[PATCH 16/16] vfio: account iommu allocations

Pasha Tatashin
2023-11-28T20:50:17Z

iommu allocations should be accounted in order to allow admins to
monitor and limit the amount of iommu memory.

Signed-off-by: Pasha Tatashin <pasha.tatashin@soleen.com>
---
drivers/vfio/vfio_iommu_type1.c | 8 +++++---
1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/drivers/vfio/vfio_iommu_type1.c b/drivers/vfio/vfio_iommu_type1.c
index eacd6ec04de5..b2854d7939ce 100644
--- a/drivers/vfio/vfio_iommu_type1.c
+++ b/drivers/vfio/vfio_iommu_type1.c
@@ -1436,7 +1436,7 @@ static int vfio_iommu_map(struct vfio_iommu *iommu, dma_addr_t iova,
list_for_each_entry(d, &iommu->domain_list, next) {
ret = iommu_map(d->domain, iova, (phys_addr_t)pfn << PAGE_SHIFT,
npage << PAGE_SHIFT, prot | IOMMU_CACHE,
- GFP_KERNEL);
+ GFP_KERNEL_ACCOUNT);
if (ret)
goto unwind;

@@ -1750,7 +1750,8 @@ static int vfio_iommu_replay(struct vfio_iommu *iommu,
}

ret = iommu_map(domain->domain, iova, phys, size,
- dma->prot | IOMMU_CACHE, GFP_KERNEL);
+ dma->prot | IOMMU_CACHE,
+ GFP_KERNEL_ACCOUNT);
if (ret) {
if (!dma->iommu_mapped) {
vfio_unpin_pages_remote(dma, iova,
@@ -1845,7 +1846,8 @@ static void vfio_test_domain_fgsp(struct vfio_domain *domain, struct list_head *
continue;

ret = iommu_map(domain->domain, start, page_to_phys(pages), PAGE_SIZE * 2,
- IOMMU_READ | IOMMU_WRITE | IOMMU_CACHE, GFP_KERNEL);
+ IOMMU_READ | IOMMU_WRITE | IOMMU_CACHE,
+ GFP_KERNEL_ACCOUNT);
if (!ret) {
size_t unmapped = iommu_unmap(domain->domain, start, PAGE_SIZE);

--
2.43.0.rc2.451.g8631bc7472-goog