Jason Gunthorpe 0f054e3cea ARM: 7949/1: feroceon: Log a FW_BUG if the L2 cache is turned on at boot ...

Booting on feroceon CPUS requires the L2 cache to be turned off. With
some kernel configurations (notably CONFIG_ARM_PATCH_PHYS_VIRT
disabled) the kernel will boot even if the L2 is turned on.

However there may be subtle breakage, and when PATCH_PHYS_VIRT is
enabled it is very likely that booting with L2 will crash at early
boot before any kernel diagnostic output.

The diagnostic message is intended to discourage people from shipping
bootloaders that leave the L2 turned on.

The issue on feroceon is that the L2 is bypassed when the L1 caches
are disabled. So the decompressor will place parts of the kernel image
into the L2 and the early cache-off boot code in head.S will write to
parts of the kernel image, bypassing the L2 and creating inconsistency.

Tested on ARM Kirkwood.

Signed-off-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Acked-by: Jason Cooper <jason@lakedaemon.net>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

2014-02-10 11:48:08 +00:00

..

abort-ev4.S

…

abort-ev4t.S

…

abort-ev5t.S

…

abort-ev5tj.S

…

abort-ev6.S

ARM: asm: Add ARM_BE8() assembly helper

2013-10-19 20:46:33 +01:00

abort-ev7.S

…

abort-lv4t.S

ARM: entry: data abort: ensure r5 is preserved by abort functions

2011-07-02 10:56:12 +01:00

abort-macro.S

ARM: 7088/1: entry: fix wrong parameter name used in do_thumb_abort

2011-09-10 23:39:56 +01:00

abort-nommu.S

…

alignment.c

ARM: alignment: correctly decode instructions in BE8 mode.

2013-10-19 20:46:34 +01:00

cache-aurora-l2.h

ARM: 7547/4: cache-l2x0: add support for Aurora L2 cache ctrl

2012-11-06 19:47:35 +00:00

cache-fa.S

ARM: mm: implement LoUIS API for cache maintenance ops

2012-09-25 11:20:25 +01:00

cache-feroceon-l2.c

ARM: 7949/1: feroceon: Log a FW_BUG if the L2 cache is turned on at boot

2014-02-10 11:48:08 +00:00

cache-l2x0.c

ARM: 7922/1: l2x0: add Marvell Tauros3 support

2013-12-29 12:32:47 +00:00

cache-nop.S

ARM: Add base support for ARMv7-M

2013-04-17 21:38:10 +02:00

cache-tauros2.c

ARM: cache: add dt support for tauros2 cache

2012-08-16 16:16:50 +08:00

cache-tauros3.h

ARM: 7922/1: l2x0: add Marvell Tauros3 support

2013-12-29 12:32:47 +00:00

cache-v4.S

ARM: mm: remove broken condition check for v4 flushing

2013-03-26 09:55:34 +00:00

cache-v4wb.S

ARM: mm: implement LoUIS API for cache maintenance ops

2012-09-25 11:20:25 +01:00

cache-v4wt.S

ARM: mm: implement LoUIS API for cache maintenance ops

2012-09-25 11:20:25 +01:00

cache-v6.S

ARM: mm: implement LoUIS API for cache maintenance ops

2012-09-25 11:20:25 +01:00

cache-v7.S

ARM: 7919/1: mm: refactor v7 cache cleaning ops to use way/index sequence

2013-12-29 12:32:40 +00:00

cache-xsc3l2.c

ARM: move CP15 definitions to separate header file

2012-03-28 18:30:01 +01:00

context.c

ARM: 7926/1: mm: flesh out and fix the comments in the ASID allocator

2013-12-29 12:46:49 +00:00

copypage-fa.c

arm: remove the second argument of k[un]map_atomic()

2012-03-20 21:48:14 +08:00

copypage-feroceon.c

arm: remove the second argument of k[un]map_atomic()

2012-03-20 21:48:14 +08:00

copypage-v4mc.c

Merge branch 'for-linus' of git://git.linaro.org/people/rmk/linux-arm

2012-03-29 16:53:48 -07:00

copypage-v4wb.c

arm: remove the second argument of k[un]map_atomic()

2012-03-20 21:48:14 +08:00

copypage-v4wt.c

arm: remove the second argument of k[un]map_atomic()

2012-03-20 21:48:14 +08:00

copypage-v6.c

Merge branch 'for-linus' of git://git.linaro.org/people/rmk/linux-arm

2012-03-29 16:53:48 -07:00

copypage-xsc3.c

arm: remove the second argument of k[un]map_atomic()

2012-03-20 21:48:14 +08:00

copypage-xscale.c

Merge branch 'for-linus' of git://git.linaro.org/people/rmk/linux-arm

2012-03-29 16:53:48 -07:00

dma-mapping.c

Merge branches 'amba', 'fixes', 'kees', 'misc' and 'unstable/sa11x0' into for-next

2014-01-21 21:26:33 +00:00

dump.c

ARM: add support to dump the kernel page tables

2013-12-11 09:53:13 +00:00

extable.c

ARM: 7876/1: clear Thumb-2 IT state on exception handling

2013-11-07 00:15:49 +00:00

fault-armv.c

mm: rename USE_SPLIT_PTLOCKS to USE_SPLIT_PTE_PTLOCKS

2013-11-15 09:32:14 +09:00

fault.c

arch: mm: pass userspace fault flag to generic fault handler

2013-09-12 15:38:01 -07:00

fault.h

ARM: LPAE: Add fault handling support

2011-12-08 10:30:40 +00:00

flush.c

ARM: 7923/1: mm: fix dcache flush logic for compound high pages

2013-12-29 12:46:08 +00:00

fsr-2level.c

ARM: LPAE: Move the FSR definitions to separate files

2011-12-08 10:30:37 +00:00

fsr-3level.c

ARM: mm: Transparent huge page support for LPAE systems.

2013-06-04 16:52:38 +01:00

highmem.c

Merge branch 'for-linus' of git://git.linaro.org/people/rmk/linux-arm

2012-03-29 16:53:48 -07:00

hugetlbpage.c

mm: migrate: check movability of hugepage in unmap_and_move_huge_page()

2013-09-11 15:57:49 -07:00

idmap.c

ARM: mm: Move the idmap print to appropriate place in the code

2013-10-10 20:25:06 -04:00

init.c

Merge branches 'fixes' and 'misc' into for-linus

2014-01-28 21:38:48 +00:00

iomap.c

arm/PCI: remove arch pci_flags definition

2012-02-23 20:18:56 -07:00

ioremap.c

ARM: add permission annotations to MT_MEMORY* mapping types

2013-12-11 09:53:14 +00:00

Kconfig

ARM: fix ARCH_IXP4xx usage of ARCH_SUPPORTS_BIG_ENDIAN

2013-10-19 20:46:32 +01:00

Makefile

ARM: add support to dump the kernel page tables

2013-12-11 09:53:13 +00:00

mm.h

ARM: DMA-API: better handing of DMA masks for coherent allocations

2013-10-31 14:49:21 +00:00

mmap.c

ARM: fix booting low-vectors machines

2013-11-30 14:45:31 +00:00

mmu.c

ARM: fix executability of CMA mappings

2013-12-11 09:53:22 +00:00

nommu.c

ARM: Fix nommu.c build warning

2013-11-14 10:59:50 +00:00

pabort-legacy.S

…

pabort-v6.S

…

pabort-v7.S

…

pgd.c

ARM: pgd allocation: retry on failure

2013-12-29 12:36:20 +00:00

proc-arm7tdmi.S

arm: delete __cpuinit/__CPUINIT usage from all ARM users

2013-07-14 19:36:52 -04:00

proc-arm9tdmi.S

arm: delete __cpuinit/__CPUINIT usage from all ARM users

2013-07-14 19:36:52 -04:00

proc-arm720.S

arm: delete __cpuinit/__CPUINIT usage from all ARM users

2013-07-14 19:36:52 -04:00

proc-arm740.S

arm: delete __cpuinit/__CPUINIT usage from all ARM users

2013-07-14 19:36:52 -04:00

proc-arm920.S

arm: delete __cpuinit/__CPUINIT usage from all ARM users

2013-07-14 19:36:52 -04:00

proc-arm922.S

arm: delete __cpuinit/__CPUINIT usage from all ARM users

2013-07-14 19:36:52 -04:00

proc-arm925.S

arm: delete __cpuinit/__CPUINIT usage from all ARM users

2013-07-14 19:36:52 -04:00

proc-arm926.S

arm: delete __cpuinit/__CPUINIT usage from all ARM users

2013-07-14 19:36:52 -04:00

proc-arm940.S

arm: delete __cpuinit/__CPUINIT usage from all ARM users

2013-07-14 19:36:52 -04:00

proc-arm946.S

arm: delete __cpuinit/__CPUINIT usage from all ARM users

2013-07-14 19:36:52 -04:00

proc-arm1020.S

arm: delete __cpuinit/__CPUINIT usage from all ARM users

2013-07-14 19:36:52 -04:00

proc-arm1020e.S

arm: delete __cpuinit/__CPUINIT usage from all ARM users

2013-07-14 19:36:52 -04:00

proc-arm1022.S

arm: delete __cpuinit/__CPUINIT usage from all ARM users

2013-07-14 19:36:52 -04:00

proc-arm1026.S

arm: delete __cpuinit/__CPUINIT usage from all ARM users

2013-07-14 19:36:52 -04:00

proc-fa526.S

arm: delete __cpuinit/__CPUINIT usage from all ARM users

2013-07-14 19:36:52 -04:00

proc-feroceon.S

ARM: 7818/1: feroceon: Add suspend/resume operation

2013-08-20 00:12:52 +01:00

proc-macros.S

ARM: 7773/1: PJ4B: Add support for errata 4742

2013-06-24 14:28:46 +01:00

proc-mohawk.S

arm: delete __cpuinit/__CPUINIT usage from all ARM users

2013-07-14 19:36:52 -04:00

proc-sa110.S

arm: delete __cpuinit/__CPUINIT usage from all ARM users

2013-07-14 19:36:52 -04:00

proc-sa1100.S

arm: delete __cpuinit/__CPUINIT usage from all ARM users

2013-07-14 19:36:52 -04:00

proc-syms.c

ARM: modules: don't export cpu_set_pte_ext when !MMU

2013-03-26 09:55:34 +00:00

proc-v6.S

ARM: asm: Add ARM_BE8() assembly helper

2013-10-19 20:46:33 +01:00

proc-v7-2level.S

ARM: 7784/1: mm: ensure SMP alternates assemble to exactly 4 bytes with Thumb-2

2013-07-22 14:29:09 +01:00

proc-v7-3level.S

ARM: 7784/1: mm: ensure SMP alternates assemble to exactly 4 bytes with Thumb-2

2013-07-22 14:29:09 +01:00

proc-v7.S

ARM: 7940/1: add support for the Cortex-A12 processor

2014-02-10 11:48:00 +00:00

proc-v7m.S

ARM: ARMv7-M: implement read_cpuid_ext

2013-05-17 11:44:40 +02:00

proc-xsc3.S

arm: delete __cpuinit/__CPUINIT usage from all ARM users

2013-07-14 19:36:52 -04:00

proc-xscale.S

arm: delete __cpuinit/__CPUINIT usage from all ARM users

2013-07-14 19:36:52 -04:00

tcm.h

ARM: 7694/1: ARM, TCM: initialize TCM in paging_init(), instead of setup_arch()

2013-04-17 16:53:24 +01:00

tlb-fa.S

Merge branch 'devel-stable' into for-next

2011-07-22 23:09:07 +01:00

tlb-v4.S

ARM: mm: tlb-v4: Use the new processor struct macros

2011-07-07 15:31:12 +01:00

tlb-v4wb.S

ARM: mm: tlb-v4wb: Use the new processor struct macros

2011-07-07 15:31:12 +01:00

tlb-v4wbi.S

ARM: mm: tlb-v4wbi: Use the new processor struct macros

2011-07-07 15:31:12 +01:00

tlb-v6.S

Merge branch 'devel-stable' into for-next

2011-07-22 23:09:07 +01:00

tlb-v7.S

ARM: mm: use inner-shareable barriers for TLB and user cache operations

2013-08-12 12:25:45 +01:00