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634 lines
19 KiB
634 lines
19 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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#ifndef _ASM_X86_RESCTRL_INTERNAL_H |
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#define _ASM_X86_RESCTRL_INTERNAL_H |
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#include <linux/sched.h> |
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#include <linux/kernfs.h> |
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#include <linux/fs_context.h> |
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#include <linux/jump_label.h> |
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#define MSR_IA32_L3_QOS_CFG 0xc81 |
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#define MSR_IA32_L2_QOS_CFG 0xc82 |
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#define MSR_IA32_L3_CBM_BASE 0xc90 |
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#define MSR_IA32_L2_CBM_BASE 0xd10 |
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#define MSR_IA32_MBA_THRTL_BASE 0xd50 |
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#define MSR_IA32_MBA_BW_BASE 0xc0000200 |
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#define MSR_IA32_QM_CTR 0x0c8e |
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#define MSR_IA32_QM_EVTSEL 0x0c8d |
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#define L3_QOS_CDP_ENABLE 0x01ULL |
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#define L2_QOS_CDP_ENABLE 0x01ULL |
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/* |
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* Event IDs are used to program IA32_QM_EVTSEL before reading event |
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* counter from IA32_QM_CTR |
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*/ |
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#define QOS_L3_OCCUP_EVENT_ID 0x01 |
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#define QOS_L3_MBM_TOTAL_EVENT_ID 0x02 |
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#define QOS_L3_MBM_LOCAL_EVENT_ID 0x03 |
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#define CQM_LIMBOCHECK_INTERVAL 1000 |
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#define MBM_CNTR_WIDTH_BASE 24 |
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#define MBM_OVERFLOW_INTERVAL 1000 |
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#define MAX_MBA_BW 100u |
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#define MBA_IS_LINEAR 0x4 |
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#define MBA_MAX_MBPS U32_MAX |
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#define MAX_MBA_BW_AMD 0x800 |
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#define MBM_CNTR_WIDTH_OFFSET_AMD 20 |
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#define RMID_VAL_ERROR BIT_ULL(63) |
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#define RMID_VAL_UNAVAIL BIT_ULL(62) |
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/* |
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* With the above fields in use 62 bits remain in MSR_IA32_QM_CTR for |
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* data to be returned. The counter width is discovered from the hardware |
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* as an offset from MBM_CNTR_WIDTH_BASE. |
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*/ |
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#define MBM_CNTR_WIDTH_OFFSET_MAX (62 - MBM_CNTR_WIDTH_BASE) |
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struct rdt_fs_context { |
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struct kernfs_fs_context kfc; |
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bool enable_cdpl2; |
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bool enable_cdpl3; |
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bool enable_mba_mbps; |
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}; |
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static inline struct rdt_fs_context *rdt_fc2context(struct fs_context *fc) |
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{ |
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struct kernfs_fs_context *kfc = fc->fs_private; |
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return container_of(kfc, struct rdt_fs_context, kfc); |
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} |
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DECLARE_STATIC_KEY_FALSE(rdt_enable_key); |
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DECLARE_STATIC_KEY_FALSE(rdt_mon_enable_key); |
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/** |
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* struct mon_evt - Entry in the event list of a resource |
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* @evtid: event id |
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* @name: name of the event |
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*/ |
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struct mon_evt { |
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u32 evtid; |
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char *name; |
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struct list_head list; |
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}; |
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/** |
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* struct mon_data_bits - Monitoring details for each event file |
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* @rid: Resource id associated with the event file. |
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* @evtid: Event id associated with the event file |
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* @domid: The domain to which the event file belongs |
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*/ |
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union mon_data_bits { |
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void *priv; |
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struct { |
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unsigned int rid : 10; |
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unsigned int evtid : 8; |
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unsigned int domid : 14; |
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} u; |
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}; |
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struct rmid_read { |
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struct rdtgroup *rgrp; |
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struct rdt_resource *r; |
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struct rdt_domain *d; |
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int evtid; |
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bool first; |
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u64 val; |
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}; |
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extern unsigned int resctrl_cqm_threshold; |
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extern bool rdt_alloc_capable; |
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extern bool rdt_mon_capable; |
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extern unsigned int rdt_mon_features; |
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enum rdt_group_type { |
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RDTCTRL_GROUP = 0, |
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RDTMON_GROUP, |
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RDT_NUM_GROUP, |
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}; |
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/** |
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* enum rdtgrp_mode - Mode of a RDT resource group |
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* @RDT_MODE_SHAREABLE: This resource group allows sharing of its allocations |
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* @RDT_MODE_EXCLUSIVE: No sharing of this resource group's allocations allowed |
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* @RDT_MODE_PSEUDO_LOCKSETUP: Resource group will be used for Pseudo-Locking |
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* @RDT_MODE_PSEUDO_LOCKED: No sharing of this resource group's allocations |
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* allowed AND the allocations are Cache Pseudo-Locked |
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* |
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* The mode of a resource group enables control over the allowed overlap |
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* between allocations associated with different resource groups (classes |
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* of service). User is able to modify the mode of a resource group by |
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* writing to the "mode" resctrl file associated with the resource group. |
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* |
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* The "shareable", "exclusive", and "pseudo-locksetup" modes are set by |
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* writing the appropriate text to the "mode" file. A resource group enters |
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* "pseudo-locked" mode after the schemata is written while the resource |
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* group is in "pseudo-locksetup" mode. |
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*/ |
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enum rdtgrp_mode { |
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RDT_MODE_SHAREABLE = 0, |
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RDT_MODE_EXCLUSIVE, |
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RDT_MODE_PSEUDO_LOCKSETUP, |
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RDT_MODE_PSEUDO_LOCKED, |
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/* Must be last */ |
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RDT_NUM_MODES, |
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}; |
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/** |
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* struct mongroup - store mon group's data in resctrl fs. |
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* @mon_data_kn kernlfs node for the mon_data directory |
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* @parent: parent rdtgrp |
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* @crdtgrp_list: child rdtgroup node list |
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* @rmid: rmid for this rdtgroup |
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*/ |
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struct mongroup { |
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struct kernfs_node *mon_data_kn; |
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struct rdtgroup *parent; |
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struct list_head crdtgrp_list; |
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u32 rmid; |
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}; |
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/** |
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* struct pseudo_lock_region - pseudo-lock region information |
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* @r: RDT resource to which this pseudo-locked region |
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* belongs |
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* @d: RDT domain to which this pseudo-locked region |
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* belongs |
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* @cbm: bitmask of the pseudo-locked region |
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* @lock_thread_wq: waitqueue used to wait on the pseudo-locking thread |
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* completion |
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* @thread_done: variable used by waitqueue to test if pseudo-locking |
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* thread completed |
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* @cpu: core associated with the cache on which the setup code |
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* will be run |
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* @line_size: size of the cache lines |
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* @size: size of pseudo-locked region in bytes |
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* @kmem: the kernel memory associated with pseudo-locked region |
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* @minor: minor number of character device associated with this |
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* region |
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* @debugfs_dir: pointer to this region's directory in the debugfs |
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* filesystem |
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* @pm_reqs: Power management QoS requests related to this region |
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*/ |
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struct pseudo_lock_region { |
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struct rdt_resource *r; |
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struct rdt_domain *d; |
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u32 cbm; |
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wait_queue_head_t lock_thread_wq; |
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int thread_done; |
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int cpu; |
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unsigned int line_size; |
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unsigned int size; |
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void *kmem; |
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unsigned int minor; |
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struct dentry *debugfs_dir; |
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struct list_head pm_reqs; |
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}; |
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/** |
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* struct rdtgroup - store rdtgroup's data in resctrl file system. |
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* @kn: kernfs node |
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* @rdtgroup_list: linked list for all rdtgroups |
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* @closid: closid for this rdtgroup |
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* @cpu_mask: CPUs assigned to this rdtgroup |
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* @flags: status bits |
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* @waitcount: how many cpus expect to find this |
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* group when they acquire rdtgroup_mutex |
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* @type: indicates type of this rdtgroup - either |
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* monitor only or ctrl_mon group |
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* @mon: mongroup related data |
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* @mode: mode of resource group |
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* @plr: pseudo-locked region |
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*/ |
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struct rdtgroup { |
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struct kernfs_node *kn; |
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struct list_head rdtgroup_list; |
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u32 closid; |
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struct cpumask cpu_mask; |
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int flags; |
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atomic_t waitcount; |
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enum rdt_group_type type; |
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struct mongroup mon; |
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enum rdtgrp_mode mode; |
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struct pseudo_lock_region *plr; |
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}; |
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/* rdtgroup.flags */ |
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#define RDT_DELETED 1 |
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/* rftype.flags */ |
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#define RFTYPE_FLAGS_CPUS_LIST 1 |
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/* |
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* Define the file type flags for base and info directories. |
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*/ |
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#define RFTYPE_INFO BIT(0) |
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#define RFTYPE_BASE BIT(1) |
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#define RF_CTRLSHIFT 4 |
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#define RF_MONSHIFT 5 |
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#define RF_TOPSHIFT 6 |
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#define RFTYPE_CTRL BIT(RF_CTRLSHIFT) |
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#define RFTYPE_MON BIT(RF_MONSHIFT) |
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#define RFTYPE_TOP BIT(RF_TOPSHIFT) |
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#define RFTYPE_RES_CACHE BIT(8) |
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#define RFTYPE_RES_MB BIT(9) |
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#define RF_CTRL_INFO (RFTYPE_INFO | RFTYPE_CTRL) |
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#define RF_MON_INFO (RFTYPE_INFO | RFTYPE_MON) |
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#define RF_TOP_INFO (RFTYPE_INFO | RFTYPE_TOP) |
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#define RF_CTRL_BASE (RFTYPE_BASE | RFTYPE_CTRL) |
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/* List of all resource groups */ |
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extern struct list_head rdt_all_groups; |
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extern int max_name_width, max_data_width; |
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int __init rdtgroup_init(void); |
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void __exit rdtgroup_exit(void); |
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/** |
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* struct rftype - describe each file in the resctrl file system |
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* @name: File name |
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* @mode: Access mode |
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* @kf_ops: File operations |
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* @flags: File specific RFTYPE_FLAGS_* flags |
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* @fflags: File specific RF_* or RFTYPE_* flags |
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* @seq_show: Show content of the file |
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* @write: Write to the file |
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*/ |
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struct rftype { |
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char *name; |
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umode_t mode; |
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const struct kernfs_ops *kf_ops; |
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unsigned long flags; |
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unsigned long fflags; |
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int (*seq_show)(struct kernfs_open_file *of, |
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struct seq_file *sf, void *v); |
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/* |
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* write() is the generic write callback which maps directly to |
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* kernfs write operation and overrides all other operations. |
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* Maximum write size is determined by ->max_write_len. |
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*/ |
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ssize_t (*write)(struct kernfs_open_file *of, |
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char *buf, size_t nbytes, loff_t off); |
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}; |
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/** |
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* struct mbm_state - status for each MBM counter in each domain |
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* @chunks: Total data moved (multiply by rdt_group.mon_scale to get bytes) |
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* @prev_msr Value of IA32_QM_CTR for this RMID last time we read it |
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* @prev_bw_msr:Value of previous IA32_QM_CTR for bandwidth counting |
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* @prev_bw The most recent bandwidth in MBps |
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* @delta_bw Difference between the current and previous bandwidth |
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* @delta_comp Indicates whether to compute the delta_bw |
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*/ |
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struct mbm_state { |
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u64 chunks; |
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u64 prev_msr; |
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u64 prev_bw_msr; |
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u32 prev_bw; |
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u32 delta_bw; |
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bool delta_comp; |
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}; |
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/** |
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* struct rdt_domain - group of cpus sharing an RDT resource |
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* @list: all instances of this resource |
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* @id: unique id for this instance |
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* @cpu_mask: which cpus share this resource |
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* @rmid_busy_llc: |
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* bitmap of which limbo RMIDs are above threshold |
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* @mbm_total: saved state for MBM total bandwidth |
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* @mbm_local: saved state for MBM local bandwidth |
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* @mbm_over: worker to periodically read MBM h/w counters |
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* @cqm_limbo: worker to periodically read CQM h/w counters |
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* @mbm_work_cpu: |
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* worker cpu for MBM h/w counters |
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* @cqm_work_cpu: |
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* worker cpu for CQM h/w counters |
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* @ctrl_val: array of cache or mem ctrl values (indexed by CLOSID) |
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* @mbps_val: When mba_sc is enabled, this holds the bandwidth in MBps |
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* @new_ctrl: new ctrl value to be loaded |
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* @have_new_ctrl: did user provide new_ctrl for this domain |
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* @plr: pseudo-locked region (if any) associated with domain |
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*/ |
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struct rdt_domain { |
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struct list_head list; |
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int id; |
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struct cpumask cpu_mask; |
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unsigned long *rmid_busy_llc; |
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struct mbm_state *mbm_total; |
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struct mbm_state *mbm_local; |
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struct delayed_work mbm_over; |
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struct delayed_work cqm_limbo; |
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int mbm_work_cpu; |
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int cqm_work_cpu; |
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u32 *ctrl_val; |
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u32 *mbps_val; |
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u32 new_ctrl; |
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bool have_new_ctrl; |
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struct pseudo_lock_region *plr; |
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}; |
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/** |
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* struct msr_param - set a range of MSRs from a domain |
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* @res: The resource to use |
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* @low: Beginning index from base MSR |
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* @high: End index |
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*/ |
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struct msr_param { |
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struct rdt_resource *res; |
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int low; |
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int high; |
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}; |
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/** |
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* struct rdt_cache - Cache allocation related data |
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* @cbm_len: Length of the cache bit mask |
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* @min_cbm_bits: Minimum number of consecutive bits to be set |
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* @cbm_idx_mult: Multiplier of CBM index |
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* @cbm_idx_offset: Offset of CBM index. CBM index is computed by: |
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* closid * cbm_idx_multi + cbm_idx_offset |
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* in a cache bit mask |
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* @shareable_bits: Bitmask of shareable resource with other |
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* executing entities |
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* @arch_has_sparse_bitmaps: True if a bitmap like f00f is valid. |
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* @arch_has_empty_bitmaps: True if the '0' bitmap is valid. |
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* @arch_has_per_cpu_cfg: True if QOS_CFG register for this cache |
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* level has CPU scope. |
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*/ |
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struct rdt_cache { |
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unsigned int cbm_len; |
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unsigned int min_cbm_bits; |
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unsigned int cbm_idx_mult; |
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unsigned int cbm_idx_offset; |
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unsigned int shareable_bits; |
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bool arch_has_sparse_bitmaps; |
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bool arch_has_empty_bitmaps; |
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bool arch_has_per_cpu_cfg; |
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}; |
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/** |
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* enum membw_throttle_mode - System's memory bandwidth throttling mode |
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* @THREAD_THROTTLE_UNDEFINED: Not relevant to the system |
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* @THREAD_THROTTLE_MAX: Memory bandwidth is throttled at the core |
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* always using smallest bandwidth percentage |
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* assigned to threads, aka "max throttling" |
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* @THREAD_THROTTLE_PER_THREAD: Memory bandwidth is throttled at the thread |
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*/ |
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enum membw_throttle_mode { |
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THREAD_THROTTLE_UNDEFINED = 0, |
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THREAD_THROTTLE_MAX, |
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THREAD_THROTTLE_PER_THREAD, |
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}; |
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/** |
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* struct rdt_membw - Memory bandwidth allocation related data |
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* @min_bw: Minimum memory bandwidth percentage user can request |
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* @bw_gran: Granularity at which the memory bandwidth is allocated |
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* @delay_linear: True if memory B/W delay is in linear scale |
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* @arch_needs_linear: True if we can't configure non-linear resources |
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* @throttle_mode: Bandwidth throttling mode when threads request |
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* different memory bandwidths |
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* @mba_sc: True if MBA software controller(mba_sc) is enabled |
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* @mb_map: Mapping of memory B/W percentage to memory B/W delay |
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*/ |
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struct rdt_membw { |
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u32 min_bw; |
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u32 bw_gran; |
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u32 delay_linear; |
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bool arch_needs_linear; |
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enum membw_throttle_mode throttle_mode; |
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bool mba_sc; |
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u32 *mb_map; |
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}; |
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static inline bool is_llc_occupancy_enabled(void) |
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{ |
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return (rdt_mon_features & (1 << QOS_L3_OCCUP_EVENT_ID)); |
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} |
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static inline bool is_mbm_total_enabled(void) |
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{ |
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return (rdt_mon_features & (1 << QOS_L3_MBM_TOTAL_EVENT_ID)); |
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} |
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static inline bool is_mbm_local_enabled(void) |
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{ |
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return (rdt_mon_features & (1 << QOS_L3_MBM_LOCAL_EVENT_ID)); |
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} |
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static inline bool is_mbm_enabled(void) |
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{ |
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return (is_mbm_total_enabled() || is_mbm_local_enabled()); |
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} |
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static inline bool is_mbm_event(int e) |
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{ |
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return (e >= QOS_L3_MBM_TOTAL_EVENT_ID && |
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e <= QOS_L3_MBM_LOCAL_EVENT_ID); |
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} |
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struct rdt_parse_data { |
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struct rdtgroup *rdtgrp; |
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char *buf; |
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}; |
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/** |
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* struct rdt_resource - attributes of an RDT resource |
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* @rid: The index of the resource |
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* @alloc_enabled: Is allocation enabled on this machine |
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* @mon_enabled: Is monitoring enabled for this feature |
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* @alloc_capable: Is allocation available on this machine |
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* @mon_capable: Is monitor feature available on this machine |
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* @name: Name to use in "schemata" file |
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* @num_closid: Number of CLOSIDs available |
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* @cache_level: Which cache level defines scope of this resource |
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* @default_ctrl: Specifies default cache cbm or memory B/W percent. |
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* @msr_base: Base MSR address for CBMs |
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* @msr_update: Function pointer to update QOS MSRs |
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* @data_width: Character width of data when displaying |
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* @domains: All domains for this resource |
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* @cache: Cache allocation related data |
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* @format_str: Per resource format string to show domain value |
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* @parse_ctrlval: Per resource function pointer to parse control values |
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* @evt_list: List of monitoring events |
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* @num_rmid: Number of RMIDs available |
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* @mon_scale: cqm counter * mon_scale = occupancy in bytes |
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* @fflags: flags to choose base and info files |
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*/ |
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struct rdt_resource { |
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int rid; |
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bool alloc_enabled; |
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bool mon_enabled; |
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bool alloc_capable; |
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bool mon_capable; |
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char *name; |
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int num_closid; |
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int cache_level; |
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u32 default_ctrl; |
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unsigned int msr_base; |
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void (*msr_update) (struct rdt_domain *d, struct msr_param *m, |
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struct rdt_resource *r); |
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int data_width; |
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struct list_head domains; |
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struct rdt_cache cache; |
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struct rdt_membw membw; |
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const char *format_str; |
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int (*parse_ctrlval)(struct rdt_parse_data *data, |
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struct rdt_resource *r, |
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struct rdt_domain *d); |
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struct list_head evt_list; |
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int num_rmid; |
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unsigned int mon_scale; |
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unsigned int mbm_width; |
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unsigned long fflags; |
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}; |
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int parse_cbm(struct rdt_parse_data *data, struct rdt_resource *r, |
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struct rdt_domain *d); |
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int parse_bw(struct rdt_parse_data *data, struct rdt_resource *r, |
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struct rdt_domain *d); |
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extern struct mutex rdtgroup_mutex; |
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extern struct rdt_resource rdt_resources_all[]; |
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extern struct rdtgroup rdtgroup_default; |
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DECLARE_STATIC_KEY_FALSE(rdt_alloc_enable_key); |
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extern struct dentry *debugfs_resctrl; |
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enum { |
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RDT_RESOURCE_L3, |
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RDT_RESOURCE_L3DATA, |
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RDT_RESOURCE_L3CODE, |
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RDT_RESOURCE_L2, |
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RDT_RESOURCE_L2DATA, |
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RDT_RESOURCE_L2CODE, |
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RDT_RESOURCE_MBA, |
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/* Must be the last */ |
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RDT_NUM_RESOURCES, |
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}; |
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#define for_each_rdt_resource(r) \ |
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for (r = rdt_resources_all; r < rdt_resources_all + RDT_NUM_RESOURCES;\ |
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r++) |
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#define for_each_capable_rdt_resource(r) \ |
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for (r = rdt_resources_all; r < rdt_resources_all + RDT_NUM_RESOURCES;\ |
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r++) \ |
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if (r->alloc_capable || r->mon_capable) |
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#define for_each_alloc_capable_rdt_resource(r) \ |
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for (r = rdt_resources_all; r < rdt_resources_all + RDT_NUM_RESOURCES;\ |
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r++) \ |
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if (r->alloc_capable) |
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#define for_each_mon_capable_rdt_resource(r) \ |
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for (r = rdt_resources_all; r < rdt_resources_all + RDT_NUM_RESOURCES;\ |
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r++) \ |
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if (r->mon_capable) |
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#define for_each_alloc_enabled_rdt_resource(r) \ |
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for (r = rdt_resources_all; r < rdt_resources_all + RDT_NUM_RESOURCES;\ |
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r++) \ |
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if (r->alloc_enabled) |
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|
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#define for_each_mon_enabled_rdt_resource(r) \ |
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for (r = rdt_resources_all; r < rdt_resources_all + RDT_NUM_RESOURCES;\ |
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r++) \ |
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if (r->mon_enabled) |
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|
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/* CPUID.(EAX=10H, ECX=ResID=1).EAX */ |
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union cpuid_0x10_1_eax { |
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struct { |
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unsigned int cbm_len:5; |
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} split; |
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unsigned int full; |
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}; |
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|
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/* CPUID.(EAX=10H, ECX=ResID=3).EAX */ |
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union cpuid_0x10_3_eax { |
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struct { |
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unsigned int max_delay:12; |
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} split; |
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unsigned int full; |
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}; |
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|
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/* CPUID.(EAX=10H, ECX=ResID).EDX */ |
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union cpuid_0x10_x_edx { |
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struct { |
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unsigned int cos_max:16; |
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} split; |
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unsigned int full; |
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}; |
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|
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void rdt_last_cmd_clear(void); |
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void rdt_last_cmd_puts(const char *s); |
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__printf(1, 2) |
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void rdt_last_cmd_printf(const char *fmt, ...); |
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|
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void rdt_ctrl_update(void *arg); |
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struct rdtgroup *rdtgroup_kn_lock_live(struct kernfs_node *kn); |
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void rdtgroup_kn_unlock(struct kernfs_node *kn); |
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int rdtgroup_kn_mode_restrict(struct rdtgroup *r, const char *name); |
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int rdtgroup_kn_mode_restore(struct rdtgroup *r, const char *name, |
|
umode_t mask); |
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struct rdt_domain *rdt_find_domain(struct rdt_resource *r, int id, |
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struct list_head **pos); |
|
ssize_t rdtgroup_schemata_write(struct kernfs_open_file *of, |
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char *buf, size_t nbytes, loff_t off); |
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int rdtgroup_schemata_show(struct kernfs_open_file *of, |
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struct seq_file *s, void *v); |
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bool rdtgroup_cbm_overlaps(struct rdt_resource *r, struct rdt_domain *d, |
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unsigned long cbm, int closid, bool exclusive); |
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unsigned int rdtgroup_cbm_to_size(struct rdt_resource *r, struct rdt_domain *d, |
|
unsigned long cbm); |
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enum rdtgrp_mode rdtgroup_mode_by_closid(int closid); |
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int rdtgroup_tasks_assigned(struct rdtgroup *r); |
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int rdtgroup_locksetup_enter(struct rdtgroup *rdtgrp); |
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int rdtgroup_locksetup_exit(struct rdtgroup *rdtgrp); |
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bool rdtgroup_cbm_overlaps_pseudo_locked(struct rdt_domain *d, unsigned long cbm); |
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bool rdtgroup_pseudo_locked_in_hierarchy(struct rdt_domain *d); |
|
int rdt_pseudo_lock_init(void); |
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void rdt_pseudo_lock_release(void); |
|
int rdtgroup_pseudo_lock_create(struct rdtgroup *rdtgrp); |
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void rdtgroup_pseudo_lock_remove(struct rdtgroup *rdtgrp); |
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struct rdt_domain *get_domain_from_cpu(int cpu, struct rdt_resource *r); |
|
int update_domains(struct rdt_resource *r, int closid); |
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int closids_supported(void); |
|
void closid_free(int closid); |
|
int alloc_rmid(void); |
|
void free_rmid(u32 rmid); |
|
int rdt_get_mon_l3_config(struct rdt_resource *r); |
|
void mon_event_count(void *info); |
|
int rdtgroup_mondata_show(struct seq_file *m, void *arg); |
|
void rmdir_mondata_subdir_allrdtgrp(struct rdt_resource *r, |
|
unsigned int dom_id); |
|
void mkdir_mondata_subdir_allrdtgrp(struct rdt_resource *r, |
|
struct rdt_domain *d); |
|
void mon_event_read(struct rmid_read *rr, struct rdt_resource *r, |
|
struct rdt_domain *d, struct rdtgroup *rdtgrp, |
|
int evtid, int first); |
|
void mbm_setup_overflow_handler(struct rdt_domain *dom, |
|
unsigned long delay_ms); |
|
void mbm_handle_overflow(struct work_struct *work); |
|
void __init intel_rdt_mbm_apply_quirk(void); |
|
bool is_mba_sc(struct rdt_resource *r); |
|
void setup_default_ctrlval(struct rdt_resource *r, u32 *dc, u32 *dm); |
|
u32 delay_bw_map(unsigned long bw, struct rdt_resource *r); |
|
void cqm_setup_limbo_handler(struct rdt_domain *dom, unsigned long delay_ms); |
|
void cqm_handle_limbo(struct work_struct *work); |
|
bool has_busy_rmid(struct rdt_resource *r, struct rdt_domain *d); |
|
void __check_limbo(struct rdt_domain *d, bool force_free); |
|
void rdt_domain_reconfigure_cdp(struct rdt_resource *r); |
|
void __init thread_throttle_mode_init(void); |
|
|
|
#endif /* _ASM_X86_RESCTRL_INTERNAL_H */
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