linux/arch/powerpc
Benjamin Herrenschmidt b970b41ea6 powerpc/64/kexec: Copy image with MMU off when possible
Currently we turn the MMU off after copying the image, and we make
sure there is no overlap between the hash table and the target pages
in that case.

That doesn't work for Radix however. In that case, the page tables
are scattered and we can't really enforce that the target of the
image isn't overlapping one of them.

So instead, let's turn the MMU off before copying the image in radix
mode. Thankfully, in radix mode, even under a hypervisor, we know we
don't have the same kind of RMA limitations that hash mode has.

While at it, also turn the MMU off early when using hash in non-LPAR
mode, that way we can get rid of the collision check completely.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Acked-by: Balbir Singh <bsingharora@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-09-23 07:54:18 +10:00
..
boot powerpc/boot: Use $(Q) to quiet build rules not @ 2016-09-13 17:37:05 +10:00
configs powerpc updates for 4.8 # 1 2016-07-30 21:01:36 -07:00
crypto crypto: crc32c-vpmsum - Convert to CPU feature based module autoloading 2016-08-09 14:50:17 +10:00
include powerpc/mm: Add radix flush all with IS=3 2016-09-23 07:54:18 +10:00
kernel powerpc/64/kexec: Copy image with MMU off when possible 2016-09-23 07:54:18 +10:00
kvm powerpc: move hmi.c to arch/powerpc/kvm/ 2016-08-22 11:09:33 +10:00
lib powerpc/Makefile: Drop CONFIG_WORD_SIZE for BITS 2016-09-13 17:37:06 +10:00
math-emu
mm powerpc/mm: Add radix flush all with IS=3 2016-09-23 07:54:18 +10:00
net powerpc/ebpf/jit: Implement JIT compiler for extended BPF 2016-06-24 15:17:57 +10:00
oprofile powerpc/sparse: Make a bunch of things static 2016-09-13 17:35:47 +10:00
perf powerpc/sparse: Make a bunch of things static 2016-09-13 17:35:47 +10:00
platforms powerpc: Remove all usages of NO_IRQ 2016-09-20 20:57:12 +10:00
scripts powerpc/ftrace: Add Kconfig & Make glue for mprofile-kernel 2016-03-07 14:53:56 +11:00
sysdev powerpc: Remove all usages of NO_IRQ 2016-09-20 20:57:12 +10:00
xmon powerpc/xmon: Don't use ld on 32-bit 2016-09-13 17:37:02 +10:00
Kconfig powerpc/mm: Update FORCE_MAX_ZONEORDER range to allow hugetlb w/4K 2016-09-20 14:40:41 +10:00
Kconfig.debug powerpc/mm: Catch usage of cpu/mmu_has_feature() before jump label init 2016-08-01 11:15:06 +10:00
Makefile powerpc/Makefile: Construct the UTS_MACHINE value more concisely 2016-09-13 17:37:06 +10:00
relocs_check.sh powerpc: Convert relocs_check to a shell script using grep 2015-03-23 14:47:39 +11:00