[edk2-devel] [PATCH v3] UefiPayloadPkg/UefiPayloadEntry: Improve bootloader memrange parsing
Ma, Maurice
maurice.ma at intel.com
Mon Jun 21 14:06:27 UTC 2021
Looks good to me.
Reviewed-by: Maurice Ma <maurice.ma at intel.com>
Regards
-Maurice
> -----Original Message-----
> From: Patrick Rudolph <patrick.rudolph at 9elements.com>
> Sent: Monday, June 21, 2021 1:10
> To: devel at edk2.groups.io
> Cc: Ma, Maurice <maurice.ma at intel.com>; Dong, Guo
> <guo.dong at intel.com>; You, Benjamin <benjamin.you at intel.com>
> Subject: [PATCH v3] UefiPayloadPkg/UefiPayloadEntry: Improve bootloader
> memrange parsing
>
> Currently several DXE crash due to invalid memory resource settings.
> The PciHostBridgeDxe which expects the MMCONF and PCI Aperature to be
> EfiMemoryMappedIO, but currently those regions are (partly) mapped as
> EfiReservedMemoryType.
>
> coreboot and slimbootloader provide an e820 compatible memory map,
> which doesn't work well with EDK2 as the e820 spec is missing MMIO regions.
> In e820 'reserved' could either mean "DRAM used by boot firmware" or
> "MMIO in use and not detectable by OS".
>
> Guess Top of lower usable DRAM (TOLUD) by walking the bootloader
> provided memory ranges. Memory types of RAM, ACPI and ACPI NVS below
> 4 GiB are used to increment TOLUD and reserved memory ranges touching
> TOLUD at the base are also assumed to be reserved DRAM, which increment
> TOLUD.
>
> Then mark everything reserved below TOLUD as EfiReservedMemoryType
> and everything reserved above TOLUD as EfiMemoryMappedIO.
>
> This fixes assertions seen in PciHostBridgeDxe.
>
> Signed-off-by: Patrick Rudolph <patrick.rudolph at 9elements.com>
> ---
> .../UefiPayloadEntry/UefiPayloadEntry.c | 190 +++++++++++++++++-
> .../UefiPayloadEntry/UefiPayloadEntry.h | 10 +
> 2 files changed, 197 insertions(+), 3 deletions(-)
>
> diff --git a/UefiPayloadPkg/UefiPayloadEntry/UefiPayloadEntry.c
> b/UefiPayloadPkg/UefiPayloadEntry/UefiPayloadEntry.c
> index 805f5448d9..04c58f776c 100644
> --- a/UefiPayloadPkg/UefiPayloadEntry/UefiPayloadEntry.c
> +++ b/UefiPayloadPkg/UefiPayloadEntry/UefiPayloadEntry.c
> @@ -7,10 +7,159 @@
> #include "UefiPayloadEntry.h" +STATIC UINT32 mTopOfLowerUsableDram =
> 0;+ /** Callback function to build resource descriptor HOB This function
> build a HOB based on the memory map entry info.+ It creates only
> EFI_RESOURCE_MEMORY_MAPPED_IO and
> EFI_RESOURCE_MEMORY_RESERVED+ resources.++ @param
> MemoryMapEntry Memory map entry info got from bootloader.+
> @param Params A pointer to ACPI_BOARD_INFO.++ @retval
> EFI_SUCCESS Successfully build a HOB.+ @retval
> EFI_INVALID_PARAMETER Invalid parameter
> provided.+**/+EFI_STATUS+MemInfoCallbackMmio (+ IN
> MEMROY_MAP_ENTRY *MemoryMapEntry,+ IN VOID
> *Params+ )+{+ EFI_PHYSICAL_ADDRESS Base;+ EFI_RESOURCE_TYPE
> Type;+ UINT64 Size;+ EFI_RESOURCE_ATTRIBUTE_TYPE
> Attribue;+ ACPI_BOARD_INFO *AcpiBoardInfo;++ AcpiBoardInfo =
> (ACPI_BOARD_INFO *)Params;+ if (AcpiBoardInfo == NULL) {+ return
> EFI_INVALID_PARAMETER;+ }++ //+ // Skip types already handled in
> MemInfoCallback+ //+ if (MemoryMapEntry->Type == E820_RAM ||
> MemoryMapEntry->Type == E820_ACPI) {+ return EFI_SUCCESS;+ }++ if
> (MemoryMapEntry->Base == AcpiBoardInfo->PcieBaseAddress) {+ //+ //
> MMCONF is always MMIO+ //+ Type =
> EFI_RESOURCE_MEMORY_MAPPED_IO;+ } else if (MemoryMapEntry->Base
> < mTopOfLowerUsableDram) {+ //+ // It's in DRAM and thus must be
> reserved+ //+ Type = EFI_RESOURCE_MEMORY_RESERVED;+ } else if
> ((MemoryMapEntry->Base < 0x100000000ULL) && (MemoryMapEntry-
> >Base >= mTopOfLowerUsableDram)) {+ //+ // It's not in DRAM, must be
> MMIO+ //+ Type = EFI_RESOURCE_MEMORY_MAPPED_IO;+ } else {+
> Type = EFI_RESOURCE_MEMORY_RESERVED;+ }++ Base =
> MemoryMapEntry->Base;+ Size = MemoryMapEntry->Size;++ Attribue =
> EFI_RESOURCE_ATTRIBUTE_PRESENT |+
> EFI_RESOURCE_ATTRIBUTE_INITIALIZED |+
> EFI_RESOURCE_ATTRIBUTE_TESTED |+
> EFI_RESOURCE_ATTRIBUTE_UNCACHEABLE |+
> EFI_RESOURCE_ATTRIBUTE_WRITE_COMBINEABLE |+
> EFI_RESOURCE_ATTRIBUTE_WRITE_THROUGH_CACHEABLE |+
> EFI_RESOURCE_ATTRIBUTE_WRITE_BACK_CACHEABLE;++
> BuildResourceDescriptorHob (Type, Attribue, (EFI_PHYSICAL_ADDRESS)Base,
> Size);+ DEBUG ((DEBUG_INFO , "buildhob: base = 0x%lx, size = 0x%lx, type =
> 0x%x\n", Base, Size, Type));++ if (MemoryMapEntry->Type ==
> E820_UNUSABLE ||+ MemoryMapEntry->Type == E820_DISABLED) {+
> BuildMemoryAllocationHob (Base, Size, EfiUnusableMemory);+ } else if
> (MemoryMapEntry->Type == E820_PMEM) {+ BuildMemoryAllocationHob
> (Base, Size, EfiPersistentMemory);+ }++ return EFI_SUCCESS;+}+++/**+
> Callback function to find TOLUD (Top of Lower Usable DRAM)++ Estimate
> where TOLUD (Top of Lower Usable DRAM) resides. The exact position+
> would require platform specific code.++ @param MemoryMapEntry
> Memory map entry info got from bootloader.+ @param Params Not
> used for now.++ @retval EFI_SUCCESS Successfully updated
> mTopOfLowerUsableDram.+**/+EFI_STATUS+FindToludCallback (+ IN
> MEMROY_MAP_ENTRY *MemoryMapEntry,+ IN VOID
> *Params+ )+{+ //+ // This code assumes that the memory map on this x86
> machine below 4GiB is continous+ // until TOLUD. In addition it assumes that
> the bootloader provided memory tables have+ // no "holes" and thus the
> first memory range not covered by e820 marks the end of+ // usable DRAM.
> In addition it's assumed that every reserved memory region touching+ //
> usable RAM is also covering DRAM, everything else that is marked reserved
> thus must be+ // MMIO not detectable by bootloader/OS+ //++ //+ // Skip
> memory types not RAM or reserved+ //+ if ((MemoryMapEntry->Type ==
> E820_UNUSABLE) || (MemoryMapEntry->Type == E820_DISABLED) ||+
> (MemoryMapEntry->Type == E820_PMEM)) {+ return EFI_SUCCESS;+ }++
> //+ // Skip resources above 4GiB+ //+ if ((MemoryMapEntry->Base +
> MemoryMapEntry->Size) > 0x100000000ULL) {+ return EFI_SUCCESS;+ }++
> if ((MemoryMapEntry->Type == E820_RAM) || (MemoryMapEntry->Type ==
> E820_ACPI) ||+ (MemoryMapEntry->Type == E820_NVS)) {+ //+ // It's
> usable DRAM. Update TOLUD.+ //+ if (mTopOfLowerUsableDram <
> (MemoryMapEntry->Base + MemoryMapEntry->Size)) {+
> mTopOfLowerUsableDram = (UINT32)(MemoryMapEntry->Base +
> MemoryMapEntry->Size);+ }+ } else {+ //+ // It might be 'reserved
> DRAM' or 'MMIO'.+ //+ // If it touches usable DRAM at Base assume it's
> DRAM as well,+ // as it could be bootloader installed tables, TSEG, GTT, ...+
> //+ if (mTopOfLowerUsableDram == MemoryMapEntry->Base) {+
> mTopOfLowerUsableDram = (UINT32)(MemoryMapEntry->Base +
> MemoryMapEntry->Size);+ }+ }++ return EFI_SUCCESS;+}+++/**+
> Callback function to build resource descriptor HOB++ This function build a
> HOB based on the memory map entry info.+ Only add
> EFI_RESOURCE_SYSTEM_MEMORY. @param MemoryMapEntry
> Memory map entry info got from bootloader. @param Params Not
> used for now.@@ -28,7 +177,16 @@ MemInfoCallback (
> UINT64 Size; EFI_RESOURCE_ATTRIBUTE_TYPE Attribue; - Type
> = (MemoryMapEntry->Type == 1) ? EFI_RESOURCE_SYSTEM_MEMORY :
> EFI_RESOURCE_MEMORY_RESERVED;+ //+ // Skip everything not known to
> be usable DRAM.+ // It will be added later.+ //+ if ((MemoryMapEntry-
> >Type != E820_RAM) && (MemoryMapEntry->Type != E820_ACPI) &&+
> (MemoryMapEntry->Type != E820_NVS)) {+ return
> RETURN_SUCCESS;+ }++ Type = EFI_RESOURCE_SYSTEM_MEMORY; Base
> = MemoryMapEntry->Base; Size = MemoryMapEntry->Size; @@ -40,7
> +198,7 @@ MemInfoCallback (
> EFI_RESOURCE_ATTRIBUTE_WRITE_THROUGH_CACHEABLE |
> EFI_RESOURCE_ATTRIBUTE_WRITE_BACK_CACHEABLE; - if (Base >=
> BASE_4GB ) {+ if (Base >= BASE_4GB) { // Remove tested attribute to
> avoid DXE core to dispatch driver to memory above 4GB Attribue &=
> ~EFI_RESOURCE_ATTRIBUTE_TESTED; }@@ -48,6 +206,12 @@
> MemInfoCallback (
> BuildResourceDescriptorHob (Type, Attribue,
> (EFI_PHYSICAL_ADDRESS)Base, Size); DEBUG ((DEBUG_INFO , "buildhob:
> base = 0x%lx, size = 0x%lx, type = 0x%x\n", Base, Size, Type)); + if
> (MemoryMapEntry->Type == E820_ACPI) {+ BuildMemoryAllocationHob
> (Base, Size, EfiACPIReclaimMemory);+ } else if (MemoryMapEntry->Type ==
> E820_NVS) {+ BuildMemoryAllocationHob (Base, Size,
> EfiACPIMemoryNVS);+ }+ return RETURN_SUCCESS; } @@ -236,8 +400,19
> @@ BuildHobFromBl (
> EFI_PEI_GRAPHICS_DEVICE_INFO_HOB *NewGfxDeviceInfo; //- // Parse
> memory info and build memory HOBs+ // First find TOLUD+ //+ DEBUG
> ((DEBUG_INFO , "Guessing Top of Lower Usable DRAM:\n"));+ Status =
> ParseMemoryInfo (FindToludCallback, NULL);+ if (EFI_ERROR(Status)) {+
> return Status;+ }+ DEBUG ((DEBUG_INFO , "Assuming TOLUD = 0x%x\n",
> mTopOfLowerUsableDram));++ //+ // Parse memory info and build memory
> HOBs for Usable RAM //+ DEBUG ((DEBUG_INFO , "Building
> ResourceDescriptorHobs for usable memory:\n")); Status =
> ParseMemoryInfo (MemInfoCallback, NULL); if (EFI_ERROR(Status))
> { return Status;@@ -289,6 +464,15 @@ BuildHobFromBl (
> DEBUG ((DEBUG_INFO, "Create acpi board info guid hob\n")); } + //+ //
> Parse memory info and build memory HOBs for reserved DRAM and MMIO+
> //+ DEBUG ((DEBUG_INFO , "Building ResourceDescriptorHobs for reserved
> memory:\n"));+ Status = ParseMemoryInfo (MemInfoCallbackMmio,
> &AcpiBoardInfo);+ if (EFI_ERROR(Status)) {+ return Status;+ }+ // //
> Parse platform specific information. //diff --git
> a/UefiPayloadPkg/UefiPayloadEntry/UefiPayloadEntry.h
> b/UefiPayloadPkg/UefiPayloadEntry/UefiPayloadEntry.h
> index 2c84d6ed53..4fd50e47cd 100644
> --- a/UefiPayloadPkg/UefiPayloadEntry/UefiPayloadEntry.h
> +++ b/UefiPayloadPkg/UefiPayloadEntry/UefiPayloadEntry.h
> @@ -38,6 +38,16 @@
> #define GET_OCCUPIED_SIZE(ActualSize, Alignment) \ ((ActualSize) +
> (((Alignment) - ((ActualSize) & ((Alignment) - 1))) & ((Alignment) - 1)))
> ++#define E820_RAM 1+#define E820_RESERVED 2+#define E820_ACPI
> 3+#define E820_NVS 4+#define E820_UNUSABLE 5+#define
> E820_DISABLED 6+#define E820_PMEM 7+#define E820_UNDEFINED 8+
> /** Auto-generated function that calls the library constructors for all of the
> module's dependent libraries.--
> 2.30.2
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