From: Jean-Philippe Brucker <jean-philippe@linaro.org>
To: Jacob Pan <jacob.jun.pan@linux.intel.com>
Cc: "Tian, Kevin" <kevin.tian@intel.com>,
Raj Ashok <ashok.raj@intel.com>,
iommu@lists.linux-foundation.org,
LKML <linux-kernel@vger.kernel.org>,
Alex Williamson <alex.williamson@redhat.com>,
David Woodhouse <dwmw2@infradead.org>,
Jonathan Cameron <jic23@kernel.org>
Subject: Re: [PATCH 1/4] iommu: Introduce cache_invalidate API
Date: Fri, 20 Sep 2019 18:32:34 +0200 [thread overview]
Message-ID: <20190920163234.GA1533866@lophozonia> (raw)
In-Reply-To: <1568849194-47874-2-git-send-email-jacob.jun.pan@linux.intel.com>
On Wed, Sep 18, 2019 at 04:26:31PM -0700, Jacob Pan wrote:
> From: Yi L Liu <yi.l.liu@intel.com>
>
> In any virtualization use case, when the first translation stage
> is "owned" by the guest OS, the host IOMMU driver has no knowledge
> of caching structure updates unless the guest invalidation activities
> are trapped by the virtualizer and passed down to the host.
>
> Since the invalidation data can be obtained from user space and will be
> written into physical IOMMU, we must allow security check at various
> layers. Therefore, generic invalidation data format are proposed here,
> model specific IOMMU drivers need to convert them into their own format.
>
> Signed-off-by: Yi L Liu <yi.l.liu@intel.com>
> Signed-off-by: Jacob Pan <jacob.jun.pan@linux.intel.com>
> Signed-off-by: Ashok Raj <ashok.raj@intel.com>
> Signed-off-by: Eric Auger <eric.auger@redhat.com>
> Signed-off-by: Jean-Philippe Brucker <jean-philippe.brucker@arm.com>
I tried to take a fresh look at this and didn't see anything
problematic, though I might have been the last one to edit it. Anyway:
Reviewed-by: Jean-Philippe Brucker <jean-philippe@linaro.org>
_______________________________________________
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iommu@lists.linux-foundation.org
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next prev parent reply other threads:[~2019-09-20 16:32 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-18 23:26 [PATCH 0/4] User API for nested shared virtual address (SVA) Jacob Pan
2019-09-18 23:26 ` [PATCH 1/4] iommu: Introduce cache_invalidate API Jacob Pan
2019-09-20 16:32 ` Jean-Philippe Brucker [this message]
2019-09-18 23:26 ` [PATCH 2/4] iommu: Add I/O ASID allocator Jacob Pan
2019-09-19 6:30 ` kbuild test robot
2019-09-20 16:33 ` Jean-Philippe Brucker
2019-09-18 23:26 ` [PATCH 3/4] iommu/ioasid: Add custom allocators Jacob Pan
2019-09-20 16:35 ` Jean-Philippe Brucker
2019-09-21 17:42 ` Jacob Pan
2019-09-18 23:26 ` [PATCH 4/4] iommu: Introduce guest PASID bind function Jacob Pan
2019-09-20 16:38 ` Jean-Philippe Brucker
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