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linux/arch/powerpc/kernel
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Alexey Kardashevskiy 437ef802e0 powerpc/dma: Fix dma_map_ops::get_required_mask 
There are 2 problems with it:
  1. "<" vs expected "<<"
  2. the shift number is an IOMMU page number mask, not an address
  mask as the IOMMU page shift is missing.

This did not hit us before f1565c24b5 ("powerpc: use the generic
dma_ops_bypass mode") because we had additional code to handle bypass
mask so this chunk (almost?) never executed.However there were
reports that aacraid does not work with "iommu=nobypass".

After f1565c24b5, aacraid (and probably others which call
dma_get_required_mask() before setting the mask) was unable to enable
64bit DMA and fall back to using IOMMU which was known not to work,
one of the problems is double free of an IOMMU page.

This fixes DMA for aacraid, both with and without "iommu=nobypass" in
the kernel command line. Verified with "stress-ng -d 4".

Fixes: 6a5c7be5e4 ("powerpc: Override dma_get_required_mask by platform hook and ops")
Cc: stable@vger.kernel.org # v3.2+
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200908015106.79661-1-aik@ozlabs.ru
2020-09-08 14:20:55 +10:00
..
ptrace powerpc/ptrace: Fix build error in pkey_get() 2020-08-07 18:27:26 -07:00
syscalls all arch: remove system call sys_sysctl 2020-08-14 19:56:56 -07:00
trace powerpc: Add a ppc_inst_as_str() helper 2020-07-23 17:41:36 +10:00
vdso32 Revert "powerpc/build: vdso linker warning for orphan sections" 2020-09-03 15:42:26 +10:00
vdso64 Revert "powerpc/build: vdso linker warning for orphan sections" 2020-09-03 15:42:26 +10:00
.gitignore
align.c powerpc: Use fallthrough pseudo-keyword 2020-07-29 21:09:37 +10:00
asm-offsets.c KVM: PPC: Book3S HV: Save/restore new PMU registers 2020-07-22 21:56:41 +10:00
audit.c
btext.c mm: reorder includes after introduction of linux/pgtable.h 2020-06-09 09:39:13 -07:00
cacheinfo.c powerpc/cacheinfo: Warn if cache object chain becomes unordered 2020-07-30 22:53:48 +10:00
cacheinfo.h
compat_audit.c
cpu_setup_6xx.S powerpc/32: Blacklist functions running with MMU disabled for kprobe 2020-06-02 20:59:11 +10:00
cpu_setup_44x.S
cpu_setup_fsl_booke.S
cpu_setup_pa6t.S
cpu_setup_power.S powerpc/perf: Initialize power10 PMU registers in cpu setup routine 2020-07-26 23:34:23 +10:00
cpu_setup_ppc970.S
cputable.c powerpc/kernel: Cleanup machine check function declarations 2020-08-17 14:13:18 +10:00
crash_dump.c powerpc: Add prefixed instructions to instruction data type 2020-05-19 00:10:39 +10:00
dawr.c powerpc/watchpoint: Guest support for 2nd DAWR hcall 2020-07-26 23:34:19 +10:00
dbell.c powerpc: Inline doorbell sending functions 2020-07-29 21:02:09 +10:00
dma-iommu.c powerpc/dma: Fix dma_map_ops::get_required_mask 2020-09-08 14:20:55 +10:00
dma-mask.c
dma-swiotlb.c
dt_cpu_ftrs.c Revert "powerpc/64s: Remove PROT_SAO support" 2020-08-24 14:12:53 +10:00
early_32.c
eeh_cache.c
eeh_driver.c pci-v5.9-changes 2020-08-07 18:48:15 -07:00
eeh_event.c
eeh_pe.c powerpc/eeh: Move PE tree setup into the platform 2020-07-26 23:34:21 +10:00
eeh_sysfs.c powerpc/eeh: Pass eeh_dev to eeh_ops->resume_notify() 2020-07-26 23:34:20 +10:00
eeh.c powerpc/eeh: Rename eeh_{add_to|remove_from}_parent_pe() 2020-07-26 23:34:21 +10:00
entry_32.S powerpc: Select ARCH_HAS_MEMBARRIER_SYNC_CORE 2020-07-23 17:43:23 +10:00
entry_64.S powerpc/64s: scv entry should set PPR 2020-08-27 17:41:13 +10:00
epapr_hcalls.S
epapr_paravirt.c powerpc: Use a datatype for instructions 2020-05-19 00:10:37 +10:00
exceptions-64e.S
exceptions-64s.S powerpc updates for 5.9 2020-08-07 10:33:50 -07:00
fadump.c powerpc/fadump: Fix build error with CONFIG_PRESERVE_FA_DUMP=y 2020-07-27 17:04:54 +10:00
firmware.c powerpc/pseries: Add KVM guest doorbell restrictions 2020-07-29 21:02:10 +10:00
fpu.S powerpc: re-initialise lazy FPU/VEC counters on every fault 2020-07-16 13:00:24 +10:00
fsl_booke_entry_mapping.S
head_8xx.S mm: reorder includes after introduction of linux/pgtable.h 2020-06-09 09:39:13 -07:00
head_32.h
head_32.S powerpc/32s: Remove TAUException wart in traps.c 2020-07-29 21:08:18 +10:00
head_40x.S powerpc/40x: Fix assembler warning about r0 2020-08-03 22:12:41 +10:00
head_44x.S mm: reorder includes after introduction of linux/pgtable.h 2020-06-09 09:39:13 -07:00
head_64.S powerpc/64: Don't initialise init_task->thread.regs 2020-05-15 11:58:54 +10:00
head_booke.h powerpc: Replace _ALIGN_UP() by ALIGN() 2020-05-11 23:15:15 +10:00
head_fsl_booke.S mm: reorder includes after introduction of linux/pgtable.h 2020-06-09 09:39:13 -07:00
hw_breakpoint.c powerpc/watchpoint: Remove 512 byte boundary 2020-07-26 23:34:19 +10:00
idle_6xx.S powerpc/32: Blacklist functions running with MMU disabled for kprobe 2020-06-02 20:59:11 +10:00
idle_book3e.S
idle_book3s.S
idle_e500.S powerpc/32: Blacklist functions running with MMU disabled for kprobe 2020-06-02 20:59:11 +10:00
idle.c
ima_arch.c powerpc/ima: Fix secure boot rules in ima arch policy 2020-05-07 17:25:54 +10:00
io-workarounds.c mm: reorder includes after introduction of linux/pgtable.h 2020-06-09 09:39:13 -07:00
io.c
iomap.c iomap: constify ioreadX() iomem argument (as in generic implementation) 2020-08-14 19:56:57 -07:00
iommu.c
irq.c powerpc/64s: Move HMI IRQ stat from percpu variable to paca. 2020-07-29 23:47:53 +10:00
isa-bridge.c powerpc: remove __ioremap_at and __iounmap_at 2020-06-02 10:59:10 -07:00
jump_label.c powerpc: Use a datatype for instructions 2020-05-19 00:10:37 +10:00
kgdb.c maccess: make get_kernel_nofault() check for minimal type compatibility 2020-06-18 12:10:37 -07:00
kprobes-ftrace.c
kprobes.c powerpc: Add a ppc_inst_as_str() helper 2020-07-23 17:41:36 +10:00
kvm_emul.S
kvm.c
l2cr_6xx.S powerpc/32: Blacklist functions running with MMU disabled for kprobe 2020-06-02 20:59:11 +10:00
legacy_serial.c
Makefile Kbuild updates for v5.9 2020-08-09 14:10:26 -07:00
mce_power.c powerpc/powernv: Machine check handler for POWER10 2020-07-23 17:43:30 +10:00
mce.c powerpc/64s: Move HMI IRQ stat from percpu variable to paca. 2020-07-29 23:47:53 +10:00
misc_32.S powerpc/32: Blacklist functions running with MMU disabled for kprobe 2020-06-02 20:59:11 +10:00
misc_64.S powerpc/book3s64/keys/kuap: Reset AMR/IAMR values on kexec 2020-07-20 22:57:59 +10:00
misc.S powerpc/32: Blacklist functions running with MMU disabled for kprobe 2020-06-02 20:59:11 +10:00
module_32.c powerpc: module_[32|64].c: replace swap function with built-in one 2020-05-11 23:15:14 +10:00
module_64.c maccess: rename probe_kernel_{read,write} to copy_{from,to}_kernel_nofault 2020-06-17 10:57:41 -07:00
module.c powerpc: Use MODULES_VADDR if defined 2020-07-27 00:01:30 +10:00
module.lds
msi.c
note.S
nvram_64.c powerpc updates for 5.8 2020-06-05 12:39:30 -07:00
of_platform.c powerpc/eeh: Remove eeh_dev_phb_init_dynamic() 2020-07-26 23:34:19 +10:00
optprobes_head.S powerpc: Add prefixed instructions to instruction data type 2020-05-19 00:10:39 +10:00
optprobes.c powerpc: Add ppc_inst_as_u64() 2020-05-26 23:36:57 +10:00
paca.c Merge branch 'fixes' into next 2020-07-18 22:43:55 +10:00
pci_32.c
pci_64.c powerpc updates for 5.8 2020-06-05 12:39:30 -07:00
pci_dn.c powerpc/eeh: Rename eeh_{add_to|remove_from}_parent_pe() 2020-07-26 23:34:21 +10:00
pci_of_scan.c
pci-common.c
pci-hotplug.c powerpc/eeh: Release EEH device state synchronously 2020-05-18 21:58:44 +10:00
pmc.c
ppc32.h
ppc_save_regs.S
proc_powerpc.c
process.c powerpc/64s: Fix crash in load_fp_state() due to fpexc_mode 2020-08-27 17:41:39 +10:00
prom_init_check.sh
prom_init.c powerpc: fix function annotations to avoid section mismatch warnings with gcc-10 2020-07-30 10:50:07 +10:00
prom_parse.c
prom.c powerpc/drmem: Make LMB walk a bit more flexible 2020-07-29 23:47:54 +10:00
reloc_32.S
reloc_64.S
rtas_flash.c
rtas_pci.c mm: reorder includes after introduction of linux/pgtable.h 2020-06-09 09:39:13 -07:00
rtas-proc.c
rtas-rtc.c
rtas.c powerpc/rtas: don't online CPUs for partition suspend 2020-07-16 13:12:35 +10:00
rtasd.c powerpc/rtasd: simplify handle_rtas_event(), emit message on events 2020-07-16 13:12:38 +10:00
secure_boot.c powerpc/pseries: Detect secure and trusted boot state of the system. 2020-07-16 14:49:53 +10:00
security.c powerpc/security: Allow for processors that flush the link stack using the special bcctr 2020-07-16 13:12:32 +10:00
secvar-ops.c
secvar-sysfs.c
setup_32.c mm: reorder includes after introduction of linux/pgtable.h 2020-06-09 09:39:13 -07:00
setup_64.c powerpc/64s: system call support for scv/rfscv instructions 2020-07-22 23:00:27 +10:00
setup-common.c powerpc: Fix P10 PVR revision in /proc/cpuinfo for SMT4 cores 2020-08-17 13:11:22 +10:00
setup.h
signal_32.c powerpc/signal_32: Simplify loop in PPC64 save_general_regs() 2020-07-15 12:04:40 +10:00
signal_64.c powerpc/signal64: Don't opencode page prefaulting 2020-07-15 12:04:40 +10:00
signal.c powerpc/64s: system call support for scv/rfscv instructions 2020-07-22 23:00:27 +10:00
signal.h
smp-tbsync.c
smp.c powerpc/book3s64/kuap: Move UAMOR setup to key init function 2020-07-20 22:57:59 +10:00
stacktrace.c kernel: rename show_stack_loglvl() => show_stack() 2020-06-09 09:39:13 -07:00
suspend.c
swsusp_32.S powerpc/32: Blacklist functions running with MMU disabled for kprobe 2020-06-02 20:59:11 +10:00
swsusp_64.c
swsusp_asm64.S
swsusp_booke.S
swsusp.c
sys_ppc32.c
syscall_64.c Merge branch 'scv' support into next 2020-07-23 17:43:44 +10:00
syscalls.c
sysfs.c powerpc/perf: Add support for ISA3.1 PMU SPRs 2020-07-22 21:56:41 +10:00
systbl_chk.sh
systbl.S
tau_6xx.c
time.c powerpc64: Break asm/percpu.h vs spinlock_types.h dependency 2020-07-10 12:00:01 +02:00
tm.S
traps.c powerpc/32s: Remove TAUException wart in traps.c 2020-07-29 21:08:18 +10:00
ucall.S
udbg_16550.c
udbg.c
uprobes.c powerpc: Add ppc_inst_next() 2020-05-26 23:36:51 +10:00
vdso.c powerpc/vdso: Fix vdso cpu truncation 2020-07-16 13:12:47 +10:00
vecemu.c powerpc: Define and use get_user_instr() et. al. 2020-05-19 00:10:37 +10:00
vector.S powerpc: re-initialise lazy FPU/VEC counters on every fault 2020-07-16 13:00:24 +10:00
vmlinux.lds.S powerpc updates for 5.8 2020-06-05 12:39:30 -07:00
watchdog.c