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| author |  Will Deacon <will.deacon@arm.com>
| 2017-07-24 11:46:09 +0100 |
|---|---|---|
| committer | Will Deacon <will.deacon@arm.com>
| 2017-07-28 10:32:14 +0100 |
| commit | 92bbd16e500c85bc210ba48caecbfbdb721bb5b4 (patch) | |
| tree | 0acd7880c40cc9ff9aa25cfab242d9ba528db6cd /include/linux/dma-mapping.h | |
| parent | drivers/perf: arm_pmu: Request PMU SPIs with IRQF_PER_CPU (diff) | |
| download | linux-92bbd16e500c85bc210ba48caecbfbdb721bb5b4.tar.gz linux-92bbd16e500c85bc210ba48caecbfbdb721bb5b4.tar.bz2 linux-92bbd16e500c85bc210ba48caecbfbdb721bb5b4.zip | |
arm64: mmu: Place guard page after mapping of kernel image
The vast majority of virtual allocations in the vmalloc region are followed
by a guard page, which can help to avoid overruning on vma into another,
which may map a read-sensitive device.
This patch adds a guard page to the end of the kernel image mapping (i.e.
following the data/bss segments).
Cc: Mark Rutland <mark.rutland@arm.com>
Reviewed-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Diffstat (limited to 'include/linux/dma-mapping.h')
0 files changed, 0 insertions, 0 deletions