Re: [PATCH 5/6] kvm/i386: Add support for user space MSR filtering

[Siddharth Chandrasekaran]

On Tue, Jun 08, 2021 at 12:53:17PM +0200, Siddharth Chandrasekaran wrote:
> On Tue, Jun 08, 2021 at 10:48:53AM +0200, Alexander Graf wrote:
> > On 24.05.21 22:01, Siddharth Chandrasekaran wrote:
> > > Check and enable user space MSR filtering capability and handle new exit
> > > reason KVM_EXIT_X86_WRMSR. This will be used in a follow up patch to
> > > implement hyper-v overlay pages.
> > > 
> > > Signed-off-by: Siddharth Chandrasekaran <sidcha@amazon.de>
> > 
> > This patch will break bisection, because we're no longer handling the writes
> > in kernel space after this, but we also don't have user space handling
> > available yet, right? It might be better to move all logic in this patch
> > that sets up the filter for Hyper-V MSRs into the next one.
> 
> Yes, that's correct. I'll just bounce back all reads/writes to KVM. That
> should maintain the existing behaviour.

Okay, bouncing back to KVM was a bad idea :). Moved filters to next
patch as suggested.

~ Sid.



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