diff options
| author | Stefano Stabellini <stefano.stabellini@xilinx.com> | 2021-03-19 23:01:40 +0300 |
|---|---|---|
| committer | Juergen Gross <jgross@suse.com> | 2021-04-23 12:33:50 +0300 |
| commit | f5079a9a2a31607a2343e544e9182ce35b030578 (patch) | |
| tree | 845187f971beecc8c97874a6789a4661e3951056 /include/xen/arm | |
| parent | a929e124060c448b367f56b28a0c118876147b1f (diff) | |
| download | linux-f5079a9a2a31607a2343e544e9182ce35b030578.tar.xz | |
xen/arm: introduce XENFEAT_direct_mapped and XENFEAT_not_direct_mapped
Newer Xen versions expose two Xen feature flags to tell us if the domain
is directly mapped or not. Only when a domain is directly mapped it
makes sense to enable swiotlb-xen on ARM.
Introduce a function on ARM to check the new Xen feature flags and also
to deal with the legacy case. Call the function xen_swiotlb_detect.
Signed-off-by: Stefano Stabellini <stefano.stabellini@xilinx.com>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Link: https://lore.kernel.org/r/20210319200140.12512-1-sstabellini@kernel.org
Signed-off-by: Juergen Gross <jgross@suse.com>
Diffstat (limited to 'include/xen/arm')
| -rw-r--r-- | include/xen/arm/swiotlb-xen.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/include/xen/arm/swiotlb-xen.h b/include/xen/arm/swiotlb-xen.h new file mode 100644 index 000000000000..2994fe6031a0 --- /dev/null +++ b/include/xen/arm/swiotlb-xen.h @@ -0,0 +1,7 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _ASM_ARM_SWIOTLB_XEN_H +#define _ASM_ARM_SWIOTLB_XEN_H + +extern int xen_swiotlb_detect(void); + +#endif /* _ASM_ARM_SWIOTLB_XEN_H */ |