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authorStefano Stabellini <stefano.stabellini@xilinx.com>2021-05-12 23:18:21 +0300
committerJuergen Gross <jgross@suse.com>2021-05-14 16:52:05 +0300
commitcb6f6b3384d7825d2a43f2256c5200e3b3956fc8 (patch)
treec5109d5a463e339514a84db389cb8a6e519d03ac /include/xen
parentdbc03e81586fc33e4945263fd6e09e22eb4b980f (diff)
downloadlinux-cb6f6b3384d7825d2a43f2256c5200e3b3956fc8.tar.xz
xen/arm: move xen_swiotlb_detect to arm/swiotlb-xen.h
Move xen_swiotlb_detect to a static inline function to make it available to !CONFIG_XEN builds. CC: boris.ostrovsky@oracle.com CC: jgross@suse.com Signed-off-by: Stefano Stabellini <stefano.stabellini@xilinx.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Juergen Gross <jgross@suse.com> Link: https://lore.kernel.org/r/20210512201823.1963-1-sstabellini@kernel.org Signed-off-by: Juergen Gross <jgross@suse.com>
Diffstat (limited to 'include/xen')
-rw-r--r--include/xen/arm/swiotlb-xen.h15
1 files changed, 14 insertions, 1 deletions
diff --git a/include/xen/arm/swiotlb-xen.h b/include/xen/arm/swiotlb-xen.h
index 2994fe6031a0..33336ab58afc 100644
--- a/include/xen/arm/swiotlb-xen.h
+++ b/include/xen/arm/swiotlb-xen.h
@@ -2,6 +2,19 @@
#ifndef _ASM_ARM_SWIOTLB_XEN_H
#define _ASM_ARM_SWIOTLB_XEN_H
-extern int xen_swiotlb_detect(void);
+#include <xen/features.h>
+#include <xen/xen.h>
+
+static inline int xen_swiotlb_detect(void)
+{
+ if (!xen_domain())
+ return 0;
+ if (xen_feature(XENFEAT_direct_mapped))
+ return 1;
+ /* legacy case */
+ if (!xen_feature(XENFEAT_not_direct_mapped) && xen_initial_domain())
+ return 1;
+ return 0;
+}
#endif /* _ASM_ARM_SWIOTLB_XEN_H */