Re: [PATCH v4 03/19] kvm: arm64: Hide system instruction access to Trace registers

Will, Catalin, On 25/02/2021 19:35, Suzuki K Poulose wrote: Currently we advertise the ID_AA6DFR0_EL1.TRACEVER for the guest, when the trace register accesses are trapped (CPTR_EL2.TTA == 1). So, the guest will get an undefined instruction, if trusts the ID registers and access one of the trace

[PATCH v4 03/19] kvm: arm64: Hide system instruction access to Trace registers

Currently we advertise the ID_AA6DFR0_EL1.TRACEVER for the guest, when the trace register accesses are trapped (CPTR_EL2.TTA == 1). So, the guest will get an undefined instruction, if trusts the ID registers and access one of the trace registers. Lets be nice to the guest and hide the feature to