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| author | James Morse <james.morse@arm.com> | 2025-03-11 21:37:02 +0300 |
|---|---|---|
| committer | Borislav Petkov (AMD) <bp@alien8.de> | 2025-03-12 14:23:30 +0300 |
| commit | 88464bff035ecb28f8bf52dd9728fdc1aca228f9 (patch) | |
| tree | 1ff64a3a318e24eb9e82facc5f1645917f85e3f1 /include/linux | |
| parent | 4b6bdbf27fcee16944911155293771b880344ef0 (diff) | |
| download | linux-88464bff035ecb28f8bf52dd9728fdc1aca228f9.tar.xz | |
x86/resctrl: Rewrite and move the for_each_*_rdt_resource() walkers
The for_each_*_rdt_resource() helpers walk the architecture's array of
structures, using the resctrl visible part as an iterator. These became
over-complex when the structures were split into a filesystem and
architecture-specific struct. This approach avoided the need to touch every
call site, and was done before there was a helper to retrieve a resource by
rid.
Once the filesystem parts of resctrl are moved to /fs/, both the arch's
resource array, and the definition of those structures is no longer
accessible. To support resctrl, each architecture would have to provide
equally complex macros.
Rewrite the macro to make use of resctrl_arch_get_resource(), and move these
to include/linux/resctrl.h so existing x86 arch code continues to use them.
Signed-off-by: James Morse <james.morse@arm.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: Shaopeng Tan <tan.shaopeng@jp.fujitsu.com>
Reviewed-by: Tony Luck <tony.luck@intel.com>
Reviewed-by: Reinette Chatre <reinette.chatre@intel.com>
Reviewed-by: Fenghua Yu <fenghuay@nvidia.com>
Reviewed-by: Babu Moger <babu.moger@amd.com>
Tested-by: Shaopeng Tan <tan.shaopeng@jp.fujitsu.com>
Tested-by: Peter Newman <peternewman@google.com>
Tested-by: Amit Singh Tomar <amitsinght@marvell.com> # arm64
Tested-by: Shanker Donthineni <sdonthineni@nvidia.com> # arm64
Tested-by: Babu Moger <babu.moger@amd.com>
Link: https://lore.kernel.org/r/20250311183715.16445-18-james.morse@arm.com
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/resctrl.h | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/include/linux/resctrl.h b/include/linux/resctrl.h index 487b9657a7b5..a392480dc4b6 100644 --- a/include/linux/resctrl.h +++ b/include/linux/resctrl.h @@ -26,6 +26,24 @@ int proc_resctrl_show(struct seq_file *m, /* max value for struct rdt_domain's mbps_val */ #define MBA_MAX_MBPS U32_MAX +/* Walk all possible resources, with variants for only controls or monitors. */ +#define for_each_rdt_resource(_r) \ + for ((_r) = resctrl_arch_get_resource(0); \ + (_r) && (_r)->rid < RDT_NUM_RESOURCES; \ + (_r) = resctrl_arch_get_resource((_r)->rid + 1)) + +#define for_each_capable_rdt_resource(r) \ + for_each_rdt_resource((r)) \ + if ((r)->alloc_capable || (r)->mon_capable) + +#define for_each_alloc_capable_rdt_resource(r) \ + for_each_rdt_resource((r)) \ + if ((r)->alloc_capable) + +#define for_each_mon_capable_rdt_resource(r) \ + for_each_rdt_resource((r)) \ + if ((r)->mon_capable) + /** * enum resctrl_conf_type - The type of configuration. * @CDP_NONE: No prioritisation, both code and data are controlled or monitored. |