From: Yi Liu <yi.l.liu@intel.com>
To: "zhangfei.gao@foxmail.com" <zhangfei.gao@foxmail.com>,
Jason Gunthorpe <jgg@nvidia.com>,
Zhangfei Gao <zhangfei.gao@linaro.org>
Cc: <eric.auger@redhat.com>,
Alex Williamson <alex.williamson@redhat.com>,
Shameerali Kolothum Thodi <shameerali.kolothum.thodi@huawei.com>,
"cohuck@redhat.com" <cohuck@redhat.com>,
"qemu-devel@nongnu.org" <qemu-devel@nongnu.org>,
"david@gibson.dropbear.id.au" <david@gibson.dropbear.id.au>,
"thuth@redhat.com" <thuth@redhat.com>,
"farman@linux.ibm.com" <farman@linux.ibm.com>,
"mjrosato@linux.ibm.com" <mjrosato@linux.ibm.com>,
"akrowiak@linux.ibm.com" <akrowiak@linux.ibm.com>,
"pasic@linux.ibm.com" <pasic@linux.ibm.com>,
"jjherne@linux.ibm.com" <jjherne@linux.ibm.com>,
"jasowang@redhat.com" <jasowang@redhat.com>,
"kvm@vger.kernel.org" <kvm@vger.kernel.org>,
"nicolinc@nvidia.com" <nicolinc@nvidia.com>,
"eric.auger.pro@gmail.com" <eric.auger.pro@gmail.com>,
"kevin.tian@intel.com" <kevin.tian@intel.com>,
"chao.p.peng@intel.com" <chao.p.peng@intel.com>,
"yi.y.sun@intel.com" <yi.y.sun@intel.com>,
"peterx@redhat.com" <peterx@redhat.com>
Subject: Re: [RFC 00/18] vfio: Adopt iommufd
Date: Tue, 17 May 2022 16:55:32 +0800 [thread overview]
Message-ID: <faff3515-896c-a445-ebbe-f7077cb52dd4@intel.com> (raw)
In-Reply-To: <tencent_B5689033C2703B476DA909302DA141A0A305@qq.com>
Hi Zhangfei,
On 2022/5/12 17:01, zhangfei.gao@foxmail.com wrote:
>
> Hi, Yi
>
> On 2022/5/11 下午10:17, zhangfei.gao@foxmail.com wrote:
>>
>>
>> On 2022/5/10 下午10:08, Yi Liu wrote:
>>> On 2022/5/10 20:45, Jason Gunthorpe wrote:
>>>> On Tue, May 10, 2022 at 08:35:00PM +0800, Zhangfei Gao wrote:
>>>>> Thanks Yi and Eric,
>>>>> Then will wait for the updated iommufd kernel for the PCI MMIO region.
>>>>>
>>>>> Another question,
>>>>> How to get the iommu_domain in the ioctl.
>>>>
>>>> The ID of the iommu_domain (called the hwpt) it should be returned by
>>>> the vfio attach ioctl.
>>>
>>> yes, hwpt_id is returned by the vfio attach ioctl and recorded in
>>> qemu. You can query page table related capabilities with this id.
>>>
>>> https://lore.kernel.org/kvm/20220414104710.28534-16-yi.l.liu@intel.com/
>>>
>> Thanks Yi,
>>
>> Do we use iommufd_hw_pagetable_from_id in kernel?
>>
>> The qemu send hwpt_id via ioctl.
>> Currently VFIOIOMMUFDContainer has hwpt_list,
>> Which member is good to save hwpt_id, IOMMUTLBEntry?
>
> Can VFIOIOMMUFDContainer have multi hwpt?
yes, it is possible
> Since VFIOIOMMUFDContainer has hwpt_list now.
> If so, how to get specific hwpt from map/unmap_notify in hw/vfio/as.c,
> where no vbasedev can be used for compare.
>
> I am testing with a workaround, adding VFIOIOASHwpt *hwpt in
> VFIOIOMMUFDContainer.
> And save hwpt when vfio_device_attach_container.
>
>>
>> In kernel ioctl: iommufd_vfio_ioctl
>> @dev: Device to get an iommu_domain for
>> iommufd_hw_pagetable_from_id(struct iommufd_ctx *ictx, u32 pt_id, struct
>> device *dev)
>> But iommufd_vfio_ioctl seems no para dev?
>
> We can set dev=Null since IOMMUFD_OBJ_HW_PAGETABLE does not need dev.
> iommufd_hw_pagetable_from_id(ictx, hwpt_id, NULL)
this is not good. dev is passed in to this function to allocate domain
and also check sw_msi things. If you pass in a NULL, it may even unable
to get a domain for the hwpt. It won't work I guess.
> Thanks
>>
>
--
Regards,
Yi Liu
next prev parent reply other threads:[~2022-05-17 8:56 UTC|newest]
Thread overview: 75+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-04-14 10:46 [RFC 00/18] vfio: Adopt iommufd Yi Liu
2022-04-14 10:46 ` [RFC 01/18] scripts/update-linux-headers: Add iommufd.h Yi Liu
2022-04-14 10:46 ` [RFC 02/18] linux-headers: Import latest vfio.h and iommufd.h Yi Liu
2022-04-14 10:46 ` [RFC 03/18] hw/vfio/pci: fix vfio_pci_hot_reset_result trace point Yi Liu
2022-04-14 10:46 ` [RFC 04/18] vfio/pci: Use vbasedev local variable in vfio_realize() Yi Liu
2022-04-14 10:46 ` [RFC 05/18] vfio/common: Rename VFIOGuestIOMMU::iommu into ::iommu_mr Yi Liu
2022-04-14 10:46 ` [RFC 07/18] vfio: Add base object for VFIOContainer Yi Liu
2022-04-29 6:29 ` David Gibson
2022-05-03 13:05 ` Yi Liu
2022-04-14 10:47 ` [RFC 08/18] vfio/container: Introduce vfio_[attach/detach]_device Yi Liu
2022-04-14 10:47 ` [RFC 09/18] vfio/platform: Use vfio_[attach/detach]_device Yi Liu
2022-04-14 10:47 ` [RFC 10/18] vfio/ap: " Yi Liu
2022-04-14 10:47 ` [RFC 11/18] vfio/ccw: " Yi Liu
2022-04-14 10:47 ` [RFC 12/18] vfio/container-obj: Introduce [attach/detach]_device container callbacks Yi Liu
2022-04-14 10:47 ` [RFC 13/18] vfio/container-obj: Introduce VFIOContainer reset callback Yi Liu
2022-04-14 10:47 ` [RFC 14/18] hw/iommufd: Creation Yi Liu
2022-04-14 10:47 ` [RFC 15/18] vfio/iommufd: Implement iommufd backend Yi Liu
2022-04-22 14:58 ` Jason Gunthorpe
2022-04-22 21:33 ` Alex Williamson
2022-04-26 9:55 ` Yi Liu
2022-04-26 10:41 ` Tian, Kevin
2022-04-26 13:41 ` Jason Gunthorpe
2022-04-26 14:08 ` Yi Liu
2022-04-26 14:11 ` Jason Gunthorpe
2022-04-26 18:45 ` Alex Williamson
2022-04-26 19:27 ` Jason Gunthorpe
2022-04-26 20:59 ` Alex Williamson
2022-04-26 23:08 ` Jason Gunthorpe
2022-04-26 13:53 ` Jason Gunthorpe
2022-04-14 10:47 ` [RFC 16/18] vfio/iommufd: Add IOAS_COPY_DMA support Yi Liu
2022-04-14 10:47 ` [RFC 17/18] vfio/as: Allow the selection of a given iommu backend Yi Liu
2022-04-14 10:47 ` [RFC 18/18] vfio/pci: Add an iommufd option Yi Liu
2022-04-15 8:37 ` [RFC 00/18] vfio: Adopt iommufd Nicolin Chen
2022-04-17 10:30 ` Eric Auger
2022-04-19 3:26 ` Nicolin Chen
2022-04-25 19:40 ` Eric Auger
2022-04-18 8:49 ` Tian, Kevin
2022-04-18 12:09 ` Yi Liu
2022-04-25 19:51 ` Eric Auger
2022-04-25 19:55 ` Eric Auger
2022-04-26 8:39 ` Tian, Kevin
2022-04-22 22:09 ` Alex Williamson
2022-04-25 10:10 ` Daniel P. Berrangé
2022-04-25 13:36 ` Jason Gunthorpe
2022-04-25 14:37 ` Alex Williamson
2022-04-26 8:37 ` Tian, Kevin
2022-04-26 12:33 ` Jason Gunthorpe
2022-04-26 16:21 ` Alex Williamson
2022-04-26 16:42 ` Jason Gunthorpe
2022-04-26 19:24 ` Alex Williamson
2022-04-26 19:36 ` Jason Gunthorpe
2022-04-28 3:21 ` Tian, Kevin
2022-04-28 14:24 ` Alex Williamson
2022-04-28 16:20 ` Daniel P. Berrangé
2022-04-29 0:45 ` Tian, Kevin
2022-04-25 20:23 ` Eric Auger
2022-04-25 22:53 ` Alex Williamson
2022-04-26 9:47 ` Shameerali Kolothum Thodi
2022-04-26 11:44 ` Eric Auger
2022-04-26 12:43 ` Shameerali Kolothum Thodi
2022-04-26 16:35 ` Alex Williamson
2022-05-09 14:24 ` Zhangfei Gao
2022-05-10 3:17 ` Yi Liu
2022-05-10 6:51 ` Eric Auger
2022-05-10 12:35 ` Zhangfei Gao
2022-05-10 12:45 ` Jason Gunthorpe
2022-05-10 14:08 ` Yi Liu
2022-05-11 14:17 ` zhangfei.gao
2022-05-12 9:01 ` zhangfei.gao
2022-05-17 8:55 ` Yi Liu [this message]
2022-05-18 7:22 ` zhangfei.gao
2022-05-18 14:00 ` Yi Liu
2022-06-28 8:14 ` Shameerali Kolothum Thodi
2022-06-28 8:58 ` Eric Auger
2022-05-17 8:52 ` Yi Liu
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