[coreboot-gerrit] Patch merged into coreboot/master: arm64: mmu: Prevent CPU prefetch instructions from device memory

[gerrit at coreboot.org]

the following patch was just integrated into master:
commit c159a0ec4a41a4243df60a1a94c1d4848f6492c5
Author: Jimmy Huang <jimmy.huang at mediatek.com>
Date:   Tue Sep 15 15:29:10 2015 +0800

    arm64: mmu: Prevent CPU prefetch instructions from device memory
    
    Set XN bit of block upper attribute to device memory in mmu. CPU may
    speculatively prefetch instructions from device memory, but the IO
    subsystem of some implementation may not support this operation. Set
    this attribute to device memory mmu entries can prevent CPU from
    prefetching device memory.
    
    BRANCH=none
    BUG=none
    TEST=build and booted to kernel on oak-rev3 with dcm enabled.
    
    Change-Id: I52ac7d7c84220624aaf6a48d64b9110d7afeb293
    Signed-off-by: Patrick Georgi <pgeorgi at chromium.org>
    Original-Commit-Id: 7b01a4157cb046a5e75ea7625060a602e7a63c3c
    Original-Change-Id: Id535e990a23b6c89123b5a4e64d7ed21eebed607
    Original-Signed-off-by: Jimmy Huang <jimmy.huang at mediatek.com>
    Original-Reviewed-on: https://chromium-review.googlesource.com/302301
    Original-Commit-Ready: Yidi Lin <yidi.lin at mediatek.com>
    Original-Tested-by: Yidi Lin <yidi.lin at mediatek.com>
    Original-Reviewed-by: Aaron Durbin <adurbin at chromium.org>
    Original-Reviewed-by: Julius Werner <jwerner at chromium.org>
    Reviewed-on: http://review.coreboot.org/11722
    Tested-by: build bot (Jenkins)
    Reviewed-by: Patrick Georgi <pgeorgi at google.com>


See http://review.coreboot.org/11722 for details.

-gerrit