Il 25/08/2013 04:16, Liu Ping Fan ha scritto: > According to hpet spec, hpet irq is high active. But according to > ICH spec, there is inversion before the input of ioapic. So the OS > will expect low active on this IRQ line.(And this is observed on > bare metal). > > We fold the emulation of this inversion inside the hpet logic. > > Signed-off-by: Liu Ping Fan <pingf...@linux.vnet.ibm.com> > --- > kernel has a bug with ioapic, refer to > https://lkml.org/lkml/2013/8/23/98 > With all these patch, linux-2.6/Documentation/timers/hpet_example.c can work > on qemu
Can you explain "in qemu q35 machine ioapic's ioredtbl[x] can never be set as low-active, even if the hpet driver registered it"? Paolo
