diff options
| author | Oleksandr Tyshchenko <oleksandr_tyshchenko@epam.com> | 2022-06-02 22:23:53 +0300 |
|---|---|---|
| committer | Juergen Gross <jgross@suse.com> | 2022-06-06 16:07:30 +0200 |
| commit | fea981610c25173e6e5d63ccd4fce49739663ab0 (patch) | |
| tree | 9a87d7ab61808cf1b5d71243c976faa893502450 | |
| parent | 625ab90ecdf7770bda7ae21c4d5c938aa9b43bb4 (diff) | |
arm/xen: Assign xen-grant DMA ops for xen-grant DMA devices
By assigning xen-grant DMA ops we will restrict memory access for
passed device using Xen grant mappings. This is needed for using any
virtualized device (e.g. virtio) in Xen guests in a safe manner.
Please note, for the virtio devices the XEN_VIRTIO config should
be enabled (it forces ARCH_HAS_RESTRICTED_VIRTIO_MEMORY_ACCESS).
Signed-off-by: Oleksandr Tyshchenko <oleksandr_tyshchenko@epam.com>
Reviewed-by: Stefano Stabellini <sstabellini@kernel.org>
Link: https://lore.kernel.org/r/1654197833-25362-9-git-send-email-olekstysh@gmail.com
Signed-off-by: Juergen Gross <jgross@suse.com>
| -rw-r--r-- | include/xen/arm/xen-ops.h | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/include/xen/arm/xen-ops.h b/include/xen/arm/xen-ops.h index 288deb1c3ac9..b0766a660338 100644 --- a/include/xen/arm/xen-ops.h +++ b/include/xen/arm/xen-ops.h @@ -3,11 +3,14 @@ #define _ASM_ARM_XEN_OPS_H #include <xen/swiotlb-xen.h> +#include <xen/xen-ops.h> static inline void xen_setup_dma_ops(struct device *dev) { #ifdef CONFIG_XEN - if (xen_swiotlb_detect()) + if (xen_is_grant_dma_device(dev)) + xen_grant_setup_dma_ops(dev); + else if (xen_swiotlb_detect()) dev->dma_ops = &xen_swiotlb_dma_ops; #endif } |