[PATCH 1/2] [Maverick] UBUNTU: [Config] Enable CONFIG_INTR_REMAP=y

[Tim Gardner]

On 06/22/2010 06:54 PM, Leann Ogasawara wrote:
> Interrupt-remapping is part of the Intel Virtualization Technology for
> Directed I/O architecture.  The specification can be found from:
>
> http://download.intel.com/technology/computing/vptech/Intel(r)_VT_for_Direct_IO.pdf
>
> It's been requested (I've CC'd Yinying) that we enable the
> CONFIG_INTR_REMAP option in Maverick.  Even though it's noted as
> EXPERIMENTAL in the Kconfig, testing from Intel has shown it to be
> stable.
>
> BugLink: http://bugs.launchpad.net/bugs/597091
>
> config INTR_REMAP
>          bool "Support for Interrupt Remapping (EXPERIMENTAL)"
>          depends on X86_64&&  X86_IO_APIC&&  PCI_MSI&&  ACPI&&  EXPERIMENTAL
>          ---help---
>            Supports Interrupt remapping for IO-APIC and MSI devices.
>            To use x2apic mode in the CPU's which support x2APIC enhancements or
>            to support platforms with CPU's having>  8 bit APIC ID, say Y.
>
> =====
>

Well, this complicates things. Better keep "nointremap" in your bag of 
tricks when debugging why Intel server devices don't work.

rtg
-- 
Tim Gardner tim.gardner at canonical.com