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Re: [PATCH 00/65] x86: Support for CET Indirect Branch Tracking
- To: Andrew Cooper <amc96@xxxxxxxx>, Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Mon, 29 Nov 2021 10:18:53 +0100
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- Cc: Stefano Stabellini <sstabellini@xxxxxxxxxx>, Wei Liu <wl@xxxxxxx>, Julien Grall <julien@xxxxxxx>, Roger Pau Monné <roger.pau@xxxxxxxxxx>, Juergen Gross <jgross@xxxxxxxx>, Daniel Smith <dpsmith@xxxxxxxxxxxxxxxxxxxx>, Marek Marczykowski-Górecki <marmarek@xxxxxxxxxxxxxxxxxxxxxx>, Xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- Delivery-date: Mon, 29 Nov 2021 09:19:08 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 27.11.2021 00:49, Andrew Cooper wrote:
> Given that Marek has kindly hacked us up a check which should find any
> arbitrary violations, and on a small sample of builds, there are no
> violations, I suggest that we clean it up and put it as a check in the
> real build and enable it by default seeing as we're right at the start
> of the 4.17 dev window.
>
> If it is seen to trip (and it might well not), we can judge at that
> point whether to rearrange the code to avoid it, or drop the check.
> Until then however, it gives us a very strong security statement.
Sounds like a plan.
Jan
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