linux-kernel - [tip: x86/cpu] x86/cpu/centaur: Add Centaur family >=7 CPUs initialization support

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Message-ID: <159981765454.4289.4295139362994948061.tip-bot2@tip-bot2>
Date:   Fri, 11 Sep 2020 09:47:34 -0000
From:   "tip-bot2 for Tony W Wang-oc" <tip-bot2@...utronix.de>
To:     linux-tip-commits@...r.kernel.org
Cc:     "Tony W Wang-oc" <TonyWWang-oc@...oxin.com>,
        Borislav Petkov <bp@...e.de>, x86 <x86@...nel.org>,
        LKML <linux-kernel@...r.kernel.org>
Subject: [tip: x86/cpu] x86/cpu/centaur: Add Centaur family >=7 CPUs
 initialization support

The following commit has been merged into the x86/cpu branch of tip:

Commit-ID:     33b4711df4c1b3aec7c267c60fc24abccfadd40c
Gitweb:        https://git.kernel.org/tip/33b4711df4c1b3aec7c267c60fc24abccfadd40c
Author:        Tony W Wang-oc <TonyWWang-oc@...oxin.com>
AuthorDate:    Tue, 08 Sep 2020 18:57:46 +08:00
Committer:     Borislav Petkov <bp@...e.de>
CommitterDate: Fri, 11 Sep 2020 10:53:19 +02:00

x86/cpu/centaur: Add Centaur family >=7 CPUs initialization support

Add Centaur family >=7 CPUs specific initialization support.

Signed-off-by: Tony W Wang-oc <TonyWWang-oc@...oxin.com>
Signed-off-by: Borislav Petkov <bp@...e.de>
Link: https://lkml.kernel.org/r/1599562666-31351-3-git-send-email-TonyWWang-oc@zhaoxin.com
---
 arch/x86/kernel/cpu/centaur.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/arch/x86/kernel/cpu/centaur.c b/arch/x86/kernel/cpu/centaur.c
index 5f81158..345f7d9 100644
--- a/arch/x86/kernel/cpu/centaur.c
+++ b/arch/x86/kernel/cpu/centaur.c
@@ -65,6 +65,9 @@ static void init_c3(struct cpuinfo_x86 *c)
 		c->x86_cache_alignment = c->x86_clflush_size * 2;
 		set_cpu_cap(c, X86_FEATURE_REP_GOOD);
 	}
+
+	if (c->x86 >= 7)
+		set_cpu_cap(c, X86_FEATURE_REP_GOOD);
 }
 
 enum {
@@ -95,7 +98,8 @@ static void early_init_centaur(struct cpuinfo_x86 *c)
 	if (c->x86 == 5)
 		set_cpu_cap(c, X86_FEATURE_CENTAUR_MCR);
 #endif
-	if (c->x86 == 6 && c->x86_model >= 0xf)
+	if ((c->x86 == 6 && c->x86_model >= 0xf) ||
+	    (c->x86 >= 7))
 		set_cpu_cap(c, X86_FEATURE_CONSTANT_TSC);
 
 #ifdef CONFIG_X86_64
@@ -204,7 +208,7 @@ static void init_centaur(struct cpuinfo_x86 *c)
 		sprintf(c->x86_model_id, "WinChip %s", name);
 	}
 #endif
-	if (c->x86 == 6)
+	if (c->x86 == 6 || c->x86 >= 7)
 		init_c3(c);
 #ifdef CONFIG_X86_64
 	set_cpu_cap(c, X86_FEATURE_LFENCE_RDTSC);