On Fri, 2010-09-24 at 14:02 -0700, Jeremy Fitzhardinge wrote: > On 09/24/2010 01:28 PM, Ian Campbell wrote: > >> I think the Intel MCE people have made NMI work in pvops, but I didn't > >> look closely. > >> > >> But from a pvops perspective, I think the tricky part is sending an NMI > >> rather than receiving. > > It's not just "HYPERVISOR_vcpu_op(VCPUOP_send_nmi, cpu, NULL)"? > > That part's simple, but how to expose it in pvops? A "send NMI" would > be the lowest-level version, but not very generic.
It seems like generally useful functionality to me, wouldn't other sub-archs want it too? e.g. UV appears to use a non-x86 APIC mechanism for sending IPIs, although its not clear if the non-x86-ness of their APIC extends to sending NMIs differently or not. > We could do something like "dump all CPU backtraces" as a high-level operation > without needing any NMIs/IPIs. I think the only hypercalls which return VCPU state are domctl's and hence not much use to us in the kernel. Ian. -- Ian Campbell Current Noise: Judas Priest - Leather Rebel Have you noticed that all you need to grow healthy, vigorous grass is a crack in your sidewalk? -- To UNSUBSCRIBE, email to debian-kernel-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/1285756676.16095.38058.ca...@zakaz.uk.xensource.com
