[PATCH v2 3/7] x86/resctrl: Add a new node-scoped resource to rdt_resources_all[]

Tony Luck
2023-06-21T17:40:49Z

Add a placeholder in the array of struct rdt_hw_resource to be used
for event monitoring of systems with Sub-NUMA Cluster enabled.

Update get_domain_id() to handle SCOPE_NODE.

Signed-off-by: Tony Luck <tony.luck@intel.com>
---
arch/x86/kernel/cpu/resctrl/internal.h | 4 +++-
arch/x86/kernel/cpu/resctrl/core.c | 12 ++++++++++++
2 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/arch/x86/kernel/cpu/resctrl/internal.h b/arch/x86/kernel/cpu/resctrl/internal.h
index 8275b8a74f7e..243017096ddf 100644
--- a/arch/x86/kernel/cpu/resctrl/internal.h
+++ b/arch/x86/kernel/cpu/resctrl/internal.h
@@ -435,6 +435,7 @@ enum resctrl_res_level {
RDT_RESOURCE_L2,
RDT_RESOURCE_MBA,
RDT_RESOURCE_SMBA,
+ RDT_RESOURCE_NODE,

/* Must be the last */
RDT_NUM_RESOURCES,
@@ -442,7 +443,8 @@ enum resctrl_res_level {

enum resctrl_scope {
SCOPE_L2_CACHE = 2,
- SCOPE_L3_CACHE = 3
+ SCOPE_L3_CACHE = 3,
+ SCOPE_NODE,
};

static inline struct rdt_resource *resctrl_inc(struct rdt_resource *res)
diff --git a/arch/x86/kernel/cpu/resctrl/core.c b/arch/x86/kernel/cpu/resctrl/core.c
index 6571514752f3..e4bd3072927c 100644
--- a/arch/x86/kernel/cpu/resctrl/core.c
+++ b/arch/x86/kernel/cpu/resctrl/core.c
@@ -112,6 +112,16 @@ struct rdt_hw_resource rdt_resources_all[] = {
.fflags = RFTYPE_RES_MB,
},
},
+ [RDT_RESOURCE_NODE] =
+ {
+ .r_resctrl = {
+ .rid = RDT_RESOURCE_NODE,
+ .name = "L3",
+ .scope = SCOPE_NODE,
+ .domains = domain_init(RDT_RESOURCE_NODE),
+ .fflags = 0,
+ },
+ },
};

/*
@@ -489,6 +499,8 @@ static int arch_domain_mbm_alloc(u32 num_rmid, struct rdt_hw_domain *hw_dom)

static int get_domain_id(int cpu, enum resctrl_scope scope)
{
+ if (scope == SCOPE_NODE)
+ return cpu_to_node(cpu);
return get_cpu_cacheinfo_id(cpu, scope);
}

--
2.40.1