diff options
| author | Tony Luck <tony.luck@intel.com> | 2025-12-17 09:21:01 -0800 |
|---|---|---|
| committer | Borislav Petkov (AMD) <bp@alien8.de> | 2026-01-09 16:37:07 +0100 |
| commit | 2e53ad66686a46b141c3395719afeee3057ffe2f (patch) | |
| tree | 6ef0ba37b9639688e3ce0a7392106b73e20e0dba /fs/resctrl | |
| parent | 39208e73a40e0e81a5b12ddc11157c0a414df307 (diff) | |
| download | lwn-2e53ad66686a46b141c3395719afeee3057ffe2f.tar.gz lwn-2e53ad66686a46b141c3395719afeee3057ffe2f.zip | |
x86,fs/resctrl: Add and initialize a resource for package scope monitoring
Add a new PERF_PKG resource and introduce package level scope for monitoring
telemetry events so that CPU hotplug notifiers can build domains at the
package granularity.
Use the physical package ID available via topology_physical_package_id()
to identify the monitoring domains with package level scope. This enables
user space to use:
/sys/devices/system/cpu/cpuX/topology/physical_package_id
to identify the monitoring domain a CPU is associated with.
Signed-off-by: Tony Luck <tony.luck@intel.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: Reinette Chatre <reinette.chatre@intel.com>
Link: https://lore.kernel.org/20251217172121.12030-1-tony.luck@intel.com
Diffstat (limited to 'fs/resctrl')
| -rw-r--r-- | fs/resctrl/internal.h | 2 | ||||
| -rw-r--r-- | fs/resctrl/rdtgroup.c | 2 |
2 files changed, 4 insertions, 0 deletions
diff --git a/fs/resctrl/internal.h b/fs/resctrl/internal.h index 14e5a9ed1fbd..0110d1175398 100644 --- a/fs/resctrl/internal.h +++ b/fs/resctrl/internal.h @@ -255,6 +255,8 @@ struct rdtgroup { #define RFTYPE_ASSIGN_CONFIG BIT(11) +#define RFTYPE_RES_PERF_PKG BIT(12) + #define RFTYPE_CTRL_INFO (RFTYPE_INFO | RFTYPE_CTRL) #define RFTYPE_MON_INFO (RFTYPE_INFO | RFTYPE_MON) diff --git a/fs/resctrl/rdtgroup.c b/fs/resctrl/rdtgroup.c index 0e3b8bcf4e53..a06cefd2a09e 100644 --- a/fs/resctrl/rdtgroup.c +++ b/fs/resctrl/rdtgroup.c @@ -2396,6 +2396,8 @@ static unsigned long fflags_from_resource(struct rdt_resource *r) case RDT_RESOURCE_MBA: case RDT_RESOURCE_SMBA: return RFTYPE_RES_MB; + case RDT_RESOURCE_PERF_PKG: + return RFTYPE_RES_PERF_PKG; } return WARN_ON_ONCE(1); |