Re: [PATCH] spapr: Clarify error and documentation for broken KVM XICS

2020-08-05 Thread David Gibson
On Wed, Aug 05, 2020 at 05:47:16PM +0200, Greg Kurz wrote: > When starting an L2 KVM guest with `ic-mode=dual,kernel-irqchip=on`, > QEMU fails with: > > KVM is too old to support ic-mode=dual,kernel-irqchip=on > > This error message was introduced to detect older KVM versions that > didn't allow

Re: [PATCH] spapr: Clarify error and documentation for broken KVM XICS

2020-08-05 Thread Cédric Le Goater
On 8/5/20 5:47 PM, Greg Kurz wrote: > When starting an L2 KVM guest with `ic-mode=dual,kernel-irqchip=on`, > QEMU fails with: > > KVM is too old to support ic-mode=dual,kernel-irqchip=on > > This error message was introduced to detect older KVM versions that > didn't allow destruction and re-crea

[PATCH] spapr: Clarify error and documentation for broken KVM XICS

2020-08-05 Thread Greg Kurz
When starting an L2 KVM guest with `ic-mode=dual,kernel-irqchip=on`, QEMU fails with: KVM is too old to support ic-mode=dual,kernel-irqchip=on This error message was introduced to detect older KVM versions that didn't allow destruction and re-creation of the XICS KVM device that we do at reboot.