diff options
| author | Babu Moger <babu.moger@amd.com> | 2025-09-05 16:34:08 -0500 |
|---|---|---|
| committer | Borislav Petkov (AMD) <bp@alien8.de> | 2025-09-15 12:09:30 +0200 |
| commit | faebbc58cde9d8f6050ac152c34c88195ed4abaa (patch) | |
| tree | 547049b9c165a5f8996d4bb6d6de9dc06e67c798 /arch/x86/kernel/cpu/resctrl/internal.h | |
| parent | 13390861b426e936db20d675804a5b405622bc79 (diff) | |
x86/resctrl: Add support to enable/disable AMD ABMC feature
Add the functionality to enable/disable the AMD ABMC feature.
The AMD ABMC feature is enabled by setting enabled bit(0) in the
L3_QOS_EXT_CFG MSR. When the state of ABMC is changed, the MSR needs to be
updated on all the logical processors in the QOS Domain.
Hardware counters will reset when ABMC state is changed.
[ bp: Massage commit message. ]
Signed-off-by: Babu Moger <babu.moger@amd.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: Reinette Chatre <reinette.chatre@intel.com>
Link: https://lore.kernel.org/cover.1757108044.git.babu.moger@amd.com
Link: https://bugzilla.kernel.org/show_bug.cgi?id=206537 # [2]
Diffstat (limited to 'arch/x86/kernel/cpu/resctrl/internal.h')
| -rw-r--r-- | arch/x86/kernel/cpu/resctrl/internal.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/x86/kernel/cpu/resctrl/internal.h b/arch/x86/kernel/cpu/resctrl/internal.h index 58dca892a5df..a79a487e639c 100644 --- a/arch/x86/kernel/cpu/resctrl/internal.h +++ b/arch/x86/kernel/cpu/resctrl/internal.h @@ -37,6 +37,9 @@ struct arch_mbm_state { u64 prev_msr; }; +/* Setting bit 0 in L3_QOS_EXT_CFG enables the ABMC feature. */ +#define ABMC_ENABLE_BIT 0 + /** * struct rdt_hw_ctrl_domain - Arch private attributes of a set of CPUs that share * a resource for a control function @@ -102,6 +105,7 @@ struct msr_param { * @mon_scale: cqm counter * mon_scale = occupancy in bytes * @mbm_width: Monitor width, to detect and correct for overflow. * @cdp_enabled: CDP state of this resource + * @mbm_cntr_assign_enabled: ABMC feature is enabled * * Members of this structure are either private to the architecture * e.g. mbm_width, or accessed via helpers that provide abstraction. e.g. @@ -115,6 +119,7 @@ struct rdt_hw_resource { unsigned int mon_scale; unsigned int mbm_width; bool cdp_enabled; + bool mbm_cntr_assign_enabled; }; static inline struct rdt_hw_resource *resctrl_to_arch_res(struct rdt_resource *r) |