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Re: [PATCH v6 5/5] xen/acpi: Parse PPTT to initialize CPU topology
- To: Hirokazu Takahashi <taka@xxxxxxxxxxxxx>
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Wed, 15 Jul 2026 08:12:57 +0200
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- Cc: "Mykyta_Poturai@xxxxxxxx" <Mykyta_Poturai@xxxxxxxx>, 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" <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- Delivery-date: Wed, 15 Jul 2026 06:13:19 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 14.07.2026 23:30, Hirokazu Takahashi wrote:
>>> diff --git a/xen/drivers/acpi/topology.c b/xen/drivers/acpi/topology.c
>>> index 56fcfa4945..e6dea527a6 100644
>>> --- a/xen/drivers/acpi/topology.c
>>> +++ b/xen/drivers/acpi/topology.c
>>
>>
>>> int __init acpi_init_cpu_topology(void)
>>> {
>>> + acpi_status status;
>>> + struct acpi_table_header *table_header;
>>> + const struct acpi_table_pptt *pptt;
>>> + unsigned int num_sockets = 0;
>>> + unsigned int num_clusters = 0;
>>> + unsigned int num_cores = 0;
>>> + unsigned int *socket_map = xmalloc_array(unsigned int, nr_cpu_ids);
>>> + unsigned int *cluster_map = xmalloc_array(unsigned int, nr_cpu_ids);
>>> + unsigned int *core_map = xmalloc_array(unsigned int, nr_cpu_ids);
>>
>> These have to be xzmalloc_array().
>
> xzalloc_array()
xvzalloc_array(). And the others xvmalloc_array(). See the top of
xen/xvmalloc.h.
Jan
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