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| author | Ben Horgan <ben.horgan@arm.com> | 2026-05-06 11:28:52 +0300 |
|---|---|---|
| committer | Borislav Petkov (AMD) <bp@alien8.de> | 2026-05-07 17:29:14 +0300 |
| commit | ee3d4c81d89c92fbeb65807971ac22b3dfa49220 (patch) | |
| tree | 84909615c8f956a5c6107b8d0ad9fb2b2fc5c9a4 /include/linux/resctrl.h | |
| parent | f52abe6502413450b8d0ecaad2555bbe4c6242eb (diff) | |
| download | linux-ee3d4c81d89c92fbeb65807971ac22b3dfa49220.tar.xz | |
fs/resctrl: Add monitor property 'mbm_cntr_assign_fixed'
Commit
3b497c3f4f04 ("fs/resctrl: Introduce the interface to display monitoring modes")
introduced CONFIG_RESCTRL_ASSIGN_FIXED but left adding the Kconfig
entry until it was necessary. The counter assignment mode is fixed in
MPAM, even when there are assignable counters, and so addressing this
is needed to support MPAM.
To avoid the burden of another Kconfig entry, replace
CONFIG_RESCTRL_ASSIGN_FIXED with a new property in 'struct resctrl_mon',
'mbm_cntr_assign_fixed' to be set by the architecture.
Do not request the architecture to change the counter assignment mode if it
does not support doing so. Provide insight to user space about why such a
request fails.
Signed-off-by: Ben Horgan <ben.horgan@arm.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: Babu Moger <babu.moger@amd.com>
Reviewed-by: Reinette Chatre <reinette.chatre@intel.com>
Tested-by: Babu Moger <babu.moger@amd.com>
Link: https://lore.kernel.org/20260506082855.3694761-1-ben.horgan@arm.com
Diffstat (limited to 'include/linux/resctrl.h')
| -rw-r--r-- | include/linux/resctrl.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/resctrl.h b/include/linux/resctrl.h index 06e8c72e8660..73ff522448a0 100644 --- a/include/linux/resctrl.h +++ b/include/linux/resctrl.h @@ -294,6 +294,7 @@ enum resctrl_schema_fmt { * @mbm_assign_on_mkdir: True if counters should automatically be assigned to MBM * events of monitor groups created via mkdir. * @mbm_cntr_configurable: True if assignable counters are configurable. + * @mbm_cntr_assign_fixed: True if the counter assignment mode is fixed. */ struct resctrl_mon { u32 num_rmid; @@ -302,6 +303,7 @@ struct resctrl_mon { bool mbm_cntr_assignable; bool mbm_assign_on_mkdir; bool mbm_cntr_configurable; + bool mbm_cntr_assign_fixed; }; /** |