Re: [PATCH v2 2/6] arm64: KVM: Handle Set/Way CMOs as NOPs if FWB is present

2018-06-09 Thread Marc Zyngier
On Sat, 09 Jun 2018 10:26:40 +0100, Christoffer Dall wrote: > > On Wed, May 30, 2018 at 01:47:02PM +0100, Marc Zyngier wrote: > > Set/Way handling is one of the ugliest corners of KVM. We shouldn't > > have to handle that, but better safe than sorry. > > > > Thankfully, FWB fixes this for us by

Re: [PATCH v2 2/6] arm64: KVM: Handle Set/Way CMOs as NOPs if FWB is present

2018-06-09 Thread Christoffer Dall
On Wed, May 30, 2018 at 01:47:02PM +0100, Marc Zyngier wrote: > Set/Way handling is one of the ugliest corners of KVM. We shouldn't > have to handle that, but better safe than sorry. > > Thankfully, FWB fixes this for us by not requiering any maintenance > whatsoever, which means we don't have to

Re: [PATCH v2 2/6] arm64: KVM: Handle Set/Way CMOs as NOPs if FWB is present

2018-05-31 Thread Mark Rutland
On Thu, May 31, 2018 at 02:00:11PM +0100, Marc Zyngier wrote: > On 31/05/18 12:51, Mark Rutland wrote: > > On Wed, May 30, 2018 at 01:47:02PM +0100, Marc Zyngier wrote: > >> Set/Way handling is one of the ugliest corners of KVM. We shouldn't > >> have to handle that, but better safe than sorry. >

Re: [PATCH v2 2/6] arm64: KVM: Handle Set/Way CMOs as NOPs if FWB is present

2018-05-31 Thread Marc Zyngier
On 31/05/18 12:51, Mark Rutland wrote: > On Wed, May 30, 2018 at 01:47:02PM +0100, Marc Zyngier wrote: >> Set/Way handling is one of the ugliest corners of KVM. We shouldn't >> have to handle that, but better safe than sorry. >> >> Thankfully, FWB fixes this for us by not requiering any

Re: [PATCH v2 2/6] arm64: KVM: Handle Set/Way CMOs as NOPs if FWB is present

2018-05-31 Thread Mark Rutland
On Wed, May 30, 2018 at 01:47:02PM +0100, Marc Zyngier wrote: > Set/Way handling is one of the ugliest corners of KVM. We shouldn't > have to handle that, but better safe than sorry. > > Thankfully, FWB fixes this for us by not requiering any maintenance > whatsoever, which means we don't have to

[PATCH v2 2/6] arm64: KVM: Handle Set/Way CMOs as NOPs if FWB is present

2018-05-30 Thread Marc Zyngier
Set/Way handling is one of the ugliest corners of KVM. We shouldn't have to handle that, but better safe than sorry. Thankfully, FWB fixes this for us by not requiering any maintenance whatsoever, which means we don't have to emulate S/W CMOs, and don't have to track VM ops either. We still have