@@ -101,6 +101,7 @@ struct vfio_dma {
struct rb_root pfn_list; /* Ex-user pinned pfn list */
unsigned long *bitmap;
struct mm_struct *mm;
+ size_t locked_vm;
};
struct vfio_batch {
@@ -413,6 +414,19 @@ static int vfio_iova_put_vfio_pfn(struct vfio_dma *dma, struct vfio_pfn *vpfn)
return ret;
}
+static int mm_lock_acct(struct task_struct *task, struct mm_struct *mm,
+ bool lock_cap, long npage)
+{
+ int ret = mmap_write_lock_killable(mm);
+
+ if (ret)
+ return ret;
+
+ ret = __account_locked_vm(mm, abs(npage), npage > 0, task, lock_cap);
+ mmap_write_unlock(mm);
+ return ret;
+}
+
static int vfio_lock_acct(struct vfio_dma *dma, long npage, bool async)
{
struct mm_struct *mm;
@@ -425,12 +439,9 @@ static int vfio_lock_acct(struct vfio_dma *dma, long npage, bool async)
if (async && !mmget_not_zero(mm))
return -ESRCH; /* process exited */
- ret = mmap_write_lock_killable(mm);
- if (!ret) {
- ret = __account_locked_vm(mm, abs(npage), npage > 0, dma->task,
- dma->lock_cap);
- mmap_write_unlock(mm);
- }
+ ret = mm_lock_acct(dma->task, mm, dma->lock_cap, npage);
+ if (!ret)
+ dma->locked_vm += npage;
if (async)
mmput(mm);
Track locked_vm per dma struct, and create a new subroutine, both for use in a subsequent patch. No functional change. Fixes: c3cbab24db38 ("vfio/type1: implement interfaces to update vaddr") Cc: stable@vger.kernel.org Signed-off-by: Steve Sistare <steven.sistare@oracle.com> Reviewed-by: Kevin Tian <kevin.tian@intel.com> --- drivers/vfio/vfio_iommu_type1.c | 23 +++++++++++++++++------ 1 file changed, 17 insertions(+), 6 deletions(-)