On Fri, Apr 5, 2013 at 6:25 PM, Neil Horman <nhor...@tuxdriver.com> wrote:
> I'm sorry. Forgot to change the wording of the error for the new model that
> I'm following here. Although the message is mostly right as bios is
> responsible for setting and clearing the IRQ remapping feature bit in the
> chips capabilities register.
>
> I'll fix and repost Monday
>>> diff --git a/drivers/iommu/irq_remapping.c b/drivers/iommu/irq_remapping.c
>>> index d56f8c1..2b56e92 100644
>>> --- a/drivers/iommu/irq_remapping.c
>>> +++ b/drivers/iommu/irq_remapping.c
>>> @@ -19,6 +19,7 @@
>>> int irq_remapping_enabled;
>>>
>>> int disable_irq_remap;
>>> +int irq_remap_broken;
>>> int disable_sourceid_checking;
>>> int no_x2apic_optout;
>>>
>>> @@ -216,6 +217,17 @@ int irq_remapping_supported(void)
>>> if (disable_irq_remap)
>>> return 0;
>>>
>>> + if (irq_remap_broken) {
>>> + WARN_TAINT(1, TAIN_FIRMWARE_WORKAROUND,
>>> + "This system BIOS has enabled interrupt
>>> remapping\n"
>>> + "on a chipset that contains an erratum making
>>> that\n"
>>> + "feature unstable. Please reboot with
>>> nointremap\n"
>>> + "added to the kernel command line and contact\n"
>>> + "your BIOS vendor for an update");
Also please put those warning code in to
drivers/iommu/intel_irq_remapping.c::intel_irq_remapping_supported()
It does not belong to drivers/iommu/irq_remapping.c.
Thanks
Yinghai
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