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Re: [Xen-devel] [PATCH v2] x86: refine link time stub area related assertion


  • To: Jan Beulich <jbeulich@xxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxxx>
  • From: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
  • Date: Thu, 16 Jan 2020 13:24:05 +0000
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  • Cc: Stefano Stabellini <sstabellini@xxxxxxxxxx>, Julien Grall <julien@xxxxxxx>, Wei Liu <wl@xxxxxxx>, Konrad Wilk <konrad.wilk@xxxxxxxxxx>, George Dunlap <George.Dunlap@xxxxxxxxxxxxx>, Ian Jackson <ian.jackson@xxxxxxxxxx>, Roger Pau Monné <roger.pau@xxxxxxxxxx>
  • Delivery-date: Thu, 16 Jan 2020 13:24:28 +0000
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  • List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
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On 16/01/2020 09:00, Jan Beulich wrote:
> While it has been me to introduce this, the use of | there has become
> (and perhaps was from the very beginning) misleading. Rather than
> avoiding the right side of it when linking the xen.efi intermediate file
> at a different base address, make the expression cope with that case,
> thus verifying placement on every step.
>
> Furthermore the original check was too strict: We don't use one page per
> CPU, so account for this as well. This involves moving the
> STUBS_PER_PAGE definition and making DIV_ROUND_UP() accessible from
> assembly (and hence the linker script); move a few other potentially
> generally useful definitions along with it.
>
> Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>

Reviewed-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>

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