[Xen-devel] Why using hypercall_page ?

[Wu Bingzheng <wubingzheng@xxxxxxxxx>]

Hello,

I am studing Xen hypercall now. I found that hypercall is invoked via
hypercall_page, which is only filled with (in
no-hypervisor-kernel-mode ):

mov $i, %eax
int $0x82
ret

Why not invoked the hypercall directly by "int $0x82" ? What's the
advantage of using hypercall_page?

Thanks,
Wu


_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel