On Tue, May 20, 2014 at 01:25:11PM +0200, Alexander Graf wrote: > > On 20.05.14 10:30, Gavin Shan wrote: > >If we detects frozen state on PE that has been passed to guest, we > >needn't handle it. Instead, we rely on the guest to detect and recover > >it. The patch avoid EEH event on the frozen passed PE so that the guest > >can have chance to handle that. > > > >Signed-off-by: Gavin Shan <gwshan@xxxxxxxxxxxxxxxxxx> > > How does the guest learn about this failure? We'd need to inject an error > into it, no? > > I think what you want is an irqfd that the in-kernel eeh code notifies when > it sees a failure. When such an fd exists, the kernel skips its own error > handling. Well... we don't have irqfd support for book3s HV upstream yet. The way the current code is, we have to turn on GSI routing, which puts a hard and relatively small limit on the hardware IRQ numbers we can use as it uses a flat array indexed by hardware IRQ number. Which is a problem that I need to solve somehow, but it makes using an irqfd unattractive in the short term. Paul. -- To unsubscribe from this list: send the line "unsubscribe kvm-ppc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
