Anthony Liguori wrote: > This patch refactors the current hypercall infrastructure to better support > live > migration and SMP. It eliminates the hypercall page by trapping the UD > exception that would occur if you used the wrong hypercall instruction for the > underlying architecture and replacing it with the right one lazily. >
I guess it would be pretty rude/unlikely for these opcodes to get reused in other implementations... But couldn't you make the page trap instead, rather than relying on an instruction fault? > It also introduces the infrastructure to probe for hypercall available via > CPUID leaves 0x40000002. CPUID leaf 0x40000003 should be filled out by > userspace. > Is this compatible with Xen's (and other's) use of cpuid? That is, 0x40000000 returns a hypervisor-specific signature in e[bcd]x, and eax has the max hypervisor leaf. J - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/