diff options
| -rw-r--r-- | drivers/vfio/vfio_iommu_type1.c | 18 |
1 files changed, 11 insertions, 7 deletions
diff --git a/drivers/vfio/vfio_iommu_type1.c b/drivers/vfio/vfio_iommu_type1.c index e6e7f155bdd9..35c90089478e 100644 --- a/drivers/vfio/vfio_iommu_type1.c +++ b/drivers/vfio/vfio_iommu_type1.c @@ -265,6 +265,7 @@ static long vfio_pin_pages(unsigned long vaddr, long npage, unsigned long limit = rlimit(RLIMIT_MEMLOCK) >> PAGE_SHIFT; bool lock_cap = capable(CAP_IPC_LOCK); long ret, i; + bool rsvd; if (!current->mm) return -ENODEV; @@ -273,10 +274,9 @@ static long vfio_pin_pages(unsigned long vaddr, long npage, if (ret) return ret; - if (is_invalid_reserved_pfn(*pfn_base)) - return 1; + rsvd = is_invalid_reserved_pfn(*pfn_base); - if (!lock_cap && current->mm->locked_vm + 1 > limit) { + if (!rsvd && !lock_cap && current->mm->locked_vm + 1 > limit) { put_pfn(*pfn_base, prot); pr_warn("%s: RLIMIT_MEMLOCK (%ld) exceeded\n", __func__, limit << PAGE_SHIFT); @@ -284,7 +284,8 @@ static long vfio_pin_pages(unsigned long vaddr, long npage, } if (unlikely(disable_hugepages)) { - vfio_lock_acct(1); + if (!rsvd) + vfio_lock_acct(1); return 1; } @@ -296,12 +297,14 @@ static long vfio_pin_pages(unsigned long vaddr, long npage, if (ret) break; - if (pfn != *pfn_base + i || is_invalid_reserved_pfn(pfn)) { + if (pfn != *pfn_base + i || + rsvd != is_invalid_reserved_pfn(pfn)) { put_pfn(pfn, prot); break; } - if (!lock_cap && current->mm->locked_vm + i + 1 > limit) { + if (!rsvd && !lock_cap && + current->mm->locked_vm + i + 1 > limit) { put_pfn(pfn, prot); pr_warn("%s: RLIMIT_MEMLOCK (%ld) exceeded\n", __func__, limit << PAGE_SHIFT); @@ -309,7 +312,8 @@ static long vfio_pin_pages(unsigned long vaddr, long npage, } } - vfio_lock_acct(i); + if (!rsvd) + vfio_lock_acct(i); return i; } |