arm64: bti: Fix support for userspace only BTI

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When setting PTE_MAYBE_GP we check system_supports_bti() but this is
true for systems where only CONFIG_BTI is set causing us to enable BTI
on some kernel text. Add an extra check for the kernel mode option,
using an ifdef due to line length.

Fixes: c8027285e3 ("arm64: Set GP bit in kernel page tables to enable BTI for the kernel")
Signed-off-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20200512113950.29996-1-broonie@kernel.org
Signed-off-by: Will Deacon <will@kernel.org>

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Mark Brown 2020-05-12 12:39:50 +01:00 • committed by Will Deacon

parent 3a88d7c5c9

commit e4e9f6dfee

1 changed files with 8 additions and 0 deletions

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arch/arm64/include/asm/pgtable-prot.h

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