linux-kernel - Re: [Patch Part3 V5 0/8] Enable support of Intel DMAR device hotplug

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Date:	Tue, 16 Sep 2014 15:17:30 +0800
From:	Jiang Liu <jiang.liu@...ux.intel.com>
To:	Yijing Wang <wangyijing@...wei.com>,
	Joerg Roedel <joro@...tes.org>,
	David Woodhouse <dwmw2@...radead.org>,
	Yinghai Lu <yinghai@...nel.org>,
	Bjorn Helgaas <bhelgaas@...gle.com>,
	Dan Williams <dan.j.williams@...el.com>,
	Vinod Koul <vinod.koul@...el.com>,
	"Rafael J . Wysocki" <rafael.j.wysocki@...el.com>
CC:	Ashok Raj <ashok.raj@...el.com>, Tony Luck <tony.luck@...el.com>,
	iommu@...ts.linux-foundation.org, linux-pci@...r.kernel.org,
	linux-hotplug@...r.kernel.org, linux-kernel@...r.kernel.org,
	dmaengine@...r.kernel.org
Subject: Re: [Patch Part3 V5 0/8] Enable support of Intel DMAR device hotplug



On 2014/9/15 15:54, Yijing Wang wrote:
> I built and boot this series in Huawei RH5885 (Intel(R) Xeon(R) CPU E7- 4807, two IOHs and two IOMMUs),
> It works fine, IRQ remap and DMA remap are both look good.
> But because my platform BIOS has no _DSM, so I didn't test the hotplug case yet.
> 
> Thanks!
> Yijing.
Hi Yijing,
	Thanks for your great effort to review and test this patch set!
Regards!
Gerry
> 
> 
> On 2014/9/12 10:10, Jiang Liu wrote:
>> When hot plugging a descrete IOH or a physical processor with embedded
>> IIO, we need to handle DMAR(or IOMMU) unit in the PCIe host bridge if
>> DMAR is in use. This patch set tries to enhance current DMAR/IOMMU/IR
>> drivers to support hotplug and is based on latest Linus master branch.
>>
>> All prerequisite patches to support DMAR device hotplug have been merged
>> into the mainstream kernel, and this is the last patch set to enable
>> DMAR device hotplug.
>>
>> You may access the patch set at:
>> https://github.com/jiangliu/linux.git iommu/hotplug_v5
>>
>> This patch set has been tested on Intel development machine.
>> Appreciate any comments and tests.
>>
>> Patch 1-4 enhances DMAR framework to support hotplug
>> Patch 5 enhances Intel interrupt remapping driver to support hotplug
>> Patch 6 enhances error handling in Intel IR driver
>> Patch 7 enhance Intel IOMMU to support hotplug
>> Patch 8 enhance ACPI pci_root driver to handle DMAR units
>>
>> Jiang Liu (8):
>>   iommu/vt-d: Introduce helper function dmar_walk_resources()
>>   iommu/vt-d: Dynamically allocate and free seq_id for DMAR units
>>   iommu/vt-d: Implement DMAR unit hotplug framework
>>   iommu/vt-d: Search for ACPI _DSM method for DMAR hotplug
>>   iommu/vt-d: Enhance intel_irq_remapping driver to support DMAR unit
>>     hotplug
>>   iommu/vt-d: Enhance error recovery in function
>>     intel_enable_irq_remapping()
>>   iommu/vt-d: Enhance intel-iommu driver to support DMAR unit hotplug
>>   pci, ACPI, iommu: Enhance pci_root to support DMAR device hotplug
>>
>>  drivers/acpi/pci_root.c             |   16 +-
>>  drivers/iommu/dmar.c                |  532 ++++++++++++++++++++++++++++-------
>>  drivers/iommu/intel-iommu.c         |  297 ++++++++++++++-----
>>  drivers/iommu/intel_irq_remapping.c |  233 +++++++++++----
>>  include/linux/dmar.h                |   50 +++-
>>  5 files changed, 888 insertions(+), 240 deletions(-)
>>
> 
> 
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