On Mon, 20 Sep 2021 13:05:25 +0100, Paolo Bonzini <pbonzini@xxxxxxxxxx> wrote: > > On 17/09/21 09:28, Peter Zijlstra wrote: > >> In theory, I like the idea of burying intel_pt inside x86 (and even in > >> Intel+VMX code for the most part), but the actual implementation is a > >> bit gross. Because of the whole "KVM can be a module" thing, > > > > ARGH!! we should really fix that. I've heard other archs have made much > > better choices here. > > I think that's only ARM, and even then it is only because of > limitations of the hardware which mostly apply only if VHE is not in > use. > > If anything, it's ARM that should support module build in VHE mode > (Linux would still need to know whether it will be running at EL1 or > EL2, but KVM's functionality is as self-contained as on x86 in the VHE > case). I don't see this happening anytime soon. At least not before we declare the arm64 single kernel image policy to be obsolete. M. -- Without deviation from the norm, progress is not possible.
