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ACPI: CPPC: Limit perf ctrs in PCC check only to online CPUs

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per_cpu(cpc_desc_ptr, cpu) object is initialized for only the online
CPU via acpi_soft_cpu_online() --> __acpi_processor_start() -->
acpi_cppc_processor_probe().

However the function cppc_perf_ctrs_in_pcc() checks if the CPPC
perf-ctrs are in a PCC region for all the present CPUs, which breaks
when the kernel is booted with "nosmt=force".

Hence, limit the check only to the online CPUs.

Fixes: ae2df912d1a5 ("ACPI: CPPC: Disable FIE if registers in PCC regions")
Reviewed-by: "Mario Limonciello (AMD) (kernel.org)" <superm1@kernel.org>
Signed-off-by: Gautham R. Shenoy <gautham.shenoy@amd.com>
Link: https://patch.msgid.link/20251107074145.2340-5-gautham.shenoy@amd.com
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Gautham R. Shenoy 2025-11-07 13:11:44 +05:30 committed by Rafael J. Wysocki
parent 8821c8e80a
commit 0fce758706
1 changed files with 1 additions and 1 deletions
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2
drivers/acpi/cppc_acpi.c
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@ -1435,7 +1435,7 @@ bool cppc_perf_ctrs_in_pcc(void)
{
int cpu;
for_each_present_cpu(cpu) {
for_each_online_cpu(cpu) {
struct cpc_register_resource *ref_perf_reg;
struct cpc_desc *cpc_desc;