linux-kernel - Re: [PATCH v2 0/3] Per-VCPU MSR bitmaps patches

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Date:   Mon, 29 Jan 2018 14:57:33 +0000
From:   David Woodhouse <dwmw2@...radead.org>
To:     Paolo Bonzini <pbonzini@...hat.com>, linux-kernel@...r.kernel.org,
        kvm@...r.kernel.org
Cc:     Radim Krčmář <rkrcmar@...hat.com>,
        KarimAllah Ahmed <karahmed@...zon.de>
Subject: Re: [PATCH v2 0/3] Per-VCPU MSR bitmaps patches - topic branch for
 x86/pti

On Mon, 2018-01-29 at 15:28 +0100, Paolo Bonzini wrote:
> On 29/01/2018 13:53, David Woodhouse wrote:
> > 
> > Hm, we are pushing the other bits through tip/x86/pti, which is still
> > based on 4.14 so that everything can be backported easily. I was
> > expecting to be able to pull a clean 4.14-based tree
>
> Anything 4.14-based would have had conflicts all over due to the changes
> that have already gone in for tip/x86/pti.  These three patches do
> cherry-pick cleanly on top of 4.14.
> 
> If you give me the tree and commit id that you want me to use as a base,
> I can rebase and give you a new topic branch.

I've made a 'msr-bitmap' branch in my linux-retpoline.git tree¹ which
looks more like I expected. It's based on tip/x86/pti.

In the ibpb branch (on which I've just done a pass over Karim's patches
and would appreciate more feedback while he fixes up some remaining
details and prepares to send it out again) I have deliberately done a
merge from that branch, with the intention that I can go back and do a
pull from your branch instead.

All the IBRS bits are now in the 'ibrs' branch. As discussed, I'll keep
rebasing those on top of what we have, for now.

¹ http://git.infradead.org/users/dwmw2/linux-retpoline.git
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