The following commit has been merged into the perf/core branch of tip:
Commit-ID: 57e11990f45f89bc29d0f84dd7b13a4e4263eeb2
Gitweb: https://git.kernel.org/tip/57e11990f45f89bc29d0f84dd7b13a4e4263eeb2
Author: Sandipan Das <sandipan.das@xxxxxxx>
AuthorDate: Wed, 26 Jun 2024 13:19:42 +05:30
Committer: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
CommitterDate: Thu, 04 Jul 2024 16:00:41 +02:00
perf/x86/amd/uncore: Fix DF and UMC domain identification
For uncore PMUs, a single context is shared across all CPUs in a domain.
The domain can be a CCX, like in the case of the L3 PMU, or a socket,
like in the case of DF and UMC PMUs. This information is available via
the PMU's cpumask.
For contexts shared across a socket, the domain is currently determined
from topology_die_id() which is incorrect after the introduction of
commit 63edbaa48a57 ("x86/cpu/topology: Add support for the AMD
0x80000026 leaf") as it now returns a CCX identifier on Zen 4 and later
systems which support CPUID leaf 0x80000026.
Use topology_logical_package_id() instead as it always returns a socket
identifier irrespective of the availability of CPUID leaf 0x80000026.
Fixes: 63edbaa48a57 ("x86/cpu/topology: Add support for the AMD 0x80000026 leaf")
Signed-off-by: Sandipan Das <sandipan.das@xxxxxxx>
Signed-off-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx>
Link: https://lkml.kernel.org/r/20240626074942.1044818-1-sandipan.das@xxxxxxx
---
arch/x86/events/amd/uncore.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/arch/x86/events/amd/uncore.c b/arch/x86/events/amd/uncore.c
index a0b4405..0bfde2e 100644
--- a/arch/x86/events/amd/uncore.c
+++ b/arch/x86/events/amd/uncore.c
@@ -643,7 +643,7 @@ void amd_uncore_df_ctx_scan(struct amd_uncore *uncore, unsigned int cpu)
info.split.aux_data = 0;
info.split.num_pmcs = NUM_COUNTERS_NB;
info.split.gid = 0;
- info.split.cid = topology_die_id(cpu);
+ info.split.cid = topology_logical_package_id(cpu);
if (pmu_version >= 2) {
ebx.full = cpuid_ebx(EXT_PERFMON_DEBUG_FEATURES);
@@ -903,8 +903,8 @@ void amd_uncore_umc_ctx_scan(struct amd_uncore *uncore, unsigned int cpu)
cpuid(EXT_PERFMON_DEBUG_FEATURES, &eax, &ebx.full, &ecx, &edx);
info.split.aux_data = ecx; /* stash active mask */
info.split.num_pmcs = ebx.split.num_umc_pmc;
- info.split.gid = topology_die_id(cpu);
- info.split.cid = topology_die_id(cpu);
+ info.split.gid = topology_logical_package_id(cpu);
+ info.split.cid = topology_logical_package_id(cpu);
*per_cpu_ptr(uncore->info, cpu) = info;
}
|