The mbm_cfg_mask field lists the bits that user-space can set when
configuring an event. This value is output via the last_cmd_status
file.
Once the filesystem parts of resctrl are moved to live in /fs/, the
struct rdt_hw_resource is inaccessible to the filesystem code. Because
this value is output to user-space, it has to be accessible to the
filesystem code.
Move it to struct rdt_resource.
Signed-off-by: James Morse <james.morse@arm.com>
Tested-by: Carl Worth <carl@os.amperecomputing.com> # arm64
Tested-by: Shaopeng Tan <tan.shaopeng@jp.fujitsu.com>
Reviewed-by: Shaopeng Tan <tan.shaopeng@jp.fujitsu.com>
Reviewed-by: Tony Luck <tony.luck@intel.com>
---
Changes since v5:
* Rephrased a comment to remove one vendors marketing name for the feature.
Change since v1:
* Reword comments to avoid being overly arch-specific.
---
arch/x86/kernel/cpu/resctrl/internal.h | 3 ---
arch/x86/kernel/cpu/resctrl/monitor.c | 2 +-
arch/x86/kernel/cpu/resctrl/rdtgroup.c | 5 ++---
include/linux/resctrl.h | 3 +++
4 files changed, 6 insertions(+), 7 deletions(-)
diff --git a/arch/x86/kernel/cpu/resctrl/internal.h b/arch/x86/kernel/cpu/resctrl/internal.h
index 4a5996d1e060..725f223ea07b 100644
--- a/arch/x86/kernel/cpu/resctrl/internal.h
+++ b/arch/x86/kernel/cpu/resctrl/internal.h
@@ -417,8 +417,6 @@ struct msr_param {
* @msr_update: Function pointer to update QOS MSRs
* @mon_scale: cqm counter * mon_scale = occupancy in bytes
* @mbm_width: Monitor width, to detect and correct for overflow.
- * @mbm_cfg_mask: Bandwidth sources that can be tracked when Bandwidth
- * Monitoring Event Configuration (BMEC) is supported.
* @cdp_enabled: CDP state of this resource
*
* Members of this structure are either private to the architecture
@@ -432,7 +430,6 @@ struct rdt_hw_resource {
void (*msr_update)(struct msr_param *m);
unsigned int mon_scale;
unsigned int mbm_width;
- unsigned int mbm_cfg_mask;
bool cdp_enabled;
};
diff --git a/arch/x86/kernel/cpu/resctrl/monitor.c b/arch/x86/kernel/cpu/resctrl/monitor.c
index 17968cafc288..d99a05fc1b44 100644
--- a/arch/x86/kernel/cpu/resctrl/monitor.c
+++ b/arch/x86/kernel/cpu/resctrl/monitor.c
@@ -1263,7 +1263,7 @@ int __init rdt_get_mon_l3_config(struct rdt_resource *r)
/* Detect list of bandwidth sources that can be tracked */
cpuid_count(0x80000020, 3, &eax, &ebx, &ecx, &edx);
- hw_res->mbm_cfg_mask = ecx & MAX_EVT_CONFIG_BITS;
+ r->mbm_cfg_mask = ecx & MAX_EVT_CONFIG_BITS;
}
r->mon_capable = true;
diff --git a/arch/x86/kernel/cpu/resctrl/rdtgroup.c b/arch/x86/kernel/cpu/resctrl/rdtgroup.c
index e7d1d8b6983d..a388ef66ef4c 100644
--- a/arch/x86/kernel/cpu/resctrl/rdtgroup.c
+++ b/arch/x86/kernel/cpu/resctrl/rdtgroup.c
@@ -1731,7 +1731,6 @@ static void mbm_config_write_domain(struct rdt_resource *r,
static int mon_config_write(struct rdt_resource *r, char *tok, u32 evtid)
{
- struct rdt_hw_resource *hw_res = resctrl_to_arch_res(r);
char *dom_str = NULL, *id_str;
unsigned long dom_id, val;
struct rdt_mon_domain *d;
@@ -1758,9 +1757,9 @@ static int mon_config_write(struct rdt_resource *r, char *tok, u32 evtid)
}
/* Value from user cannot be more than the supported set of events */
- if ((val & hw_res->mbm_cfg_mask) != val) {
+ if ((val & r->mbm_cfg_mask) != val) {
rdt_last_cmd_printf("Invalid event configuration: max valid mask is 0x%02x\n",
- hw_res->mbm_cfg_mask);
+ r->mbm_cfg_mask);
return -EINVAL;
}
diff --git a/include/linux/resctrl.h b/include/linux/resctrl.h
index 59d944e139f8..4d02e34c4401 100644
--- a/include/linux/resctrl.h
+++ b/include/linux/resctrl.h
@@ -217,6 +217,8 @@ enum resctrl_schema_fmt {
* @name: Name to use in "schemata" file.
* @schema_fmt: Which format string and parser is used for this schema.
* @evt_list: List of monitoring events
+ * @mbm_cfg_mask: Bandwidth sources that can be tracked when bandwidth
+ * monitoring events can be configured.
* @cdp_capable: Is the CDP feature available on this resource
*/
struct rdt_resource {
@@ -233,6 +235,7 @@ struct rdt_resource {
char *name;
enum resctrl_schema_fmt schema_fmt;
struct list_head evt_list;
+ unsigned int mbm_cfg_mask;
bool cdp_capable;
};
--
2.39.2