On Thu, 26 Jul 2012, David Vrabel wrote:

On 26/07/12 16:33, Stefano Stabellini wrote:

quoted

+ * The hvc ISS is required to be 0xEA1, that is the Xen specific ARM
+ * hypercall tag.

Is this number, 0xea1, assigned to Xen by some external body?

I am not aware of any "external body" that could assign us such a number
but it is specified in the Xen hypercall calling convention, documented
here:

http://xenbits.xensource.com/hg/xen-unstable.hg/file/663eb766cdde/xen/include/public/arch-arm.h