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@intel.com>
Cc: Ray Ni <ray.ni@intel.com>
Cc: Maurice Ma <maurice.ma@intel.com>
Cc: Benjamin You <benjamin.you@intel.com>

Signed-off-by: Zhiguang Liu <zhiguang.liu@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



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

-----Original Message-----
From: Liu, Zhiguang <zhiguang.liu@intel.com> 
Sent: Sunday, November 28, 2021 10:30 PM
To: devel@edk2.groups.io
Cc: Dong, Guo <guo.dong@intel.com>; Ni, Ray <ray.ni@intel.com>; Ma, Maurice <maurice.ma@intel.com>; You, Benjamin <benjamin.you@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@intel.com>
Cc: Ray Ni <ray.ni@intel.com>
Cc: Maurice Ma <maurice.ma@intel.com>
Cc: Benjamin You <benjamin.you@intel.com>

Signed-off-by: Zhiguang Liu <zhiguang.liu@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



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