回复: [edk2-devel] [PATCH] MdeModulePkg\CoreDxe: Allow DXE Drivers to use untested memory


gaoliming
 

Stacy:
This fix covers the case with AllocateAddress allocation type. I agree
this fix. Reviewed-by: Liming Gao <gaoliming@...>

Thanks
Liming

-----邮件原件-----
发件人: devel@edk2.groups.io <devel@edk2.groups.io> 代表 Stacy Howell
发送时间: 2022年1月8日 3:36
收件人: devel@edk2.groups.io
抄送: Stacy Howell <stacy.howell@...>; Dandan Bi
<dandan.bi@...>; Liming Gao <gaoliming@...>
主题: [edk2-devel] [PATCH] MdeModulePkg\CoreDxe: Allow DXE Drivers to
use untested memory

REF: https://https://bugzilla.tianocore.org/show_bug.cgi?id=3795
CC: Dandan Bi <dandan.bi@...>
CC: Liming Gao <gaoliming@...>

Updated CoreInternalAllocatePages() to call PromoteMemoryResource() and
re-attempt the allocation if unable to convert the specified memory range

Signed-off-by: Stacy Howell <stacy.howell@...>
---
MdeModulePkg/Core/Dxe/Mem/Page.c | 14 ++++++++++++++
1 file changed, 14 insertions(+)

diff --git a/MdeModulePkg/Core/Dxe/Mem/Page.c
b/MdeModulePkg/Core/Dxe/Mem/Page.c
index 47d4c5d92e..cc0b90ac0d 100644
--- a/MdeModulePkg/Core/Dxe/Mem/Page.c
+++ b/MdeModulePkg/Core/Dxe/Mem/Page.c
@@ -1417,6 +1417,20 @@ CoreInternalAllocatePages (
Status = CoreConvertPages (Start, NumberOfPages, MemoryType);
}

+ if (EFI_ERROR (Status)) {
+ //
+ // If requested memory region is unavailable it may be untested
memory
+ // Attempt to promote memory resources, then re-attempt the
allocation
+ //
+ if (PromoteMemoryResource ()) {
+ if (NeedGuard) {
+ Status = CoreConvertPagesWithGuard (Start, NumberOfPages,
MemoryType);
+ } else {
+ Status = CoreConvertPages (Start, NumberOfPages, MemoryType);
+ }
+ }
+ }
+
Done:
CoreReleaseMemoryLock ();

--
2.32.0.windows.2




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