linux-kernel - Re: [PATCH 1/1] iommu/amd: make sure TLB to be flushed before IOVA freed

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Message-ID: <20180706112154.hslaptjtlsj5whgy@8bytes.org>
Date:   Fri, 6 Jul 2018 13:21:54 +0200
From:   Joerg Roedel <joro@...tes.org>
To:     Zhen Lei <thunder.leizhen@...wei.com>
Cc:     iommu <iommu@...ts.linux-foundation.org>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        Robin Murphy <robin.murphy@....com>
Subject: Re: [PATCH 1/1] iommu/amd: make sure TLB to be flushed before IOVA
 freed

On Wed, Jun 06, 2018 at 10:18:46AM +0800, Zhen Lei wrote:
> Although the mapping has already been removed in the page table, it maybe
> still exist in TLB. Suppose the freed IOVAs is reused by others before the
> flush operation completed, the new user can not correctly access to its
> meomory.
> 
> Signed-off-by: Zhen Lei <thunder.leizhen@...wei.com>
> ---
>  drivers/iommu/amd_iommu.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)

Applied, thanks.