From: Joerg Roedel <joro@8bytes.org>
To: Jean-Philippe Brucker <jean-philippe.brucker@arm.com>
Cc: mark.rutland@arm.com, devicetree@vger.kernel.org,
lorenzo.pieralisi@arm.com, linux-pci@vger.kernel.org,
thunder.leizhen@huawei.com, rjw@rjwysocki.net,
will.deacon@arm.com, okaya@codeaurora.org,
linux-acpi@vger.kernel.org, iommu@lists.linux-foundation.org,
robh+dt@kernel.org, hanjun.guo@linaro.org, sudeep.holla@arm.com,
bhelgaas@google.com, tn@semihalf.com, sunil.kovvuri@gmail.com,
robin.murphy@arm.com, linux-arm-kernel@lists.infradead.org,
lenb@kernel.org
Subject: Re: [PATCH 6/7] iommu/arm-smmu-v3: Add support for PCI ATS
Date: Tue, 30 May 2017 12:28:31 +0200 [thread overview]
Message-ID: <20170530102831.GJ2818@8bytes.org> (raw)
In-Reply-To: <20170524180143.19855-7-jean-philippe.brucker@arm.com>
On Wed, May 24, 2017 at 07:01:42PM +0100, Jean-Philippe Brucker wrote:
> * TLB invalidation by range is batched and committed with a single sync.
> Batching ATC invalidation is inconvenient, endpoints limit the number of
> inflight invalidations. We'd have to count the number of invalidations
> queued and send a sync periodically. In addition, I suspect we always
> need a sync between TLB and ATC invalidation for the same page.
This sounds like the number of outstanding ATS invalidations is not
managed by the SMMU hardware, is that right?
Joerg
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next prev parent reply other threads:[~2017-05-30 10:28 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-05-24 18:01 [PATCH 0/7] Add PCI ATS support to SMMUv3 Jean-Philippe Brucker
2017-05-24 18:01 ` [PATCH 1/7] PCI: Move ATS declarations outside of CONFIG_PCI Jean-Philippe Brucker
2017-05-24 18:01 ` [PATCH 2/7] dt-bindings: PCI: Describe ATS property for root complex nodes Jean-Philippe Brucker
2017-05-30 10:01 ` Joerg Roedel
2017-05-30 10:58 ` Jean-Philippe Brucker
2017-05-31 17:17 ` Rob Herring
2017-05-31 17:23 ` Rob Herring
2017-06-01 12:28 ` Jean-Philippe Brucker
2017-06-05 17:20 ` Rob Herring
2017-06-06 11:11 ` Jean-Philippe Brucker
2017-06-20 11:38 ` Jean-Philippe Brucker
2017-05-24 18:01 ` [PATCH 3/7] iommu/of: Check ATS capability in " Jean-Philippe Brucker
2017-05-24 18:01 ` [PATCH 4/7] ACPI/IORT: " Jean-Philippe Brucker
2017-05-24 18:01 ` [PATCH 5/7] iommu/arm-smmu-v3: Link domains and devices Jean-Philippe Brucker
2017-05-24 18:01 ` [PATCH 6/7] iommu/arm-smmu-v3: Add support for PCI ATS Jean-Philippe Brucker
2017-05-30 10:28 ` Joerg Roedel [this message]
2017-05-30 10:58 ` Jean-Philippe Brucker
2017-05-24 18:01 ` [PATCH 7/7] iommu/arm-smmu-v3: Disable tagged pointers Jean-Philippe Brucker
2017-05-31 15:27 ` [PATCH 0/7] Add PCI ATS support to SMMUv3 Nate Watterson
2017-06-01 12:23 ` Jean-Philippe Brucker
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