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vfio/type1: introduce a new member has_rsvd for struct vfio_dma

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Introduce a new member has_rsvd for struct vfio_dma. This member is
used to indicate whether there are any reserved or invalid pfns in
the region represented by this vfio_dma. If it is true, it indicates
that there is at least one pfn in this region that is either reserved
or invalid.

Signed-off-by: Li Zhe <lizhe.67@bytedance.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Link: https://lore.kernel.org/r/20250814064714.56485-5-lizhe.67@bytedance.com
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
This commit is contained in:
Li Zhe 2025-08-14 14:47:13 +08:00 committed by Alex Williamson
parent d10872050f
commit 089722e893
1 changed files with 2 additions and 0 deletions
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2
drivers/vfio/vfio_iommu_type1.c
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@ -93,6 +93,7 @@ struct vfio_dma {
bool iommu_mapped;
bool lock_cap; /* capable(CAP_IPC_LOCK) */
bool vaddr_invalid;
bool has_rsvd; /* has 1 or more rsvd pfns */
struct task_struct *task;
struct rb_root pfn_list; /* Ex-user pinned pfn list */
unsigned long *bitmap;
@ -782,6 +783,7 @@ static long vfio_pin_pages_remote(struct vfio_dma *dma, unsigned long vaddr,
}
out:
dma->has_rsvd |= rsvd;
ret = vfio_lock_acct(dma, lock_acct, false);
unpin_out: