Commit-ID: 165371cf12415680ee4833bae63d08b2a4475ea4
Gitweb: https://git.kernel.org/tip/165371cf12415680ee4833bae63d08b2a4475ea4
Author: Reinette Chatre <reinette.chatre@xxxxxxxxx>
AuthorDate: Tue, 29 May 2018 05:57:48 -0700
Committer: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
CommitDate: Wed, 20 Jun 2018 00:56:35 +0200
x86/intel_rdt: Introduce pseudo-locked region
A pseudo-locked region is introduced representing an instance of a
pseudo-locked cache region. Each cache instance (domain) can support one
pseudo-locked region. Similarly a resource group can be used for one
pseudo-locked region.
Include a pointer to a pseudo-locked region from the domain and resource
group structures.
Signed-off-by: Reinette Chatre <reinette.chatre@xxxxxxxxx>
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: fenghua.yu@xxxxxxxxx
Cc: tony.luck@xxxxxxxxx
Cc: vikas.shivappa@xxxxxxxxxxxxxxx
Cc: gavin.hindman@xxxxxxxxx
Cc: jithu.joseph@xxxxxxxxx
Cc: dave.hansen@xxxxxxxxx
Cc: hpa@xxxxxxxxx
Link: https://lkml.kernel.org/r/9bdcbce670d1ca6067d6a0f2d1c27297901bc56a.1527593971.git.reinette.chatre@xxxxxxxxx
---
arch/x86/kernel/cpu/intel_rdt.h | 64 ++++++++++++++++++++++++++---------------
1 file changed, 41 insertions(+), 23 deletions(-)
diff --git a/arch/x86/kernel/cpu/intel_rdt.h b/arch/x86/kernel/cpu/intel_rdt.h
index c9b8d3d1d413..02ae088fd745 100644
--- a/arch/x86/kernel/cpu/intel_rdt.h
+++ b/arch/x86/kernel/cpu/intel_rdt.h
@@ -122,6 +122,20 @@ struct mongroup {
u32 rmid;
};
+/**
+ * struct pseudo_lock_region - pseudo-lock region information
+ * @r: RDT resource to which this pseudo-locked region
+ * belongs
+ * @d: RDT domain to which this pseudo-locked region
+ * belongs
+ * @cbm: bitmask of the pseudo-locked region
+ */
+struct pseudo_lock_region {
+ struct rdt_resource *r;
+ struct rdt_domain *d;
+ u32 cbm;
+};
+
/**
* struct rdtgroup - store rdtgroup's data in resctrl file system.
* @kn: kernfs node
@@ -135,17 +149,19 @@ struct mongroup {
* monitor only or ctrl_mon group
* @mon: mongroup related data
* @mode: mode of resource group
+ * @plr: pseudo-locked region
*/
struct rdtgroup {
- struct kernfs_node *kn;
- struct list_head rdtgroup_list;
- u32 closid;
- struct cpumask cpu_mask;
- int flags;
- atomic_t waitcount;
- enum rdt_group_type type;
- struct mongroup mon;
- enum rdtgrp_mode mode;
+ struct kernfs_node *kn;
+ struct list_head rdtgroup_list;
+ u32 closid;
+ struct cpumask cpu_mask;
+ int flags;
+ atomic_t waitcount;
+ enum rdt_group_type type;
+ struct mongroup mon;
+ enum rdtgrp_mode mode;
+ struct pseudo_lock_region *plr;
};
/* rdtgroup.flags */
@@ -246,22 +262,24 @@ struct mbm_state {
* @mbps_val: When mba_sc is enabled, this holds the bandwidth in MBps
* @new_ctrl: new ctrl value to be loaded
* @have_new_ctrl: did user provide new_ctrl for this domain
+ * @plr: pseudo-locked region (if any) associated with domain
*/
struct rdt_domain {
- struct list_head list;
- int id;
- struct cpumask cpu_mask;
- unsigned long *rmid_busy_llc;
- struct mbm_state *mbm_total;
- struct mbm_state *mbm_local;
- struct delayed_work mbm_over;
- struct delayed_work cqm_limbo;
- int mbm_work_cpu;
- int cqm_work_cpu;
- u32 *ctrl_val;
- u32 *mbps_val;
- u32 new_ctrl;
- bool have_new_ctrl;
+ struct list_head list;
+ int id;
+ struct cpumask cpu_mask;
+ unsigned long *rmid_busy_llc;
+ struct mbm_state *mbm_total;
+ struct mbm_state *mbm_local;
+ struct delayed_work mbm_over;
+ struct delayed_work cqm_limbo;
+ int mbm_work_cpu;
+ int cqm_work_cpu;
+ u32 *ctrl_val;
+ u32 *mbps_val;
+ u32 new_ctrl;
+ bool have_new_ctrl;
+ struct pseudo_lock_region *plr;
};
/**
--
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