arm64: Use daifflag_restore after bp_hardening

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For EL0 entries requiring bp_hardening, daif status is kept at
DAIF_PROCCTX_NOIRQ until after hardening has been done. Then interrupts
are enabled through local_irq_enable().

Before using local_irq_* functions, daifflags should be properly restored
to a state where IRQs are enabled.

Enable IRQs by restoring DAIF_PROCCTX state after bp hardening.

Acked-by: James Morse <james.morse@arm.com>
Signed-off-by: Julien Thierry <julien.thierry@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

...

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Julien Thierry 2018-08-28 16:51:15 +01:00 • committed by Catalin Marinas

parent f05692919b

commit 9a0c032825

1 changed files with 3 additions and 2 deletions

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arch/arm64/mm/fault.c

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