linux-kernel - [PATCH 3/3] x86/Centaur: Report correct CPU/cache topology

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Message-ID: <1525314766-18910-4-git-send-email-davidwang@zhaoxin.com>
Date:   Thu, 3 May 2018 10:32:46 +0800
From:   David Wang <davidwang@...oxin.com>
To:     <tglx@...utronix.de>, <mingo@...hat.com>, <hpa@...or.com>,
        <gregkh@...uxfoundation.org>, <x86@...nel.org>,
        <linux-kernel@...r.kernel.org>
CC:     <brucechang@...-alliance.com>, <cooperyan@...oxin.com>,
        <qiyuanwang@...oxin.com>, <benjaminpan@...tech.com>,
        <lukelin@...cpu.com>, <timguo@...oxin.com>,
        David Wang <davidwang@...oxin.com>
Subject: [PATCH 3/3] x86/Centaur: Report correct CPU/cache topology

Centaur CPUs enumerate the cache topology in the same way as Intel CPUs,
but the function is unused so for. The Centaur init code also missies to
initialize x86_info::max_cores, so the CPU topology can't be described
correctly.

Initialize x86_info::max_cores and invoke init_intel_cacheinfo() to make
CPU and cache topology information available and correct.

Signed-off-by: David Wang <davidwang@...oxin.com>
---
 arch/x86/kernel/cpu/centaur.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/arch/x86/kernel/cpu/centaur.c b/arch/x86/kernel/cpu/centaur.c
index 80d5110..c265494 100644
--- a/arch/x86/kernel/cpu/centaur.c
+++ b/arch/x86/kernel/cpu/centaur.c
@@ -160,6 +160,11 @@ static void init_centaur(struct cpuinfo_x86 *c)
 	clear_cpu_cap(c, 0*32+31);
 #endif
 	early_init_centaur(c);
+	init_intel_cacheinfo(c);
+	c->x86_max_cores = detect_num_cpu_cores(c);
+#ifdef CONFIG_X86_32
+	detect_ht(c);
+#endif
 
 	if (c->cpuid_level > 9) {
 		unsigned int eax = cpuid_eax(10);
-- 
1.9.1