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OvmfPkg/PlatformPei: emulated NV storage must be EfiRuntimeServicesData 

SVN r14770 ("OvmfPkg/PlatformPei: correctly align emulated NV storage")
made sure the emulated NV storage was allocated with correct alignment.

However, the AllocateRuntimePool() -> AllocateAlignedPages() change
flipped the memory type from EfiRuntimeServicesData to
EfiBootServicesData. This causes variable services to access freed storage
at runtime. It crashes Windows 2008 R2 early at boot, for example.

Keep the alignment, but restore the memory type to EfiRuntimeServicesData,
by calling AllocateAlignedRuntimePages().

These helper functions are implemeted and documented in
"MdePkg/Library/PeiMemoryAllocationLib/MemoryAllocationLib.c".

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@14806 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
Laszlo Ersek 2013-10-29 06:02:46 +00:00 committed by jljusten
parent 2f34e065a3
commit 9edb2933ab
1 changed files with 1 additions and 1 deletions
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2
OvmfPkg/PlatformPei/Platform.c
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@ -287,7 +287,7 @@ ReserveEmuVariableNvStore (
//
VariableStore =
(EFI_PHYSICAL_ADDRESS)(UINTN)
AllocateAlignedPages (
AllocateAlignedRuntimePages (
EFI_SIZE_TO_PAGES (2 * PcdGet32 (PcdFlashNvStorageFtwSpareSize)),
PcdGet32 (PcdFlashNvStorageFtwSpareSize)
);