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Re: [RFC 00/18] vfio: Adopt iommufd
From: |
Yi Liu |
Subject: |
Re: [RFC 00/18] vfio: Adopt iommufd |
Date: |
Tue, 17 May 2022 16:52:19 +0800 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Firefox/91.0 Thunderbird/91.7.0 |
Hi Zhangfei,
On 2022/5/11 22:17, 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?
currently, we don't make use of hwpt yet in the version we have
in the qemu branch. I have a change to make use of it. Also, it
would be used in future for nested translation setup and also
dirty page bit support query for a given domain.
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?
there is. you can look at the vfio_group_set_iommufd(), it loops the
device_list provided by vfio. And the device info is passed to iommufd.
Thanks
--
Regards,
Yi Liu
- Re: [RFC 00/18] vfio: Adopt iommufd, (continued)
- Re: [RFC 00/18] vfio: Adopt iommufd, Yi Liu, 2022/05/09
- Re: [RFC 00/18] vfio: Adopt iommufd, Eric Auger, 2022/05/10
- Re: [RFC 00/18] vfio: Adopt iommufd, Zhangfei Gao, 2022/05/10
- Re: [RFC 00/18] vfio: Adopt iommufd, Jason Gunthorpe, 2022/05/10
- Re: [RFC 00/18] vfio: Adopt iommufd, Yi Liu, 2022/05/10
- Re: [RFC 00/18] vfio: Adopt iommufd, address@hidden, 2022/05/11
- Re: [RFC 00/18] vfio: Adopt iommufd, address@hidden, 2022/05/12
- Re: [RFC 00/18] vfio: Adopt iommufd, Yi Liu, 2022/05/17
- Re: [RFC 00/18] vfio: Adopt iommufd, address@hidden, 2022/05/18
- Re: [RFC 00/18] vfio: Adopt iommufd, Yi Liu, 2022/05/18
- Re: [RFC 00/18] vfio: Adopt iommufd,
Yi Liu <=