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Subject[RFC PATCH V2 11/22] x86/intel_rdt: Associate pseudo-locked regions with its domain
Date
After a pseudo-locked region is locked it needs to be associated with
the RDT domain representing the pseudo-locked cache so that its life
cycle can be managed correctly.

Only a single pseudo-locked region can exist on any cache instance so we
maintain a single pointer to a pseudo-locked region from each RDT
domain.

Signed-off-by: Reinette Chatre <reinette.chatre@intel.com>
---
arch/x86/kernel/cpu/intel_rdt.h | 4 ++++
1 file changed, 4 insertions(+)

diff --git a/arch/x86/kernel/cpu/intel_rdt.h b/arch/x86/kernel/cpu/intel_rdt.h
index 060a0976ac00..f0e020686e99 100644
--- a/arch/x86/kernel/cpu/intel_rdt.h
+++ b/arch/x86/kernel/cpu/intel_rdt.h
@@ -187,6 +187,8 @@ struct mbm_state {
u64 prev_msr;
};

+struct pseudo_lock_region;
+
/**
* struct rdt_domain - group of cpus sharing an RDT resource
* @list: all instances of this resource
@@ -205,6 +207,7 @@ struct mbm_state {
* @ctrl_val: array of cache or mem ctrl values (indexed by CLOSID)
* @new_ctrl: new ctrl value to be loaded
* @have_new_ctrl: did user provide new_ctrl for this domain
+ * @plr: pseudo-locked region associated with this domain
*/
struct rdt_domain {
struct list_head list;
@@ -220,6 +223,7 @@ struct rdt_domain {
u32 *ctrl_val;
u32 new_ctrl;
bool have_new_ctrl;
+ struct pseudo_lock_region *plr;
};

/**
--
2.13.6
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