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Re: [Xen-devel] [PATCH 1/7] xen: import new ring macros in ring.h



Hi Stefano,

On 03/06/2017 08:01 PM, Stefano Stabellini wrote:
Sync the ring.h file with upstream Xen, to introduce the new ring macros.
They will be used by the Xen transport for 9pfs.

Signed-off-by: Stefano Stabellini <stefano@xxxxxxxxxxx>
CC: konrad.wilk@xxxxxxxxxx
CC: boris.ostrovsky@xxxxxxxxxx
CC: jgross@xxxxxxxx

---
NB: The new macros have not been committed to Xen yet. Do not apply this
patch until they do.
---
---
 include/xen/interface/io/ring.h | 131 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 131 insertions(+)

diff --git a/include/xen/interface/io/ring.h b/include/xen/interface/io/ring.h
index 21f4fbd..e16aa92 100644
--- a/include/xen/interface/io/ring.h
+++ b/include/xen/interface/io/ring.h

[...]

+#define XEN_FLEX_RING_SIZE(order)                                             \
+    (1UL << (order + PAGE_SHIFT - 1))

This will need to be XEN_PAGE_SHIFT in order to works with 64K kernel.

Cheers,

--
Julien Grall

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