From 92bd5a1390335bb3cc76bdf1b4356edbc94d408d Mon Sep 17 00:00:00 2001 From: Babu Moger Date: Fri, 13 Jan 2023 09:20:37 -0600 Subject: x86/resctrl: Add interface to write mbm_total_bytes_config The event configuration for mbm_total_bytes can be changed by the user by writing to the file /sys/fs/resctrl/info/L3_MON/mbm_total_bytes_config. The event configuration settings are domain specific and affect all the CPUs in the domain. Following are the types of events supported: ==== =========================================================== Bits Description ==== =========================================================== 6 Dirty Victims from the QOS domain to all types of memory 5 Reads to slow memory in the non-local NUMA domain 4 Reads to slow memory in the local NUMA domain 3 Non-temporal writes to non-local NUMA domain 2 Non-temporal writes to local NUMA domain 1 Reads to memory in the non-local NUMA domain 0 Reads to memory in the local NUMA domain ==== =========================================================== For example: To change the mbm_total_bytes to count only reads on domain 0, the bits 0, 1, 4 and 5 needs to be set, which is 110011b (in hex 0x33). Run the command: $echo 0=0x33 > /sys/fs/resctrl/info/L3_MON/mbm_total_bytes_config To change the mbm_total_bytes to count all the slow memory reads on domain 1, the bits 4 and 5 needs to be set which is 110000b (in hex 0x30). Run the command: $echo 1=0x30 > /sys/fs/resctrl/info/L3_MON/mbm_total_bytes_config Signed-off-by: Babu Moger Signed-off-by: Borislav Petkov (AMD) Reviewed-by: Reinette Chatre Link: https://lore.kernel.org/r/20230113152039.770054-12-babu.moger@amd.com --- include/linux/resctrl.h | 11 +++++++++++ 1 file changed, 11 insertions(+) (limited to 'include/linux/resctrl.h') diff --git a/include/linux/resctrl.h b/include/linux/resctrl.h index 0cee154abc9f..8334eeacfec5 100644 --- a/include/linux/resctrl.h +++ b/include/linux/resctrl.h @@ -250,6 +250,17 @@ int resctrl_arch_rmid_read(struct rdt_resource *r, struct rdt_domain *d, void resctrl_arch_reset_rmid(struct rdt_resource *r, struct rdt_domain *d, u32 rmid, enum resctrl_event_id eventid); +/** + * resctrl_arch_reset_rmid_all() - Reset all private state associated with + * all rmids and eventids. + * @r: The resctrl resource. + * @d: The domain for which all architectural counter state will + * be cleared. + * + * This can be called from any CPU. + */ +void resctrl_arch_reset_rmid_all(struct rdt_resource *r, struct rdt_domain *d); + extern unsigned int resctrl_rmid_realloc_threshold; extern unsigned int resctrl_rmid_realloc_limit; -- cgit v1.2.3