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| author | Don Zickus <dzickus@redhat.com> | 2011-01-06 16:18:50 -0500 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2011-01-07 15:08:53 +0100 |
| commit | c410b8307702c1e1f35be3fd868ad18e4ba0410f (patch) | |
| tree | f81443153309c5d144ec1d163c089cc912c3e201 /arch/x86/kernel/traps.c | |
| parent | 166d751479c6d4e5b17dfc1f204a9c4397c9b3f1 (diff) | |
| download | linux-c410b8307702c1e1f35be3fd868ad18e4ba0410f.tar.bz2 | |
x86, NMI: Remove DIE_NMI_IPI
With priorities in place and no one really understanding the difference between
DIE_NMI and DIE_NMI_IPI, just remove DIE_NMI_IPI and convert everyone to DIE_NMI.
This also simplifies default_do_nmi() a little bit. Instead of calling the
die_notifier in both the if and else part, just pull it out and call it before
the if-statement. This has the side benefit of avoiding a call to the ioport
to see if there is an external NMI sitting around until after the (more frequent)
internal NMIs are dealt with.
Patch-Inspired-by: Huang Ying <ying.huang@intel.com>
Signed-off-by: Don Zickus <dzickus@redhat.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <1294348732-15030-5-git-send-email-dzickus@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/kernel/traps.c')
| -rw-r--r-- | arch/x86/kernel/traps.c | 19 |
1 files changed, 8 insertions, 11 deletions
diff --git a/arch/x86/kernel/traps.c b/arch/x86/kernel/traps.c index c7fd1cea0374..23f6ac05d04c 100644 --- a/arch/x86/kernel/traps.c +++ b/arch/x86/kernel/traps.c @@ -394,6 +394,14 @@ static notrace __kprobes void default_do_nmi(struct pt_regs *regs) unsigned char reason = 0; int cpu; + /* + * CPU-specific NMI must be processed before non-CPU-specific + * NMI, otherwise we may lose it, because the CPU-specific + * NMI can not be detected/processed on other CPUs. + */ + if (notify_die(DIE_NMI, "nmi", regs, 0, 2, SIGINT) == NOTIFY_STOP) + return; + cpu = smp_processor_id(); /* Only the BSP gets external NMIs from the system. */ @@ -401,21 +409,10 @@ static notrace __kprobes void default_do_nmi(struct pt_regs *regs) reason = get_nmi_reason(); if (!(reason & NMI_REASON_MASK)) { - if (notify_die(DIE_NMI_IPI, "nmi_ipi", regs, reason, 2, SIGINT) - == NOTIFY_STOP) - return; - -#ifdef CONFIG_X86_LOCAL_APIC - if (notify_die(DIE_NMI, "nmi", regs, reason, 2, SIGINT) - == NOTIFY_STOP) - return; -#endif unknown_nmi_error(reason, regs); return; } - if (notify_die(DIE_NMI, "nmi", regs, reason, 2, SIGINT) == NOTIFY_STOP) - return; /* AK: following checks seem to be broken on modern chipsets. FIXME */ if (reason & NMI_REASON_SERR) |