Re: [PATCH 19/19] KVM: introduce a KVM_DELETE_DEVICE ioctl

2019-01-25 Thread Benjamin Herrenschmidt
On Wed, 2019-01-23 at 19:39 +0100, Cédric Le Goater wrote: > > The reason I ask is that we will have to be much more careful about > > memory allocation lifetimes with this patch. > > yes. bad refcounting will lead the host kernel to a crash. One way to alleviate that is to make sure this is on

Re: [PATCH 19/19] KVM: introduce a KVM_DELETE_DEVICE ioctl

2019-01-23 Thread Cédric Le Goater
On 1/22/19 6:42 AM, Paul Mackerras wrote: > On Mon, Jan 07, 2019 at 08:10:06PM +0100, Cédric Le Goater wrote: >> This will be used to destroy the KVM XICS or XIVE device when the >> sPAPR machine is reseted. When the VM boots, the CAS negotiation >> process will determine which interrupt mode to us

Re: [PATCH 19/19] KVM: introduce a KVM_DELETE_DEVICE ioctl

2019-01-21 Thread Paul Mackerras
On Mon, Jan 07, 2019 at 08:10:06PM +0100, Cédric Le Goater wrote: > This will be used to destroy the KVM XICS or XIVE device when the > sPAPR machine is reseted. When the VM boots, the CAS negotiation > process will determine which interrupt mode to use and the appropriate > KVM device will then be