Re: [kvm-devel] [PATCH] Refactor hypercall infrastructure

[Jeremy Fitzhardinge]

Nakajima, Jun wrote:
> Today, 3 CPUID leaves starting from 0x4000_0000 are defined in a generic
> fashion (hypervisor detection, version, and hypercall page), and those
> are the ones used by Xen today. We should extend those leaves (e.g.
> starting from 0x4000_0003) for the vmm-independent features as well.
>
> If Xen needs additional Xen-specific features, we need to allocate some
> leaves for those (e.g. 0x4000_1000)

But the signature is "XenVMMXenVMM", which isn't very generic.  If we're
presenting a generic interface, it needs to have a generic signature,
otherwise guests will need to have a list of all hypervisor signatures
supporting their interface.  Since 0x40000000 has already been
established as the base leaf of the hypervisor-specific interfaces, the
generic interface will have to be elsewhere.

    J
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/