On 03/03/2021 14.09, David Hildenbrand wrote:
legacy_s390_alloc() was required for dealing with the absence of the ESOP feature -- on old HW (< gen 10) and old z/VM versions (< 6.3). As z/VM v6.2 (and even v6.3) is no longer supported since 2017 [1] and we don't expect to have real users on such old hardware, let's drop legacy_s390_alloc(). Still check+report an error just in case someone still runs on such old z/VM environments, or someone runs under weird nested KVM setups (where we can manually disable ESOP via the CPU model). No need to check for KVM_CAP_GMAP - that should always be around on kernels that also have KVM_CAP_DEVICE_CTRL (>= v3.15).
Reviewed-by: Thomas Huth <thuth@xxxxxxxxxx>
