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authorBorislav Petkov <bp@suse.de>2017-01-23 21:35:14 +0300
committerIngo Molnar <mingo@kernel.org>2017-01-24 11:14:57 +0300
commit9026cc82b632ed1a859935c82ed8ad65f27f2781 (patch)
tree6034f0e9d4f9f1d8faac595580fdfe9c8722f441
parentcff4c0391a692cf9b89932c62a7f879fb3637148 (diff)
downloadlinux-9026cc82b632ed1a859935c82ed8ad65f27f2781.tar.xz
x86/ras, EDAC, acpi: Assign MCE notifier handlers a priority
Assign all notifiers on the MCE decode chain a priority so that they get called in the correct order. Suggested-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Borislav Petkov <bp@suse.de> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Tony Luck <tony.luck@intel.com> Cc: Yazen Ghannam <Yazen.Ghannam@amd.com> Cc: linux-edac <linux-edac@vger.kernel.org> Link: http://lkml.kernel.org/r/20170123183514.13356-10-bp@alien8.de Signed-off-by: Ingo Molnar <mingo@kernel.org>
-rw-r--r--arch/x86/include/asm/mce.h9
-rw-r--r--arch/x86/kernel/cpu/mcheck/mce.c8
-rw-r--r--drivers/acpi/acpi_extlog.c1
-rw-r--r--drivers/acpi/nfit/mce.c1
-rw-r--r--drivers/edac/i7core_edac.c1
-rw-r--r--drivers/edac/mce_amd.c1
-rw-r--r--drivers/edac/sb_edac.c3
-rw-r--r--drivers/edac/skx_edac.c3
8 files changed, 20 insertions, 7 deletions
diff --git a/arch/x86/include/asm/mce.h b/arch/x86/include/asm/mce.h
index 528f6ec897cb..e63873683d4a 100644
--- a/arch/x86/include/asm/mce.h
+++ b/arch/x86/include/asm/mce.h
@@ -189,6 +189,15 @@ extern struct mce_vendor_flags mce_flags;
extern struct mca_config mca_cfg;
extern struct mca_msr_regs msr_ops;
+
+enum mce_notifier_prios {
+ MCE_PRIO_SRAO = INT_MAX,
+ MCE_PRIO_EXTLOG = INT_MAX - 1,
+ MCE_PRIO_NFIT = INT_MAX - 2,
+ MCE_PRIO_EDAC = INT_MAX - 3,
+ MCE_PRIO_LOWEST = 0,
+};
+
extern void mce_register_decode_chain(struct notifier_block *nb);
extern void mce_unregister_decode_chain(struct notifier_block *nb);
diff --git a/arch/x86/kernel/cpu/mcheck/mce.c b/arch/x86/kernel/cpu/mcheck/mce.c
index 0fef5406f0eb..e39bbc0e7c8b 100644
--- a/arch/x86/kernel/cpu/mcheck/mce.c
+++ b/arch/x86/kernel/cpu/mcheck/mce.c
@@ -216,9 +216,7 @@ void mce_register_decode_chain(struct notifier_block *nb)
{
atomic_inc(&num_notifiers);
- /* Ensure SRAO notifier has the highest priority in the decode chain. */
- if (nb != &mce_srao_nb && nb->priority == INT_MAX)
- nb->priority -= 1;
+ WARN_ON(nb->priority > MCE_PRIO_LOWEST && nb->priority < MCE_PRIO_EDAC);
atomic_notifier_chain_register(&x86_mce_decoder_chain, nb);
}
@@ -582,7 +580,7 @@ static int srao_decode_notifier(struct notifier_block *nb, unsigned long val,
}
static struct notifier_block mce_srao_nb = {
.notifier_call = srao_decode_notifier,
- .priority = INT_MAX,
+ .priority = MCE_PRIO_SRAO,
};
static int mce_default_notifier(struct notifier_block *nb, unsigned long val,
@@ -608,7 +606,7 @@ static int mce_default_notifier(struct notifier_block *nb, unsigned long val,
static struct notifier_block mce_default_nb = {
.notifier_call = mce_default_notifier,
/* lowest prio, we want it to run last. */
- .priority = 0,
+ .priority = MCE_PRIO_LOWEST,
};
/*
diff --git a/drivers/acpi/acpi_extlog.c b/drivers/acpi/acpi_extlog.c
index b3842ffc19ba..a15270a806fc 100644
--- a/drivers/acpi/acpi_extlog.c
+++ b/drivers/acpi/acpi_extlog.c
@@ -212,6 +212,7 @@ static bool __init extlog_get_l1addr(void)
}
static struct notifier_block extlog_mce_dec = {
.notifier_call = extlog_print,
+ .priority = MCE_PRIO_EXTLOG,
};
static int __init extlog_init(void)
diff --git a/drivers/acpi/nfit/mce.c b/drivers/acpi/nfit/mce.c
index e5ce81c38eed..3ba1c3472cf9 100644
--- a/drivers/acpi/nfit/mce.c
+++ b/drivers/acpi/nfit/mce.c
@@ -90,6 +90,7 @@ static int nfit_handle_mce(struct notifier_block *nb, unsigned long val,
static struct notifier_block nfit_mce_dec = {
.notifier_call = nfit_handle_mce,
+ .priority = MCE_PRIO_NFIT,
};
void nfit_mce_register(void)
diff --git a/drivers/edac/i7core_edac.c b/drivers/edac/i7core_edac.c
index 69b5adead0ad..75ad847593b7 100644
--- a/drivers/edac/i7core_edac.c
+++ b/drivers/edac/i7core_edac.c
@@ -1835,6 +1835,7 @@ static int i7core_mce_check_error(struct notifier_block *nb, unsigned long val,
static struct notifier_block i7_mce_dec = {
.notifier_call = i7core_mce_check_error,
+ .priority = MCE_PRIO_EDAC,
};
struct memdev_dmi_entry {
diff --git a/drivers/edac/mce_amd.c b/drivers/edac/mce_amd.c
index ecad750fd090..0d9bc25543d8 100644
--- a/drivers/edac/mce_amd.c
+++ b/drivers/edac/mce_amd.c
@@ -1054,6 +1054,7 @@ amd_decode_mce(struct notifier_block *nb, unsigned long val, void *data)
static struct notifier_block amd_mce_dec_nb = {
.notifier_call = amd_decode_mce,
+ .priority = MCE_PRIO_EDAC,
};
static int __init mce_amd_init(void)
diff --git a/drivers/edac/sb_edac.c b/drivers/edac/sb_edac.c
index 54ae6dc45ab2..c585a014dd3d 100644
--- a/drivers/edac/sb_edac.c
+++ b/drivers/edac/sb_edac.c
@@ -3136,7 +3136,8 @@ static int sbridge_mce_check_error(struct notifier_block *nb, unsigned long val,
}
static struct notifier_block sbridge_mce_dec = {
- .notifier_call = sbridge_mce_check_error,
+ .notifier_call = sbridge_mce_check_error,
+ .priority = MCE_PRIO_EDAC,
};
/****************************************************************************
diff --git a/drivers/edac/skx_edac.c b/drivers/edac/skx_edac.c
index 79ef675e4d6f..1159dba4671f 100644
--- a/drivers/edac/skx_edac.c
+++ b/drivers/edac/skx_edac.c
@@ -1007,7 +1007,8 @@ static int skx_mce_check_error(struct notifier_block *nb, unsigned long val,
}
static struct notifier_block skx_mce_dec = {
- .notifier_call = skx_mce_check_error,
+ .notifier_call = skx_mce_check_error,
+ .priority = MCE_PRIO_EDAC,
};
static void skx_remove(void)