Re: [PATCH v3 3/9] arm64: KVM: Add invalidate_icache_range helper

Will Deacon
2017-10-23T16:19:14Z

On Mon, Oct 23, 2017 at 05:11:16PM +0100, Marc Zyngier wrote:
> We currently tightly couple dcache clean with icache invalidation,
> but KVM could do without the initial flush to PoU, as we've
> already flushed things to PoC.
>
> Let's introduce invalidate_icache_range which is limited to
> invalidating the icache from the linear mapping (and thus
> has none of the userspace fault handling complexity), and
> wire it in KVM instead of flush_icache_range.
>
> Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org>
> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
> ---
> arch/arm64/include/asm/assembler.h | 21 +++++++++++++++++++++
> arch/arm64/include/asm/cacheflush.h | 7 +++++++
> arch/arm64/include/asm/kvm_mmu.h | 4 ++--
> arch/arm64/mm/cache.S | 32 ++++++++++++++++++++++----------
> 4 files changed, 52 insertions(+), 12 deletions(-)

Acked-by: Will Deacon <will.deacon@arm.com>

Thanks for respinning this.

Will