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4e28784024
linux/arch/powerpc
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Thadeu Lima de Souza Cascardo 4e28784024 powernv/iommu: disable IOMMU bypass with param iommu=nobypass 
When IOMMU bypass is enabled, a PCI device can read and write memory
that was not mapped by the driver without causing an EEH. That might
cause memory corruption, for example.

When we disable bypass, DMA reads and writes to addresses not mapped by
the IOMMU will cause an EEH, allowing us to debug such issues.

Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@linux.vnet.ibm.com>
Reviewed-by: Gavin Shan <gwshan@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2015-01-23 14:02:46 +11:00
..
boot Merge remote-tracking branch 'scottwood/next' into next 2014-11-18 17:00:38 +11:00
configs powerpc/ps3: Enable CONFIG_PS3_REPOSITORY_WRITE in ps3_defconfig 2015-01-22 17:31:22 +11:00
crypto crypto: powerpc - replace memset by memzero_explicit 2014-12-02 22:55:50 +08:00
include cxl: Enable CAPP recovery 2015-01-22 17:31:52 +11:00
kernel powerpc/kvm: Create proper names for the kvm_host_state PMU fields 2014-12-29 15:45:55 +11:00
kvm powerpc/kvm: Create proper names for the kvm_host_state PMU fields 2014-12-29 15:45:55 +11:00
lib powerpc/lib: Do not include string.o in obj-y twice 2014-12-29 15:45:55 +11:00
math-emu powerpc: Correct emulated mtfsf instruction 2014-04-07 10:33:11 +10:00
mm mm/debug-pagealloc: make debug-pagealloc boottime configurable 2014-12-13 12:42:48 -08:00
net PPC: bpf_jit_comp: Unify BPF_MOD | BPF_X and BPF_DIV | BPF_X 2014-11-18 13:20:09 -05:00
oprofile powerpc updates for 3.19 2014-12-11 17:48:14 -08:00
perf power/perf/hv-24x7: Use kmem_cache_free() instead of kfree 2014-12-12 16:06:13 +11:00
platforms powernv/iommu: disable IOMMU bypass with param iommu=nobypass 2015-01-23 14:02:46 +11:00
sysdev powerpc/4xx: Fix return value check in hsta_msi_probe() 2014-12-29 15:45:43 +11:00
xmon powerpc/xmon: use isspace/isxdigit/isalnum from linux/ctype.h 2014-12-29 15:45:43 +11:00
Kconfig gcov: enable GCOV_PROFILE_ALL from ARCH Kconfigs 2014-12-13 12:42:51 -08:00
Kconfig.debug Patch queue for ppc - 2014-08-01 2014-08-05 09:58:11 +02:00
Makefile powerpc: Add POWER8 CPU selection 2014-09-25 23:14:49 +10:00
relocs_check.pl