On 10/17/2011 06:00 PM, Lai Jiangshan wrote: > From: Lai Jiangshan <laijs@xxxxxxxxxxxxxx> > > Currently, NMI interrupt is blindly sent to all the vCPUs when NMI > button event happens. This doesn't properly emulate real hardware on > which NMI button event triggers LINT1. Because of this, NMI is sent to > the processor even when LINT1 is maskied in LVT. For example, this > causes the problem that kdump initiated by NMI sometimes doesn't work > on KVM, because kdump assumes NMI is masked on CPUs other than CPU0. > > With this patch, inject-nmi request is handled as follows. > > - When in-kernel irqchip is disabled, deliver LINT1 instead of NMI > interrupt. > - When in-kernel irqchip is enabled, get the in-kernel LAPIC states > and test the APIC_LVT_MASKED, if LINT1 is unmasked, and then > delivering the NMI directly. (Suggested by Jan Kiszka) > > Changed from old version: > re-implement it by the Jan's suggestion. > fix the race found by Jan. This patch fell through the cracks, sorry. Now applied. Sasha, this patch highlights the issues with KVM_NMI. -- error compiling committee.c: too many arguments to function -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
