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Shawn Anastasio b4fc36e60f powerpc/dma: Fix invalid DMA mmap behavior 
The refactor of powerpc DMA functions in commit 6666cc17d780
("powerpc/dma: remove dma_nommu_mmap_coherent") incorrectly
changes the way DMA mappings are handled on powerpc.
Since this change, all mapped pages are marked as cache-inhibited
through the default implementation of arch_dma_mmap_pgprot.
This differs from the previous behavior of only marking pages
in noncoherent mappings as cache-inhibited and has resulted in
sporadic system crashes in certain hardware configurations and
workloads (see Bugzilla).

This commit restores the previous correct behavior by providing
an implementation of arch_dma_mmap_pgprot that only marks
pages in noncoherent mappings as cache-inhibited. As this behavior
should be universal for all powerpc platforms a new file,
dma-generic.c, was created to store it.

Fixes: 6666cc17d780 ("powerpc/dma: remove dma_nommu_mmap_coherent")
# NOTE: fixes commit 6666cc17d780 released in v5.1.
# Consider a stable tag:
# Cc: stable@vger.kernel.org # v5.1+
# NOTE: fixes commit 6666cc17d780 released in v5.1.
# Consider a stable tag:
# Cc: stable@vger.kernel.org # v5.1+
Cc: stable@vger.kernel.org # v5.1+
Signed-off-by: Shawn Anastasio <shawn@anastas.io>
Reviewed-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20190717235437.12908-1-shawn@anastas.io
2019-07-19 21:29:49 +10:00
..
syscalls
arch: wire-up pidfd_open()
2019-06-28 12:17:55 +02:00
trace
powerpc updates for 5.3
2019-07-13 16:08:36 -07:00
vdso32
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vdso64
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.gitignore
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align.c
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2019-05-30 11:26:32 -07:00
asm-offsets.c
powerpc updates for 5.3
2019-07-13 16:08:36 -07:00
audit.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
btext.c
powerpc: Rework btext_find_display to use of_stdout and device_type helpers
2018-11-26 22:33:37 +11:00
cacheinfo.c
powerpc updates for 5.3
2019-07-13 16:08:36 -07:00
cacheinfo.h
powerpc/cacheinfo: add cacheinfo_teardown, cacheinfo_rebuild
2019-06-15 16:52:06 +10:00
compat_audit.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
cpu_setup_6xx.S
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cpu_setup_44x.S
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cpu_setup_fsl_booke.S
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cpu_setup_pa6t.S
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cpu_setup_power.S
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cpu_setup_ppc970.S
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cputable.c
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crash_dump.c
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crash.c
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dawr.c
powerpc: Fix compile issue with force DAWR
2019-07-03 15:19:35 +10:00
dbell.c
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2019-05-30 11:26:32 -07:00
dma-common.c
powerpc/dma: Fix invalid DMA mmap behavior
2019-07-19 21:29:49 +10:00
dma-iommu.c
powerpc/pseries/dma: Allow SWIOTLB
2019-07-03 15:19:35 +10:00
dma-mask.c
dma-mapping, powerpc: simplify the arch dma_set_mask override
2019-02-18 22:41:03 +11:00
dma-swiotlb.c
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dt_cpu_ftrs.c
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early_32.c
powerpc/32: use memset() instead of memset_io() to zero BSS
2019-05-03 01:20:26 +10:00
eeh_cache.c
powerpc updates for 5.3
2019-07-13 16:08:36 -07:00
eeh_dev.c
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2019-05-30 11:26:35 -07:00
eeh_driver.c
powerpc/eeh: Improve recovery of passed-through devices
2019-02-05 11:55:44 +11:00
eeh_event.c
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eeh_pe.c
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eeh_sysfs.c
powerpc/eeh: Add include_passed to eeh_pe_state_clear()
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eeh.c
powerpc updates for 5.3
2019-07-13 16:08:36 -07:00
entry_32.S
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exceptions-64e.S
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exceptions-64s.S
powerpc/64s/exception: simplify hmi control flow
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fadump.c
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firmware.c
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fpu.S
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fsl_booke_entry_mapping.S
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
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head_8xx.S
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head_32.h
powerpc/32: implement fast entry for syscalls on non BOOKE
2019-05-03 01:20:27 +10:00
head_32.S
powerpc fixes for 5.2 #5
2019-06-22 09:09:42 -07:00
head_40x.S
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head_64.S
powerpc updates for 5.3
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head_booke.h
powerpc/32: fix build failure on book3e with KVM
2019-06-16 00:03:38 +10:00
head_fsl_booke.S
powerpc fixes for 5.2 #5
2019-06-22 09:09:42 -07:00
hw_breakpoint.c
powerpc updates for 5.3
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idle_6xx.S
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io.c
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iomap.c
powerpc: iomap.c: introduce io{read|write}64_{lo_hi|hi_lo}
2018-04-05 14:59:26 +10:00
iommu.c
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irq.c
powerpc updates for 5.3
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isa-bridge.c
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kexec_elf_64.c
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kgdb.c
powerpc: Activate CONFIG_THREAD_INFO_IN_TASK
2019-02-23 22:31:40 +11:00
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kprobes.c
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kvm_emul.S
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kvm.c
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l2cr_6xx.S
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legacy_serial.c
powerpc: Use of_node_name_eq for node name comparisons
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machine_kexec_32.c
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machine_kexec.c
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2019-06-19 17:09:06 +02:00
Makefile
powerpc/dma: Fix invalid DMA mmap behavior
2019-07-19 21:29:49 +10:00
mce_power.c
powerpc updates for 5.3
2019-07-13 16:08:36 -07:00
mce.c
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misc_32.S
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misc_64.S
powerpc updates for 5.3
2019-07-13 16:08:36 -07:00
misc.S
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module_32.c
powerpc updates for 5.3
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module_64.c
powerpc updates for 5.3
2019-07-13 16:08:36 -07:00
module.c
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module.lds
powerpc/modules: Fix alignment of .toc section in kernel modules
2017-12-11 13:03:35 +11:00
msi.c
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nvram_64.c
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of_platform.c
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paca.c
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pci_32.c
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pci_of_scan.c
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ppc_save_regs.S
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proc_powerpc.c
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process.c
powerpc updates for 5.3
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prom_init_check.sh
powerpc fixes for 5.2 #4
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prom_init.c
powerpc updates for 5.3
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prom_parse.c
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prom.c
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ptrace32.c
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ptrace.c
ptrace: move clearing of TIF_SYSCALL_EMU flag to core
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rtas-proc.c
powerpc updates for 4.18
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rtas-rtc.c
powerpc: use time64_t in read_persistent_clock
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rtas.c
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rtasd.c
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security.c
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setup_32.c
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setup.h
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signal_32.c
Merge branch 'siginfo-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace
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signal_64.c
Merge branch 'siginfo-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace
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signal.c
Remove 'type' argument from access_ok() function
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signal.h
powerpc/syscalls: signal_{32, 64} - switch to SYSCALL_DEFINE
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smp-tbsync.c
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smp.c
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stacktrace.c
powerpc: Remove export of save_stack_trace_tsk_reliable()
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suspend.c
PM: hibernate: powerpc: Expose pfn_is_nosave() prototype
2019-06-14 10:48:56 +02:00
swsusp_32.S
powerpc/32s: fix suspend/resume when IBATs 4-7 are used
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swsusp_booke.S
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swsusp.c
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sys_ppc32.c
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syscalls.c
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sysfs.c
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tau_6xx.c
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time.c
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tm.S
powerpc/tm: update comment about interrupt re-entrancy
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traps.c
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vdso.c
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vecemu.c
powerpc: Add a missing include header
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vector.S
powerpc/64: Don't trace code that runs with the soft irq mask unreconciled
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vmlinux.lds.S
powerpc/kconfig: define CONFIG_DATA_SHIFT and CONFIG_ETEXT_SHIFT
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watchdog.c
powerpc/watchdog: Use hrtimers for per-CPU heartbeat
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