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Groups > linux.kernel > #1519225
| From | Sebastian Andrzej Siewior <bigeasy@linutronix.de> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | [PATCH 4/7] x86/mcheck: Split threshold_cpu_callback into two callbacks |
| Date | 2016-11-10 18:50 +0100 |
| Message-ID | <sC1E6-QH-19@gated-at.bofh.it> (permalink) |
| References | <sBTGx-3Ex-11@gated-at.bofh.it> <sC1E6-QH-21@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
The threshold_cpu_callback callbacks looks like one of the notifier and
its arguments are almost the same. Split this out and have one ONLINE
and one DEAD callback. This will come handy later once the main code
gets changed to use the callback mechanism.
Also, handle threshold_cpu_callback_online() return value so we don't
continue if the function fails.
Boris Petkov removed the callback pointer and replaced it with proper
functions.
Cc: Tony Luck <tony.luck@intel.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: linux-edac@vger.kernel.org
Cc: x86@kernel.org
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---
arch/x86/include/asm/mce.h | 7 +++++--
arch/x86/kernel/cpu/mcheck/mce.c | 14 +++++++------
arch/x86/kernel/cpu/mcheck/mce_amd.c | 38 ++++++++++++++----------------------
3 files changed, 28 insertions(+), 31 deletions(-)
diff --git a/arch/x86/include/asm/mce.h b/arch/x86/include/asm/mce.h
index 9bd7ff5ffbcc..caafad4a211e 100644
--- a/arch/x86/include/asm/mce.h
+++ b/arch/x86/include/asm/mce.h
@@ -293,9 +293,7 @@ void do_machine_check(struct pt_regs *, long);
/*
* Threshold handler
*/
-
extern void (*mce_threshold_vector)(void);
-extern void (*threshold_cpu_callback)(unsigned long action, unsigned int cpu);
/* Deferred error interrupt handler */
extern void (*deferred_error_int_vector)(void);
@@ -377,7 +375,12 @@ struct smca_bank_info {
};
extern struct smca_bank_info smca_banks[MAX_NR_BANKS];
+extern int mce_threshold_create_device(unsigned int cpu);
+extern int mce_threshold_remove_device(unsigned int cpu);
+#else
+static inline int mce_threshold_create_device(unsigned int cpu) { return 0; };
+static inline int mce_threshold_remove_device(unsigned int cpu) { return 0; };
#endif
#endif /* _ASM_X86_MCE_H */
diff --git a/arch/x86/kernel/cpu/mcheck/mce.c b/arch/x86/kernel/cpu/mcheck/mce.c
index e9ffd6d9e32d..052b5e05c3c4 100644
--- a/arch/x86/kernel/cpu/mcheck/mce.c
+++ b/arch/x86/kernel/cpu/mcheck/mce.c
@@ -2255,8 +2255,6 @@ static struct bus_type mce_subsys = {
DEFINE_PER_CPU(struct device *, mce_device);
-void (*threshold_cpu_callback)(unsigned long action, unsigned int cpu);
-
static inline struct mce_bank *attr_to_bank(struct device_attribute *attr)
{
return container_of(attr, struct mce_bank, attr);
@@ -2512,13 +2510,17 @@ mce_cpu_callback(struct notifier_block *nfb, unsigned long action, void *hcpu)
switch (action & ~CPU_TASKS_FROZEN) {
case CPU_ONLINE:
+
mce_device_create(cpu);
- if (threshold_cpu_callback)
- threshold_cpu_callback(action, cpu);
+
+ if (mce_threshold_create_device(cpu)) {
+ mce_device_remove(cpu);
+ return NOTIFY_BAD;
+ }
+
break;
case CPU_DEAD:
- if (threshold_cpu_callback)
- threshold_cpu_callback(action, cpu);
+ mce_threshold_remove_device(cpu);
mce_device_remove(cpu);
mce_intel_hcpu_update(cpu);
diff --git a/arch/x86/kernel/cpu/mcheck/mce_amd.c b/arch/x86/kernel/cpu/mcheck/mce_amd.c
index e93580c82ef0..c33a3ee2e383 100644
--- a/arch/x86/kernel/cpu/mcheck/mce_amd.c
+++ b/arch/x86/kernel/cpu/mcheck/mce_amd.c
@@ -55,6 +55,8 @@
/* Threshold LVT offset is at MSR0xC0000410[15:12] */
#define SMCA_THR_LVT_OFF 0xF000
+static bool thresholding_en;
+
static const char * const th_names[] = {
"load_store",
"insn_fetch",
@@ -1077,10 +1079,13 @@ static void threshold_remove_bank(unsigned int cpu, int bank)
per_cpu(threshold_banks, cpu)[bank] = NULL;
}
-static void threshold_remove_device(unsigned int cpu)
+int mce_threshold_remove_device(unsigned int cpu)
{
unsigned int bank;
+ if (!thresholding_en)
+ return 0;
+
for (bank = 0; bank < mca_cfg.banks; ++bank) {
if (!(per_cpu(bank_map, cpu) & (1 << bank)))
continue;
@@ -1088,15 +1093,19 @@ static void threshold_remove_device(unsigned int cpu)
}
kfree(per_cpu(threshold_banks, cpu));
per_cpu(threshold_banks, cpu) = NULL;
+ return 0;
}
/* create dir/files for all valid threshold banks */
-static int threshold_create_device(unsigned int cpu)
+int mce_threshold_create_device(unsigned int cpu)
{
unsigned int bank;
struct threshold_bank **bp;
int err = 0;
+ if (!thresholding_en)
+ return 0;
+
bp = per_cpu(threshold_banks, cpu);
if (bp)
return 0;
@@ -1117,40 +1126,23 @@ static int threshold_create_device(unsigned int cpu)
}
return err;
err:
- threshold_remove_device(cpu);
+ mce_threshold_remove_device(cpu);
return err;
}
-/* get notified when a cpu comes on/off */
-static void
-amd_64_threshold_cpu_callback(unsigned long action, unsigned int cpu)
-{
- switch (action) {
- case CPU_ONLINE:
- case CPU_ONLINE_FROZEN:
- threshold_create_device(cpu);
- break;
- case CPU_DEAD:
- case CPU_DEAD_FROZEN:
- threshold_remove_device(cpu);
- break;
- default:
- break;
- }
-}
-
static __init int threshold_init_device(void)
{
unsigned lcpu = 0;
/* to hit CPUs online before the notifier is up */
for_each_online_cpu(lcpu) {
- int err = threshold_create_device(lcpu);
+ int err = mce_threshold_create_device(lcpu);
if (err)
return err;
}
- threshold_cpu_callback = amd_64_threshold_cpu_callback;
+
+ thresholding_en = true;
return 0;
}
--
2.10.2
Back to linux.kernel | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread
[PATCH 22/25] x86/mcheck: Do the init in one place Sebastian Andrzej Siewior <bigeasy@linutronix.de> - 2016-11-03 16:00 +0100
Re: [PATCH 22/25] x86/mcheck: Do the init in one place Borislav Petkov <bp@alien8.de> - 2016-11-07 19:50 +0100
Re: [PATCH 22/25] x86/mcheck: Do the init in one place "Luck, Tony" <tony.luck@intel.com> - 2016-11-07 20:00 +0100
Re: [PATCH 22/25] x86/mcheck: Do the init in one place Borislav Petkov <bp@alien8.de> - 2016-11-07 21:20 +0100
Re: [PATCH 22/25] x86/mcheck: Do the init in one place Borislav Petkov <bp@alien8.de> - 2016-11-08 10:30 +0100
Re: [PATCH 22/25] x86/mcheck: Do the init in one place Sebastian Andrzej Siewior <bigeasy@linutronix.de> - 2016-11-09 15:30 +0100
Re: [PATCH 22/25] x86/mcheck: Do the init in one place Borislav Petkov <bp@alien8.de> - 2016-11-09 16:40 +0100
Re: [PATCH 22/25] x86/mcheck: Do the init in one place Sebastian Andrzej Siewior <bigeasy@linutronix.de> - 2016-11-09 17:30 +0100
Re: [PATCH 22/25] x86/mcheck: Do the init in one place Borislav Petkov <bp@alien8.de> - 2016-11-09 18:10 +0100
Re: [PATCH 22/25] x86/mcheck: Do the init in one place Sebastian Andrzej Siewior <bigeasy@linutronix.de> - 2016-11-09 18:30 +0100
RE: [PATCH 22/25] x86/mcheck: Do the init in one place "Luck, Tony" <tony.luck@intel.com> - 2016-11-09 19:40 +0100
Re: [PATCH 22/25] x86/mcheck: Do the init in one place Sebastian Andrzej Siewior <bigeasy@linutronix.de> - 2016-11-10 10:10 +0100
Re: [PATCH 22/25] x86/mcheck: Do the init in one place Borislav Petkov <bp@alien8.de> - 2016-11-10 10:20 +0100
[PATCH 4/7] x86/mcheck: Split threshold_cpu_callback into two callbacks Sebastian Andrzej Siewior <bigeasy@linutronix.de> - 2016-11-10 18:50 +0100
[PATCH 3/7] x86/mcheck: Be prepared for a rollback back to the ONLINE state Sebastian Andrzej Siewior <bigeasy@linutronix.de> - 2016-11-10 18:50 +0100
[PATCH 1/7] x86/mcheck: Move threshold_create_device() Sebastian Andrzej Siewior <bigeasy@linutronix.de> - 2016-11-10 18:50 +0100
[PATCH 5/7] x86/mcheck: reorganize the hotplug callbacks Sebastian Andrzej Siewior <bigeasy@linutronix.de> - 2016-11-10 18:50 +0100
Re: [PATCH 5/7] x86/mcheck: reorganize the hotplug callbacks Borislav Petkov <bp@alien8.de> - 2016-11-11 20:00 +0100
Re: [PATCH 5/7] x86/mcheck: reorganize the hotplug callbacks Sebastian Andrzej Siewior <bigeasy@linutronix.de> - 2016-11-11 20:40 +0100
Re: [PATCH 5/7] x86/mcheck: reorganize the hotplug callbacks Borislav Petkov <bp@alien8.de> - 2016-11-11 21:00 +0100
[PATCH 2/7] x86/mcheck: Explicit cleanup on failure in mce_amd Sebastian Andrzej Siewior <bigeasy@linutronix.de> - 2016-11-10 18:50 +0100
[PATCH 6/7] x86/mcheck: Move CPU_ONLINE and CPU_DOWN_PREPARE to hotplug state machine Sebastian Andrzej Siewior <bigeasy@linutronix.de> - 2016-11-10 18:50 +0100
[PATCH 7/7] x86/mcheck: Move CPU_DEAD to hotplug state machine Sebastian Andrzej Siewior <bigeasy@linutronix.de> - 2016-11-10 18:50 +0100
x86/mcheck: convert to hotplug state engine, take #2 Sebastian Andrzej Siewior <bigeasy@linutronix.de> - 2016-11-10 18:50 +0100
Re: [PATCH 22/25] x86/mcheck: Do the init in one place Sebastian Andrzej Siewior <bigeasy@linutronix.de> - 2016-11-10 11:30 +0100
Re: [PATCH 22/25] x86/mcheck: Do the init in one place Thomas Gleixner <tglx@linutronix.de> - 2016-11-10 11:30 +0100
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