tree 4b622ca0f406f46a50d2f02b7f71e3cef1de0855
parent 24f2970fd32134ff8eb3387a54a1ef7ccac3f28f
author James Hogan <james.hogan@imgtec.com> 1430143636 +0100
committer Ralf Baechle <ralf@linux-mips.org> 1434916434 +0200

MIPS: Fix KVM guest fixmap address

KVM guest kernels for trap & emulate run in user mode, with a modified
set of kernel memory segments. However the fixmap address is still in
the normal KSeg3 region at 0xfffe0000 regardless, causing problems when
cache alias handling makes use of them when handling copy on write.

Therefore define FIXADDR_TOP as 0x7ffe0000 in the guest kernel mapped
region when CONFIG_KVM_GUEST is defined.

Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: linux-mips@linux-mips.org
Cc: <stable@vger.kernel.org> # v3.10+
Patchwork: https://patchwork.linux-mips.org/patch/9887/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>