]> git.ipfire.org Git - thirdparty/kernel/linux.git/commit
x86/resctrl: Always initialise rid field in rdt_resources_all[]
authorJames Morse <james.morse@arm.com>
Thu, 15 May 2025 16:58:53 +0000 (16:58 +0000)
committerBorislav Petkov (AMD) <bp@alien8.de>
Fri, 16 May 2025 12:35:22 +0000 (14:35 +0200)
commitf6b25be204b8661e4c32fa770a4c9e3a113ee325
treebb82998a92be93e3decfa12049a01470b2a747dd
parentb7b57edbf5681c7d0ed504a3a4e912bb68661ab9
x86/resctrl: Always initialise rid field in rdt_resources_all[]

x86 has an array, rdt_resources_all[], of all possible resources.
The for-each-resource walkers depend on the rid field of all
resources being initialised.

If the array ever grows due to another architecture adding a resource
type that is not defined on x86, the for-each-resources walkers will
loop forever.

Initialise all the rid values in resctrl_arch_late_init() before
any for-each-resource walker can be called.

Signed-off-by: James Morse <james.morse@arm.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: Reinette Chatre <reinette.chatre@intel.com>
Reviewed-by: Fenghua Yu <fenghuay@nvidia.com>
Tested-by: Fenghua Yu <fenghuay@nvidia.com>
Tested-by: Babu Moger <babu.moger@amd.com>
Tested-by: Shaopeng Tan <tan.shaopeng@jp.fujitsu.com>
Tested-by: Tony Luck <tony.luck@intel.com>
Link: https://lore.kernel.org/20250515165855.31452-24-james.morse@arm.com
arch/x86/kernel/cpu/resctrl/core.c