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vfio/platform: Use GFP_KERNEL_ACCOUNT for userspace persistent allocations

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Use GFP_KERNEL_ACCOUNT for userspace persistent allocations.

The GFP_KERNEL_ACCOUNT option lets the memory allocator know that this
is untrusted allocation triggered from userspace and should be a subject
of kmem accounting, and as such it is controlled by the cgroup
mechanism.

Signed-off-by: Yishai Hadas <yishaih@nvidia.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Link: https://lore.kernel.org/r/20230108154427.32609-7-yishaih@nvidia.com
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
This commit is contained in:
Yishai Hadas 2023-01-08 17:44:27 +02:00 committed by Alex Williamson
parent 4a6c971a06
commit 7658aeda33
2 changed files with 5 additions and 5 deletions
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2
drivers/vfio/platform/vfio_platform_common.c
View File

@ -142,7 +142,7 @@ static int vfio_platform_regions_init(struct vfio_platform_device *vdev)
cnt++;
vdev->regions = kcalloc(cnt, sizeof(struct vfio_platform_region),
GFP_KERNEL);
GFP_KERNEL_ACCOUNT);
if (!vdev->regions)
return -ENOMEM;

8
drivers/vfio/platform/vfio_platform_irq.c
View File

@ -186,9 +186,8 @@ static int vfio_set_trigger(struct vfio_platform_device *vdev, int index,
if (fd < 0) /* Disable only */
return 0;
irq->name = kasprintf(GFP_KERNEL, "vfio-irq[%d](%s)",
irq->hwirq, vdev->name);
irq->name = kasprintf(GFP_KERNEL_ACCOUNT, "vfio-irq[%d](%s)",
irq->hwirq, vdev->name);
if (!irq->name)
return -ENOMEM;
@ -286,7 +285,8 @@ int vfio_platform_irq_init(struct vfio_platform_device *vdev)
while (vdev->get_irq(vdev, cnt) >= 0)
cnt++;
vdev->irqs = kcalloc(cnt, sizeof(struct vfio_platform_irq), GFP_KERNEL);
vdev->irqs = kcalloc(cnt, sizeof(struct vfio_platform_irq),
GFP_KERNEL_ACCOUNT);
if (!vdev->irqs)
return -ENOMEM;