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authorHaren Myneni <haren@linux.ibm.com>2020-07-10 16:47:19 -0700
committerMichael Ellerman <mpe@ellerman.id.au>2020-07-15 23:09:55 +1000
commit6068e1a4427e88f5cc62f238d1baf94a8b824ef4 (patch)
treef2e6f34ca9144a8a13c597806316ca012e419a7f /lib/zlib_dfltcc/dfltcc_util.h
parentb710d27bf72068b15b2f0305d825988183e2ff28 (diff)
downloadlinux-6068e1a4427e88f5cc62f238d1baf94a8b824ef4.tar.bz2
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: c96c4436aba4 ("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
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