diff options
| -rw-r--r-- | drivers/virtio/virtio_ring.c | 4 | ||||
| -rw-r--r-- | include/linux/kmsan.h | 9 | ||||
| -rw-r--r-- | kernel/dma/mapping.c | 3 | ||||
| -rw-r--r-- | mm/kmsan/hooks.c | 10 | ||||
| -rw-r--r-- | tools/virtio/linux/kmsan.h | 2 |
5 files changed, 15 insertions, 13 deletions
diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c index f5062061c408..c147145a6593 100644 --- a/drivers/virtio/virtio_ring.c +++ b/drivers/virtio/virtio_ring.c @@ -378,7 +378,7 @@ static int vring_map_one_sg(const struct vring_virtqueue *vq, struct scatterlist * is initialized by the hardware. Explicitly check/unpoison it * depending on the direction. */ - kmsan_handle_dma(sg_page(sg), sg->offset, sg->length, direction); + kmsan_handle_dma(sg_phys(sg), sg->length, direction); *addr = (dma_addr_t)sg_phys(sg); return 0; } @@ -3157,7 +3157,7 @@ dma_addr_t virtqueue_dma_map_single_attrs(struct virtqueue *_vq, void *ptr, struct vring_virtqueue *vq = to_vvq(_vq); if (!vq->use_dma_api) { - kmsan_handle_dma(virt_to_page(ptr), offset_in_page(ptr), size, dir); + kmsan_handle_dma(virt_to_phys(ptr), size, dir); return (dma_addr_t)virt_to_phys(ptr); } diff --git a/include/linux/kmsan.h b/include/linux/kmsan.h index 2b1432cc16d5..f2fd221107bb 100644 --- a/include/linux/kmsan.h +++ b/include/linux/kmsan.h @@ -182,8 +182,7 @@ void kmsan_iounmap_page_range(unsigned long start, unsigned long end); /** * kmsan_handle_dma() - Handle a DMA data transfer. - * @page: first page of the buffer. - * @offset: offset of the buffer within the first page. + * @phys: physical address of the buffer. * @size: buffer size. * @dir: one of possible dma_data_direction values. * @@ -192,7 +191,7 @@ void kmsan_iounmap_page_range(unsigned long start, unsigned long end); * * initializes the buffer, if it is copied from device; * * does both, if this is a DMA_BIDIRECTIONAL transfer. */ -void kmsan_handle_dma(struct page *page, size_t offset, size_t size, +void kmsan_handle_dma(phys_addr_t phys, size_t size, enum dma_data_direction dir); /** @@ -372,8 +371,8 @@ static inline void kmsan_iounmap_page_range(unsigned long start, { } -static inline void kmsan_handle_dma(struct page *page, size_t offset, - size_t size, enum dma_data_direction dir) +static inline void kmsan_handle_dma(phys_addr_t phys, size_t size, + enum dma_data_direction dir) { } diff --git a/kernel/dma/mapping.c b/kernel/dma/mapping.c index 3ac7d15e095f..e47bcf7cc43d 100644 --- a/kernel/dma/mapping.c +++ b/kernel/dma/mapping.c @@ -172,7 +172,8 @@ dma_addr_t dma_map_page_attrs(struct device *dev, struct page *page, addr = iommu_dma_map_phys(dev, phys, size, dir, attrs); else addr = ops->map_page(dev, page, offset, size, dir, attrs); - kmsan_handle_dma(page, offset, size, dir); + + kmsan_handle_dma(phys, size, dir); trace_dma_map_phys(dev, phys, addr, size, dir, attrs); debug_dma_map_phys(dev, phys, size, dir, addr, attrs); diff --git a/mm/kmsan/hooks.c b/mm/kmsan/hooks.c index 97de3d6194f0..fa9475e5ec4e 100644 --- a/mm/kmsan/hooks.c +++ b/mm/kmsan/hooks.c @@ -336,14 +336,16 @@ static void kmsan_handle_dma_page(const void *addr, size_t size, } /* Helper function to handle DMA data transfers. */ -void kmsan_handle_dma(struct page *page, size_t offset, size_t size, +void kmsan_handle_dma(phys_addr_t phys, size_t size, enum dma_data_direction dir) { - u64 page_offset, to_go, addr; + struct page *page = phys_to_page(phys); + u64 page_offset, to_go; + void *addr; - if (PageHighMem(page)) + if (PhysHighMem(phys)) return; - addr = (u64)page_address(page) + offset; + addr = page_to_virt(page); /* * The kernel may occasionally give us adjacent DMA pages not belonging * to the same allocation. Process them separately to avoid triggering diff --git a/tools/virtio/linux/kmsan.h b/tools/virtio/linux/kmsan.h index 272b5aa285d5..6cd2e3efd03d 100644 --- a/tools/virtio/linux/kmsan.h +++ b/tools/virtio/linux/kmsan.h @@ -4,7 +4,7 @@ #include <linux/gfp.h> -inline void kmsan_handle_dma(struct page *page, size_t offset, size_t size, +inline void kmsan_handle_dma(phys_addr_t phys, size_t size, enum dma_data_direction dir) { } |