Messages in this thread Patch in this message | | | From | James Bottomley <> | Subject | [PATCH 02/14] [VOYAGER] x86/mca: make mca_nmi_hook external | Date | Tue, 14 Apr 2009 10:51:28 -0500 |
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Part of the apic rework brought the mca_nmi_hook to a place where it can't be accessed by architecture specific code. Publish it again, this time as a settable function vector so that voyager can use it.
If there were more than one possible architecture wanting to use this, it could become a call chain, but there's only one and MCA is an old bus, so leave it as a single call hook.
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com> --- arch/x86/include/asm/mca.h | 3 +++ arch/x86/kernel/mca_32.c | 12 ++++++++++++ 2 files changed, 15 insertions(+), 0 deletions(-)
diff --git a/arch/x86/include/asm/mca.h b/arch/x86/include/asm/mca.h index eedbb6c..785a2a4 100644 --- a/arch/x86/include/asm/mca.h +++ b/arch/x86/include/asm/mca.h @@ -4,6 +4,9 @@ #ifndef _ASM_X86_MCA_H #define _ASM_X86_MCA_H +/* hook for the bus chain of the MCA NMI */ +extern void (*mca_nmi_hook)(void); + /* Maximal number of MCA slots - actually, some machines have less, but * they all have sufficient number of POS registers to cover 8. */ diff --git a/arch/x86/kernel/mca_32.c b/arch/x86/kernel/mca_32.c index 845d80c..4bb3cc9 100644 --- a/arch/x86/kernel/mca_32.c +++ b/arch/x86/kernel/mca_32.c @@ -466,6 +466,13 @@ static int __kprobes mca_handle_nmi_callback(struct device *dev, void *data) return 0; } +/* + * The MCA (Microchannel Architecture) has an NMI chain for NMI sources + * along the MCA bus. Use this to hook into that chain if you will need + * it. + */ +void (*mca_nmi_hook)(void) = NULL; + void __kprobes mca_handle_nmi(void) { /* @@ -473,4 +480,9 @@ void __kprobes mca_handle_nmi(void) * adapter was responsible for the error. */ bus_for_each_dev(&mca_bus_type, NULL, NULL, mca_handle_nmi_callback); + + if (mca_nmi_hook) + mca_nmi_hook(); + else + pr_warning("NMI generated from unknown source!\n"); } -- 1.6.2.1
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