Messages in this thread Patch in this message | | | From | Dave Martin <> | Subject | [PATCH v2 16/35] x86/resctrl: Change mon_event_config_{read,write}() to be arch helpers | Date | Fri, 26 Apr 2024 16:08:45 +0100 |
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From: James Morse <james.morse@arm.com>
mon_event_config_{read,write}() are called via IPI and access model specific registers to do their work.
To support another architecture, this needs abstracting.
Rename mon_event_config_{read,write}() to have a "resctrl_arch_" prefix, and move their struct mon_config_info parameter into <linux/resctrl.h>. This allows another architecture to supply an implementation of these.
As struct mon_config_info is now exposed globally, give it a 'resctrl_' prefix. MPAM systems need access to the domain to do this work, add the resource and domain to struct resctrl_mon_config_info.
Signed-off-by: James Morse <james.morse@arm.com> Signed-off-by: Dave Martin <Dave.Martin@arm.com>
---
Changes in v2:
* [Whitespace only] Re-tabbed struct resctrl_mon_config_info in <linux/resctrl.h> to fit the prevailing style.
Non-functional change.
* [Commit message only] Reword to align with the actual naming of the definitions and destination header file. --- arch/x86/kernel/cpu/resctrl/rdtgroup.c | 34 +++++++++++++------------- include/linux/resctrl.h | 9 +++++++ 2 files changed, 26 insertions(+), 17 deletions(-)
diff --git a/arch/x86/kernel/cpu/resctrl/rdtgroup.c b/arch/x86/kernel/cpu/resctrl/rdtgroup.c index ee28266d7864..590a12df00b3 100644 --- a/arch/x86/kernel/cpu/resctrl/rdtgroup.c +++ b/arch/x86/kernel/cpu/resctrl/rdtgroup.c @@ -1578,11 +1578,6 @@ static int rdtgroup_size_show(struct kernfs_open_file *of, return ret; } -struct mon_config_info { - u32 evtid; - u32 mon_config; -}; - #define INVALID_CONFIG_INDEX UINT_MAX /** @@ -1607,9 +1602,9 @@ static inline unsigned int mon_event_config_index_get(u32 evtid) } } -static void mon_event_config_read(void *info) +void resctrl_arch_mon_event_config_read(void *info) { - struct mon_config_info *mon_info = info; + struct resctrl_mon_config_info *mon_info = info; unsigned int index; u64 msrval; @@ -1624,14 +1619,15 @@ static void mon_event_config_read(void *info) mon_info->mon_config = msrval & MAX_EVT_CONFIG_BITS; } -static void mondata_config_read(struct rdt_domain *d, struct mon_config_info *mon_info) +static void mondata_config_read(struct resctrl_mon_config_info *mon_info) { - smp_call_function_any(&d->cpu_mask, mon_event_config_read, mon_info, 1); + smp_call_function_any(&mon_info->d->cpu_mask, + resctrl_arch_mon_event_config_read, mon_info, 1); } static int mbm_config_show(struct seq_file *s, struct rdt_resource *r, u32 evtid) { - struct mon_config_info mon_info = {0}; + struct resctrl_mon_config_info mon_info = {0}; struct rdt_domain *dom; bool sep = false; @@ -1642,9 +1638,11 @@ static int mbm_config_show(struct seq_file *s, struct rdt_resource *r, u32 evtid if (sep) seq_puts(s, ";"); - memset(&mon_info, 0, sizeof(struct mon_config_info)); + memset(&mon_info, 0, sizeof(struct resctrl_mon_config_info)); + mon_info.r = r; + mon_info.d = dom; mon_info.evtid = evtid; - mondata_config_read(dom, &mon_info); + mondata_config_read(&mon_info); seq_printf(s, "%d=0x%02x", dom->id, mon_info.mon_config); sep = true; @@ -1677,9 +1675,9 @@ static int mbm_local_bytes_config_show(struct kernfs_open_file *of, return 0; } -static void mon_event_config_write(void *info) +void resctrl_arch_mon_event_config_write(void *info) { - struct mon_config_info *mon_info = info; + struct resctrl_mon_config_info *mon_info = info; unsigned int index; index = mon_event_config_index_get(mon_info->evtid); @@ -1693,14 +1691,16 @@ static void mon_event_config_write(void *info) static void mbm_config_write_domain(struct rdt_resource *r, struct rdt_domain *d, u32 evtid, u32 val) { - struct mon_config_info mon_info = {0}; + struct resctrl_mon_config_info mon_info = {0}; /* * Read the current config value first. If both are the same then * no need to write it again. */ + mon_info.r = r; + mon_info.d = d; mon_info.evtid = evtid; - mondata_config_read(d, &mon_info); + mondata_config_read(&mon_info); if (mon_info.mon_config == val) return; @@ -1712,7 +1712,7 @@ static void mbm_config_write_domain(struct rdt_resource *r, * are scoped at the domain level. Writing any of these MSRs * on one CPU is observed by all the CPUs in the domain. */ - smp_call_function_any(&d->cpu_mask, mon_event_config_write, + smp_call_function_any(&d->cpu_mask, resctrl_arch_mon_event_config_write, &mon_info, 1); /* diff --git a/include/linux/resctrl.h b/include/linux/resctrl.h index 1a8d44ef765b..e8d5f2828415 100644 --- a/include/linux/resctrl.h +++ b/include/linux/resctrl.h @@ -192,6 +192,13 @@ struct resctrl_cpu_defaults { u32 rmid; }; +struct resctrl_mon_config_info { + struct rdt_resource *r; + struct rdt_domain *d; + u32 evtid; + u32 mon_config; +}; + /** * resctrl_arch_sync_cpu_closid_rmid() - Refresh this CPU's CLOSID and RMID. * Call via IPI. @@ -216,6 +223,8 @@ struct rdt_domain *resctrl_arch_find_domain(struct rdt_resource *r, int id); int resctrl_arch_update_domains(struct rdt_resource *r, u32 closid); bool resctrl_arch_is_evt_configurable(enum resctrl_event_id evt); +void resctrl_arch_mon_event_config_write(void *info); +void resctrl_arch_mon_event_config_read(void *info); /* * Update the ctrl_val and apply this config right now. -- 2.34.1
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