[edk2-devel] [PATCH] UefiPayloadPkg: Increase SystemMemoryUefiRegionSize from 32M to 64M

[Guo Dong]

Reviewed-by: Guo Dong <guo.dong at intel.com>

-----Original Message-----
From: Liu, Zhiguang <zhiguang.liu at intel.com> 
Sent: Sunday, November 28, 2021 10:30 PM
To: devel at edk2.groups.io
Cc: Dong, Guo <guo.dong at intel.com>; Ni, Ray <ray.ni at intel.com>; Ma, Maurice <maurice.ma at intel.com>; You, Benjamin <benjamin.you at intel.com>
Subject: [PATCH] UefiPayloadPkg: Increase SystemMemoryUefiRegionSize from 32M to 64M

Current, the SystemMemoryUefiRegionSize is 32M, which means in universal payload entry, we can at most use 32M heap.
However, this can't meet the memory requirment for 5 level page table.
In UefiPayloadPkg\UefiPayloadEntry\X64\VirtualMemory.c, we assume the Physical Address at most has 52 bits. Using 1G table support, with 52 bits Physical Address, to build page table, we need one overall page table, eight five-level page tables, and for each five-level page table, we need
512 four-level page tables. Totally 8209 pages are needed, which is around 32M bytes.
Therefore, increase SystemMemoryUefiRegionSize from 32M to 64M to support
5 level page tables.

Cc: Guo Dong <guo.dong at intel.com>
Cc: Ray Ni <ray.ni at intel.com>
Cc: Maurice Ma <maurice.ma at intel.com>
Cc: Benjamin You <benjamin.you at intel.com>

Signed-off-by: Zhiguang Liu <zhiguang.liu at intel.com>
---
 UefiPayloadPkg/UefiPayloadPkg.dec | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/UefiPayloadPkg/UefiPayloadPkg.dec b/UefiPayloadPkg/UefiPayloadPkg.dec
index faa98eb98a..551f0a4915 100644
--- a/UefiPayloadPkg/UefiPayloadPkg.dec
+++ b/UefiPayloadPkg/UefiPayloadPkg.dec
@@ -79,7 +79,7 @@ gUefiPayloadPkgTokenSpaceGuid.PcdMemoryTypeEfiRuntimeServicesData|0xC0|UINT32|0x
 gUefiPayloadPkgTokenSpaceGuid.PcdMemoryTypeEfiRuntimeServicesCode|0x80|UINT32|0x00000016  # Size of the region used by UEFI in permanent memory-gUefiPayloadPkgTokenSpaceGuid.PcdSystemMemoryUefiRegionSize|0x02000000|UINT32|0x00000017+gUefiPayloadPkgTokenSpaceGuid.PcdSystemMemoryUefiRegionSize|0x04000000|UINT32|0x00000017  gUefiPayloadPkgTokenSpaceGuid.PcdPcdDriverFile|{ 0x57, 0x72, 0xcf, 0x80, 0xab, 0x87, 0xf9, 0x47, 0xa3, 0xfe, 0xD5, 0x0B, 0x76, 0xd8, 0x95, 0x41 }|VOID*|0x00000018 --
2.32.0.windows.2



-=-=-=-=-=-=-=-=-=-=-=-
Groups.io Links: You receive all messages sent to this group.
View/Reply Online (#84131): https://edk2.groups.io/g/devel/message/84131
Mute This Topic: https://groups.io/mt/87372359/1813853
Group Owner: devel+owner at edk2.groups.io
Unsubscribe: https://edk2.groups.io/g/devel/unsub [edk2-devel-archive at redhat.com]
-=-=-=-=-=-=-=-=-=-=-=-