From: Santosh Sivaraj <santosh@fossix.org>
To: linuxppc-dev <linuxppc-dev@lists.ozlabs.org>
Cc: "Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com>,
Mahesh Salgaonkar <mahesh@linux.ibm.com>,
Nicholas Piggin <npiggin@gmail.com>,
Chandan Rajendra <chandan@linux.vnet.ibm.com>,
Reza Arbab <arbab@linux.ibm.com>
Subject: [v2 03/12] powerpc/mce: Add MCE notification chain
Date: Tue, 2 Jul 2019 10:49:23 +0530 [thread overview]
Message-ID: <20190702051932.511-4-santosh@fossix.org> (raw)
In-Reply-To: <20190702051932.511-1-santosh@fossix.org>
From: Reza Arbab <arbab@linux.ibm.com>
Signed-off-by: Reza Arbab <arbab@linux.ibm.com>
---
arch/powerpc/include/asm/asm-prototypes.h | 1 +
arch/powerpc/include/asm/mce.h | 4 ++++
arch/powerpc/kernel/exceptions-64s.S | 4 ++++
arch/powerpc/kernel/mce.c | 22 ++++++++++++++++++++++
4 files changed, 31 insertions(+)
diff --git a/arch/powerpc/include/asm/asm-prototypes.h b/arch/powerpc/include/asm/asm-prototypes.h
index ec1c97a8e8cb..f66f26ef3ce0 100644
--- a/arch/powerpc/include/asm/asm-prototypes.h
+++ b/arch/powerpc/include/asm/asm-prototypes.h
@@ -72,6 +72,7 @@ void machine_check_exception(struct pt_regs *regs);
void emulation_assist_interrupt(struct pt_regs *regs);
long do_slb_fault(struct pt_regs *regs, unsigned long ea);
void do_bad_slb_fault(struct pt_regs *regs, unsigned long ea, long err);
+void machine_check_notify(struct pt_regs *regs);
/* signals, syscalls and interrupts */
long sys_swapcontext(struct ucontext __user *old_ctx,
diff --git a/arch/powerpc/include/asm/mce.h b/arch/powerpc/include/asm/mce.h
index 94888a7025b3..948bef579086 100644
--- a/arch/powerpc/include/asm/mce.h
+++ b/arch/powerpc/include/asm/mce.h
@@ -214,4 +214,8 @@ unsigned long addr_to_pfn(struct pt_regs *regs, unsigned long addr,
#ifdef CONFIG_PPC_BOOK3S_64
void flush_and_reload_slb(void);
#endif /* CONFIG_PPC_BOOK3S_64 */
+
+int mce_register_notifier(struct notifier_block *nb);
+int mce_unregister_notifier(struct notifier_block *nb);
+
#endif /* __ASM_PPC64_MCE_H__ */
diff --git a/arch/powerpc/kernel/exceptions-64s.S b/arch/powerpc/kernel/exceptions-64s.S
index 6b86055e5251..2e56014fca21 100644
--- a/arch/powerpc/kernel/exceptions-64s.S
+++ b/arch/powerpc/kernel/exceptions-64s.S
@@ -457,6 +457,10 @@ EXC_COMMON_BEGIN(machine_check_handle_early)
addi r3,r1,STACK_FRAME_OVERHEAD
bl machine_check_early
std r3,RESULT(r1) /* Save result */
+
+ addi r3,r1,STACK_FRAME_OVERHEAD
+ bl machine_check_notify
+
ld r12,_MSR(r1)
BEGIN_FTR_SECTION
b 4f
diff --git a/arch/powerpc/kernel/mce.c b/arch/powerpc/kernel/mce.c
index e78c4f18ea0a..24d350a934e4 100644
--- a/arch/powerpc/kernel/mce.c
+++ b/arch/powerpc/kernel/mce.c
@@ -42,6 +42,18 @@ static struct irq_work mce_event_process_work = {
DECLARE_WORK(mce_ue_event_work, machine_process_ue_event);
+static BLOCKING_NOTIFIER_HEAD(mce_notifier_list);
+
+int mce_register_notifier(struct notifier_block *nb)
+{
+ return blocking_notifier_chain_register(&mce_notifier_list, nb);
+}
+
+int mce_unregister_notifier(struct notifier_block *nb)
+{
+ return blocking_notifier_chain_unregister(&mce_notifier_list, nb);
+}
+
static void mce_set_error_info(struct machine_check_event *mce,
struct mce_error_info *mce_err)
{
@@ -635,3 +647,13 @@ long hmi_exception_realmode(struct pt_regs *regs)
return 1;
}
+
+void machine_check_notify(struct pt_regs *regs)
+{
+ struct machine_check_event evt;
+
+ if (!get_mce_event(&evt, MCE_EVENT_DONTRELEASE))
+ return;
+
+ blocking_notifier_call_chain(&mce_notifier_list, 0, &evt);
+}
--
2.20.1
next prev parent reply other threads:[~2019-07-02 6:39 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-02 5:19 [v2 00/12] powerpc: implement machine check safe memcpy Santosh Sivaraj
2019-07-02 5:19 ` [v2 01/12] powerpc/mce: Make machine_check_ue_event() static Santosh Sivaraj
2019-07-02 5:19 ` [v2 02/12] powerpc/mce: Bug fixes for MCE handling in kernel space Santosh Sivaraj
2019-07-02 5:19 ` Santosh Sivaraj [this message]
2019-07-02 14:55 ` [v2 03/12] powerpc/mce: Add MCE notification chain Reza Arbab
2019-07-02 5:19 ` [v2 04/12] powerpc/mce: Move machine_check_ue_event() call Santosh Sivaraj
2019-07-02 5:19 ` [v2 05/12] powerpc/mce: Allow notifier callback to handle MCE Santosh Sivaraj
2019-07-02 5:19 ` [v2 06/12] powerpc/mce: Add fixup address to UE events Santosh Sivaraj
2019-07-02 5:19 ` [v2 07/12] powerpc/memcpy: Add memcpy_mcsafe for pmem Santosh Sivaraj
2019-07-02 5:19 ` [v2 08/12] powerpc/mce: Handle memcpy_mcsafe() Santosh Sivaraj
2019-07-02 5:19 ` [v2 09/12] powerpc/mce: Enable MCE notifiers in external modules Santosh Sivaraj
2019-07-02 6:17 ` Nicholas Piggin
2019-07-02 9:33 ` Mahesh Jagannath Salgaonkar
2019-07-03 17:20 ` Reza Arbab
2019-07-04 2:36 ` Nicholas Piggin
2019-07-05 2:50 ` Reza Arbab
2019-07-05 5:29 ` Nicholas Piggin
2019-07-08 15:23 ` Reza Arbab
2019-07-02 5:19 ` [v2 10/12] powerpc/memcpy_mcsafe: return remaining bytes Santosh Sivaraj
2019-07-02 5:19 ` [v2 11/12] powerpc: add machine check safe copy_to_user Santosh Sivaraj
2019-07-02 5:19 ` [v2 12/12] powerpc/64s: Save r13 in machine_check_common_early Santosh Sivaraj
2019-07-02 6:19 ` Nicholas Piggin
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