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 the restrl_types header. 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> --- 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 4e2e731e7d89..a7dbd66927ba 100644 --- a/arch/x86/kernel/cpu/resctrl/rdtgroup.c +++ b/arch/x86/kernel/cpu/resctrl/rdtgroup.c @@ -1579,11 +1579,6 @@ 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 /** @@ -1608,9 +1603,9 @@ 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; @@ -1625,14 +1620,15 @@ 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; @@ -1643,9 +1639,11 @@ 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; @@ -1678,9 +1676,9 @@ 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); @@ -1694,7 +1692,7 @@ static void mon_event_config_write(void *info) static int 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}; int ret = 0; /* mon_config cannot be more than the supported set of events */ @@ -1707,8 +1705,10 @@ static int mbm_config_write_domain(struct rdt_resource *r, * 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) goto out; @@ -1720,7 +1720,7 @@ static int 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 bfc63e8219e5..975b80102fbe 100644 --- a/include/linux/resctrl.h +++ b/include/linux/resctrl.h @@ -192,6 +192,13 @@ struct resctrl_cpu_sync { u32 rmid; }; +struct resctrl_mon_config_info { + struct rdt_resource *r; + struct rdt_domain *d; + u32 evtid; + u32 mon_config; +}; + /* * Update and re-load this CPUs defaults. Called via IPI, takes a pointer to * struct resctrl_cpu_sync, or NULL. @@ -205,6 +212,8 @@ 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. -- 2.25.1