Re: [RFC PATCH v1 2/2] KVM: arm64: Allow the RAS feature bit in ID_AA64PFR0_EL1 writable from userspace

On Wed, Sep 25, 2024 at 11:22:40PM -0400, Shaoqin Huang wrote:

Currently FEAT_RAS is not writable, this makes migration fail between systems where this feature differ. Allow the FEAT_RAS writable in ID_AA64PFR0_EL1 to let the migration possible when the RAS is differ between two machines.

Also update the kselftest to test the RAS field.

Please do kernel + selftests changes in separate patches.