AuxXxilium/linux_dsm_epyc7002
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linux_dsm_epyc7002/arch/arm/mm
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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 ARM: entry: data abort: tail-call the main data abort handler 2011-07-02 10:56:11 +01:00
abort-ev4t.S ARM: entry: data abort: tail-call the main data abort handler 2011-07-02 10:56:11 +01:00
abort-ev5t.S ARM: entry: data abort: tail-call the main data abort handler 2011-07-02 10:56:11 +01:00
abort-ev5tj.S ARM: entry: data abort: tail-call the main data abort handler 2011-07-02 10:56:11 +01:00
abort-ev6.S ARM: asm: Add ARM_BE8() assembly helper 2013-10-19 20:46:33 +01:00
abort-ev7.S ARM: entry: data abort: tail-call the main data abort handler 2011-07-02 10:56:11 +01:00
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 ARM: entry: data abort: tail-call the main data abort handler 2011-07-02 10:56:11 +01:00
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 ARM: entry: prefetch abort: tail-call the main prefetch abort handler 2011-07-02 10:56:10 +01:00
pabort-v6.S ARM: entry: prefetch abort: tail-call the main prefetch abort handler 2011-07-02 10:56:10 +01:00
pabort-v7.S ARM: entry: prefetch abort: tail-call the main prefetch abort handler 2011-07-02 10:56:10 +01:00
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