[PATCH 04/44] KVM: Teardown VFIO ops earlier in kvm_exit()

[Eric Farman]

On Wed, 2022-11-02 at 23:18 +0000, Sean Christopherson wrote:
> Move the call to kvm_vfio_ops_exit() further up kvm_exit() to try and
> bring some amount of symmetry to the setup order in kvm_init(), and
> more
> importantly so that the arch hooks are invoked dead last by
> kvm_exit().
> This will allow arch code to move away from the arch hooks without
> any
> change in ordering between arch code and common code in kvm_exit().
> 
> That kvm_vfio_ops_exit() is called last appears to be 100%
> arbitrary.  It
> was bolted on after the fact by commit 571ee1b68598 ("kvm: vfio: fix
> unregister kvm_device_ops of vfio").  The nullified
> kvm_device_ops_table
> is also local to kvm_main.c and is used only when there are active
> VMs,
> so unless arch code is doing something truly bizarre, nullifying the
> table earlier in kvm_exit() is little more than a nop.
> 
> Signed-off-by: Sean Christopherson <seanjc at google.com>
> ---
>  virt/kvm/kvm_main.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)

Reviewed-by: Eric Farman <farman at linux.ibm.com>