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Re: [PATCH v11 02/12] xen/arm: add initial support for LLC coloring on arm64
- To: Carlo Nonato <carlo.nonato@xxxxxxxxxxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- From: Michal Orzel <michal.orzel@xxxxxxx>
- Date: Thu, 5 Dec 2024 09:04:22 +0100
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- Cc: <andrea.bastoni@xxxxxxxxxxxxxxx>, <marco.solieri@xxxxxxxxxxxxxxx>, "Andrew Cooper" <andrew.cooper3@xxxxxxxxxx>, Jan Beulich <jbeulich@xxxxxxxx>, "Julien Grall" <julien@xxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, "Bertrand Marquis" <bertrand.marquis@xxxxxxx>, Volodymyr Babchuk <Volodymyr_Babchuk@xxxxxxxx>
- Delivery-date: Thu, 05 Dec 2024 08:04:38 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 02/12/2024 17:59, Carlo Nonato wrote:
>
>
> LLC coloring needs to know the last level cache layout in order to make the
> best use of it. This can be probed by inspecting the CLIDR_EL1 register,
> so the Last Level is defined as the last level visible by this register.
> Note that this excludes system caches in some platforms.
>
> Static memory allocation and cache coloring are incompatible because static
> memory can't be guaranteed to use only colors assigned to the domain.
> Panic during DomUs creation when both are enabled.
>
> Based on original work from: Luca Miccio <lucmiccio@xxxxxxxxx>
>
> Signed-off-by: Carlo Nonato <carlo.nonato@xxxxxxxxxxxxxxx>
> Signed-off-by: Marco Solieri <marco.solieri@xxxxxxxxxxxxxxx>
> Reviewed-by: Michal Orzel <michal.orzel@xxxxxxx>
> Acked-by: Jan Beulich <jbeulich@xxxxxxxx>
[...]
> + isb();
Attempt to build this patch with LLC_COLORING=y results in:
error: implicit declaration of function 'isb'
You need to include <asm/system.h>
Please, always try to make sure that each patch can be built successfully.
~Michal
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