From: Yi Liu <yi.l.liu@intel.com>
To: alex.williamson@redhat.com, jgg@nvidia.com, kevin.tian@intel.com
Cc: joro@8bytes.org, robin.murphy@arm.com, cohuck@redhat.com,
eric.auger@redhat.com, nicolinc@nvidia.com, kvm@vger.kernel.org,
mjrosato@linux.ibm.com, chao.p.peng@linux.intel.com,
yi.l.liu@intel.com, yi.y.sun@linux.intel.com, peterx@redhat.com,
jasowang@redhat.com, shameerali.kolothum.thodi@huawei.com,
lulu@redhat.com, suravee.suthikulpanit@amd.com,
intel-gvt-dev@lists.freedesktop.org,
intel-gfx@lists.freedesktop.org, linux-s390@vger.kernel.org,
xudong.hao@intel.com, yan.y.zhao@intel.com,
terrence.xu@intel.com, yanting.jiang@intel.com,
zhenzhong.duan@intel.com, clegoate@redhat.com
Subject: [PATCH v7 3/9] iommufd: Reserve all negative IDs in the iommufd xarray
Date: Fri, 2 Jun 2023 05:15:09 -0700 [thread overview]
Message-ID: <20230602121515.79374-4-yi.l.liu@intel.com> (raw)
In-Reply-To: <20230602121515.79374-1-yi.l.liu@intel.com>
With this reservation, IOMMUFD users can encode the negative IDs for
specific purposes. e.g. VFIO needs two reserved values to tell userspace
the ID returned is not valid but has other meaning.
Tested-by: Terrence Xu <terrence.xu@intel.com>
Signed-off-by: Yi Liu <yi.l.liu@intel.com>
---
drivers/iommu/iommufd/main.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/iommu/iommufd/main.c b/drivers/iommu/iommufd/main.c
index 3fbe636c3d8a..32ce7befc8dd 100644
--- a/drivers/iommu/iommufd/main.c
+++ b/drivers/iommu/iommufd/main.c
@@ -50,7 +50,7 @@ struct iommufd_object *_iommufd_object_alloc(struct iommufd_ctx *ictx,
* before calling iommufd_object_finalize().
*/
rc = xa_alloc(&ictx->objects, &obj->id, XA_ZERO_ENTRY,
- xa_limit_32b, GFP_KERNEL_ACCOUNT);
+ xa_limit_31b, GFP_KERNEL_ACCOUNT);
if (rc)
goto out_free;
return obj;
--
2.34.1
WARNING: multiple messages have this Message-ID (diff)
From: Yi Liu <yi.l.liu@intel.com>
To: alex.williamson@redhat.com, jgg@nvidia.com, kevin.tian@intel.com
Cc: mjrosato@linux.ibm.com, jasowang@redhat.com,
xudong.hao@intel.com, zhenzhong.duan@intel.com,
peterx@redhat.com, terrence.xu@intel.com,
chao.p.peng@linux.intel.com, linux-s390@vger.kernel.org,
yi.l.liu@intel.com, kvm@vger.kernel.org, lulu@redhat.com,
yanting.jiang@intel.com, joro@8bytes.org, nicolinc@nvidia.com,
yan.y.zhao@intel.com, intel-gfx@lists.freedesktop.org,
eric.auger@redhat.com, intel-gvt-dev@lists.freedesktop.org,
yi.y.sun@linux.intel.com, clegoate@redhat.com, cohuck@redhat.com,
shameerali.kolothum.thodi@huawei.com,
suravee.suthikulpanit@amd.com, robin.murphy@arm.com
Subject: [Intel-gfx] [PATCH v7 3/9] iommufd: Reserve all negative IDs in the iommufd xarray
Date: Fri, 2 Jun 2023 05:15:09 -0700 [thread overview]
Message-ID: <20230602121515.79374-4-yi.l.liu@intel.com> (raw)
In-Reply-To: <20230602121515.79374-1-yi.l.liu@intel.com>
With this reservation, IOMMUFD users can encode the negative IDs for
specific purposes. e.g. VFIO needs two reserved values to tell userspace
the ID returned is not valid but has other meaning.
Tested-by: Terrence Xu <terrence.xu@intel.com>
Signed-off-by: Yi Liu <yi.l.liu@intel.com>
---
drivers/iommu/iommufd/main.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/iommu/iommufd/main.c b/drivers/iommu/iommufd/main.c
index 3fbe636c3d8a..32ce7befc8dd 100644
--- a/drivers/iommu/iommufd/main.c
+++ b/drivers/iommu/iommufd/main.c
@@ -50,7 +50,7 @@ struct iommufd_object *_iommufd_object_alloc(struct iommufd_ctx *ictx,
* before calling iommufd_object_finalize().
*/
rc = xa_alloc(&ictx->objects, &obj->id, XA_ZERO_ENTRY,
- xa_limit_32b, GFP_KERNEL_ACCOUNT);
+ xa_limit_31b, GFP_KERNEL_ACCOUNT);
if (rc)
goto out_free;
return obj;
--
2.34.1
next prev parent reply other threads:[~2023-06-02 12:15 UTC|newest]
Thread overview: 77+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-06-02 12:15 [PATCH v7 0/9] Enhance vfio PCI hot reset for vfio cdev device Yi Liu
2023-06-02 12:15 ` [Intel-gfx] " Yi Liu
2023-06-02 12:15 ` [PATCH v7 1/9] vfio/pci: Update comment around group_fd get in vfio_pci_ioctl_pci_hot_reset() Yi Liu
2023-06-02 12:15 ` [Intel-gfx] " Yi Liu
2023-06-02 12:15 ` [PATCH v7 2/9] vfio/pci: Move the existing hot reset logic to be a helper Yi Liu
2023-06-02 12:15 ` [Intel-gfx] " Yi Liu
2023-06-02 12:15 ` Yi Liu [this message]
2023-06-02 12:15 ` [Intel-gfx] [PATCH v7 3/9] iommufd: Reserve all negative IDs in the iommufd xarray Yi Liu
2023-06-13 11:46 ` Jason Gunthorpe
2023-06-13 11:46 ` [Intel-gfx] " Jason Gunthorpe
2023-06-02 12:15 ` [PATCH v7 4/9] iommufd: Add iommufd_ctx_has_group() Yi Liu
2023-06-02 12:15 ` [Intel-gfx] " Yi Liu
2023-06-08 21:40 ` Alex Williamson
2023-06-08 21:40 ` Alex Williamson
2023-06-08 23:44 ` Liu, Yi L
2023-06-08 23:44 ` [Intel-gfx] " Liu, Yi L
2023-06-13 11:46 ` Jason Gunthorpe
2023-06-13 11:46 ` [Intel-gfx] " Jason Gunthorpe
2023-06-02 12:15 ` [PATCH v7 5/9] iommufd: Add helper to retrieve iommufd_ctx and devid Yi Liu
2023-06-02 12:15 ` [Intel-gfx] " Yi Liu
2023-06-13 11:47 ` Jason Gunthorpe
2023-06-13 11:47 ` [Intel-gfx] " Jason Gunthorpe
2023-06-02 12:15 ` [PATCH v7 6/9] vfio: Mark cdev usage in vfio_device Yi Liu
2023-06-02 12:15 ` [Intel-gfx] " Yi Liu
2023-06-13 17:56 ` Jason Gunthorpe
2023-06-13 17:56 ` [Intel-gfx] " Jason Gunthorpe
2023-06-14 5:56 ` Liu, Yi L
2023-06-14 5:56 ` [Intel-gfx] " Liu, Yi L
2023-06-14 12:11 ` Jason Gunthorpe
2023-06-14 12:11 ` [Intel-gfx] " Jason Gunthorpe
2023-06-02 12:15 ` [PATCH v7 7/9] vfio: Add helper to search vfio_device in a dev_set Yi Liu
2023-06-02 12:15 ` [Intel-gfx] " Yi Liu
2023-06-13 11:47 ` Jason Gunthorpe
2023-06-13 11:47 ` Jason Gunthorpe
2023-06-02 12:15 ` [PATCH v7 8/9] vfio/pci: Extend VFIO_DEVICE_GET_PCI_HOT_RESET_INFO for vfio device cdev Yi Liu
2023-06-02 12:15 ` [Intel-gfx] " Yi Liu
2023-06-08 22:26 ` Alex Williamson
2023-06-08 22:26 ` Alex Williamson
2023-06-09 0:04 ` Liu, Yi L
2023-06-09 0:04 ` [Intel-gfx] " Liu, Yi L
2023-06-13 11:46 ` Jason Gunthorpe
2023-06-13 11:46 ` [Intel-gfx] " Jason Gunthorpe
2023-06-13 12:50 ` Liu, Yi L
2023-06-13 12:50 ` [Intel-gfx] " Liu, Yi L
2023-06-13 14:32 ` Alex Williamson
2023-06-13 14:32 ` Alex Williamson
2023-06-13 17:40 ` Jason Gunthorpe
2023-06-13 17:40 ` [Intel-gfx] " Jason Gunthorpe
2023-06-13 18:23 ` Jason Gunthorpe
2023-06-13 18:23 ` [Intel-gfx] " Jason Gunthorpe
2023-06-14 10:35 ` Liu, Yi L
2023-06-14 10:35 ` [Intel-gfx] " Liu, Yi L
2023-06-14 12:17 ` Jason Gunthorpe
2023-06-14 12:17 ` [Intel-gfx] " Jason Gunthorpe
2023-06-14 13:05 ` Liu, Yi L
2023-06-14 13:05 ` [Intel-gfx] " Liu, Yi L
2023-06-14 13:37 ` Jason Gunthorpe
2023-06-14 13:37 ` [Intel-gfx] " Jason Gunthorpe
2023-06-15 3:31 ` Liu, Yi L
2023-06-15 3:31 ` Liu, Yi L
2023-06-02 12:15 ` [PATCH v7 9/9] vfio/pci: Allow passing zero-length fd array in VFIO_DEVICE_PCI_HOT_RESET Yi Liu
2023-06-02 12:15 ` [Intel-gfx] " Yi Liu
2023-06-08 22:30 ` Alex Williamson
2023-06-08 22:30 ` Alex Williamson
2023-06-09 0:13 ` Liu, Yi L
2023-06-09 0:13 ` [Intel-gfx] " Liu, Yi L
2023-06-09 14:38 ` Jason Gunthorpe
2023-06-09 14:38 ` [Intel-gfx] " Jason Gunthorpe
2023-06-13 18:09 ` Jason Gunthorpe
2023-06-13 18:09 ` [Intel-gfx] " Jason Gunthorpe
2023-06-02 15:14 ` [Intel-gfx] ✗ Fi.CI.CHECKPATCH: warning for Enhance vfio PCI hot reset for vfio cdev device (rev5) Patchwork
2023-06-02 15:29 ` [Intel-gfx] ✓ Fi.CI.BAT: success " Patchwork
2023-06-04 20:05 ` [Intel-gfx] ✓ Fi.CI.IGT: " Patchwork
2023-06-08 6:59 ` [PATCH v7 0/9] Enhance vfio PCI hot reset for vfio cdev device Jiang, Yanting
2023-06-08 6:59 ` [Intel-gfx] " Jiang, Yanting
2023-06-13 20:47 ` [Intel-gfx] ✗ Fi.CI.BUILD: failure for Enhance vfio PCI hot reset for vfio cdev device (rev6) Patchwork
2023-06-14 15:47 ` [Intel-gfx] ✗ Fi.CI.BUILD: failure for Enhance vfio PCI hot reset for vfio cdev device (rev7) Patchwork
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