linux-kernel - Re: [PATCH 0/4] vDPA: API for reporting IOVA range

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Date:   Thu, 22 Oct 2020 13:47:19 +0800
From:   Jason Wang <jasowang@...hat.com>
To:     "Michael S. Tsirkin" <mst@...hat.com>
Cc:     virtualization@...ts.linux-foundation.org,
        linux-kernel@...r.kernel.org, rob.miller@...adcom.com,
        lingshan.zhu@...el.com, eperezma@...hat.com, lulu@...hat.com,
        shahafs@...lanox.com, hanand@...inx.com, mhabets@...arflare.com,
        gdawar@...inx.com, saugatm@...inx.com, vmireyno@...vell.com,
        zhangweining@...jie.com.cn, eli@...lanox.com
Subject: Re: [PATCH 0/4] vDPA: API for reporting IOVA range


On 2020/10/21 下午10:45, Michael S. Tsirkin wrote:
> On Wed, Jun 17, 2020 at 11:29:43AM +0800, Jason Wang wrote:
>> Hi All:
>>
>> This series introduces API for reporing IOVA range. This is a must for
>> userspace to work correclty:
>>
>> - for the process that uses vhost-vDPA directly to properly allocate
>>    IOVA
>> - for VM(qemu), when vIOMMU is not enabled, fail early if GPA is out
>>    of range
>> - for VM(qemu), when vIOMMU is enabled, determine a valid guest
>>    address width
>>
>> Please review.
>>
>> Thanks
> OK so what is the plan here? Change begin-end->first-last and repost?


I've posted V2 with this change, but it get some warning for buildbot.

Will post a V3.

Thanks


>
>> Jason Wang (4):
>>    vdpa: introduce config op to get valid iova range
>>    vdpa_sim: implement get_iova_range bus operation
>>    vdpa: get_iova_range() is mandatory for device specific DMA
>>      translation
>>    vhost: vdpa: report iova range
>>
>>   drivers/vdpa/vdpa.c              |  4 ++++
>>   drivers/vdpa/vdpa_sim/vdpa_sim.c | 11 +++++++++++
>>   drivers/vhost/vdpa.c             | 27 +++++++++++++++++++++++++++
>>   include/linux/vdpa.h             | 14 ++++++++++++++
>>   include/uapi/linux/vhost.h       |  4 ++++
>>   include/uapi/linux/vhost_types.h |  5 +++++
>>   6 files changed, 65 insertions(+)
>>
>> -- 
>> 2.20.1