On 19/10/18 12:35, Catalin Marinas wrote: > On Tue, Oct 16, 2018 at 05:14:39PM +0100, Kristina Martsenko wrote: >> On 05/10/2018 10:04, Ramana Radhakrishnan wrote: >>> On 05/10/2018 09:47, Kristina Martsenko wrote: [...] >> The other option is to turn off trapping entirely. However then on a >> big.LITTLE system with mismatched pointer authentication support >> instructions will work intermittently on some CPUs but not others. > > That's another case but let's assume we never see such configurations ;). I'd like to put it on the record that I'm not willing to support such a configuration. So my ask is that if we detect a system where only some of the CPUs have pointer authentication support, we either: 1) prevent some of the CPUs from booting (that's harsh) 2) disable KVM (that's easy) I'm perfectly happy with (2). Thanks, M. -- Jazz is not dead. It just smells funny...
