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linux-stable/arch/powerpc
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Haren Myneni 6068e1a442 powerpc/vas: Report proper error code for address translation failure 
P9 DD2 NX workbook (Table 4-36) says DMA controller uses CC=5
internally for translation fault handling. NX reserves CC=250 for
OS to notify user space when NX encounters address translation
failure on the request buffer. Not an issue in earlier releases
as NX does not get faults on kernel addresses.

This patch defines CSB_CC_FAULT_ADDRESS(250) and updates CSB.CC with
this proper error code for user space.

Fixes: c96c4436ab ("powerpc/vas: Update CSB and notify process for fault CRBs")
Signed-off-by: Haren Myneni <haren@linux.ibm.com>
[mpe: Added Fixes tag and fix typo in comment]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/019fd53e7538c6f8f332d175df74b1815ef5aa8c.camel@linux.ibm.com
2020-07-15 23:09:55 +10:00
..
boot powerpc/40x: Remove EP405 2020-05-28 23:24:35 +10:00
configs powerpc/configs: Add LIBNVDIMM to ppc64_defconfig 2020-06-02 20:59:08 +10:00
crypto crypto: lib/sha1 - remove unnecessary includes of linux/cryptohash.h 2020-05-08 15:32:17 +10:00
include powerpc/vas: Report proper error code for address translation failure 2020-07-15 23:09:55 +10:00
kernel powerpc/pseries/svm: Fix incorrect check for shared_lppaca_size 2020-07-14 21:57:26 +10:00
kexec powerpc/crash: Use NMI context for printk when starting to crash 2020-06-02 20:59:07 +10:00
kvm powerpc/kvm/book3s64: Fix kernel crash with nested kvm & DEBUG_VIRTUAL 2020-06-22 21:55:45 +10:00
lib maccess: rename probe_user_{read,write} to copy_{from,to}_user_nofault 2020-06-17 10:57:41 -07:00
math-emu
mm powerpc/book3s64/pkeys: Fix pkey_access_permitted() for execute disable pkey 2020-07-13 16:07:17 +10:00
net
oprofile maccess: rename probe_user_{read,write} to copy_{from,to}_user_nofault 2020-06-17 10:57:41 -07:00
perf maccess: rename probe_user_{read,write} to copy_{from,to}_user_nofault 2020-06-17 10:57:41 -07:00
platforms powerpc/vas: Report proper error code for address translation failure 2020-07-15 23:09:55 +10:00
purgatory
sysdev maccess: rename probe_kernel_address to get_kernel_nofault 2020-06-18 11:14:40 -07:00
tools powerpc/head_check: Avoid broken pipe 2020-05-19 00:10:35 +10:00
xmon mm: don't include asm/pgtable.h if linux/mm.h is already included 2020-06-09 09:39:13 -07:00
Kbuild
Kconfig powerpc updates for 5.8 2020-06-05 12:39:30 -07:00
Kconfig.debug powerpc: Remove Xilinx PPC405/PPC440 support 2020-05-28 23:24:34 +10:00
Makefile
Makefile.postlink