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drm/xe: Do not run GPU page fault handler on a closed VM

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Closing a VM removes page table memory thus we shouldn't touch page
tables when a VM is closed. Do not run the GPU page fault handler once
the VM is closed to avoid touching page tables.

Signed-off-by: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Himal Prasad Ghimiray <himal.prasad.ghimiray@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240911011820.825127-1-matthew.brost@intel.com
This commit is contained in:
Matthew Brost
2024-09-10 18:18:20 -07:00
parent 3b04c2cfd7
commit f96dbf7c32
1 changed files with 6 additions and 0 deletions
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6
drivers/gpu/drm/xe/xe_gt_pagefault.c
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@@ -212,6 +212,12 @@ static int handle_pagefault(struct xe_gt *gt, struct pagefault *pf)
* TODO: Change to read lock? Using write lock for simplicity.
*/
down_write(&vm->lock);
if (xe_vm_is_closed(vm)) {
err = -ENOENT;
goto unlock_vm;
}
vma = lookup_vma(vm, pf->page_addr);
if (!vma) {
err = -EINVAL;