Re: [PATCH v3 1/2] KVM: arm64: Reject VM creation when the default IPA size is unsupported

2021-03-11 Thread Auger Eric
Hi Marc, On 3/11/21 11:00 AM, Marc Zyngier wrote: > KVM/arm64 has forever used a 40bit default IPA space, partially > due to its 32bit heritage (where the only choice is 40bit). > > However, there are implementations in the wild that have a *cough* > much smaller *cough* IPA space, which leads

Re: [PATCH v3 1/2] KVM: arm64: Reject VM creation when the default IPA size is unsupported

2021-03-11 Thread Andrew Jones
On Thu, Mar 11, 2021 at 10:00:15AM +, Marc Zyngier wrote: > KVM/arm64 has forever used a 40bit default IPA space, partially > due to its 32bit heritage (where the only choice is 40bit). > > However, there are implementations in the wild that have a *cough* > much smaller *cough* IPA space,

[PATCH v3 1/2] KVM: arm64: Reject VM creation when the default IPA size is unsupported

2021-03-11 Thread Marc Zyngier
KVM/arm64 has forever used a 40bit default IPA space, partially due to its 32bit heritage (where the only choice is 40bit). However, there are implementations in the wild that have a *cough* much smaller *cough* IPA space, which leads to a misprogramming of VTCR_EL2, and a guest that is stuck on