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arm64/syscall: (Re-)enable interrupts only if they were previously enabled

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Don't change the CPU state unexpectedly
This commit is contained in:
Ville Juven 2024-09-06 14:43:40 +03:00 • committed by Xiang Xiao
parent 498275ca43
commit 87d9dac817
1 changed files with 6 additions and 0 deletions
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6
arch/arm64/src/common/arm64_vectors.S
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@ -222,7 +222,13 @@ SECTION_FUNC(text, arm64_sync_exc)
/* Call dispatch_syscall() on the kernel stack with interrupts enabled */
mrs x10, spsr_el1
and x10, x10, #IRQ_SPSR_MASK
cmp x10, xzr
bne 1f
msr daifclr, #IRQ_DAIF_MASK /* Re-enable interrupts */
1:
bl dispatch_syscall
msr daifset, #IRQ_DAIF_MASK /* Disable interrupts */