6.11-stable review patch. If anyone has any objections, please let me know.
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From: Dhananjay Ugwekar Dhananjay.Ugwekar@amd.com
[ Upstream commit 26096aed255fbac9501718174dbb24c935d8854e ]
After commit ("x86/cpu/topology: Add support for the AMD 0x80000026 leaf"), on AMD processors that support extended CPUID leaf 0x80000026, the topology_logical_die_id() macros, no longer returns package id, instead it returns the CCD (Core Complex Die) id. This leads to the energy-pkg event scope to be modified to CCD instead of package.
For more historical context, please refer to commit 32fb480e0a2c ("powercap/intel_rapl: Support multi-die/package"), which initially changed the RAPL scope from package to die for all systems, as Intel systems with Die enumeration have RAPL scope as die, and those without die enumeration are not affected. So, all systems(Intel, AMD, Hygon), worked correctly with topology_logical_die_id() until recently, but this changed after the "0x80000026 leaf" commit mentioned above.
Future multi-die Intel systems will have package scope RAPL counters, but they will be using TPMI RAPL interface, which is not affected by this change.
Replacing topology_logical_die_id() with topology_physical_package_id() conditionally only for AMD and Hygon fixes the energy-pkg event.
On an AMD 2 socket 8 CCD Zen4 server:
Before:
linux$ ls /sys/class/powercap/ intel-rapl intel-rapl:4 intel-rapl:8:0 intel-rapl:d intel-rapl:0 intel-rapl:4:0 intel-rapl:9 intel-rapl:d:0 intel-rapl:0:0 intel-rapl:5 intel-rapl:9:0 intel-rapl:e intel-rapl:1 intel-rapl:5:0 intel-rapl:a intel-rapl:e:0 intel-rapl:1:0 intel-rapl:6 intel-rapl:a:0 intel-rapl:f intel-rapl:2 intel-rapl:6:0 intel-rapl:b intel-rapl:f:0 intel-rapl:2:0 intel-rapl:7 intel-rapl:b:0 intel-rapl:3 intel-rapl:7:0 intel-rapl:c intel-rapl:3:0 intel-rapl:8 intel-rapl:c:0
After:
linux$ ls /sys/class/powercap/ intel-rapl intel-rapl:0 intel-rapl:0:0 intel-rapl:1 intel-rapl:1:0
Only one sysfs entry per-event per-package is created after this change.
Fixes: 63edbaa48a57 ("x86/cpu/topology: Add support for the AMD 0x80000026 leaf") Reported-by: Michael Larabel michael@michaellarabel.com Signed-off-by: Dhananjay Ugwekar Dhananjay.Ugwekar@amd.com Reviewed-by: Zhang Rui rui.zhang@intel.com Link: https://patch.msgid.link/20240730044917.4680-3-Dhananjay.Ugwekar@amd.com Signed-off-by: Rafael J. Wysocki rafael.j.wysocki@intel.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/powercap/intel_rapl_common.c | 34 ++++++++++++++++++++++++---- 1 file changed, 30 insertions(+), 4 deletions(-)
diff --git a/drivers/powercap/intel_rapl_common.c b/drivers/powercap/intel_rapl_common.c index 8b7a5a31e8c17..5a6d05bf847ce 100644 --- a/drivers/powercap/intel_rapl_common.c +++ b/drivers/powercap/intel_rapl_common.c @@ -2129,6 +2129,21 @@ void rapl_remove_package(struct rapl_package *rp) } EXPORT_SYMBOL_GPL(rapl_remove_package);
+/* + * RAPL Package energy counter scope: + * 1. AMD/HYGON platforms use per-PKG package energy counter + * 2. For Intel platforms + * 2.1 CLX-AP platform has per-DIE package energy counter + * 2.2 Other platforms that uses MSR RAPL are single die systems so the + * package energy counter can be considered as per-PKG/per-DIE, + * here it is considered as per-DIE. + * 2.3 New platforms that use TPMI RAPL doesn't care about the + * scope because they are not MSR/CPU based. + */ +#define rapl_msrs_are_pkg_scope() \ + (boot_cpu_data.x86_vendor == X86_VENDOR_AMD || \ + boot_cpu_data.x86_vendor == X86_VENDOR_HYGON) + /* caller to ensure CPU hotplug lock is held */ struct rapl_package *rapl_find_package_domain_cpuslocked(int id, struct rapl_if_priv *priv, bool id_is_cpu) @@ -2136,8 +2151,14 @@ struct rapl_package *rapl_find_package_domain_cpuslocked(int id, struct rapl_if_ struct rapl_package *rp; int uid;
- if (id_is_cpu) - uid = topology_logical_die_id(id); + if (id_is_cpu) { + uid = rapl_msrs_are_pkg_scope() ? + topology_physical_package_id(id) : topology_logical_die_id(id); + if (uid < 0) { + pr_err("topology_logical_(package/die)_id() returned a negative value"); + return ERR_PTR(-EINVAL); + } + } else uid = id;
@@ -2169,9 +2190,14 @@ struct rapl_package *rapl_add_package_cpuslocked(int id, struct rapl_if_priv *pr return ERR_PTR(-ENOMEM);
if (id_is_cpu) { - rp->id = topology_logical_die_id(id); + rp->id = rapl_msrs_are_pkg_scope() ? + topology_physical_package_id(id) : topology_logical_die_id(id); + if ((int)(rp->id) < 0) { + pr_err("topology_logical_(package/die)_id() returned a negative value"); + return ERR_PTR(-EINVAL); + } rp->lead_cpu = id; - if (topology_max_dies_per_package() > 1) + if (!rapl_msrs_are_pkg_scope() && topology_max_dies_per_package() > 1) snprintf(rp->name, PACKAGE_DOMAIN_NAME_LENGTH, "package-%d-die-%d", topology_physical_package_id(id), topology_die_id(id)); else