Re: [PATCH] arm64: KVM: export current vcpu->pause state via pseudo regs

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



Il 09/07/2014 15:55, Alex Bennée ha scritto:
> To cleanly restore an SMP VM we need to ensure that the current pause
> state of each vcpu is correctly recorded. Things could get confused if
> the CPU starts running after migration restore completes when it was
> paused before it state was captured.
> 
> I've done this by exposing a register (currently only 1 bit used) via
> the GET/SET_ONE_REG logic to pass the state between KVM and the VM
> controller (e.g. QEMU).
> 
> Signed-off-by: Alex Bennée <alex.bennee@xxxxxxxxxx>
> ---
>  arch/arm64/include/uapi/asm/kvm.h |  8 +++++
>  arch/arm64/kvm/guest.c            | 61 ++++++++++++++++++++++++++++++++++++++-
>  2 files changed, 68 insertions(+), 1 deletion(-)

Since it's a pseudo register anyway, would it make sense to use the
existing KVM_GET/SET_MP_STATE ioctl interface?

How is this represented within QEMU in TCG mode?  Also, how is KVM/ARM
representing (and passing to QEMU) the halted state of the VCPU?

Paolo
--
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




[Index of Archives]     [KVM ARM]     [KVM ia64]     [KVM ppc]     [Virtualization Tools]     [Spice Development]     [Libvirt]     [Libvirt Users]     [Linux USB Devel]     [Linux Audio Users]     [Yosemite Questions]     [Linux Kernel]     [Linux SCSI]     [XFree86]
  Powered by Linux