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| author | Heyi Guo <heyi.guo@linaro.org> | 2015-09-09 13:37:22 +0000 |
|---|---|---|
| committer | abiesheuvel <abiesheuvel@Edk2> | 2015-09-09 13:37:22 +0000 |
| commit | 946067bfb074962667bd61fafffd0e777242e12b (patch) | |
| tree | 26d134ee8bcc086ab3c2adcf5f62fbe5bf73252d /ArmPkg | |
| parent | 7d189f99d81cd136a33074c66cdabb8ce66118ce (diff) | |
| download | edk2-946067bfb074962667bd61fafffd0e777242e12b.zip edk2-946067bfb074962667bd61fafffd0e777242e12b.tar.gz edk2-946067bfb074962667bd61fafffd0e777242e12b.tar.bz2 | |
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 <heyi.guo@linaro.org>
Cc: Leif Lindholm <leif.lindholm@linaro.org>
Reviewed-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@18422 6f19259b-4bc3-4df7-8a09-765794883524
Diffstat (limited to 'ArmPkg')
| -rw-r--r-- | ArmPkg/Library/ArmLib/AArch64/AArch64Mmu.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/ArmPkg/Library/ArmLib/AArch64/AArch64Mmu.c b/ArmPkg/Library/ArmLib/AArch64/AArch64Mmu.c index a7f3745..5b6c453 100644 --- a/ArmPkg/Library/ArmLib/AArch64/AArch64Mmu.c +++ b/ArmPkg/Library/ArmLib/AArch64/AArch64Mmu.c @@ -314,7 +314,7 @@ GetBlockEntryListFromAddress ( // 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++;
}
|