From: James Morse <james.morse@arm.com> maillist inclusion category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/I8T2RT Reference: https://git.kernel.org/pub/scm/linux/kernel/git/morse/linux.git/log/?h=mpam/... --------------------------- rdt_get_mon_l3_config() is called via the architecture's resctrl_late_init(), and initialises both architecture specific fields, such as hw_res->mon_scale and resctrl filesystem fields by calling dom_data_init(). To separate the filesystem and architecture parts of resctrl, this function needs splitting up. Add resctrl_mon_resource_init() to do the filesystem specific work, and call it from resctrl_init(). Signed-off-by: James Morse <james.morse@arm.com> Signed-off-by: Zeng Heng <zengheng4@huawei.com> --- arch/x86/kernel/cpu/resctrl/internal.h | 1 + arch/x86/kernel/cpu/resctrl/monitor.c | 22 +++++++++++++++------- arch/x86/kernel/cpu/resctrl/rdtgroup.c | 4 ++++ 3 files changed, 20 insertions(+), 7 deletions(-) diff --git a/arch/x86/kernel/cpu/resctrl/internal.h b/arch/x86/kernel/cpu/resctrl/internal.h index d79491769bcf..d2da875de4f5 100644 --- a/arch/x86/kernel/cpu/resctrl/internal.h +++ b/arch/x86/kernel/cpu/resctrl/internal.h @@ -541,6 +541,7 @@ int rdtgroup_mondata_show(struct seq_file *m, void *arg); void mon_event_read(struct rmid_read *rr, struct rdt_resource *r, struct rdt_domain *d, struct rdtgroup *rdtgrp, int evtid, int first); +int resctrl_mon_resource_init(void); void mbm_setup_overflow_handler(struct rdt_domain *dom, unsigned long delay_ms, int exclude_cpu); diff --git a/arch/x86/kernel/cpu/resctrl/monitor.c b/arch/x86/kernel/cpu/resctrl/monitor.c index 484ba10928f5..2f38a488689b 100644 --- a/arch/x86/kernel/cpu/resctrl/monitor.c +++ b/arch/x86/kernel/cpu/resctrl/monitor.c @@ -1004,12 +1004,26 @@ static void l3_mon_evt_init(struct rdt_resource *r) list_add_tail(&mbm_local_event.list, &r->evt_list); } +int resctrl_mon_resource_init(void) +{ + struct rdt_resource *r = resctrl_arch_get_resource(RDT_RESOURCE_L3); + int ret; + + ret = dom_data_init(r); + if (ret) + return ret; + + if (r->mon_capable) + l3_mon_evt_init(r); + + return 0; +} + int __init rdt_get_mon_l3_config(struct rdt_resource *r) { unsigned int mbm_offset = boot_cpu_data.x86_cache_mbm_width_offset; struct rdt_hw_resource *hw_res = resctrl_to_arch_res(r); unsigned int threshold; - int ret; resctrl_rmid_realloc_limit = boot_cpu_data.x86_cache_size * 1024; hw_res->mon_scale = boot_cpu_data.x86_cache_occ_scale; @@ -1037,10 +1051,6 @@ int __init rdt_get_mon_l3_config(struct rdt_resource *r) */ resctrl_rmid_realloc_threshold = resctrl_arch_round_mon_val(threshold); - ret = dom_data_init(r); - if (ret) - return ret; - if (rdt_cpu_has(X86_FEATURE_BMEC)) { u32 eax, ebx, ecx, edx; @@ -1058,8 +1068,6 @@ int __init rdt_get_mon_l3_config(struct rdt_resource *r) } } - l3_mon_evt_init(r); - r->mon_capable = true; return 0; diff --git a/arch/x86/kernel/cpu/resctrl/rdtgroup.c b/arch/x86/kernel/cpu/resctrl/rdtgroup.c index 93f3126318e7..18ea66eefd36 100644 --- a/arch/x86/kernel/cpu/resctrl/rdtgroup.c +++ b/arch/x86/kernel/cpu/resctrl/rdtgroup.c @@ -4135,6 +4135,10 @@ int __init resctrl_init(void) rdtgroup_setup_default(); + ret = resctrl_mon_resource_init(); + if (ret) + return ret; + ret = sysfs_create_mount_point(fs_kobj, "resctrl"); if (ret) return ret; -- 2.25.1