2022-09-22 13:39:47

by Zhang, Rui

[permalink] [raw]
Subject: [PATCH V3 1/8] perf/x86/intel/P4: Unify logic for detecting HT

Any value larger than 1 suggests HT is supported.

Although smp_num_siblings cannot be larger than 2 on P4 platform, it is
better to keep the logic consistent across the kernel.

Reviewed-by: Len Brown <[email protected]>
Signed-off-by: Zhang Rui <[email protected]>
---
arch/x86/include/asm/perf_event_p4.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/include/asm/perf_event_p4.h b/arch/x86/include/asm/perf_event_p4.h
index 94de1a05aeba..b14e9a20a7c0 100644
--- a/arch/x86/include/asm/perf_event_p4.h
+++ b/arch/x86/include/asm/perf_event_p4.h
@@ -189,7 +189,7 @@ static inline int p4_ht_active(void)
static inline int p4_ht_thread(int cpu)
{
#ifdef CONFIG_SMP
- if (smp_num_siblings == 2)
+ if (smp_num_siblings > 1)
return cpu != cpumask_first(this_cpu_cpumask_var_ptr(cpu_sibling_map));
#endif
return 0;
--
2.25.1