Re: [PATCH 0/3] Unify IBRS virtualization

[Yosry Ahmed]

On Wed, Mar 26, 2025 at 12:48:53PM -0700, Sean Christopherson wrote:
> On Thu, Mar 13, 2025, Yosry Ahmed wrote:
> > On Fri, Feb 21, 2025 at 04:33:49PM +0000, Yosry Ahmed wrote:
> > > To properly virtualize IBRS on Intel, an IBPB is executed on emulated
> > > VM-exits to provide separate predictor modes for L1 and L2.
> > > 
> > > Similar handling is theoretically needed for AMD, unless IbrsSameMode is
> > > enumerated by the CPU (which should be the case for most/all CPUs
> > > anyway). For correctness and clarity, this series generalizes the
> > > handling to apply for both Intel and AMD as needed.
> > > 
> > > I am not sure if this series would land through the kvm-x86 tree or the
> > > tip/x86 tree.
> > 
> > Sean, any thoughts about this (or general feedback about this series)?
> 
> No feedback, I just you and Jim to get mitigation stuff right far more than I
> trust myself :-)
> 
> I'm planning on grabbing this for 6.16.

Awesome, thanks!