On Mon, Sep 30, 2019 at 03:25:06PM +0100, Alexandru Elisei wrote:
> Linux commit d0b7a302d58a made it abundantly clear that certain CPU
> implementations require an ISB after a DSB. Add the missing ISB to
> flush_tlb_page. No changes are required for flush_tlb_all, as the function
> already had the ISB.
>
> Signed-off-by: Alexandru Elisei <alexandru.elisei@xxxxxxx>
> ---
> lib/arm64/asm/mmu.h | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/lib/arm64/asm/mmu.h b/lib/arm64/asm/mmu.h
> index fa554b0c20ae..72d75eafc882 100644
> --- a/lib/arm64/asm/mmu.h
> +++ b/lib/arm64/asm/mmu.h
> @@ -24,6 +24,7 @@ static inline void flush_tlb_page(unsigned long vaddr)
> dsb(ishst);
> asm("tlbi vaae1is, %0" :: "r" (page));
> dsb(ish);
> + isb();
> }
>
> static inline void flush_dcache_addr(unsigned long vaddr)
> --
> 2.20.1
>
Reviewed-by: Andrew Jones <drjones@xxxxxxxxxx>
