[PATCH] Fix kexec reboot on ARM
Russell King - ARM Linux
linux at arm.linux.org.uk
Wed Dec 14 03:08:02 EST 2011
On Wed, Dec 14, 2011 at 03:02:10PM +1100, Peter Chubb wrote:
>
> When kexec() runs, it eventually sets up a 1-to-1 memory map, then
> invokes cpu_reset(). When it invokes cpu_reset (which turns
> off the MMU), it does so at its virtual address. Across the code that
> disables the MMU, virtual and physical addresses have to be the same,
> otherwise after disabling the MMU, the PC is invalid.
>
> The simplest fix is to invoke cpu_reset() at its one-to-one mapped
> address.
>
> I've tested on KZM (arm v6) and Beagleboard (omap)
NAK.
Three reasons:
1. You've not signed-off the patch (please read
Documentation/SubmittingPatches)
2. pre-ARMv6 do not expect this, and it will break where
PHYS_OFFSET >= PAGE_OFFSET
3. Have you seen what's already queued for the next merge window?
More information about the kexec
mailing list