[edk2-devel] [edk2-test][PATCH v1 1/1] uefi-sct/SctPkg: Update page alignment calculations
Samer El-Haj-Mahmoud
samer.el-haj-mahmoud at arm.com
Tue Aug 3 13:10:17 UTC 2021
+Heinrich
> -----Original Message-----
> From: devel at edk2.groups.io <devel at edk2.groups.io> On Behalf Of Sunny
> Wang via groups.io
> Sent: Monday, July 19, 2021 4:08 AM
> To: devel at edk2.groups.io
> Cc: Sunny Wang <Sunny.Wang at arm.com>; Samer El-Haj-Mahmoud
> <Samer.El-Haj-Mahmoud at arm.com>; G Edhaya Chandran
> <Edhaya.Chandran at arm.com>; Barton Gao <gaojie at byosoft.com.cn>;
> Sunny Wang <Sunny.Wang at arm.com>
> Subject: [edk2-devel] [edk2-test][PATCH v1 1/1] uefi-sct/SctPkg: Update
> page alignment calculations
>
> This is to fix the SCT BS.AllocatePages failures (not found) with the
> case that the Start address is not aligned to 64k.
> For example,
> The following is available memory region for testing:
> 0000000082012000-00000000EB6D9FFF 00000000000696C8
> With the current page alignment calculation, we will get:
> Start address is 0x82020000
> PageNum is 0x696B8
> In BS.AllocatePages, it will make the end address align with 64k,
> so PageNum will be changed from 0x696B8 to 0x696C0. Therefore, the
> end address will become 0xEB6E0000 which is larger than 0xEB6D9FFF,
> so we get not found error in the end.
>
> Therefore, the calculation for getting the PageNum should be updated
> to PageNum - (2 * EFI_SIZE_TO_PAGES(0x10000)) so that we won't get a
> wrong PageNum to allocate a memory with a size larger than available
> space's size.
>
> With this solution, the example above will get 0x696A8 as calculated
> PageNum. Then, in BS.AllocatePages, the PageNum will be changed from
> 0x696A8 to 0x696B0. Therefore, the end address will become 0xEB6D0000
> that is smaller than 0xEB6D9FFF, so we get not found error in the end.
>
> I also tested this solution on two ARM platforms (NXP1046A and RPi4).
>
> Cc: Samer El-Haj-Mahmoud <samer.el-haj-mahmoud at arm.com>
> Cc: G Edhaya Chandran <edhaya.chandran at arm.com>
> Cc: Barton Gao <gaojie at byosoft.com.cn>
> Signed-off-by: Sunny Wang <sunny.wang at arm.com>
> ---
> .../MemoryAllocationServicesBBTestFunction.c | 110 +++++++++++-------
> 1 file changed, 66 insertions(+), 44 deletions(-)
>
> diff --git a/uefi-
> sct/SctPkg/TestCase/UEFI/EFI/BootServices/MemoryAllocationServices/Blac
> kBoxTest/MemoryAllocationServicesBBTestFunction.c b/uefi-
> sct/SctPkg/TestCase/UEFI/EFI/BootServices/MemoryAllocationServices/Blac
> kBoxTest/MemoryAllocationServicesBBTestFunction.c
> index bf8cd3b3..cdfac992 100644
> --- a/uefi-
> sct/SctPkg/TestCase/UEFI/EFI/BootServices/MemoryAllocationServices/Blac
> kBoxTest/MemoryAllocationServicesBBTestFunction.c
> +++ b/uefi-
> sct/SctPkg/TestCase/UEFI/EFI/BootServices/MemoryAllocationServices/Blac
> kBoxTest/MemoryAllocationServicesBBTestFunction.c
> @@ -2,6 +2,7 @@
>
> Copyright 2006 - 2013 Unified EFI, Inc.<BR>
> Copyright (c) 2010 - 2013, Intel Corporation. All rights reserved.<BR>
> + Copyright (c) 2021, ARM Limited. All rights reserved.
>
> This program and the accompanying materials
> are licensed and made available under the terms and conditions of the BSD
> License
> @@ -24,7 +25,7 @@ Abstract:
>
> --*/
>
> -#include "SctLib.h"
> +#include "SctLib.h"
> #include "MemoryAllocationServicesBBTestMain.h"
>
> #define ALLOCATEPAGES_MEMORYTYPE_NUM 16
> @@ -700,14 +701,17 @@ BBTestAllocatePagesInterfaceTest (
> PageNum = (UINTN)Descriptor.NumberOfPages;
> Start = Descriptor.PhysicalStart;
>
> - //
> - // Some memory types need more alignment than 4K, so
> - //
> - if (PageNum <= 0x10) {
> + //
> + // Calculate New Start address and PageNum with 64k alignment to
> + // cover the case that some memory types' alignment is more than
> + // 4k. If the available memory is less than 192k, the memory
> + // allocation call will be skipped.
> + //
> + if (PageNum < (3 * EFI_SIZE_TO_PAGES(0x10000))) {
> break;
> }
> - Start = (Start + 0xFFFF) & 0xFFFFFFFFFFFF0000;
> - PageNum = PageNum - EFI_SIZE_TO_PAGES(0x10000);
> + Start = (Start + 0xFFFF) & 0xFFFFFFFFFFFF0000;
> + PageNum = PageNum - (2 * EFI_SIZE_TO_PAGES(0x10000));
>
> Memory = Start;
>
> @@ -830,14 +834,17 @@ BBTestAllocatePagesInterfaceTest (
> PageNum = (UINTN)Descriptor.NumberOfPages;
> Start = Descriptor.PhysicalStart;
>
> - //
> - // Some memory types need more alignment than 4K, so
> - //
> - if (PageNum <= 0x10) {
> + //
> + // Calculate New Start address and PageNum with 64k alignment to
> + // cover the case that some memory types' alignment is more than
> + // 4k. If the available memory is less than 192k, the memory
> + // allocation call will be skipped.
> + //
> + if (PageNum < (3 * EFI_SIZE_TO_PAGES(0x10000))) {
> break;
> }
> - Start = (Start + 0xFFFF) & 0xFFFFFFFFFFFF0000;
> - PageNum = PageNum - EFI_SIZE_TO_PAGES(0x10000);
> + Start = (Start + 0xFFFF) & 0xFFFFFFFFFFFF0000;
> + PageNum = PageNum - (2 * EFI_SIZE_TO_PAGES(0x10000));
>
> Memory = Start;
>
> @@ -953,14 +960,17 @@ BBTestAllocatePagesInterfaceTest (
> PageNum = (UINTN)Descriptor.NumberOfPages;
> Start = Descriptor.PhysicalStart;
>
> - //
> - // Some memory types need more alignment than 4K, so
> - //
> - if (PageNum <= 0x10) {
> + //
> + // Calculate New Start address and PageNum with 64k alignment to
> + // cover the case that some memory types' alignment is more than
> + // 4k. If the available memory is less than 192k, the memory
> + // allocation call will be skipped.
> + //
> + if (PageNum < (3 * EFI_SIZE_TO_PAGES(0x10000))) {
> break;
> }
> - Start = (Start + 0xFFFF) & 0xFFFFFFFFFFFF0000;
> - PageNum = PageNum - EFI_SIZE_TO_PAGES(0x10000);
> + Start = (Start + 0xFFFF) & 0xFFFFFFFFFFFF0000;
> + PageNum = PageNum - (2 * EFI_SIZE_TO_PAGES(0x10000));
>
> Memory = Start + (SctLShiftU64 (PageNum/3, EFI_PAGE_SHIFT) &
> 0xFFFFFFFFFFFF0000);
>
> @@ -1076,14 +1086,17 @@ BBTestAllocatePagesInterfaceTest (
> PageNum = (UINTN)Descriptor.NumberOfPages;
> Start = Descriptor.PhysicalStart;
>
> - //
> - // Some memory types need more alignment than 4K, so
> - //
> - if (PageNum <= 0x10) {
> + //
> + // Calculate New Start address and PageNum with 64k alignment to
> + // cover the case that some memory types' alignment is more than
> + // 4k. If the available memory is less than 192k, the memory
> + // allocation call will be skipped.
> + //
> + if (PageNum < (3 * EFI_SIZE_TO_PAGES(0x10000))) {
> break;
> }
> - Start = (Start + 0xFFFF) & 0xFFFFFFFFFFFF0000;
> - PageNum = PageNum - EFI_SIZE_TO_PAGES(0x10000);
> + Start = (Start + 0xFFFF) & 0xFFFFFFFFFFFF0000;
> + PageNum = PageNum - (2 * EFI_SIZE_TO_PAGES(0x10000));
>
> Memory = Start + (SctLShiftU64 (PageNum * 2 / 3, EFI_PAGE_SHIFT) &
> 0xFFFFFFFFFFFF0000);
>
> @@ -1206,14 +1219,17 @@ BBTestAllocatePagesInterfaceTest (
> PageNum = (UINTN)Descriptor.NumberOfPages;
> Start = Descriptor.PhysicalStart;
>
> - //
> - // Some memory types need more alignment than 4K, so
> - //
> - if (PageNum <= 0x10) {
> + //
> + // Calculate New Start address and PageNum with 64k alignment to
> + // cover the case that some memory types' alignment is more than
> + // 4k. If the available memory is less than 192k, the memory
> + // allocation call will be skipped.
> + //
> + if (PageNum < (3 * EFI_SIZE_TO_PAGES(0x10000))) {
> break;
> }
> - Start = (Start + 0xFFFF) & 0xFFFFFFFFFFFF0000;
> - PageNum = PageNum - EFI_SIZE_TO_PAGES(0x10000);
> + Start = (Start + 0xFFFF) & 0xFFFFFFFFFFFF0000;
> + PageNum = PageNum - (2 * EFI_SIZE_TO_PAGES(0x10000));
>
> Memory = Start;
>
> @@ -1329,14 +1345,17 @@ BBTestAllocatePagesInterfaceTest (
> PageNum = (UINTN)Descriptor.NumberOfPages;
> Start = Descriptor.PhysicalStart;
>
> - //
> - // Some memory types need more alignment than 4K, so
> - //
> - if (PageNum <= 0x10) {
> + //
> + // Calculate New Start address and PageNum with 64k alignment to
> + // cover the case that some memory types' alignment is more than
> + // 4k. If the available memory is less than 192k, the memory
> + // allocation call will be skipped.
> + //
> + if (PageNum < (3 * EFI_SIZE_TO_PAGES(0x10000))) {
> break;
> }
> - Start = (Start + 0xFFFF) & 0xFFFFFFFFFFFF0000;
> - PageNum = PageNum - EFI_SIZE_TO_PAGES(0x10000);
> + Start = (Start + 0xFFFF) & 0xFFFFFFFFFFFF0000;
> + PageNum = PageNum - (2 * EFI_SIZE_TO_PAGES(0x10000));
>
> Memory = Start;
>
> @@ -1468,14 +1487,17 @@ BBTestAllocatePagesInterfaceTest (
> PageNum = (UINTN)Descriptor.NumberOfPages;
> Start = Descriptor.PhysicalStart;
>
> - //
> - // Some memory types need more alignment than 4K, so
> - //
> - if (PageNum <= 0x10) {
> + //
> + // Calculate New Start address and PageNum with 64k alignment to
> + // cover the case that some memory types' alignment is more than
> + // 4k. If the available memory is less than 192k, the memory
> + // allocation call will be skipped.
> + //
> + if (PageNum < (3 * EFI_SIZE_TO_PAGES(0x10000))) {
> break;
> }
> - Start = (Start + 0xFFFF) & 0xFFFFFFFFFFFF0000;
> - PageNum = PageNum - EFI_SIZE_TO_PAGES(0x10000);
> + Start = (Start + 0xFFFF) & 0xFFFFFFFFFFFF0000;
> + PageNum = PageNum - (2 * EFI_SIZE_TO_PAGES(0x10000));
>
> Memory = Start;
>
> @@ -1923,4 +1945,4 @@ BBTestFreePoolInterfaceTest (
>
> FreeMemoryMap ();
> return EFI_SUCCESS;
> -}
> +}
> --
> 2.31.0.windows.1
>
>
>
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