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Re: [RFC 00/18] vfio: Adopt iommufd
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address@hidden |
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Re: [RFC 00/18] vfio: Adopt iommufd |
Date: |
Thu, 12 May 2022 17:01:26 +0800 |
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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?
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)
Thanks
- Re: [RFC 00/18] vfio: Adopt iommufd, Zhangfei Gao, 2022/05/09
- 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 <=
- 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, 2022/05/17