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| author | Oleksandr Tyshchenko <oleksandr_tyshchenko@epam.com> | 2022-06-02 21:23:46 +0200 |
|---|---|---|
| committer | Juergen Gross <jgross@suse.com> | 2022-06-06 08:54:33 +0200 |
| commit | 9bf22421dc8a69cade3c994771637e9693ff0216 (patch) | |
| tree | 7a2f56b1d0e68ffaf3dc7715eef2c23dfe6c8942 /include | |
| parent | virtio: replace arch_has_restricted_virtio_memory_access() (diff) | |
| download | linux-9bf22421dc8a69cade3c994771637e9693ff0216.tar.xz linux-9bf22421dc8a69cade3c994771637e9693ff0216.zip | |
arm/xen: Introduce xen_setup_dma_ops()
This patch introduces new helper and places it in new header.
The helper's purpose is to assign any Xen specific DMA ops in
a single place. For now, we deal with xen-swiotlb DMA ops only.
The one of the subsequent commits in current series will add
xen-grant DMA ops case.
Also re-use the xen_swiotlb_detect() check on Arm32.
Signed-off-by: Oleksandr Tyshchenko <oleksandr_tyshchenko@epam.com>
Reviewed-by: Stefano Stabellini <sstabellini@kernel.org>
[For arm64]
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Link: https://lore.kernel.org/r/1654197833-25362-2-git-send-email-olekstysh@gmail.com
Signed-off-by: Juergen Gross <jgross@suse.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/xen/arm/xen-ops.h | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/include/xen/arm/xen-ops.h b/include/xen/arm/xen-ops.h new file mode 100644 index 000000000000..288deb1c3ac9 --- /dev/null +++ b/include/xen/arm/xen-ops.h @@ -0,0 +1,15 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _ASM_ARM_XEN_OPS_H +#define _ASM_ARM_XEN_OPS_H + +#include <xen/swiotlb-xen.h> + +static inline void xen_setup_dma_ops(struct device *dev) +{ +#ifdef CONFIG_XEN + if (xen_swiotlb_detect()) + dev->dma_ops = &xen_swiotlb_dma_ops; +#endif +} + +#endif /* _ASM_ARM_XEN_OPS_H */ |