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Re: [PATCH v2 1/3] xen/arm: set -mno-unaligned-access compiler option for Arm32
- To: Jan Beulich <jbeulich@xxxxxxxx>
- From: Juergen Gross <jgross@xxxxxxxx>
- Date: Wed, 6 Dec 2023 11:00:51 +0100
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- Cc: Stefano Stabellini <sstabellini@xxxxxxxxxx>, Julien Grall <julien@xxxxxxx>, Bertrand Marquis <bertrand.marquis@xxxxxxx>, Michal Orzel <michal.orzel@xxxxxxx>, Volodymyr Babchuk <Volodymyr_Babchuk@xxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx
- Delivery-date: Wed, 06 Dec 2023 10:01:04 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 06.12.23 09:44, Jan Beulich wrote:
On 06.12.2023 08:10, Juergen Gross wrote:
As the hypervisor is disabling unaligned accesses for Arm32, set the
-mno-unaligned-access compiler option for building. This will prohibit
unaligned accesses when e.g. accessing 2- or 4-byte data items in
packed data structures.
Signed-off-by: Juergen Gross <jgross@xxxxxxxx>
Assuming this will want backporting, should it have some Fixes: tag?
IMHO this might not be needed, but the Arm maintainers should have the
final say.
This option is especially important after the whole series has been
applied, as get_unaligned() and put_unaligned() can then be used in Arm32
code, too. And without the added option this could cause crashes.
Juergen
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