Re: Undocumented KVM_SET_LAPIC ioctl()

[Avi Kivity <avi@redhat.com>]

On 04/27/2011 10:23 AM, Pekka Enberg wrote:
> Hi!
>
> We're currently having issues while trying to make the KVM in-kernel
> lapic to work. There seems to be a KVM_SET_LAPIC ioctl() for this but
> it's not documented in Documentation/kvm/api.txt. Are there other
> ioctls we should know about? We're using KVM_CREATE_IRQCHIP obviously.

Plenty, yes.

KVM_IRQ_LINE - raise or lower an irq line.
KVM_GET_IRQCHIP/KVM_SET_IRQCHIP - save/restore PIC/IOAPIC states.
KVM_CREATE_PIT2/KVM_GET_PIT2/KVM_SET_PIT2 - PIT support (optional)
KVM_IRQ_LINE_STATUS - like KVM_IRQ_LINE, but provide information about 
whether the interrupt was coalesced or not.  Useful for compensating for 
time drift.
KVM_SET_GSI_ROUTING - manipulate the routes between irq lines and the 
IOAPIC and PIC; also maintain virtual routes for message signalled 
interrupts (MSI)
KVM_IRQFD - raise an edge-triggered interrupt via an eventfd; useful for 
talking to a guest from outside its host process
KVM_GET_LAPIC/KVM_SET_LAPIC - save/restore local APIC register state


I'll post documentation patches.  To get started, KVM_SET_LAPIC is 
simple - it simply accepts a 1K buffer that maps 1:1 to local APIC 
registers as documented in the Intel SDM, volume 3.

-- 
error compiling committee.c: too many arguments to function