From: "Tian, Kevin" <kevin.tian@intel.com>
To: David Gibson <david@gibson.dropbear.id.au>,
Jason Gunthorpe <jgg@nvidia.com>
Cc: Alex Williamson <alex.williamson@redhat.com>,
Lu Baolu <baolu.lu@linux.intel.com>,
Chaitanya Kulkarni <chaitanyak@nvidia.com>,
Cornelia Huck <cohuck@redhat.com>,
Daniel Jordan <daniel.m.jordan@oracle.com>,
Eric Auger <eric.auger@redhat.com>,
"iommu@lists.linux-foundation.org"
<iommu@lists.linux-foundation.org>,
"Jason Wang" <jasowang@redhat.com>,
Jean-Philippe Brucker <jean-philippe@linaro.org>,
"Martins, Joao" <joao.m.martins@oracle.com>,
"kvm@vger.kernel.org" <kvm@vger.kernel.org>,
Matthew Rosato <mjrosato@linux.ibm.com>,
"Michael S. Tsirkin" <mst@redhat.com>,
Nicolin Chen <nicolinc@nvidia.com>,
Niklas Schnelle <schnelle@linux.ibm.com>,
"Shameerali Kolothum Thodi"
<shameerali.kolothum.thodi@huawei.com>,
"Liu, Yi L" <yi.l.liu@intel.com>,
Keqian Zhu <zhukeqian1@huawei.com>
Subject: RE: [PATCH RFC 08/12] iommufd: IOCTLs for the io_pagetable
Date: Thu, 31 Mar 2022 05:41:23 +0000 [thread overview]
Message-ID: <BN9PR11MB52761227DFAC6E3D322BEDF98CE19@BN9PR11MB5276.namprd11.prod.outlook.com> (raw)
In-Reply-To: <YkUvzfHM00FEAemt@yekko>
> From: David Gibson <david@gibson.dropbear.id.au>
> Sent: Thursday, March 31, 2022 12:36 PM
> > +
> > +/**
> > + * struct iommu_ioas_iova_ranges - ioctl(IOMMU_IOAS_IOVA_RANGES)
> > + * @size: sizeof(struct iommu_ioas_iova_ranges)
> > + * @ioas_id: IOAS ID to read ranges from
> > + * @out_num_iovas: Output total number of ranges in the IOAS
> > + * @__reserved: Must be 0
> > + * @out_valid_iovas: Array of valid IOVA ranges. The array length is the
> smaller
> > + * of out_num_iovas or the length implied by size.
> > + * @out_valid_iovas.start: First IOVA in the allowed range
> > + * @out_valid_iovas.last: Inclusive last IOVA in the allowed range
> > + *
> > + * Query an IOAS for ranges of allowed IOVAs. Operation outside these
> ranges is
> > + * not allowed. out_num_iovas will be set to the total number of iovas
> > + * and the out_valid_iovas[] will be filled in as space permits.
> > + * size should include the allocated flex array.
> > + */
> > +struct iommu_ioas_iova_ranges {
> > + __u32 size;
> > + __u32 ioas_id;
> > + __u32 out_num_iovas;
> > + __u32 __reserved;
> > + struct iommu_valid_iovas {
> > + __aligned_u64 start;
> > + __aligned_u64 last;
> > + } out_valid_iovas[];
> > +};
> > +#define IOMMU_IOAS_IOVA_RANGES _IO(IOMMUFD_TYPE,
> IOMMUFD_CMD_IOAS_IOVA_RANGES)
>
> Is the information returned by this valid for the lifeime of the IOAS,
> or can it change? If it can change, what events can change it?
>
It can change when a new device is attached to an ioas.
You can look at iopt_table_enforce_group_resv_regions() in patch7
which is called by iommufd_device_attach() in patch10. That function
will first check whether new reserved ranges from the attached device
have been used and if no conflict then add them to the list of reserved
ranges of this ioas.
Userspace can call this ioctl to retrieve updated IOVA range info after
attaching a device.
Thanks
Kevin
WARNING: multiple messages have this Message-ID (diff)
From: "Tian, Kevin" <kevin.tian@intel.com>
To: David Gibson <david@gibson.dropbear.id.au>,
Jason Gunthorpe <jgg@nvidia.com>
Cc: Jean-Philippe Brucker <jean-philippe@linaro.org>,
Chaitanya Kulkarni <chaitanyak@nvidia.com>,
"kvm@vger.kernel.org" <kvm@vger.kernel.org>,
"Michael S. Tsirkin" <mst@redhat.com>,
Jason Wang <jasowang@redhat.com>,
Cornelia Huck <cohuck@redhat.com>,
Niklas Schnelle <schnelle@linux.ibm.com>,
"iommu@lists.linux-foundation.org"
<iommu@lists.linux-foundation.org>,
Daniel Jordan <daniel.m.jordan@oracle.com>,
Alex Williamson <alex.williamson@redhat.com>,
"Martins, Joao" <joao.m.martins@oracle.com>
Subject: RE: [PATCH RFC 08/12] iommufd: IOCTLs for the io_pagetable
Date: Thu, 31 Mar 2022 05:41:23 +0000 [thread overview]
Message-ID: <BN9PR11MB52761227DFAC6E3D322BEDF98CE19@BN9PR11MB5276.namprd11.prod.outlook.com> (raw)
In-Reply-To: <YkUvzfHM00FEAemt@yekko>
> From: David Gibson <david@gibson.dropbear.id.au>
> Sent: Thursday, March 31, 2022 12:36 PM
> > +
> > +/**
> > + * struct iommu_ioas_iova_ranges - ioctl(IOMMU_IOAS_IOVA_RANGES)
> > + * @size: sizeof(struct iommu_ioas_iova_ranges)
> > + * @ioas_id: IOAS ID to read ranges from
> > + * @out_num_iovas: Output total number of ranges in the IOAS
> > + * @__reserved: Must be 0
> > + * @out_valid_iovas: Array of valid IOVA ranges. The array length is the
> smaller
> > + * of out_num_iovas or the length implied by size.
> > + * @out_valid_iovas.start: First IOVA in the allowed range
> > + * @out_valid_iovas.last: Inclusive last IOVA in the allowed range
> > + *
> > + * Query an IOAS for ranges of allowed IOVAs. Operation outside these
> ranges is
> > + * not allowed. out_num_iovas will be set to the total number of iovas
> > + * and the out_valid_iovas[] will be filled in as space permits.
> > + * size should include the allocated flex array.
> > + */
> > +struct iommu_ioas_iova_ranges {
> > + __u32 size;
> > + __u32 ioas_id;
> > + __u32 out_num_iovas;
> > + __u32 __reserved;
> > + struct iommu_valid_iovas {
> > + __aligned_u64 start;
> > + __aligned_u64 last;
> > + } out_valid_iovas[];
> > +};
> > +#define IOMMU_IOAS_IOVA_RANGES _IO(IOMMUFD_TYPE,
> IOMMUFD_CMD_IOAS_IOVA_RANGES)
>
> Is the information returned by this valid for the lifeime of the IOAS,
> or can it change? If it can change, what events can change it?
>
It can change when a new device is attached to an ioas.
You can look at iopt_table_enforce_group_resv_regions() in patch7
which is called by iommufd_device_attach() in patch10. That function
will first check whether new reserved ranges from the attached device
have been used and if no conflict then add them to the list of reserved
ranges of this ioas.
Userspace can call this ioctl to retrieve updated IOVA range info after
attaching a device.
Thanks
Kevin
_______________________________________________
iommu mailing list
iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu
next prev parent reply other threads:[~2022-03-31 5:41 UTC|newest]
Thread overview: 244+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-03-18 17:27 [PATCH RFC 00/12] IOMMUFD Generic interface Jason Gunthorpe
2022-03-18 17:27 ` Jason Gunthorpe via iommu
2022-03-18 17:27 ` [PATCH RFC 01/12] interval-tree: Add a utility to iterate over spans in an interval tree Jason Gunthorpe
2022-03-18 17:27 ` Jason Gunthorpe via iommu
2022-03-18 17:27 ` [PATCH RFC 02/12] iommufd: Overview documentation Jason Gunthorpe
2022-03-18 17:27 ` Jason Gunthorpe via iommu
2022-03-18 17:27 ` [PATCH RFC 03/12] iommufd: File descriptor, context, kconfig and makefiles Jason Gunthorpe
2022-03-18 17:27 ` Jason Gunthorpe via iommu
2022-03-22 14:18 ` Niklas Schnelle
2022-03-22 14:18 ` Niklas Schnelle
2022-03-22 14:50 ` Jason Gunthorpe
2022-03-22 14:50 ` Jason Gunthorpe via iommu
2022-03-18 17:27 ` [PATCH RFC 04/12] kernel/user: Allow user::locked_vm to be usable for iommufd Jason Gunthorpe
2022-03-18 17:27 ` Jason Gunthorpe via iommu
2022-03-22 14:28 ` Niklas Schnelle
2022-03-22 14:28 ` Niklas Schnelle
2022-03-22 14:57 ` Jason Gunthorpe
2022-03-22 14:57 ` Jason Gunthorpe via iommu
2022-03-22 15:29 ` Alex Williamson
2022-03-22 15:29 ` Alex Williamson
2022-03-22 16:15 ` Jason Gunthorpe
2022-03-22 16:15 ` Jason Gunthorpe via iommu
2022-03-24 2:11 ` Tian, Kevin
2022-03-24 2:11 ` Tian, Kevin
2022-03-24 2:27 ` Jason Wang
2022-03-24 2:27 ` Jason Wang
2022-03-24 2:42 ` Tian, Kevin
2022-03-24 2:42 ` Tian, Kevin
2022-03-24 2:57 ` Jason Wang
2022-03-24 2:57 ` Jason Wang
2022-03-24 3:15 ` Tian, Kevin
2022-03-24 3:15 ` Tian, Kevin
2022-03-24 3:50 ` Jason Wang
2022-03-24 3:50 ` Jason Wang
2022-03-24 4:29 ` Tian, Kevin
2022-03-24 4:29 ` Tian, Kevin
2022-03-24 11:46 ` Jason Gunthorpe
2022-03-24 11:46 ` Jason Gunthorpe via iommu
2022-03-28 1:53 ` Jason Wang
2022-03-28 1:53 ` Jason Wang
2022-03-28 12:22 ` Jason Gunthorpe
2022-03-28 12:22 ` Jason Gunthorpe via iommu
2022-03-29 4:59 ` Jason Wang
2022-03-29 4:59 ` Jason Wang
2022-03-29 11:46 ` Jason Gunthorpe
2022-03-29 11:46 ` Jason Gunthorpe via iommu
2022-03-28 13:14 ` Sean Mooney
2022-03-28 13:14 ` Sean Mooney
2022-03-28 14:27 ` Jason Gunthorpe via iommu
2022-03-28 14:27 ` Jason Gunthorpe
2022-03-24 20:40 ` Alex Williamson
2022-03-24 20:40 ` Alex Williamson
2022-03-24 22:27 ` Jason Gunthorpe
2022-03-24 22:27 ` Jason Gunthorpe via iommu
2022-03-24 22:41 ` Alex Williamson
2022-03-24 22:41 ` Alex Williamson
2022-03-22 16:31 ` Niklas Schnelle
2022-03-22 16:31 ` Niklas Schnelle
2022-03-22 16:41 ` Jason Gunthorpe via iommu
2022-03-22 16:41 ` Jason Gunthorpe
2022-03-18 17:27 ` [PATCH RFC 05/12] iommufd: PFN handling for iopt_pages Jason Gunthorpe
2022-03-18 17:27 ` Jason Gunthorpe via iommu
2022-03-23 15:37 ` Niklas Schnelle
2022-03-23 15:37 ` Niklas Schnelle
2022-03-23 16:09 ` Jason Gunthorpe
2022-03-23 16:09 ` Jason Gunthorpe via iommu
2022-03-18 17:27 ` [PATCH RFC 06/12] iommufd: Algorithms for PFN storage Jason Gunthorpe
2022-03-18 17:27 ` Jason Gunthorpe via iommu
2022-03-18 17:27 ` [PATCH RFC 07/12] iommufd: Data structure to provide IOVA to PFN mapping Jason Gunthorpe
2022-03-18 17:27 ` Jason Gunthorpe via iommu
2022-03-22 22:15 ` Alex Williamson
2022-03-22 22:15 ` Alex Williamson
2022-03-23 18:15 ` Jason Gunthorpe
2022-03-23 18:15 ` Jason Gunthorpe via iommu
2022-03-24 3:09 ` Tian, Kevin
2022-03-24 3:09 ` Tian, Kevin
2022-03-24 12:46 ` Jason Gunthorpe
2022-03-24 12:46 ` Jason Gunthorpe via iommu
2022-03-25 13:34 ` zhangfei.gao
2022-03-25 13:34 ` zhangfei.gao
2022-03-25 17:19 ` Jason Gunthorpe via iommu
2022-03-25 17:19 ` Jason Gunthorpe
2022-04-13 14:02 ` Yi Liu
2022-04-13 14:02 ` Yi Liu
2022-04-13 14:36 ` Jason Gunthorpe
2022-04-13 14:36 ` Jason Gunthorpe via iommu
2022-04-13 14:49 ` Yi Liu
2022-04-13 14:49 ` Yi Liu
2022-04-17 14:56 ` Yi Liu
2022-04-17 14:56 ` Yi Liu
2022-04-18 10:47 ` Yi Liu
2022-04-18 10:47 ` Yi Liu
2022-03-18 17:27 ` [PATCH RFC 08/12] iommufd: IOCTLs for the io_pagetable Jason Gunthorpe
2022-03-18 17:27 ` Jason Gunthorpe via iommu
2022-03-23 19:10 ` Alex Williamson
2022-03-23 19:10 ` Alex Williamson
2022-03-23 19:34 ` Jason Gunthorpe
2022-03-23 19:34 ` Jason Gunthorpe via iommu
2022-03-23 20:04 ` Alex Williamson
2022-03-23 20:04 ` Alex Williamson
2022-03-23 20:34 ` Jason Gunthorpe via iommu
2022-03-23 20:34 ` Jason Gunthorpe
2022-03-23 22:54 ` Jason Gunthorpe
2022-03-23 22:54 ` Jason Gunthorpe via iommu
2022-03-24 7:25 ` Tian, Kevin
2022-03-24 7:25 ` Tian, Kevin
2022-03-24 13:46 ` Jason Gunthorpe via iommu
2022-03-24 13:46 ` Jason Gunthorpe
2022-03-25 2:15 ` Tian, Kevin
2022-03-25 2:15 ` Tian, Kevin
2022-03-27 2:32 ` Tian, Kevin
2022-03-27 2:32 ` Tian, Kevin
2022-03-27 14:28 ` Jason Gunthorpe
2022-03-27 14:28 ` Jason Gunthorpe via iommu
2022-03-28 17:17 ` Alex Williamson
2022-03-28 17:17 ` Alex Williamson
2022-03-28 18:57 ` Jason Gunthorpe
2022-03-28 18:57 ` Jason Gunthorpe via iommu
2022-03-28 19:47 ` Jason Gunthorpe via iommu
2022-03-28 19:47 ` Jason Gunthorpe
2022-03-28 21:26 ` Alex Williamson
2022-03-28 21:26 ` Alex Williamson
2022-03-24 6:46 ` Tian, Kevin
2022-03-24 6:46 ` Tian, Kevin
2022-03-30 13:35 ` Yi Liu
2022-03-30 13:35 ` Yi Liu
2022-03-31 12:59 ` Jason Gunthorpe via iommu
2022-03-31 12:59 ` Jason Gunthorpe
2022-04-01 13:30 ` Yi Liu
2022-04-01 13:30 ` Yi Liu
2022-03-31 4:36 ` David Gibson
2022-03-31 4:36 ` David Gibson
2022-03-31 5:41 ` Tian, Kevin [this message]
2022-03-31 5:41 ` Tian, Kevin
2022-03-31 12:58 ` Jason Gunthorpe via iommu
2022-03-31 12:58 ` Jason Gunthorpe
2022-04-28 5:58 ` David Gibson
2022-04-28 5:58 ` David Gibson
2022-04-28 14:22 ` Jason Gunthorpe
2022-04-28 14:22 ` Jason Gunthorpe via iommu
2022-04-29 6:00 ` David Gibson
2022-04-29 6:00 ` David Gibson
2022-04-29 12:54 ` Jason Gunthorpe
2022-04-29 12:54 ` Jason Gunthorpe via iommu
2022-04-30 14:44 ` David Gibson
2022-04-30 14:44 ` David Gibson
2022-03-18 17:27 ` [PATCH RFC 09/12] iommufd: Add a HW pagetable object Jason Gunthorpe
2022-03-18 17:27 ` Jason Gunthorpe via iommu
2022-03-18 17:27 ` [PATCH RFC 10/12] iommufd: Add kAPI toward external drivers Jason Gunthorpe
2022-03-18 17:27 ` Jason Gunthorpe via iommu
2022-03-23 18:10 ` Alex Williamson
2022-03-23 18:10 ` Alex Williamson
2022-03-23 18:15 ` Jason Gunthorpe
2022-03-23 18:15 ` Jason Gunthorpe via iommu
2022-05-11 12:54 ` Yi Liu
2022-05-11 12:54 ` Yi Liu
2022-05-19 9:45 ` Yi Liu
2022-05-19 9:45 ` Yi Liu
2022-05-19 12:35 ` Jason Gunthorpe
2022-05-19 12:35 ` Jason Gunthorpe via iommu
2022-03-18 17:27 ` [PATCH RFC 11/12] iommufd: vfio container FD ioctl compatibility Jason Gunthorpe
2022-03-18 17:27 ` Jason Gunthorpe via iommu
2022-03-23 22:51 ` Alex Williamson
2022-03-23 22:51 ` Alex Williamson
2022-03-24 0:33 ` Jason Gunthorpe
2022-03-24 0:33 ` Jason Gunthorpe via iommu
2022-03-24 8:13 ` Eric Auger
2022-03-24 8:13 ` Eric Auger
2022-03-24 22:04 ` Alex Williamson
2022-03-24 22:04 ` Alex Williamson
2022-03-24 23:11 ` Jason Gunthorpe
2022-03-24 23:11 ` Jason Gunthorpe via iommu
2022-03-25 3:10 ` Tian, Kevin
2022-03-25 3:10 ` Tian, Kevin
2022-03-25 11:24 ` Joao Martins
2022-03-25 11:24 ` Joao Martins
2022-04-28 14:53 ` David Gibson
2022-04-28 14:53 ` David Gibson
2022-04-28 15:10 ` Jason Gunthorpe
2022-04-28 15:10 ` Jason Gunthorpe via iommu
2022-04-29 1:21 ` Tian, Kevin
2022-04-29 1:21 ` Tian, Kevin
2022-04-29 6:22 ` David Gibson
2022-04-29 6:22 ` David Gibson
2022-04-29 12:50 ` Jason Gunthorpe
2022-04-29 12:50 ` Jason Gunthorpe via iommu
2022-05-02 4:10 ` David Gibson
2022-05-02 4:10 ` David Gibson
2022-04-29 6:20 ` David Gibson
2022-04-29 6:20 ` David Gibson
2022-04-29 12:48 ` Jason Gunthorpe
2022-04-29 12:48 ` Jason Gunthorpe via iommu
2022-05-02 7:30 ` David Gibson
2022-05-02 7:30 ` David Gibson
2022-05-05 19:07 ` Jason Gunthorpe
2022-05-05 19:07 ` Jason Gunthorpe via iommu
2022-05-06 5:25 ` David Gibson
2022-05-06 5:25 ` David Gibson
2022-05-06 10:42 ` Tian, Kevin
2022-05-06 10:42 ` Tian, Kevin
2022-05-09 3:36 ` David Gibson
2022-05-09 3:36 ` David Gibson
2022-05-06 12:48 ` Jason Gunthorpe
2022-05-06 12:48 ` Jason Gunthorpe via iommu
2022-05-09 6:01 ` David Gibson
2022-05-09 6:01 ` David Gibson
2022-05-09 14:00 ` Jason Gunthorpe
2022-05-09 14:00 ` Jason Gunthorpe via iommu
2022-05-10 7:12 ` David Gibson
2022-05-10 7:12 ` David Gibson
2022-05-10 19:00 ` Jason Gunthorpe
2022-05-10 19:00 ` Jason Gunthorpe via iommu
2022-05-11 3:15 ` Tian, Kevin
2022-05-11 3:15 ` Tian, Kevin
2022-05-11 16:32 ` Jason Gunthorpe
2022-05-11 16:32 ` Jason Gunthorpe via iommu
2022-05-11 23:23 ` Tian, Kevin
2022-05-11 23:23 ` Tian, Kevin
2022-05-13 4:35 ` David Gibson
2022-05-13 4:35 ` David Gibson
2022-05-11 4:40 ` David Gibson
2022-05-11 4:40 ` David Gibson
2022-05-11 2:46 ` Tian, Kevin
2022-05-11 2:46 ` Tian, Kevin
2022-05-23 6:02 ` Alexey Kardashevskiy
2022-05-23 6:02 ` Alexey Kardashevskiy
2022-05-24 13:25 ` Jason Gunthorpe
2022-05-24 13:25 ` Jason Gunthorpe via iommu
2022-05-25 1:39 ` David Gibson
2022-05-25 1:39 ` David Gibson
2022-05-25 2:09 ` Alexey Kardashevskiy
2022-05-25 2:09 ` Alexey Kardashevskiy
2022-03-29 9:17 ` Yi Liu
2022-03-29 9:17 ` Yi Liu
2022-03-18 17:27 ` [PATCH RFC 12/12] iommufd: Add a selftest Jason Gunthorpe
2022-03-18 17:27 ` Jason Gunthorpe via iommu
2022-04-12 20:13 ` [PATCH RFC 00/12] IOMMUFD Generic interface Eric Auger
2022-04-12 20:13 ` Eric Auger
2022-04-12 20:22 ` Jason Gunthorpe via iommu
2022-04-12 20:22 ` Jason Gunthorpe
2022-04-12 20:50 ` Eric Auger
2022-04-12 20:50 ` Eric Auger
2022-04-14 10:56 ` Yi Liu
2022-04-14 10:56 ` Yi Liu
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