On 23.04.2022 04:14, Sean Christopherson wrote:
Drop support for CPUs without NRIPS along with the associated module param. Requiring NRIPS simplifies a handful of paths in KVM, especially paths where KVM has to do silly things when nrips=false but supported in hardware as there is no way to tell the CPU _not_ to use NRIPS. NRIPS was introduced in 2009, i.e. every AMD-based CPU released in the last decade should support NRIPS. Suggested-by: Paolo Bonzini <pbonzini@xxxxxxxxxx> Not-signed-off-by: Sean Christopherson <seanjc@xxxxxxxxxx>
To be honest, I think completely removing KVM support (rather than just nSVM) for these older AMD CPUs is a bit too much. I totally envision complaints coming after this change reaches distro kernels. After all, even older Yonah parts remain supported on the VMX side. Thanks, Maciej
