it
is old version and go back to parsing DeviceTree data directly. Just now
it is present in one place together with new code for handling SMC
stuff.
TF-A part: https://review.trustedfirmware.org/c/TF-A/trusted-firmware-a/+/25707
Marcin Juszkiewicz (1):
SbsaQemu: get cpu information from TF-A
Platform/Qemu/SbsaQemu/SbsaQemu.dsc | 4 +-
.../Qemu/SbsaQemu/OemMiscLib/OemMiscLib.inf | 6 +-
.../SbsaQemuAcpiDxe/SbsaQemuAcpiDxe.inf | 4 +-
.../SbsaQemuPlatformDxe.inf | 4 +-
.../Library/FdtHelperLib/FdtHelperLib.inf | 33 ---
.../Library/SbsaQemuSmc/SbsaQemuSmc.inf | 34 +++
.../Include/IndustryStandard/SbsaQemuSmc.h | 2 +
.../SbsaQemu/Include/Library/FdtHelperLib.h | 36 ----
.../SbsaQemu/Include/Library/SbsaQemuSmc.h | 45 ++++
.../Qemu/SbsaQemu/OemMiscLib/OemMiscLib.c | 10 +-
.../Drivers/SbsaQemuAcpiDxe/SbsaQemuAcpiDxe.c | 16 +-
.../SbsaQemuPlatformDxe/SbsaQemuPlatformDxe.c | 9 +-
.../Library/FdtHelperLib/FdtHelperLib.c | 98 ---------
.../Library/SbsaQemuSmc/SbsaQemuSmc.c | 204 ++++++++++++++++++
14 files changed, 308 insertions(+), 197 deletions(-)
delete mode 100644 Silicon/Qemu/SbsaQemu/Library/FdtHelperLib/FdtHelperLib.inf
create mode 100644 Silicon/Qemu/SbsaQemu/Library/SbsaQemuSmc/SbsaQemuSmc.inf
delete mode 100644 Silicon/Qemu/SbsaQemu/Include/Library/FdtHelperLib.h
create mode 100644 Silicon/Qemu/SbsaQemu/Include/Library/SbsaQemuSmc.h
delete mode 100644 Silicon/Qemu/SbsaQemu/Library/FdtHelperLib/FdtHelperLib.c
create mode 100644 Silicon/Qemu/SbsaQemu/Library/SbsaQemuSmc/SbsaQemuSmc.c
--
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* [edk2-devel] [PATCH edk2-platforms 1/1] SbsaQemu: get cpu information from TF-A
2024-01-15 15:11 [edk2-devel] [PATCH edk2-platforms 0/1] get rid of DeviceTree from SbsaQemu Marcin Juszkiewicz
@ 2024-01-15 15:11 ` Marcin Juszkiewicz
2024-01-15 18:02 ` Leif Lindholm
0 siblings, 1 reply; 4+ messages in thread
From: Marcin Juszkiewicz @ 2024-01-15 15:11 UTC (permalink / raw)
To: devel; +Cc: Leif Lindholm, Ard Biesheuvel, Graeme Gregory, Marcin Juszkiewicz
As part of removing DeviceTree use we moved cpu related parts to TF-A.
On EDK2 side we get values via SMC calls during platform initialization.
Handled are:
- get cpu cores count
- get MPIDR
- get NUMA node id
If too old TF-A is used then cpu count and MPIDR are read directly from
DeviceTree.
Signed-off-by: Marcin Juszkiewicz <marcin.juszkiewicz@linaro.org>
---
Platform/Qemu/SbsaQemu/SbsaQemu.dsc | 4 +-
.../Qemu/SbsaQemu/OemMiscLib/OemMiscLib.inf | 6 +-
.../SbsaQemuAcpiDxe/SbsaQemuAcpiDxe.inf | 4 +-
.../SbsaQemuPlatformDxe.inf | 4 +-
.../Library/FdtHelperLib/FdtHelperLib.inf | 33 ---
.../Library/SbsaQemuSmc/SbsaQemuSmc.inf | 34 +++
.../Include/IndustryStandard/SbsaQemuSmc.h | 2 +
.../SbsaQemu/Include/Library/FdtHelperLib.h | 36 ----
.../SbsaQemu/Include/Library/SbsaQemuSmc.h | 45 ++++
.../Qemu/SbsaQemu/OemMiscLib/OemMiscLib.c | 10 +-
.../Drivers/SbsaQemuAcpiDxe/SbsaQemuAcpiDxe.c | 16 +-
.../SbsaQemuPlatformDxe/SbsaQemuPlatformDxe.c | 9 +-
.../Library/FdtHelperLib/FdtHelperLib.c | 98 ---------
.../Library/SbsaQemuSmc/SbsaQemuSmc.c | 204 ++++++++++++++++++
14 files changed, 308 insertions(+), 197 deletions(-)
delete mode 100644 Silicon/Qemu/SbsaQemu/Library/FdtHelperLib/FdtHelperLib.inf
create mode 100644 Silicon/Qemu/SbsaQemu/Library/SbsaQemuSmc/SbsaQemuSmc.inf
delete mode 100644 Silicon/Qemu/SbsaQemu/Include/Library/FdtHelperLib.h
create mode 100644 Silicon/Qemu/SbsaQemu/Include/Library/SbsaQemuSmc.h
delete mode 100644 Silicon/Qemu/SbsaQemu/Library/FdtHelperLib/FdtHelperLib.c
create mode 100644 Silicon/Qemu/SbsaQemu/Library/SbsaQemuSmc/SbsaQemuSmc.c
diff --git a/Platform/Qemu/SbsaQemu/SbsaQemu.dsc b/Platform/Qemu/SbsaQemu/SbsaQemu.dsc
index 378600050df9..231db11cb07b 100644
--- a/Platform/Qemu/SbsaQemu/SbsaQemu.dsc
+++ b/Platform/Qemu/SbsaQemu/SbsaQemu.dsc
@@ -1,6 +1,6 @@
#
# Copyright (c) 2021, NUVIA Inc. All rights reserved.
-# Copyright (c) 2019, Linaro Limited. All rights reserved.
+# Copyright (c) 2023, Linaro Ltd. All rights reserved.
#
# SPDX-License-Identifier: BSD-2-Clause-Patent
#
@@ -126,7 +126,7 @@ [LibraryClasses.common]
# ARM PL011 UART Driver
PL011UartLib|ArmPlatformPkg/Library/PL011UartLib/PL011UartLib.inf
- FdtHelperLib|Silicon/Qemu/SbsaQemu/Library/FdtHelperLib/FdtHelperLib.inf
+ SbsaQemuSmc|Silicon/Qemu/SbsaQemu/Library/SbsaQemuSmc/SbsaQemuSmc.inf
OemMiscLib|Platform/Qemu/SbsaQemu/OemMiscLib/OemMiscLib.inf
# Debug Support
diff --git a/Platform/Qemu/SbsaQemu/OemMiscLib/OemMiscLib.inf b/Platform/Qemu/SbsaQemu/OemMiscLib/OemMiscLib.inf
index a34f54d431d4..8e2bf8c512f1 100644
--- a/Platform/Qemu/SbsaQemu/OemMiscLib/OemMiscLib.inf
+++ b/Platform/Qemu/SbsaQemu/OemMiscLib/OemMiscLib.inf
@@ -3,7 +3,7 @@
#
# Copyright (c) 2021, NUVIA Inc. All rights reserved.
# Copyright (c) 2018, Hisilicon Limited. All rights reserved.
-# Copyright (c) 2018, Linaro Limited. All rights reserved.
+# Copyright (c) 2023, Linaro Ltd. All rights reserved.
#
# SPDX-License-Identifier: BSD-2-Clause-Patent
#
@@ -29,8 +29,6 @@ [Packages]
[LibraryClasses]
BaseMemoryLib
- FdtLib
- FdtHelperLib
IoLib
PcdLib
@@ -40,7 +38,6 @@ [Guids]
[Pcd]
gArmTokenSpaceGuid.PcdEmbeddedControllerFirmwareRelease
gArmTokenSpaceGuid.PcdSystemBiosRelease
- gArmVirtSbsaQemuPlatformTokenSpaceGuid.PcdDeviceTreeBaseAddress
gArmVirtSbsaQemuPlatformTokenSpaceGuid.PcdSystemManufacturer
gArmVirtSbsaQemuPlatformTokenSpaceGuid.PcdSystemSerialNumber
@@ -56,3 +53,4 @@ [Pcd]
gArmVirtSbsaQemuPlatformTokenSpaceGuid.PcdChassisManufacturer
gArmVirtSbsaQemuPlatformTokenSpaceGuid.PcdChassisAssetTag
gArmVirtSbsaQemuPlatformTokenSpaceGuid.PcdChassisSKU
+ gArmVirtSbsaQemuPlatformTokenSpaceGuid.PcdCoreCount
diff --git a/Silicon/Qemu/SbsaQemu/Drivers/SbsaQemuAcpiDxe/SbsaQemuAcpiDxe.inf b/Silicon/Qemu/SbsaQemu/Drivers/SbsaQemuAcpiDxe/SbsaQemuAcpiDxe.inf
index 291743b19115..d23b53586cd3 100644
--- a/Silicon/Qemu/SbsaQemu/Drivers/SbsaQemuAcpiDxe/SbsaQemuAcpiDxe.inf
+++ b/Silicon/Qemu/SbsaQemu/Drivers/SbsaQemuAcpiDxe/SbsaQemuAcpiDxe.inf
@@ -1,7 +1,7 @@
## @file
# This driver modifies ACPI tables for the Qemu SBSA platform
#
-# Copyright (c) 2020, Linaro Ltd. All rights reserved.
+# Copyright (c) Linaro Ltd. All rights reserved.
#
# SPDX-License-Identifier: BSD-2-Clause-Patent
#
@@ -35,9 +35,9 @@ [LibraryClasses]
BaseLib
DebugLib
DxeServicesLib
- FdtHelperLib
PcdLib
PrintLib
+ SbsaQemuSmc
UefiDriverEntryPoint
UefiLib
UefiRuntimeServicesTableLib
diff --git a/Silicon/Qemu/SbsaQemu/Drivers/SbsaQemuPlatformDxe/SbsaQemuPlatformDxe.inf b/Silicon/Qemu/SbsaQemu/Drivers/SbsaQemuPlatformDxe/SbsaQemuPlatformDxe.inf
index 19534b7a274a..c8203a6ffc47 100644
--- a/Silicon/Qemu/SbsaQemu/Drivers/SbsaQemuPlatformDxe/SbsaQemuPlatformDxe.inf
+++ b/Silicon/Qemu/SbsaQemu/Drivers/SbsaQemuPlatformDxe/SbsaQemuPlatformDxe.inf
@@ -1,7 +1,7 @@
## @file
# This driver effectuates SbsaQemu platform configuration settings
#
-# Copyright (c) 2019, Linaro Ltd. All rights reserved.
+# Copyright (c) Linaro Ltd. All rights reserved.
#
# SPDX-License-Identifier: BSD-2-Clause-Patent
#
@@ -32,6 +32,7 @@ [LibraryClasses]
PcdLib
DebugLib
NonDiscoverableDeviceRegistrationLib
+ SbsaQemuSmc
UefiDriverEntryPoint
[Pcd]
@@ -46,6 +47,7 @@ [Pcd]
gArmTokenSpaceGuid.PcdGicDistributorBase
gArmTokenSpaceGuid.PcdGicRedistributorsBase
gArmVirtSbsaQemuPlatformTokenSpaceGuid.PcdGicItsBase
+ gArmVirtSbsaQemuPlatformTokenSpaceGuid.PcdCoreCount
[Depex]
diff --git a/Silicon/Qemu/SbsaQemu/Library/FdtHelperLib/FdtHelperLib.inf b/Silicon/Qemu/SbsaQemu/Library/FdtHelperLib/FdtHelperLib.inf
deleted file mode 100644
index 9c059f3e5851..000000000000
--- a/Silicon/Qemu/SbsaQemu/Library/FdtHelperLib/FdtHelperLib.inf
+++ /dev/null
@@ -1,33 +0,0 @@
-#/** @file
-#
-# Component description file for FdtHelperLib module
-#
-# Copyright (c) 2021, NUVIA Inc. All rights reserved.
-#
-# SPDX-License-Identifier: BSD-2-Clause-Patent
-#
-#**/
-
-[Defines]
- INF_VERSION = 1.29
- BASE_NAME = FdtHelperLib
- FILE_GUID = 34e4396f-c2fc-4f9e-ad58-0f98e99e3875
- MODULE_TYPE = BASE
- VERSION_STRING = 1.0
- LIBRARY_CLASS = FdtHelperLib
-
-[Sources.common]
- FdtHelperLib.c
-
-[Packages]
- EmbeddedPkg/EmbeddedPkg.dec
- MdePkg/MdePkg.dec
- Silicon/Qemu/SbsaQemu/SbsaQemu.dec
-
-[LibraryClasses]
- DebugLib
- FdtLib
- PcdLib
-
-[FixedPcd]
- gArmVirtSbsaQemuPlatformTokenSpaceGuid.PcdDeviceTreeBaseAddress
diff --git a/Silicon/Qemu/SbsaQemu/Library/SbsaQemuSmc/SbsaQemuSmc.inf b/Silicon/Qemu/SbsaQemu/Library/SbsaQemuSmc/SbsaQemuSmc.inf
new file mode 100644
index 000000000000..a9d51d8871b0
--- /dev/null
+++ b/Silicon/Qemu/SbsaQemu/Library/SbsaQemuSmc/SbsaQemuSmc.inf
@@ -0,0 +1,34 @@
+#/* @file
+#
+# Copyright (c) Linaro Ltd. All rights reserved.
+#
+# SPDX-License-Identifier: BSD-2-Clause-Patent
+#
+#*/
+
+[Defines]
+ INF_VERSION = 0x0001001c
+ BASE_NAME = SbsaQemuSmc
+ FILE_GUID = 6454006f-6502-46e2-9be4-4bba8d4b29fb
+ MODULE_TYPE = BASE
+ VERSION_STRING = 1.0
+ LIBRARY_CLASS = ArmPlatformLib
+
+[Sources]
+ SbsaQemuSmc.c
+
+[Packages]
+ ArmPkg/ArmPkg.dec
+ EmbeddedPkg/EmbeddedPkg.dec
+ MdePkg/MdePkg.dec
+ Silicon/Qemu/SbsaQemu/SbsaQemu.dec
+
+[LibraryClasses]
+ ArmSmcLib
+ BaseMemoryLib
+ DebugLib
+ FdtLib
+
+ [Pcd]
+ gArmVirtSbsaQemuPlatformTokenSpaceGuid.PcdDeviceTreeBaseAddress
+ gArmVirtSbsaQemuPlatformTokenSpaceGuid.PcdCoreCount
diff --git a/Silicon/Qemu/SbsaQemu/Include/IndustryStandard/SbsaQemuSmc.h b/Silicon/Qemu/SbsaQemu/Include/IndustryStandard/SbsaQemuSmc.h
index 7934875e4aba..e33648ee1462 100644
--- a/Silicon/Qemu/SbsaQemu/Include/IndustryStandard/SbsaQemuSmc.h
+++ b/Silicon/Qemu/SbsaQemu/Include/IndustryStandard/SbsaQemuSmc.h
@@ -14,5 +14,7 @@
#define SIP_SVC_VERSION SMC_SIP_FUNCTION_ID(1)
#define SIP_SVC_GET_GIC SMC_SIP_FUNCTION_ID(100)
#define SIP_SVC_GET_GIC_ITS SMC_SIP_FUNCTION_ID(101)
+#define SIP_SVC_GET_CPU_COUNT SMC_SIP_FUNCTION_ID(200)
+#define SIP_SVC_GET_CPU_NODE SMC_SIP_FUNCTION_ID(201)
#endif /* SBSA_QEMU_SMC_H_ */
diff --git a/Silicon/Qemu/SbsaQemu/Include/Library/FdtHelperLib.h b/Silicon/Qemu/SbsaQemu/Include/Library/FdtHelperLib.h
deleted file mode 100644
index ea9159857215..000000000000
--- a/Silicon/Qemu/SbsaQemu/Include/Library/FdtHelperLib.h
+++ /dev/null
@@ -1,36 +0,0 @@
-/** @file
-* FdtHelperLib.h
-*
-* Copyright (c) 2021, NUVIA Inc. All rights reserved.
-*
-* SPDX-License-Identifier: BSD-2-Clause-Patent
-*
-**/
-
-#ifndef FDT_HELPER_LIB_
-#define FDT_HELPER_LIB_
-
-/**
- Get MPIDR for a given cpu from device tree passed by Qemu.
-
- @param [in] CpuId Index of cpu to retrieve MPIDR value for.
-
- @retval MPIDR value of CPU at index <CpuId>
-**/
-UINT64
-FdtHelperGetMpidr (
- IN UINTN CpuId
- );
-
-/** Walks through the Device Tree created by Qemu and counts the number
- of CPUs present in it.
-
- @return The number of CPUs present.
-**/
-EFIAPI
-UINT32
-FdtHelperCountCpus (
- VOID
- );
-
-#endif /* FDT_HELPER_LIB_ */
diff --git a/Silicon/Qemu/SbsaQemu/Include/Library/SbsaQemuSmc.h b/Silicon/Qemu/SbsaQemu/Include/Library/SbsaQemuSmc.h
new file mode 100644
index 000000000000..883b8d0d0d17
--- /dev/null
+++ b/Silicon/Qemu/SbsaQemu/Include/Library/SbsaQemuSmc.h
@@ -0,0 +1,45 @@
+/** @file
+*
+* Copyright (c) Linaro Ltd. All rights reserved.
+*
+* SPDX-License-Identifier: BSD-2-Clause-Patent
+*
+**/
+
+#ifndef SBSA_QEMU_SMC_
+#define SBSA_QEMU_SMC_
+
+/**
+ Get CPU count from information passed by Qemu.
+
+**/
+VOID
+SbsaQemuGetCpuCount (
+ VOID
+ );
+
+/**
+ Get MPIDR for a given cpu from device tree passed by Qemu.
+
+ @param [in] CpuId Index of cpu to retrieve MPIDR value for.
+
+ @retval MPIDR value of CPU at index <CpuId>
+**/
+UINT64
+SbsaQemuGetMpidr (
+ IN UINTN CpuId
+ );
+
+/**
+ Get NUMA node id for a given cpu from device tree passed by Qemu.
+
+ @param [in] CpuId Index of cpu to retrieve NUMA node id for.
+
+ @retval NUMA node id for CPU at index <CpuId>
+**/
+UINT64
+SbsaQemuGetCpuNumaNode (
+ IN UINTN CpuId
+ );
+
+#endif /* SBSA_QEMU_SMC_ */
diff --git a/Platform/Qemu/SbsaQemu/OemMiscLib/OemMiscLib.c b/Platform/Qemu/SbsaQemu/OemMiscLib/OemMiscLib.c
index c38f2851904f..ab97768b5ddc 100644
--- a/Platform/Qemu/SbsaQemu/OemMiscLib/OemMiscLib.c
+++ b/Platform/Qemu/SbsaQemu/OemMiscLib/OemMiscLib.c
@@ -2,7 +2,7 @@
* OemMiscLib.c
*
* Copyright (c) 2021, NUVIA Inc. All rights reserved.
-* Copyright (c) 2020, Linaro Ltd. All rights reserved.
+* Copyright (c) Linaro Ltd. All rights reserved.
*
* SPDX-License-Identifier: BSD-2-Clause-Patent
*
@@ -12,14 +12,12 @@
#include <Guid/ZeroGuid.h>
#include <Library/BaseMemoryLib.h>
#include <Library/DebugLib.h>
-#include <Library/FdtHelperLib.h>
#include <Library/HiiLib.h>
#include <Library/IoLib.h>
#include <Library/OemMiscLib.h>
#include <Library/PcdLib.h>
#include <Library/SerialPortLib.h>
#include <Library/TimerLib.h>
-#include <libfdt.h>
/** Returns whether the specified processor is present or not.
@@ -33,7 +31,7 @@ OemIsProcessorPresent (
UINTN ProcessorIndex
)
{
- if (ProcessorIndex < FdtHelperCountCpus ()) {
+ if (ProcessorIndex < PcdGet32 (PcdCoreCount)) {
return TRUE;
}
@@ -76,7 +74,7 @@ OemGetProcessorInformation (
{
UINT16 ProcessorCount;
- ProcessorCount = FdtHelperCountCpus ();
+ ProcessorCount = PcdGet32 (PcdCoreCount);
if (ProcessorIndex < ProcessorCount) {
ProcessorStatus->Bits.CpuStatus = 1; // CPU enabled
@@ -121,7 +119,7 @@ OemGetMaxProcessors (
VOID
)
{
- return FdtHelperCountCpus ();
+ return PcdGet32 (PcdCoreCount);
}
/** Gets information about the cache at the specified cache level.
diff --git a/Silicon/Qemu/SbsaQemu/Drivers/SbsaQemuAcpiDxe/SbsaQemuAcpiDxe.c b/Silicon/Qemu/SbsaQemu/Drivers/SbsaQemuAcpiDxe/SbsaQemuAcpiDxe.c
index 9fb17151d7b8..fa9102194e84 100644
--- a/Silicon/Qemu/SbsaQemu/Drivers/SbsaQemuAcpiDxe/SbsaQemuAcpiDxe.c
+++ b/Silicon/Qemu/SbsaQemu/Drivers/SbsaQemuAcpiDxe/SbsaQemuAcpiDxe.c
@@ -1,7 +1,7 @@
/** @file
* This file is an ACPI driver for the Qemu SBSA platform.
*
-* Copyright (c) 2020, Linaro Ltd. All rights reserved.
+* Copyright (c) Linaro Ltd. All rights reserved.
*
* SPDX-License-Identifier: BSD-2-Clause-Patent
*
@@ -15,10 +15,10 @@
#include <Library/ArmLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/DebugLib.h>
-#include <Library/FdtHelperLib.h>
#include <Library/MemoryAllocationLib.h>
#include <Library/PcdLib.h>
#include <Library/PrintLib.h>
+#include <Library/SbsaQemuSmc.h>
#include <Library/UefiBootServicesTableLib.h>
#include <Library/UefiDriverEntryPoint.h>
#include <Library/UefiLib.h>
@@ -255,7 +255,7 @@ AddMadtTable (
// Initialize GIC Redistributor Structure
EFI_ACPI_6_0_GICR_STRUCTURE Gicr = SBSAQEMU_MADT_GICR_INIT();
- // Get CoreCount which was determined eariler after parsing device tree
+ // Get CoreCount which was determined earlier from TF-A
NumCores = PcdGet32 (PcdCoreCount);
// Calculate the new table size based on the number of cores
@@ -291,13 +291,13 @@ AddMadtTable (
New += sizeof (EFI_ACPI_6_0_MULTIPLE_APIC_DESCRIPTION_TABLE_HEADER);
// Add new GICC structures for the Cores
- for (CoreIndex = 0; CoreIndex < PcdGet32 (PcdCoreCount); CoreIndex++) {
+ for (CoreIndex = 0; CoreIndex < NumCores; CoreIndex++) {
EFI_ACPI_6_0_GIC_STRUCTURE *GiccPtr;
CopyMem (New, &Gicc, sizeof (EFI_ACPI_6_0_GIC_STRUCTURE));
GiccPtr = (EFI_ACPI_6_0_GIC_STRUCTURE *) New;
GiccPtr->AcpiProcessorUid = CoreIndex;
- GiccPtr->MPIDR = FdtHelperGetMpidr (CoreIndex);
+ GiccPtr->MPIDR = SbsaQemuGetMpidr (CoreIndex);
New += sizeof (EFI_ACPI_6_0_GIC_STRUCTURE);
}
@@ -758,12 +758,6 @@ InitializeSbsaQemuAcpiDxe (
{
EFI_STATUS Status;
EFI_ACPI_TABLE_PROTOCOL *AcpiTable;
- UINT32 NumCores;
-
- // Parse the device tree and get the number of CPUs
- NumCores = FdtHelperCountCpus ();
- Status = PcdSet32S (PcdCoreCount, NumCores);
- ASSERT_RETURN_ERROR (Status);
// Check if ACPI Table Protocol has been installed
Status = gBS->LocateProtocol (
diff --git a/Silicon/Qemu/SbsaQemu/Drivers/SbsaQemuPlatformDxe/SbsaQemuPlatformDxe.c b/Silicon/Qemu/SbsaQemu/Drivers/SbsaQemuPlatformDxe/SbsaQemuPlatformDxe.c
index 4ebbe7c93a19..bc5545a272fe 100644
--- a/Silicon/Qemu/SbsaQemu/Drivers/SbsaQemuPlatformDxe/SbsaQemuPlatformDxe.c
+++ b/Silicon/Qemu/SbsaQemu/Drivers/SbsaQemuPlatformDxe/SbsaQemuPlatformDxe.c
@@ -1,7 +1,7 @@
/** @file
-* FDT client protocol driver for qemu,mach-virt-ahci DT node
+* SbsaQemu Platform Initialization
*
-* Copyright (c) 2019, Linaro Ltd. All rights reserved.
+* Copyright (c) Linaro Ltd. All rights reserved.
*
* SPDX-License-Identifier: BSD-2-Clause-Patent
*
@@ -12,13 +12,12 @@
#include <Library/DebugLib.h>
#include <Library/NonDiscoverableDeviceRegistrationLib.h>
#include <Library/PcdLib.h>
+#include <Library/SbsaQemuSmc.h>
#include <Library/UefiBootServicesTableLib.h>
#include <Library/UefiDriverEntryPoint.h>
#include <IndustryStandard/SbsaQemuSmc.h>
#include <IndustryStandard/SbsaQemuPlatformVersion.h>
-#include <Protocol/FdtClient.h>
-
EFI_STATUS
EFIAPI
InitializeSbsaQemuPlatformDxe (
@@ -123,5 +122,7 @@ InitializeSbsaQemuPlatformDxe (
}
}
+ SbsaQemuGetCpuCount();
+
return EFI_SUCCESS;
}
diff --git a/Silicon/Qemu/SbsaQemu/Library/FdtHelperLib/FdtHelperLib.c b/Silicon/Qemu/SbsaQemu/Library/FdtHelperLib/FdtHelperLib.c
deleted file mode 100644
index 7fdfb055db76..000000000000
--- a/Silicon/Qemu/SbsaQemu/Library/FdtHelperLib/FdtHelperLib.c
+++ /dev/null
@@ -1,98 +0,0 @@
-/** @file
-* FdtHelperLib.c
-*
-* Copyright (c) 2021, NUVIA Inc. All rights reserved.
-* Copyright (c) 2020, Linaro Ltd. All rights reserved.
-*
-* SPDX-License-Identifier: BSD-2-Clause-Patent
-*
-**/
-
-#include <Uefi.h>
-#include <Library/DebugLib.h>
-#include <Library/FdtHelperLib.h>
-#include <Library/PcdLib.h>
-#include <libfdt.h>
-
-STATIC INT32 mFdtFirstCpuOffset;
-STATIC INT32 mFdtCpuNodeSize;
-
-/**
- Get MPIDR for a given cpu from device tree passed by Qemu.
-
- @param [in] CpuId Index of cpu to retrieve MPIDR value for.
-
- @retval MPIDR value of CPU at index <CpuId>
-**/
-UINT64
-FdtHelperGetMpidr (
- IN UINTN CpuId
- )
-{
- VOID *DeviceTreeBase;
- CONST UINT64 *RegVal;
- INT32 Len;
-
- DeviceTreeBase = (VOID *)(UINTN)PcdGet64 (PcdDeviceTreeBaseAddress);
- ASSERT (DeviceTreeBase != NULL);
-
- RegVal = fdt_getprop (DeviceTreeBase,
- mFdtFirstCpuOffset + (CpuId * mFdtCpuNodeSize),
- "reg",
- &Len);
- if (!RegVal) {
- DEBUG ((DEBUG_ERROR, "Couldn't find reg property for CPU:%d\n", CpuId));
- return 0;
- }
-
- return (fdt64_to_cpu (ReadUnaligned64 (RegVal)));
-}
-
-/** Walks through the Device Tree created by Qemu and counts the number
- of CPUs present in it.
-
- @return The number of CPUs present.
-**/
-EFIAPI
-UINT32
-FdtHelperCountCpus (
- VOID
- )
-{
- VOID *DeviceTreeBase;
- INT32 Node;
- INT32 Prev;
- INT32 CpuNode;
- UINT32 CpuCount;
-
- DeviceTreeBase = (VOID *)(UINTN)PcdGet64 (PcdDeviceTreeBaseAddress);
- ASSERT (DeviceTreeBase != NULL);
-
- // Make sure we have a valid device tree blob
- ASSERT (fdt_check_header (DeviceTreeBase) == 0);
-
- CpuNode = fdt_path_offset (DeviceTreeBase, "/cpus");
- if (CpuNode <= 0) {
- DEBUG ((DEBUG_ERROR, "Unable to locate /cpus in device tree\n"));
- return 0;
- }
-
- CpuCount = 0;
-
- // Walk through /cpus node and count the number of subnodes.
- // The count of these subnodes corresponds to the number of
- // CPUs created by Qemu.
- Prev = fdt_first_subnode (DeviceTreeBase, CpuNode);
- mFdtFirstCpuOffset = Prev;
- while (1) {
- CpuCount++;
- Node = fdt_next_subnode (DeviceTreeBase, Prev);
- if (Node < 0) {
- break;
- }
- mFdtCpuNodeSize = Node - Prev;
- Prev = Node;
- }
-
- return CpuCount;
-}
diff --git a/Silicon/Qemu/SbsaQemu/Library/SbsaQemuSmc/SbsaQemuSmc.c b/Silicon/Qemu/SbsaQemu/Library/SbsaQemuSmc/SbsaQemuSmc.c
new file mode 100644
index 000000000000..70bae6739fcb
--- /dev/null
+++ b/Silicon/Qemu/SbsaQemu/Library/SbsaQemuSmc/SbsaQemuSmc.c
@@ -0,0 +1,204 @@
+/** @file
+*
+* Copyright (c) 2021, NUVIA Inc. All rights reserved.
+* Copyright (c) Linaro Ltd. All rights reserved.
+*
+* SPDX-License-Identifier: BSD-2-Clause-Patent
+*
+**/
+
+#include <Library/ArmSmcLib.h>
+#include <Library/DebugLib.h>
+#include <Library/PcdLib.h>
+#include <Library/SbsaQemuSmc.h>
+#include <libfdt.h>
+#include <IndustryStandard/SbsaQemuSmc.h>
+
+/**
+ Get MPIDR for a given cpu from device tree passed by Qemu.
+
+ @param [in] CpuId Index of cpu to retrieve MPIDR value for.
+
+ @retval MPIDR value of CPU at index <CpuId>
+**/
+UINT64
+FdtHelperGetMpidr (
+ IN UINTN CpuId
+ )
+{
+ VOID *DeviceTreeBase;
+ INT32 Node;
+ INT32 Prev;
+ UINT32 CpuCount;
+ CONST UINT64 *RegVal;
+
+ DeviceTreeBase = (VOID *)(UINTN)PcdGet64 (PcdDeviceTreeBaseAddress);
+ ASSERT (DeviceTreeBase != NULL);
+
+ // Make sure we have a valid device tree blob
+ ASSERT (fdt_check_header (DeviceTreeBase) == 0);
+
+ Node = fdt_path_offset (DeviceTreeBase, "/cpus");
+ if (Node <= 0) {
+ DEBUG ((DEBUG_ERROR, "Unable to locate /cpus in device tree\n"));
+ return 0;
+ }
+
+ CpuCount = 0;
+
+ Prev = fdt_first_subnode (DeviceTreeBase, Node);
+ while (1) {
+
+ if (CpuCount == CpuId) {
+ RegVal = fdt_getprop (DeviceTreeBase, Prev, "reg", NULL);
+ if (!RegVal) {
+ DEBUG ((DEBUG_ERROR, "Couldn't find reg property for CPU:%d\n", CpuId));
+ return 0;
+ }
+ return (fdt64_to_cpu (ReadUnaligned64 (RegVal)));
+ }
+
+ Node = fdt_next_subnode (DeviceTreeBase, Prev);
+ if (Node < 0) {
+ break;
+ }
+ Prev = Node;
+ CpuCount++;
+ }
+
+ return 0; /* We did not found MPIDR */
+
+}
+
+/** Walks through the Device Tree created by Qemu and counts the number
+ of CPUs present in it.
+
+ @return The number of CPUs present.
+**/
+EFIAPI
+UINT32
+FdtHelperCountCpus (
+ VOID
+ )
+{
+ VOID *DeviceTreeBase;
+ INT32 Node;
+ INT32 Prev;
+ UINT32 CpuCount;
+
+ DeviceTreeBase = (VOID *)(UINTN)PcdGet64 (PcdDeviceTreeBaseAddress);
+ ASSERT (DeviceTreeBase != NULL);
+
+ // Make sure we have a valid device tree blob
+ ASSERT (fdt_check_header (DeviceTreeBase) == 0);
+
+ Node = fdt_path_offset (DeviceTreeBase, "/cpus");
+ if (Node <= 0) {
+ DEBUG ((DEBUG_ERROR, "Unable to locate /cpus in device tree\n"));
+ return 0;
+ }
+
+ CpuCount = 0;
+
+ // Walk through /cpus node and count the number of subnodes.
+ // The count of these subnodes corresponds to the number of
+ // CPUs created by Qemu.
+ Prev = fdt_first_subnode (DeviceTreeBase, Node);
+ while (1) {
+ CpuCount++;
+ Node = fdt_next_subnode (DeviceTreeBase, Prev);
+ if (Node < 0) {
+ break;
+ }
+ Prev = Node;
+ }
+
+ return CpuCount;
+}
+
+
+/**
+ Get CPU count from information passed by Qemu.
+
+**/
+VOID
+SbsaQemuGetCpuCount (
+ VOID
+ )
+{
+ UINTN Arg0;
+ UINTN SmcResult;
+ RETURN_STATUS Result;
+
+ SmcResult = ArmCallSmc0 (SIP_SVC_GET_CPU_COUNT, &Arg0, NULL, NULL);
+ if (SmcResult != SMC_ARCH_CALL_SUCCESS) {
+ DEBUG ((DEBUG_INFO, "Too old TF-A. We have to get cpu info from DT.\n"));
+ Arg0 = FdtHelperCountCpus();
+ }
+
+ Result = PcdSet32S (PcdCoreCount, Arg0);
+ ASSERT_RETURN_ERROR (Result);
+
+ Arg0 = PcdGet32 (PcdCoreCount);
+
+ DEBUG ((DEBUG_INFO, "We have %d cpus.\n", Arg0));
+}
+
+/**
+ Get MPIDR for a given cpu from device tree passed by Qemu.
+
+ @param [in] CpuId Index of cpu to retrieve MPIDR value for.
+
+ @retval MPIDR value of CPU at index <CpuId>
+**/
+UINT64
+SbsaQemuGetMpidr (
+ IN UINTN CpuId
+ )
+{
+ UINTN SmcResult;
+ UINTN Arg0;
+ UINTN Arg1;
+
+ Arg0 = CpuId;
+
+ SmcResult = ArmCallSmc0 (SIP_SVC_GET_CPU_NODE, &Arg0, &Arg1, NULL);
+ if (SmcResult != SMC_ARCH_CALL_SUCCESS) {
+ DEBUG ((DEBUG_INFO, "Too old TF-A. We have to get cpu info from DT.\n"));
+ Arg1 = FdtHelperGetMpidr(CpuId);
+}
+
+ DEBUG ((DEBUG_ERROR, "MPIDR for CPU:%d = %d\n", CpuId, Arg1));
+
+ return Arg1;
+}
+
+/**
+ Get NUMA node id for a given cpu from device tree passed by Qemu.
+
+ @param [in] CpuId Index of cpu to retrieve NUMA node id for.
+
+ @retval NUMA node id for CPU at index <CpuId>
+**/
+UINT64
+SbsaQemuGetCpuNumaNode (
+ IN UINTN CpuId
+ )
+{
+ UINTN SmcResult;
+ UINTN Arg0;
+ UINTN Arg1;
+
+ Arg0 = CpuId;
+
+ SmcResult = ArmCallSmc0 (SIP_SVC_GET_CPU_NODE, &Arg0, &Arg1, NULL);
+ if (SmcResult != SMC_ARCH_CALL_SUCCESS) {
+ /* No fallback to DeviceTree as we did not had that info earlier. */
+ DEBUG ((DEBUG_ERROR, "Couldn't find information for CPU:%d\n", CpuId));
+ return 0;
+ }
+
+ DEBUG ((DEBUG_ERROR, "NUMA node for CPU:%d = %d\n", CpuId, Arg0));
+
+ return Arg0;
+}
--
2.43.0
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^ permalink raw reply related [flat|nested] 4+ messages in thread
* Re: [edk2-devel] [PATCH edk2-platforms 1/1] SbsaQemu: get cpu information from TF-A
2024-01-15 15:11 ` [edk2-devel] [PATCH edk2-platforms 1/1] SbsaQemu: get cpu information from TF-A Marcin Juszkiewicz
@ 2024-01-15 18:02 ` Leif Lindholm
2024-01-15 18:37 ` Marcin Juszkiewicz
0 siblings, 1 reply; 4+ messages in thread
From: Leif Lindholm @ 2024-01-15 18:02 UTC (permalink / raw)
To: Marcin Juszkiewicz, devel; +Cc: Ard Biesheuvel, Graeme Gregory
On 2024-01-15 15:11, Marcin Juszkiewicz wrote:
> As part of removing DeviceTree use we moved cpu related parts to TF-A.
> On EDK2 side we get values via SMC calls during platform initialization.
Could you split this into three patches?:
- Adding new Library (Library name should have a Lib suffix.)
- Using this library to check whether SMCs are supported, falling back
to FdtHelperLib if not.
- Dropping FdtHelperLib and the fallback paths.
?
/
Leif
> Handled are:
> - get cpu cores count
> - get MPIDR
> - get NUMA node id
>
> If too old TF-A is used then cpu count and MPIDR are read directly from
> DeviceTree.
>
> Signed-off-by: Marcin Juszkiewicz <marcin.juszkiewicz@linaro.org>
> ---
> Platform/Qemu/SbsaQemu/SbsaQemu.dsc | 4 +-
> .../Qemu/SbsaQemu/OemMiscLib/OemMiscLib.inf | 6 +-
> .../SbsaQemuAcpiDxe/SbsaQemuAcpiDxe.inf | 4 +-
> .../SbsaQemuPlatformDxe.inf | 4 +-
> .../Library/FdtHelperLib/FdtHelperLib.inf | 33 ---
> .../Library/SbsaQemuSmc/SbsaQemuSmc.inf | 34 +++
> .../Include/IndustryStandard/SbsaQemuSmc.h | 2 +
> .../SbsaQemu/Include/Library/FdtHelperLib.h | 36 ----
> .../SbsaQemu/Include/Library/SbsaQemuSmc.h | 45 ++++
> .../Qemu/SbsaQemu/OemMiscLib/OemMiscLib.c | 10 +-
> .../Drivers/SbsaQemuAcpiDxe/SbsaQemuAcpiDxe.c | 16 +-
> .../SbsaQemuPlatformDxe/SbsaQemuPlatformDxe.c | 9 +-
> .../Library/FdtHelperLib/FdtHelperLib.c | 98 ---------
> .../Library/SbsaQemuSmc/SbsaQemuSmc.c | 204 ++++++++++++++++++
> 14 files changed, 308 insertions(+), 197 deletions(-)
> delete mode 100644 Silicon/Qemu/SbsaQemu/Library/FdtHelperLib/FdtHelperLib.inf
> create mode 100644 Silicon/Qemu/SbsaQemu/Library/SbsaQemuSmc/SbsaQemuSmc.inf
> delete mode 100644 Silicon/Qemu/SbsaQemu/Include/Library/FdtHelperLib.h
> create mode 100644 Silicon/Qemu/SbsaQemu/Include/Library/SbsaQemuSmc.h
> delete mode 100644 Silicon/Qemu/SbsaQemu/Library/FdtHelperLib/FdtHelperLib.c
> create mode 100644 Silicon/Qemu/SbsaQemu/Library/SbsaQemuSmc/SbsaQemuSmc.c
>
> diff --git a/Platform/Qemu/SbsaQemu/SbsaQemu.dsc b/Platform/Qemu/SbsaQemu/SbsaQemu.dsc
> index 378600050df9..231db11cb07b 100644
> --- a/Platform/Qemu/SbsaQemu/SbsaQemu.dsc
> +++ b/Platform/Qemu/SbsaQemu/SbsaQemu.dsc
> @@ -1,6 +1,6 @@
> #
> # Copyright (c) 2021, NUVIA Inc. All rights reserved.
> -# Copyright (c) 2019, Linaro Limited. All rights reserved.
> +# Copyright (c) 2023, Linaro Ltd. All rights reserved.
> #
> # SPDX-License-Identifier: BSD-2-Clause-Patent
> #
> @@ -126,7 +126,7 @@ [LibraryClasses.common]
> # ARM PL011 UART Driver
> PL011UartLib|ArmPlatformPkg/Library/PL011UartLib/PL011UartLib.inf
>
> - FdtHelperLib|Silicon/Qemu/SbsaQemu/Library/FdtHelperLib/FdtHelperLib.inf
> + SbsaQemuSmc|Silicon/Qemu/SbsaQemu/Library/SbsaQemuSmc/SbsaQemuSmc.inf
> OemMiscLib|Platform/Qemu/SbsaQemu/OemMiscLib/OemMiscLib.inf
>
> # Debug Support
> diff --git a/Platform/Qemu/SbsaQemu/OemMiscLib/OemMiscLib.inf b/Platform/Qemu/SbsaQemu/OemMiscLib/OemMiscLib.inf
> index a34f54d431d4..8e2bf8c512f1 100644
> --- a/Platform/Qemu/SbsaQemu/OemMiscLib/OemMiscLib.inf
> +++ b/Platform/Qemu/SbsaQemu/OemMiscLib/OemMiscLib.inf
> @@ -3,7 +3,7 @@
> #
> # Copyright (c) 2021, NUVIA Inc. All rights reserved.
> # Copyright (c) 2018, Hisilicon Limited. All rights reserved.
> -# Copyright (c) 2018, Linaro Limited. All rights reserved.
> +# Copyright (c) 2023, Linaro Ltd. All rights reserved.
> #
> # SPDX-License-Identifier: BSD-2-Clause-Patent
> #
> @@ -29,8 +29,6 @@ [Packages]
>
> [LibraryClasses]
> BaseMemoryLib
> - FdtLib
> - FdtHelperLib
> IoLib
> PcdLib
>
> @@ -40,7 +38,6 @@ [Guids]
> [Pcd]
> gArmTokenSpaceGuid.PcdEmbeddedControllerFirmwareRelease
> gArmTokenSpaceGuid.PcdSystemBiosRelease
> - gArmVirtSbsaQemuPlatformTokenSpaceGuid.PcdDeviceTreeBaseAddress
>
> gArmVirtSbsaQemuPlatformTokenSpaceGuid.PcdSystemManufacturer
> gArmVirtSbsaQemuPlatformTokenSpaceGuid.PcdSystemSerialNumber
> @@ -56,3 +53,4 @@ [Pcd]
> gArmVirtSbsaQemuPlatformTokenSpaceGuid.PcdChassisManufacturer
> gArmVirtSbsaQemuPlatformTokenSpaceGuid.PcdChassisAssetTag
> gArmVirtSbsaQemuPlatformTokenSpaceGuid.PcdChassisSKU
> + gArmVirtSbsaQemuPlatformTokenSpaceGuid.PcdCoreCount
> diff --git a/Silicon/Qemu/SbsaQemu/Drivers/SbsaQemuAcpiDxe/SbsaQemuAcpiDxe.inf b/Silicon/Qemu/SbsaQemu/Drivers/SbsaQemuAcpiDxe/SbsaQemuAcpiDxe.inf
> index 291743b19115..d23b53586cd3 100644
> --- a/Silicon/Qemu/SbsaQemu/Drivers/SbsaQemuAcpiDxe/SbsaQemuAcpiDxe.inf
> +++ b/Silicon/Qemu/SbsaQemu/Drivers/SbsaQemuAcpiDxe/SbsaQemuAcpiDxe.inf
> @@ -1,7 +1,7 @@
> ## @file
> # This driver modifies ACPI tables for the Qemu SBSA platform
> #
> -# Copyright (c) 2020, Linaro Ltd. All rights reserved.
> +# Copyright (c) Linaro Ltd. All rights reserved.
> #
> # SPDX-License-Identifier: BSD-2-Clause-Patent
> #
> @@ -35,9 +35,9 @@ [LibraryClasses]
> BaseLib
> DebugLib
> DxeServicesLib
> - FdtHelperLib
> PcdLib
> PrintLib
> + SbsaQemuSmc
> UefiDriverEntryPoint
> UefiLib
> UefiRuntimeServicesTableLib
> diff --git a/Silicon/Qemu/SbsaQemu/Drivers/SbsaQemuPlatformDxe/SbsaQemuPlatformDxe.inf b/Silicon/Qemu/SbsaQemu/Drivers/SbsaQemuPlatformDxe/SbsaQemuPlatformDxe.inf
> index 19534b7a274a..c8203a6ffc47 100644
> --- a/Silicon/Qemu/SbsaQemu/Drivers/SbsaQemuPlatformDxe/SbsaQemuPlatformDxe.inf
> +++ b/Silicon/Qemu/SbsaQemu/Drivers/SbsaQemuPlatformDxe/SbsaQemuPlatformDxe.inf
> @@ -1,7 +1,7 @@
> ## @file
> # This driver effectuates SbsaQemu platform configuration settings
> #
> -# Copyright (c) 2019, Linaro Ltd. All rights reserved.
> +# Copyright (c) Linaro Ltd. All rights reserved.
> #
> # SPDX-License-Identifier: BSD-2-Clause-Patent
> #
> @@ -32,6 +32,7 @@ [LibraryClasses]
> PcdLib
> DebugLib
> NonDiscoverableDeviceRegistrationLib
> + SbsaQemuSmc
> UefiDriverEntryPoint
>
> [Pcd]
> @@ -46,6 +47,7 @@ [Pcd]
> gArmTokenSpaceGuid.PcdGicDistributorBase
> gArmTokenSpaceGuid.PcdGicRedistributorsBase
> gArmVirtSbsaQemuPlatformTokenSpaceGuid.PcdGicItsBase
> + gArmVirtSbsaQemuPlatformTokenSpaceGuid.PcdCoreCount
>
>
> [Depex]
> diff --git a/Silicon/Qemu/SbsaQemu/Library/FdtHelperLib/FdtHelperLib.inf b/Silicon/Qemu/SbsaQemu/Library/FdtHelperLib/FdtHelperLib.inf
> deleted file mode 100644
> index 9c059f3e5851..000000000000
> --- a/Silicon/Qemu/SbsaQemu/Library/FdtHelperLib/FdtHelperLib.inf
> +++ /dev/null
> @@ -1,33 +0,0 @@
> -#/** @file
> -#
> -# Component description file for FdtHelperLib module
> -#
> -# Copyright (c) 2021, NUVIA Inc. All rights reserved.
> -#
> -# SPDX-License-Identifier: BSD-2-Clause-Patent
> -#
> -#**/
> -
> -[Defines]
> - INF_VERSION = 1.29
> - BASE_NAME = FdtHelperLib
> - FILE_GUID = 34e4396f-c2fc-4f9e-ad58-0f98e99e3875
> - MODULE_TYPE = BASE
> - VERSION_STRING = 1.0
> - LIBRARY_CLASS = FdtHelperLib
> -
> -[Sources.common]
> - FdtHelperLib.c
> -
> -[Packages]
> - EmbeddedPkg/EmbeddedPkg.dec
> - MdePkg/MdePkg.dec
> - Silicon/Qemu/SbsaQemu/SbsaQemu.dec
> -
> -[LibraryClasses]
> - DebugLib
> - FdtLib
> - PcdLib
> -
> -[FixedPcd]
> - gArmVirtSbsaQemuPlatformTokenSpaceGuid.PcdDeviceTreeBaseAddress
> diff --git a/Silicon/Qemu/SbsaQemu/Library/SbsaQemuSmc/SbsaQemuSmc.inf b/Silicon/Qemu/SbsaQemu/Library/SbsaQemuSmc/SbsaQemuSmc.inf
> new file mode 100644
> index 000000000000..a9d51d8871b0
> --- /dev/null
> +++ b/Silicon/Qemu/SbsaQemu/Library/SbsaQemuSmc/SbsaQemuSmc.inf
> @@ -0,0 +1,34 @@
> +#/* @file
> +#
> +# Copyright (c) Linaro Ltd. All rights reserved.
> +#
> +# SPDX-License-Identifier: BSD-2-Clause-Patent
> +#
> +#*/
> +
> +[Defines]
> + INF_VERSION = 0x0001001c
> + BASE_NAME = SbsaQemuSmc
> + FILE_GUID = 6454006f-6502-46e2-9be4-4bba8d4b29fb
> + MODULE_TYPE = BASE
> + VERSION_STRING = 1.0
> + LIBRARY_CLASS = ArmPlatformLib
> +
> +[Sources]
> + SbsaQemuSmc.c
> +
> +[Packages]
> + ArmPkg/ArmPkg.dec
> + EmbeddedPkg/EmbeddedPkg.dec
> + MdePkg/MdePkg.dec
> + Silicon/Qemu/SbsaQemu/SbsaQemu.dec
> +
> +[LibraryClasses]
> + ArmSmcLib
> + BaseMemoryLib
> + DebugLib
> + FdtLib
> +
> + [Pcd]
> + gArmVirtSbsaQemuPlatformTokenSpaceGuid.PcdDeviceTreeBaseAddress
> + gArmVirtSbsaQemuPlatformTokenSpaceGuid.PcdCoreCount
> diff --git a/Silicon/Qemu/SbsaQemu/Include/IndustryStandard/SbsaQemuSmc.h b/Silicon/Qemu/SbsaQemu/Include/IndustryStandard/SbsaQemuSmc.h
> index 7934875e4aba..e33648ee1462 100644
> --- a/Silicon/Qemu/SbsaQemu/Include/IndustryStandard/SbsaQemuSmc.h
> +++ b/Silicon/Qemu/SbsaQemu/Include/IndustryStandard/SbsaQemuSmc.h
> @@ -14,5 +14,7 @@
> #define SIP_SVC_VERSION SMC_SIP_FUNCTION_ID(1)
> #define SIP_SVC_GET_GIC SMC_SIP_FUNCTION_ID(100)
> #define SIP_SVC_GET_GIC_ITS SMC_SIP_FUNCTION_ID(101)
> +#define SIP_SVC_GET_CPU_COUNT SMC_SIP_FUNCTION_ID(200)
> +#define SIP_SVC_GET_CPU_NODE SMC_SIP_FUNCTION_ID(201)
>
> #endif /* SBSA_QEMU_SMC_H_ */
> diff --git a/Silicon/Qemu/SbsaQemu/Include/Library/FdtHelperLib.h b/Silicon/Qemu/SbsaQemu/Include/Library/FdtHelperLib.h
> deleted file mode 100644
> index ea9159857215..000000000000
> --- a/Silicon/Qemu/SbsaQemu/Include/Library/FdtHelperLib.h
> +++ /dev/null
> @@ -1,36 +0,0 @@
> -/** @file
> -* FdtHelperLib.h
> -*
> -* Copyright (c) 2021, NUVIA Inc. All rights reserved.
> -*
> -* SPDX-License-Identifier: BSD-2-Clause-Patent
> -*
> -**/
> -
> -#ifndef FDT_HELPER_LIB_
> -#define FDT_HELPER_LIB_
> -
> -/**
> - Get MPIDR for a given cpu from device tree passed by Qemu.
> -
> - @param [in] CpuId Index of cpu to retrieve MPIDR value for.
> -
> - @retval MPIDR value of CPU at index <CpuId>
> -**/
> -UINT64
> -FdtHelperGetMpidr (
> - IN UINTN CpuId
> - );
> -
> -/** Walks through the Device Tree created by Qemu and counts the number
> - of CPUs present in it.
> -
> - @return The number of CPUs present.
> -**/
> -EFIAPI
> -UINT32
> -FdtHelperCountCpus (
> - VOID
> - );
> -
> -#endif /* FDT_HELPER_LIB_ */
> diff --git a/Silicon/Qemu/SbsaQemu/Include/Library/SbsaQemuSmc.h b/Silicon/Qemu/SbsaQemu/Include/Library/SbsaQemuSmc.h
> new file mode 100644
> index 000000000000..883b8d0d0d17
> --- /dev/null
> +++ b/Silicon/Qemu/SbsaQemu/Include/Library/SbsaQemuSmc.h
> @@ -0,0 +1,45 @@
> +/** @file
> +*
> +* Copyright (c) Linaro Ltd. All rights reserved.
> +*
> +* SPDX-License-Identifier: BSD-2-Clause-Patent
> +*
> +**/
> +
> +#ifndef SBSA_QEMU_SMC_
> +#define SBSA_QEMU_SMC_
> +
> +/**
> + Get CPU count from information passed by Qemu.
> +
> +**/
> +VOID
> +SbsaQemuGetCpuCount (
> + VOID
> + );
> +
> +/**
> + Get MPIDR for a given cpu from device tree passed by Qemu.
> +
> + @param [in] CpuId Index of cpu to retrieve MPIDR value for.
> +
> + @retval MPIDR value of CPU at index <CpuId>
> +**/
> +UINT64
> +SbsaQemuGetMpidr (
> + IN UINTN CpuId
> + );
> +
> +/**
> + Get NUMA node id for a given cpu from device tree passed by Qemu.
> +
> + @param [in] CpuId Index of cpu to retrieve NUMA node id for.
> +
> + @retval NUMA node id for CPU at index <CpuId>
> +**/
> +UINT64
> +SbsaQemuGetCpuNumaNode (
> + IN UINTN CpuId
> + );
> +
> +#endif /* SBSA_QEMU_SMC_ */
> diff --git a/Platform/Qemu/SbsaQemu/OemMiscLib/OemMiscLib.c b/Platform/Qemu/SbsaQemu/OemMiscLib/OemMiscLib.c
> index c38f2851904f..ab97768b5ddc 100644
> --- a/Platform/Qemu/SbsaQemu/OemMiscLib/OemMiscLib.c
> +++ b/Platform/Qemu/SbsaQemu/OemMiscLib/OemMiscLib.c
> @@ -2,7 +2,7 @@
> * OemMiscLib.c
> *
> * Copyright (c) 2021, NUVIA Inc. All rights reserved.
> -* Copyright (c) 2020, Linaro Ltd. All rights reserved.
> +* Copyright (c) Linaro Ltd. All rights reserved.
> *
> * SPDX-License-Identifier: BSD-2-Clause-Patent
> *
> @@ -12,14 +12,12 @@
> #include <Guid/ZeroGuid.h>
> #include <Library/BaseMemoryLib.h>
> #include <Library/DebugLib.h>
> -#include <Library/FdtHelperLib.h>
> #include <Library/HiiLib.h>
> #include <Library/IoLib.h>
> #include <Library/OemMiscLib.h>
> #include <Library/PcdLib.h>
> #include <Library/SerialPortLib.h>
> #include <Library/TimerLib.h>
> -#include <libfdt.h>
>
> /** Returns whether the specified processor is present or not.
>
> @@ -33,7 +31,7 @@ OemIsProcessorPresent (
> UINTN ProcessorIndex
> )
> {
> - if (ProcessorIndex < FdtHelperCountCpus ()) {
> + if (ProcessorIndex < PcdGet32 (PcdCoreCount)) {
> return TRUE;
> }
>
> @@ -76,7 +74,7 @@ OemGetProcessorInformation (
> {
> UINT16 ProcessorCount;
>
> - ProcessorCount = FdtHelperCountCpus ();
> + ProcessorCount = PcdGet32 (PcdCoreCount);
>
> if (ProcessorIndex < ProcessorCount) {
> ProcessorStatus->Bits.CpuStatus = 1; // CPU enabled
> @@ -121,7 +119,7 @@ OemGetMaxProcessors (
> VOID
> )
> {
> - return FdtHelperCountCpus ();
> + return PcdGet32 (PcdCoreCount);
> }
>
> /** Gets information about the cache at the specified cache level.
> diff --git a/Silicon/Qemu/SbsaQemu/Drivers/SbsaQemuAcpiDxe/SbsaQemuAcpiDxe.c b/Silicon/Qemu/SbsaQemu/Drivers/SbsaQemuAcpiDxe/SbsaQemuAcpiDxe.c
> index 9fb17151d7b8..fa9102194e84 100644
> --- a/Silicon/Qemu/SbsaQemu/Drivers/SbsaQemuAcpiDxe/SbsaQemuAcpiDxe.c
> +++ b/Silicon/Qemu/SbsaQemu/Drivers/SbsaQemuAcpiDxe/SbsaQemuAcpiDxe.c
> @@ -1,7 +1,7 @@
> /** @file
> * This file is an ACPI driver for the Qemu SBSA platform.
> *
> -* Copyright (c) 2020, Linaro Ltd. All rights reserved.
> +* Copyright (c) Linaro Ltd. All rights reserved.
> *
> * SPDX-License-Identifier: BSD-2-Clause-Patent
> *
> @@ -15,10 +15,10 @@
> #include <Library/ArmLib.h>
> #include <Library/BaseMemoryLib.h>
> #include <Library/DebugLib.h>
> -#include <Library/FdtHelperLib.h>
> #include <Library/MemoryAllocationLib.h>
> #include <Library/PcdLib.h>
> #include <Library/PrintLib.h>
> +#include <Library/SbsaQemuSmc.h>
> #include <Library/UefiBootServicesTableLib.h>
> #include <Library/UefiDriverEntryPoint.h>
> #include <Library/UefiLib.h>
> @@ -255,7 +255,7 @@ AddMadtTable (
> // Initialize GIC Redistributor Structure
> EFI_ACPI_6_0_GICR_STRUCTURE Gicr = SBSAQEMU_MADT_GICR_INIT();
>
> - // Get CoreCount which was determined eariler after parsing device tree
> + // Get CoreCount which was determined earlier from TF-A
> NumCores = PcdGet32 (PcdCoreCount);
>
> // Calculate the new table size based on the number of cores
> @@ -291,13 +291,13 @@ AddMadtTable (
> New += sizeof (EFI_ACPI_6_0_MULTIPLE_APIC_DESCRIPTION_TABLE_HEADER);
>
> // Add new GICC structures for the Cores
> - for (CoreIndex = 0; CoreIndex < PcdGet32 (PcdCoreCount); CoreIndex++) {
> + for (CoreIndex = 0; CoreIndex < NumCores; CoreIndex++) {
> EFI_ACPI_6_0_GIC_STRUCTURE *GiccPtr;
>
> CopyMem (New, &Gicc, sizeof (EFI_ACPI_6_0_GIC_STRUCTURE));
> GiccPtr = (EFI_ACPI_6_0_GIC_STRUCTURE *) New;
> GiccPtr->AcpiProcessorUid = CoreIndex;
> - GiccPtr->MPIDR = FdtHelperGetMpidr (CoreIndex);
> + GiccPtr->MPIDR = SbsaQemuGetMpidr (CoreIndex);
> New += sizeof (EFI_ACPI_6_0_GIC_STRUCTURE);
> }
>
> @@ -758,12 +758,6 @@ InitializeSbsaQemuAcpiDxe (
> {
> EFI_STATUS Status;
> EFI_ACPI_TABLE_PROTOCOL *AcpiTable;
> - UINT32 NumCores;
> -
> - // Parse the device tree and get the number of CPUs
> - NumCores = FdtHelperCountCpus ();
> - Status = PcdSet32S (PcdCoreCount, NumCores);
> - ASSERT_RETURN_ERROR (Status);
>
> // Check if ACPI Table Protocol has been installed
> Status = gBS->LocateProtocol (
> diff --git a/Silicon/Qemu/SbsaQemu/Drivers/SbsaQemuPlatformDxe/SbsaQemuPlatformDxe.c b/Silicon/Qemu/SbsaQemu/Drivers/SbsaQemuPlatformDxe/SbsaQemuPlatformDxe.c
> index 4ebbe7c93a19..bc5545a272fe 100644
> --- a/Silicon/Qemu/SbsaQemu/Drivers/SbsaQemuPlatformDxe/SbsaQemuPlatformDxe.c
> +++ b/Silicon/Qemu/SbsaQemu/Drivers/SbsaQemuPlatformDxe/SbsaQemuPlatformDxe.c
> @@ -1,7 +1,7 @@
> /** @file
> -* FDT client protocol driver for qemu,mach-virt-ahci DT node
> +* SbsaQemu Platform Initialization
> *
> -* Copyright (c) 2019, Linaro Ltd. All rights reserved.
> +* Copyright (c) Linaro Ltd. All rights reserved.
> *
> * SPDX-License-Identifier: BSD-2-Clause-Patent
> *
> @@ -12,13 +12,12 @@
> #include <Library/DebugLib.h>
> #include <Library/NonDiscoverableDeviceRegistrationLib.h>
> #include <Library/PcdLib.h>
> +#include <Library/SbsaQemuSmc.h>
> #include <Library/UefiBootServicesTableLib.h>
> #include <Library/UefiDriverEntryPoint.h>
> #include <IndustryStandard/SbsaQemuSmc.h>
> #include <IndustryStandard/SbsaQemuPlatformVersion.h>
>
> -#include <Protocol/FdtClient.h>
> -
> EFI_STATUS
> EFIAPI
> InitializeSbsaQemuPlatformDxe (
> @@ -123,5 +122,7 @@ InitializeSbsaQemuPlatformDxe (
> }
> }
>
> + SbsaQemuGetCpuCount();
> +
> return EFI_SUCCESS;
> }
> diff --git a/Silicon/Qemu/SbsaQemu/Library/FdtHelperLib/FdtHelperLib.c b/Silicon/Qemu/SbsaQemu/Library/FdtHelperLib/FdtHelperLib.c
> deleted file mode 100644
> index 7fdfb055db76..000000000000
> --- a/Silicon/Qemu/SbsaQemu/Library/FdtHelperLib/FdtHelperLib.c
> +++ /dev/null
> @@ -1,98 +0,0 @@
> -/** @file
> -* FdtHelperLib.c
> -*
> -* Copyright (c) 2021, NUVIA Inc. All rights reserved.
> -* Copyright (c) 2020, Linaro Ltd. All rights reserved.
> -*
> -* SPDX-License-Identifier: BSD-2-Clause-Patent
> -*
> -**/
> -
> -#include <Uefi.h>
> -#include <Library/DebugLib.h>
> -#include <Library/FdtHelperLib.h>
> -#include <Library/PcdLib.h>
> -#include <libfdt.h>
> -
> -STATIC INT32 mFdtFirstCpuOffset;
> -STATIC INT32 mFdtCpuNodeSize;
> -
> -/**
> - Get MPIDR for a given cpu from device tree passed by Qemu.
> -
> - @param [in] CpuId Index of cpu to retrieve MPIDR value for.
> -
> - @retval MPIDR value of CPU at index <CpuId>
> -**/
> -UINT64
> -FdtHelperGetMpidr (
> - IN UINTN CpuId
> - )
> -{
> - VOID *DeviceTreeBase;
> - CONST UINT64 *RegVal;
> - INT32 Len;
> -
> - DeviceTreeBase = (VOID *)(UINTN)PcdGet64 (PcdDeviceTreeBaseAddress);
> - ASSERT (DeviceTreeBase != NULL);
> -
> - RegVal = fdt_getprop (DeviceTreeBase,
> - mFdtFirstCpuOffset + (CpuId * mFdtCpuNodeSize),
> - "reg",
> - &Len);
> - if (!RegVal) {
> - DEBUG ((DEBUG_ERROR, "Couldn't find reg property for CPU:%d\n", CpuId));
> - return 0;
> - }
> -
> - return (fdt64_to_cpu (ReadUnaligned64 (RegVal)));
> -}
> -
> -/** Walks through the Device Tree created by Qemu and counts the number
> - of CPUs present in it.
> -
> - @return The number of CPUs present.
> -**/
> -EFIAPI
> -UINT32
> -FdtHelperCountCpus (
> - VOID
> - )
> -{
> - VOID *DeviceTreeBase;
> - INT32 Node;
> - INT32 Prev;
> - INT32 CpuNode;
> - UINT32 CpuCount;
> -
> - DeviceTreeBase = (VOID *)(UINTN)PcdGet64 (PcdDeviceTreeBaseAddress);
> - ASSERT (DeviceTreeBase != NULL);
> -
> - // Make sure we have a valid device tree blob
> - ASSERT (fdt_check_header (DeviceTreeBase) == 0);
> -
> - CpuNode = fdt_path_offset (DeviceTreeBase, "/cpus");
> - if (CpuNode <= 0) {
> - DEBUG ((DEBUG_ERROR, "Unable to locate /cpus in device tree\n"));
> - return 0;
> - }
> -
> - CpuCount = 0;
> -
> - // Walk through /cpus node and count the number of subnodes.
> - // The count of these subnodes corresponds to the number of
> - // CPUs created by Qemu.
> - Prev = fdt_first_subnode (DeviceTreeBase, CpuNode);
> - mFdtFirstCpuOffset = Prev;
> - while (1) {
> - CpuCount++;
> - Node = fdt_next_subnode (DeviceTreeBase, Prev);
> - if (Node < 0) {
> - break;
> - }
> - mFdtCpuNodeSize = Node - Prev;
> - Prev = Node;
> - }
> -
> - return CpuCount;
> -}
> diff --git a/Silicon/Qemu/SbsaQemu/Library/SbsaQemuSmc/SbsaQemuSmc.c b/Silicon/Qemu/SbsaQemu/Library/SbsaQemuSmc/SbsaQemuSmc.c
> new file mode 100644
> index 000000000000..70bae6739fcb
> --- /dev/null
> +++ b/Silicon/Qemu/SbsaQemu/Library/SbsaQemuSmc/SbsaQemuSmc.c
> @@ -0,0 +1,204 @@
> +/** @file
> +*
> +* Copyright (c) 2021, NUVIA Inc. All rights reserved.
> +* Copyright (c) Linaro Ltd. All rights reserved.
> +*
> +* SPDX-License-Identifier: BSD-2-Clause-Patent
> +*
> +**/
> +
> +#include <Library/ArmSmcLib.h>
> +#include <Library/DebugLib.h>
> +#include <Library/PcdLib.h>
> +#include <Library/SbsaQemuSmc.h>
> +#include <libfdt.h>
> +#include <IndustryStandard/SbsaQemuSmc.h>
> +
> +/**
> + Get MPIDR for a given cpu from device tree passed by Qemu.
> +
> + @param [in] CpuId Index of cpu to retrieve MPIDR value for.
> +
> + @retval MPIDR value of CPU at index <CpuId>
> +**/
> +UINT64
> +FdtHelperGetMpidr (
> + IN UINTN CpuId
> + )
> +{
> + VOID *DeviceTreeBase;
> + INT32 Node;
> + INT32 Prev;
> + UINT32 CpuCount;
> + CONST UINT64 *RegVal;
> +
> + DeviceTreeBase = (VOID *)(UINTN)PcdGet64 (PcdDeviceTreeBaseAddress);
> + ASSERT (DeviceTreeBase != NULL);
> +
> + // Make sure we have a valid device tree blob
> + ASSERT (fdt_check_header (DeviceTreeBase) == 0);
> +
> + Node = fdt_path_offset (DeviceTreeBase, "/cpus");
> + if (Node <= 0) {
> + DEBUG ((DEBUG_ERROR, "Unable to locate /cpus in device tree\n"));
> + return 0;
> + }
> +
> + CpuCount = 0;
> +
> + Prev = fdt_first_subnode (DeviceTreeBase, Node);
> + while (1) {
> +
> + if (CpuCount == CpuId) {
> + RegVal = fdt_getprop (DeviceTreeBase, Prev, "reg", NULL);
> + if (!RegVal) {
> + DEBUG ((DEBUG_ERROR, "Couldn't find reg property for CPU:%d\n", CpuId));
> + return 0;
> + }
> + return (fdt64_to_cpu (ReadUnaligned64 (RegVal)));
> + }
> +
> + Node = fdt_next_subnode (DeviceTreeBase, Prev);
> + if (Node < 0) {
> + break;
> + }
> + Prev = Node;
> + CpuCount++;
> + }
> +
> + return 0; /* We did not found MPIDR */
> +
> +}
> +
> +/** Walks through the Device Tree created by Qemu and counts the number
> + of CPUs present in it.
> +
> + @return The number of CPUs present.
> +**/
> +EFIAPI
> +UINT32
> +FdtHelperCountCpus (
> + VOID
> + )
> +{
> + VOID *DeviceTreeBase;
> + INT32 Node;
> + INT32 Prev;
> + UINT32 CpuCount;
> +
> + DeviceTreeBase = (VOID *)(UINTN)PcdGet64 (PcdDeviceTreeBaseAddress);
> + ASSERT (DeviceTreeBase != NULL);
> +
> + // Make sure we have a valid device tree blob
> + ASSERT (fdt_check_header (DeviceTreeBase) == 0);
> +
> + Node = fdt_path_offset (DeviceTreeBase, "/cpus");
> + if (Node <= 0) {
> + DEBUG ((DEBUG_ERROR, "Unable to locate /cpus in device tree\n"));
> + return 0;
> + }
> +
> + CpuCount = 0;
> +
> + // Walk through /cpus node and count the number of subnodes.
> + // The count of these subnodes corresponds to the number of
> + // CPUs created by Qemu.
> + Prev = fdt_first_subnode (DeviceTreeBase, Node);
> + while (1) {
> + CpuCount++;
> + Node = fdt_next_subnode (DeviceTreeBase, Prev);
> + if (Node < 0) {
> + break;
> + }
> + Prev = Node;
> + }
> +
> + return CpuCount;
> +}
> +
> +
> +/**
> + Get CPU count from information passed by Qemu.
> +
> +**/
> +VOID
> +SbsaQemuGetCpuCount (
> + VOID
> + )
> +{
> + UINTN Arg0;
> + UINTN SmcResult;
> + RETURN_STATUS Result;
> +
> + SmcResult = ArmCallSmc0 (SIP_SVC_GET_CPU_COUNT, &Arg0, NULL, NULL);
> + if (SmcResult != SMC_ARCH_CALL_SUCCESS) {
> + DEBUG ((DEBUG_INFO, "Too old TF-A. We have to get cpu info from DT.\n"));
> + Arg0 = FdtHelperCountCpus();
> + }
> +
> + Result = PcdSet32S (PcdCoreCount, Arg0);
> + ASSERT_RETURN_ERROR (Result);
> +
> + Arg0 = PcdGet32 (PcdCoreCount);
> +
> + DEBUG ((DEBUG_INFO, "We have %d cpus.\n", Arg0));
> +}
> +
> +/**
> + Get MPIDR for a given cpu from device tree passed by Qemu.
> +
> + @param [in] CpuId Index of cpu to retrieve MPIDR value for.
> +
> + @retval MPIDR value of CPU at index <CpuId>
> +**/
> +UINT64
> +SbsaQemuGetMpidr (
> + IN UINTN CpuId
> + )
> +{
> + UINTN SmcResult;
> + UINTN Arg0;
> + UINTN Arg1;
> +
> + Arg0 = CpuId;
> +
> + SmcResult = ArmCallSmc0 (SIP_SVC_GET_CPU_NODE, &Arg0, &Arg1, NULL);
> + if (SmcResult != SMC_ARCH_CALL_SUCCESS) {
> + DEBUG ((DEBUG_INFO, "Too old TF-A. We have to get cpu info from DT.\n"));
> + Arg1 = FdtHelperGetMpidr(CpuId);
> +}
> +
> + DEBUG ((DEBUG_ERROR, "MPIDR for CPU:%d = %d\n", CpuId, Arg1));
> +
> + return Arg1;
> +}
> +
> +/**
> + Get NUMA node id for a given cpu from device tree passed by Qemu.
> +
> + @param [in] CpuId Index of cpu to retrieve NUMA node id for.
> +
> + @retval NUMA node id for CPU at index <CpuId>
> +**/
> +UINT64
> +SbsaQemuGetCpuNumaNode (
> + IN UINTN CpuId
> + )
> +{
> + UINTN SmcResult;
> + UINTN Arg0;
> + UINTN Arg1;
> +
> + Arg0 = CpuId;
> +
> + SmcResult = ArmCallSmc0 (SIP_SVC_GET_CPU_NODE, &Arg0, &Arg1, NULL);
> + if (SmcResult != SMC_ARCH_CALL_SUCCESS) {
> + /* No fallback to DeviceTree as we did not had that info earlier. */
> + DEBUG ((DEBUG_ERROR, "Couldn't find information for CPU:%d\n", CpuId));
> + return 0;
> + }
> +
> + DEBUG ((DEBUG_ERROR, "NUMA node for CPU:%d = %d\n", CpuId, Arg0));
> +
> + return Arg0;
> +}
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* Re: [edk2-devel] [PATCH edk2-platforms 1/1] SbsaQemu: get cpu information from TF-A
2024-01-15 18:02 ` Leif Lindholm
@ 2024-01-15 18:37 ` Marcin Juszkiewicz
0 siblings, 0 replies; 4+ messages in thread
From: Marcin Juszkiewicz @ 2024-01-15 18:37 UTC (permalink / raw)
To: Leif Lindholm, devel; +Cc: Ard Biesheuvel, Graeme Gregory
W dniu 15.01.2024 o 19:02, Leif Lindholm pisze:
>> As part of removing DeviceTree use we moved cpu related parts to TF-A.
>> On EDK2 side we get values via SMC calls during platform initialization.
>
> Could you split this into three patches?:
> - Adding new Library (Library name should have a Lib suffix.)
> - Using this library to check whether SMCs are supported, falling back
> to FdtHelperLib if not.
> - Dropping FdtHelperLib and the fallback paths.
>
> ?
Will do. Thanks for suggestion.
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Thread overview: 4+ messages (download: mbox.gz follow: Atom feed
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2024-01-15 15:11 [edk2-devel] [PATCH edk2-platforms 0/1] get rid of DeviceTree from SbsaQemu Marcin Juszkiewicz
2024-01-15 15:11 ` [edk2-devel] [PATCH edk2-platforms 1/1] SbsaQemu: get cpu information from TF-A Marcin Juszkiewicz
2024-01-15 18:02 ` Leif Lindholm
2024-01-15 18:37 ` Marcin Juszkiewicz
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