Revision: 18422
http://sourceforge.net/p/edk2/code/18422
Author: abiesheuvel
Date: 2015-09-09 13:37:22 +0000 (Wed, 09 Sep 2015)
Log Message:
-----------
ArmPkg/Mmu: Fix page level calculation bug
The bug can be triggered when alignment of Base is larger than Length
by 2 level of page granularity, e.g.
Base is 0x4000_0000, Length is 0x1000
The original code will change 2MB page level and we will get a
negative remaining length.
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Heyi Guo <[email protected]>
Cc: Leif Lindholm <[email protected]>
Reviewed-by: Ard Biesheuvel <[email protected]>
Modified Paths:
--------------
trunk/edk2/ArmPkg/Library/ArmLib/AArch64/AArch64Mmu.c
Modified: trunk/edk2/ArmPkg/Library/ArmLib/AArch64/AArch64Mmu.c
===================================================================
--- trunk/edk2/ArmPkg/Library/ArmLib/AArch64/AArch64Mmu.c 2015-09-09
13:37:13 UTC (rev 18421)
+++ trunk/edk2/ArmPkg/Library/ArmLib/AArch64/AArch64Mmu.c 2015-09-09
13:37:22 UTC (rev 18422)
@@ -314,7 +314,7 @@
// If the required size is smaller than the current block size then we need
to go to the page below.
// The PageLevel was calculated on the Base Address alignment but did not
take in account the alignment
// of the allocation size
- if (*BlockEntrySize < TT_BLOCK_ENTRY_SIZE_AT_LEVEL (PageLevel)) {
+ while (*BlockEntrySize < TT_BLOCK_ENTRY_SIZE_AT_LEVEL (PageLevel)) {
// It does not fit so we need to go a page level above
PageLevel++;
}
------------------------------------------------------------------------------
Monitor Your Dynamic Infrastructure at Any Scale With Datadog!
Get real-time metrics from all of your servers, apps and tools
in one place.
SourceForge users - Click here to start your Free Trial of Datadog now!
http://pubads.g.doubleclick.net/gampad/clk?id=241902991&iu=/4140
_______________________________________________
edk2-commits mailing list
[email protected]
https://lists.sourceforge.net/lists/listinfo/edk2-commits
