2020-09-08 11:20:10

by Tony W Wang-oc

Subject: [PATCH v1 2/2] x86/cpu: add Centaur Family >=7 CPUs initialization support

add Centaur Family >=7 CPUs specific initialization support in centaur.c

Signed-off-by: Tony W Wang-oc <[email protected]>
---
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 5f811586..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);
--
2.7.4

2020-09-11 09:50:01

by tip-bot2 for Jacob Pan

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 <[email protected]>
AuthorDate: Tue, 08 Sep 2020 18:57:46 +08:00
Committer: Borislav Petkov <[email protected]>
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 <[email protected]>
Signed-off-by: Borislav Petkov <[email protected]>
Link: https://lkml.kernel.org/r/[email protected]
---
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);