Messages in this thread | | | Date | Tue, 26 Apr 2022 01:00:54 +0200 | From | "Maciej S. Szmigiero" <> | Subject | Re: [PATCH v2 11/11] KVM: SVM: Drop support for CPUs without NRIPS (NextRIP Save) support |
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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@redhat.com> > Not-signed-off-by: Sean Christopherson <seanjc@google.com>
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
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