On Sun, Aug 05, 2012 at 04:10:34PM +0100, Cyril Chemparathy wrote: > On 8/4/2012 4:39 AM, Russell King - ARM Linux wrote: > > On Tue, Jul 31, 2012 at 07:04:36PM -0400, Cyril Chemparathy wrote: > >> This series is a follow on to the RFC series posted earlier (archived at > >> [1]). > >> The major change introduced here is the modification to the kernel patching > >> mechanism for phys_to_virt/virt_to_phys, in order to support LPAE platforms > >> that require late patching. In addition to these changes, we've updated > >> the > >> series based on feedback from the earlier posting. > >> > >> Most of the patches in this series are fixes and extensions to LPAE > >> support on > >> ARM. The last three patches in this series are specific to the TI Keystone > >> platform, and are being provided here for the sake of completeness. These > >> three patches are dependent on the smpops patch set (see [2]), and are not > >> ready to be merged in as yet. > > > > Can you explain why you want the kernel loaded above the 4GB watermark? > > This seems silly to me, as the kernel needs to run at points with a 1:1 > > physical to virtual mapping, and you can't do that if the kernel is > > stored in physical memory above the 4GB watermark. [...] > We are well aware of the fact that we are barely scratching the surface > of the problem space here, and we'd be very thankful for a heads up on > issues that we may have missed so far.
Another thing to be aware is that apart from a virtual alias between the kernel mapping and the idmap, you now introduce a physical alias as well and the caches (physically tagged) get confused. -- Catalin -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
