arm64/mm: Map pages for guarded control stack

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Map pages flagged as being part of a GCS as such rather than using the
full set of generic VM flags.

This is done using a conditional rather than extending the size of
protection_map since that would make for a very sparse array.

Reviewed-by: Thiago Jung Bauermann <thiago.bauermann@linaro.org>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20241001-arm64-gcs-v13-15-222b78d87eee@kernel.org
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

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Mark Brown 2024-10-01 23:58:54 +01:00 • committed by Catalin Marinas

parent ae80e1629a

commit 6497b66ba6

2 changed files with 17 additions and 1 deletions

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9

arch/arm64/include/asm/mman.h

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9

arch/arm64/mm/mmap.c

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