[PATCH 2/3] arm64: Add HYP interface to flush VM Stage 1/2 TLB entires

[Christoffer Dall]

On Thu, Oct 09, 2014 at 07:34:06PM -0700, Mario Smarduch wrote:
> This patch adds HYP VM TLB FLush function.
> 
> Signed-off-by: Mario Smarduch <m.smarduch at samsung.com>
> ---
>  arch/arm64/kvm/hyp.S | 22 ++++++++++++++++++++++
>  1 file changed, 22 insertions(+)
> 
> diff --git a/arch/arm64/kvm/hyp.S b/arch/arm64/kvm/hyp.S
> index b0d1512..117a91c 100644
> --- a/arch/arm64/kvm/hyp.S
> +++ b/arch/arm64/kvm/hyp.S
> @@ -645,6 +645,28 @@ ENTRY(__kvm_tlb_flush_vmid_ipa)
>  	ret
>  ENDPROC(__kvm_tlb_flush_vmid_ipa)
>  
> +/**
> + * void __kvm_tlb_flush_vmid(struct kvm *kvm) - Flush per-VMID TLBs
> + * @struc kvm *kvm - pointer to kvm structure

struct

> + *
> + * Invalidates all Stage 1 and 2 TLB entries for current VMID.
> + */
> +ENTRY(__kvm_tlb_flush_vmid)
> +	dsb     ishst
> +
> +	kern_hyp_va     x0
> +	ldr     x2, [x0, #KVM_VTTBR]
> +	msr     vttbr_el2, x2
> +	isb
> +
> +	tlbi    vmalls12e1is
> +	dsb     ish
> +	isb
> +
> +	msr     vttbr_el2, xzr
> +	ret
> +ENDPROC(__kvm_tlb_flush_vmid)
> +
>  ENTRY(__kvm_flush_vm_context)
>  	dsb	ishst
>  	tlbi	alle1is
> -- 
> 1.9.1
> 
Looks good to me:

Reviewed-by: Christoffer Dall <christoffer.dall at linaro.org>