linux-kernel - [PATCH V3 1/8] perf/x86/intel/P4: Unify logic for detecting HT

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Message-Id: <20220922133800.12918-2-rui.zhang@intel.com>
Date:   Thu, 22 Sep 2022 21:37:53 +0800
From:   Zhang Rui <rui.zhang@...el.com>
To:     linux-kernel@...r.kernel.org, x86@...nel.org,
        linux-hwmon@...r.kernel.org
Cc:     tglx@...utronix.de, mingo@...hat.com, bp@...en8.de,
        dave.hansen@...ux.intel.com, hpa@...or.com, peterz@...radead.org,
        corbet@....net, fenghua.yu@...el.com, jdelvare@...e.com,
        linux@...ck-us.net, len.brown@...el.com, rui.zhang@...el.com
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 <len.brown@...el.com>
Signed-off-by: Zhang Rui <rui.zhang@...el.com>
---
 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