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Re: [PATCH v5 1/4] xen/device-tree: Parse 'cpu-map' node for CPU topology exploration
- To: Hirokazu Takahashi <taka@xxxxxxxxxxxxx>
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Fri, 10 Jul 2026 09:25:37 +0200
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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>, Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Anthony PERARD <anthony.perard@xxxxxxxxxx>, Roger Pau Monné <roger.pau@xxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx
- Delivery-date: Fri, 10 Jul 2026 07:25:43 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 10.07.2026 00:05, Hirokazu Takahashi wrote:
> --- a/xen/arch/arm/Kconfig
> +++ b/xen/arch/arm/Kconfig
> @@ -23,6 +23,7 @@ config ARM
> select HAS_STACK_PROTECTOR
> select HAS_STATIC_MEMORY
> select HAS_UBSAN
> + select HAS_GENERIC_CPU_TOPOLOGY
Please insert at the appropriate spot of this list, not at the bottom. We
try to keep such lists sorted (both for easier lookup and for reduced risk
of two patches colliding).
> --- a/xen/common/Kconfig
> +++ b/xen/common/Kconfig
> @@ -191,6 +191,21 @@ config VM_EVENT
> config NEEDS_LIBELF
> bool
>
> +config HAS_GENERIC_CPU_TOPOLOGY
> + bool
> +
> +config DT_CPU_TOPOLOGY
> + bool
> +
> +config GENERIC_CPU_TOPOLOGY
> + bool "CPU topology support (UNSUPPORTED)" if UNSUPPORTED
> + depends on HAS_GENERIC_CPU_TOPOLOGY
> + select DT_CPU_TOPOLOGY if DEVICE_TREE_PARSE
> + select ACPI_CPU_TOPOLOGY if ACPI
> + help
> + Retrieve CPU topology information from the device tree or the
> + ACPI PPTT to optimize virtual CPU scheduling.
> +
> config NUMA
> bool
I can't help the impression that none of my v4 comments were taken into
account. And not just here.
Jan
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