Will Deacon a0be1db430 virtio_pci: Limit DMA mask to 44 bits for legacy virtio devices ... Legacy virtio defines the virtqueue base using a 32-bit PFN field, with a read-only register indicating a fixed page size of 4k. This can cause problems for DMA allocators that allocate top down from the DMA mask, which is set to 64 bits. In this case, the addresses are silently truncated to 44-bit, leading to IOMMU faults, failure to read from the queue or data corruption. This patch restricts the coherent DMA mask for legacy PCI virtio devices to 44 bits, which matches the specification. Cc: stable@vger.kernel.org Cc: Andy Lutomirski <luto@kernel.org> Cc: Michael S. Tsirkin <mst@redhat.com> Cc: Benjamin Serebrin <serebrin@google.com> Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>		2016-10-31 00:21:39 +02:00
..
config.c	Remove all #inclusions of asm/system.h	2012-03-28 18:30:03 +01:00
Kconfig	virtio_ring: Support DMA APIs	2016-03-02 17:01:57 +02:00
Makefile	Add virtio-input driver.	2015-03-29 12:13:52 +10:30
virtio_balloon.c	virtio/vhost: new features for 4.8	2016-08-06 09:20:13 -04:00
virtio_input.c	virtio: make find_vqs() checkpatch.pl-friendly	2016-01-12 20:47:06 +02:00
virtio_mmio.c	virtio_mmio: Use the DMA API if enabled	2016-03-02 17:01:58 +02:00
virtio_pci_common.c	PCI changes for the v4.6 merge window:	2016-03-16 14:45:55 -07:00
virtio_pci_common.h	virtio_pci: Use the DMA API if enabled	2016-03-02 17:01:58 +02:00
virtio_pci_legacy.c	virtio_pci: Limit DMA mask to 44 bits for legacy virtio devices	2016-10-31 00:21:39 +02:00
virtio_pci_modern.c	virtio: virtio 1.0 cs04 spec compliance for reset	2016-04-07 15:16:39 +03:00
virtio_ring.c	virtio: mark vring_dma_dev() static	2016-09-09 21:12:35 +03:00
virtio.c	virtio: fix memory leak of virtio ida cache layers	2015-12-07 17:28:01 +02:00