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Message-ID: <CAJcbSZG75_cHxWp2eJ+XPiKZMbf2NNGwoS+8qkmXQ=rH2FURCQ@mail.gmail.com>
Date: Mon, 13 Mar 2017 12:24:21 -0700
From: Thomas Garnier <thgarnie@...gle.com>
To: Boris Ostrovsky <boris.ostrovsky@...cle.com>
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Subject: Re: [Xen-devel] [PATCH v5 2/3] x86: Remap GDT tables in the Fixmap section
On Mon, Mar 13, 2017 at 11:32 AM, Boris Ostrovsky
<boris.ostrovsky@...cle.com> wrote:
> There are a couple of problems for Xen PV guests that need to be addressed:
> 1. Xen's set_fixmap op needs non-default handling for
> FIX_GDT_REMAP_BEGIN range
> 2. GDT remapping for PV guests needs to be RO for both 64 and 32-bit guests.
>
> I don't know how you prefer to deal with (2), patch below is one
> suggestion. With it all my boot tests (Xen and bare-metal) passed.
>
Good suggestion, I think I will use most of it. Thanks!
> One problem with applying it directly is that kernel becomes
> not-bisectable (Xen-wise) between patches 2 and 3 so perhaps you might
> pull some of the changes from patch 3 to patch 2.
>
Yes that make sense, I will have to add the global variable on patch 2
and rebase 3 correctly.
--
Thomas
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