[PATCH 10/13] powerpc/mce: Enable MCE notifiers in external modules
From: Santosh Sivaraj <hidden>
Date: 2019-06-21 05:18:21
Subsystem:
linux for powerpc (32-bit and 64-bit), the rest · Maintainers:
Madhavan Srinivasan, Michael Ellerman, Linus Torvalds
From: Reza Arbab <redacted> Signed-off-by: Reza Arbab <redacted> --- arch/powerpc/kernel/exceptions-64s.S | 6 ++++++ arch/powerpc/kernel/mce.c | 2 ++ 2 files changed, 8 insertions(+)
diff --git a/arch/powerpc/kernel/exceptions-64s.S b/arch/powerpc/kernel/exceptions-64s.S
index c83e38a403fd..311f1392a2ec 100644
--- a/arch/powerpc/kernel/exceptions-64s.S
+++ b/arch/powerpc/kernel/exceptions-64s.S@@ -458,6 +458,12 @@ EXC_COMMON_BEGIN(machine_check_handle_early) bl machine_check_early std r3,RESULT(r1) /* Save result */ + /* Notifiers may be in a module, so enable virtual addressing. */ + mfmsr r11 + ori r11,r11,MSR_IR + ori r11,r11,MSR_DR + mtmsr r11 + addi r3,r1,STACK_FRAME_OVERHEAD bl machine_check_notify ld r11,RESULT(r1)
diff --git a/arch/powerpc/kernel/mce.c b/arch/powerpc/kernel/mce.c
index 9cb5a731377b..413f7866a9c4 100644
--- a/arch/powerpc/kernel/mce.c
+++ b/arch/powerpc/kernel/mce.c@@ -50,11 +50,13 @@ int mce_register_notifier(struct notifier_block *nb) { return blocking_notifier_chain_register(&mce_notifier_list, nb); } +EXPORT_SYMBOL_GPL(mce_register_notifier); int mce_unregister_notifier(struct notifier_block *nb) { return blocking_notifier_chain_unregister(&mce_notifier_list, nb); } +EXPORT_SYMBOL_GPL(mce_unregister_notifier); static int check_memcpy_mcsafe(struct notifier_block *nb, unsigned long val, void *data)
--
2.20.1