tree e89cae013bbe646d181f77463f3ad519962b4f5e
parent a10aa331aa02e0140e81b31a97b258dae764efcc
author Max Filippov <jcmvbkbc@gmail.com> 1542181602 -0800
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1542788759 +0100

xtensa: fix boot parameters address translation

commit 40dc948f234b73497c3278875eb08a01d5854d3f upstream.

The bootloader may pass physical address of the boot parameters structure
to the MMUv3 kernel in the register a2. Code in the _SetupMMU block in
the arch/xtensa/kernel/head.S is supposed to map that physical address to
the virtual address in the configured virtual memory layout.

This code haven't been updated when additional 256+256 and 512+512
memory layouts were introduced and it may produce wrong addresses when
used with these layouts.

Cc: stable@vger.kernel.org
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>