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Re: [Xen-devel] [PATCH v3 2/7] xen/nospec: Use always_inline to fix code gen for evaluate_nospec


  • To: Jan Beulich <jbeulich@xxxxxxxx>
  • From: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
  • Date: Tue, 29 Oct 2019 14:16:49 +0000
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  • Cc: Juergen Gross <jgross@xxxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, Julien Grall <julien@xxxxxxx>, Wei Liu <wl@xxxxxxx>, Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>, George Dunlap <George.Dunlap@xxxxxxxxxxxxx>, Norbert Manthey <nmanthey@xxxxxxxxx>, Ian Jackson <ian.jackson@xxxxxxxxxx>, Xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxxx>
  • Delivery-date: Tue, 29 Oct 2019 14:17:17 +0000
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  • List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
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On 29/10/2019 14:03, Jan Beulich wrote:
> On 29.10.2019 14:46, Andrew Cooper wrote:
>> If this patch series does not agreement, I will unblock livepatching on
>> 4.13 by committing the v2 patch which causes BRANCH_HARDEN to depend on
>> BROKEN and force it to be compiled out with no user choice at all.
>>
>> Unbreaking livepatching is strictly more important than keeping a brand
>> new feature in 4.13 in a broken form.  I've provided two alternative
>> strategies to fix the 4.13 blockers, but if noone can agree on which
>> approach to use, I will commit the simpler fix.
> As to unblocking live patching - may I ask you look at the symbol
> disambiguation patch I did submit? The thread here, as suggested
> before, should now be solely about code generation.

Right, but the current state of l1tf-barrier is also a 4.13 blocker too
- it is not in a shippable state.

It either wants compiling out totally (the v2 patch), or having the code
generation fixing (this v3 series), or some concrete 3rd suggestion.

> And just in
> case you've missed this: I did indicate I'm willing to give my
> ack on the v3 patch here, provided you adjust the description as
> asked for in my initial(?) reply.

I had missed that, yes.  I'll see about tweaking the commit message.

~Andrew

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