From 81e88fdc432a1552401d6e91a984dcccce72b8dc Mon Sep 17 00:00:00 2001
From: Huang Ying <ying.huang@intel.com>
Date: Wed, 12 Jan 2011 14:44:55 +0800
Subject: ACPI, APEI, Generic Hardware Error Source POLL/IRQ/NMI notification
type support
Generic Hardware Error Source provides a way to report platform
hardware errors (such as that from chipset). It works in so called
"Firmware First" mode, that is, hardware errors are reported to
firmware firstly, then reported to Linux by firmware. This way, some
non-standard hardware error registers or non-standard hardware link
can be checked by firmware to produce more valuable hardware error
information for Linux.
This patch adds POLL/IRQ/NMI notification types support.
Because the memory area used to transfer hardware error information
from BIOS to Linux can be determined only in NMI, IRQ or timer
handler, but general ioremap can not be used in atomic context, so a
special version of atomic ioremap is implemented for that.
Known issue:
- Error information can not be printed for recoverable errors notified
via NMI, because printk is not NMI-safe. Will fix this via delay
printing to IRQ context via irq_work or make printk NMI-safe.
v2:
- adjust printk format per comments.
Signed-off-by: Huang Ying <ying.huang@intel.com>
Reviewed-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
---
arch/x86/kernel/dumpstack.c | 1 +
1 file changed, 1 insertion(+)
(limited to 'arch/x86/kernel/dumpstack.c')
diff --git a/arch/x86/kernel/dumpstack.c b/arch/x86/kernel/dumpstack.c
index 6e8752c1bd52..d34cf80ec402 100644
--- a/arch/x86/kernel/dumpstack.c
+++ b/arch/x86/kernel/dumpstack.c
@@ -240,6 +240,7 @@ unsigned __kprobes long oops_begin(void)
bust_spinlocks(1);
return flags;
}
+EXPORT_SYMBOL_GPL(oops_begin);
void __kprobes oops_end(unsigned long flags, struct pt_regs *regs, int signr)
{
--
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