[coreboot-gerrit] Patch merged into coreboot/master: lenovo/x60: CST table: use MWAIT requests instead of P_LVLx I/O reads

[gerrit at coreboot.org]

the following patch was just integrated into master:
commit e1f0ac4baa1bbe561276bee8ebc20fe86b0f8cc2
Author: Arthur Heymans <arthur at aheymans.xyz>
Date:   Thu May 19 16:02:38 2016 +0200

    lenovo/x60: CST table: use MWAIT requests instead of P_LVLx I/O reads
    
    Requesting low power acpi cpu c-states has two software interfaces:
    Using P_LVLx I/O reads or using equivalent MWAIT requests.
    This change makes it more consistent with newer targets that use MWAIT
    requests.
    
    There also exists extended intel acpi c-states which can be enabled
    in two ways:
    - using a substate hint to the mwait request (defined in bios);
    - setting a model specific register (msr)
    
    Currently this is done by setting the right msr bits but with this
    change one can experiment by adding substate hints.
    
    Change-Id: I9eeb5b008e2ddc2193725667f2c13582a4877e3c
    Signed-off-by: Arthur Heymans <arthur at aheymans.xyz>
    Reviewed-on: https://review.coreboot.org/14801
    Tested-by: build bot (Jenkins)
    Reviewed-by: Martin Roth <martinroth at google.com>
    Reviewed-by: Paul Menzel <paulepanter at users.sourceforge.net>


See https://review.coreboot.org/14801 for details.

-gerrit