Commit-ID: 15112f89efb79797c0d70ce6759e2438d66d4f59
Gitweb: http://git.kernel.org/tip/15112f89efb79797c0d70ce6759e2438d66d4f59
Author: Jaswinder Singh Rajput <jaswinder@xxxxxxxxxx>
AuthorDate: Sun, 1 Mar 2009 15:02:11 +0530
Commit: Ingo Molnar <mingo@xxxxxxx>
CommitDate: Sun, 1 Mar 2009 12:43:03 +0100
x86: Basic AMD Support for performance counters, disable IRQs
Ingo Molnar reported:
> The AMD perfcounter patches cause a crash - an Opteron system
> spontaneous reboots at this point during early bootup:
>
> CPU 0/0x4 -> Node 0
> tseg: 00cfe00000
> CPU: Physical Processor ID: 0
> CPU: Processor Core ID: 0
> using C1E aware idle routine
> AMD Performance Monitoring support detected.
> ... num counters: 4
> ... value mask: 0000000000000000
> ... fixed counters: 0
> ... counter mask: 000000000000000f
> ACPI: Core revision 20081204
> ftrace: converting mcount calls to 0f 1f 44 00 00
> ftrace: allocating 16365 entries in 129 pages
> Setting APIC routing to physical flat
> masked ExtINT on CPU#0
> ENABLING IO
> [reboot]
Disable the IRQ path for now.
Signed-off-by: Ingo Molnar <mingo@xxxxxxx>
---
arch/x86/kernel/cpu/perf_counter.c | 4 ++++
1 files changed, 4 insertions(+), 0 deletions(-)
diff --git a/arch/x86/kernel/cpu/perf_counter.c b/arch/x86/kernel/cpu/perf_counter.c
index 266618a..0e4119e 100644
--- a/arch/x86/kernel/cpu/perf_counter.c
+++ b/arch/x86/kernel/cpu/perf_counter.c
@@ -701,6 +701,10 @@ void perf_counters_lapic_init(int nmi)
{
u32 apic_val;
+ /* Currently interrupts are disabled for AMD: */
+ if (boot_cpu_data.x86_vendor == X86_VENDOR_AMD)
+ return;
+
if (!perf_counters_initialized)
return;
/*
--
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