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authorLinus Torvalds <torvalds@linux-foundation.org>2013-05-09 14:34:58 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2013-05-09 14:34:58 -0700
commitb32729b1eeae7ef8f5709923b36b5a0906d213df (patch)
tree20bb9092d2c67569ea4efd95c0df5b8160b8b1a3 /arch/tile/Kconfig
parent091d0d55b286c9340201b4ed4470be87fc568228 (diff)
parentabab8761d095e0805879df48a8ba6ea7f8b31c5e (diff)
Merge branch 'stable' of git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile
Pull tile update from Chris Metcalf: "The interesting bug fix is support for the upcoming "4.2" release of the Tilera hypervisor, which by default launches Linux at privilege level 2 instead of 1. The fix lets new and old hypervisors and Linuxes interoperate more smoothly, so I've tagged it for stable@kernel.org so that older Linuxes will be able to boot under the newer hypervisor." * 'stable' of git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile: usb: tilegx: fix memleak when create hcd fail arch/tile: remove inline marking of EXPORT_SYMBOL functions rtc: rtc-tile: add missing platform_device_unregister() when module exit tile: support new Tilera hypervisor
Diffstat (limited to 'arch/tile/Kconfig')
-rw-r--r--arch/tile/Kconfig14
1 files changed, 10 insertions, 4 deletions
diff --git a/arch/tile/Kconfig b/arch/tile/Kconfig
index 5b6a40dd555..3aa37669ff8 100644
--- a/arch/tile/Kconfig
+++ b/arch/tile/Kconfig
@@ -355,11 +355,17 @@ config HARDWALL
config KERNEL_PL
int "Processor protection level for kernel"
range 1 2
- default "1"
+ default 2 if TILEGX
+ default 1 if !TILEGX
---help---
- This setting determines the processor protection level the
- kernel will be built to run at. Generally you should use
- the default value here.
+ Since MDE 4.2, the Tilera hypervisor runs the kernel
+ at PL2 by default. If running under an older hypervisor,
+ or as a KVM guest, you must run at PL1. (The current
+ hypervisor may also be recompiled with "make HV_PL=2" to
+ allow it to run a kernel at PL1, but clients running at PL1
+ are not expected to be supported indefinitely.)
+
+ If you're not sure, don't change the default.
source "arch/tile/gxio/Kconfig"