Most of the times it is desirable not to use special purpose
memory for regular edk2 usages. That memory (HBm/CXL) are
either meant for special purposes or are less reliable to
be used. So avoid using them as long as possible. We could
also introduce PCD for this control.
Cc: Liming Gao <gaolim...@byosoft.com.cn>
Signed-off-by: Dhaval Sharma <dha...@rivosinc.com>
---
MdeModulePkg/Core/Dxe/Mem/Page.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/MdeModulePkg/Core/Dxe/Mem/Page.c b/MdeModulePkg/Core/Dxe/Mem/Page.c
index 5a51d9df1a29..e4daa741b971 100644
--- a/MdeModulePkg/Core/Dxe/Mem/Page.c
+++ b/MdeModulePkg/Core/Dxe/Mem/Page.c
@@ -1183,6 +1183,13 @@ CoreFindFreePagesI (
continue;
}
+ //
+ // Don't allocate out of Special-Purpose memory.
+ //
+ if ((Entry->Attribute & EFI_MEMORY_SP) != 0) {
+ continue;
+ }
+
DescStart = Entry->Start;
DescEnd = Entry->End;
--
2.40.1
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