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authorKhalid Aziz <khalid.aziz@oracle.com>2018-02-21 10:15:48 -0700
committerDavid S. Miller <davem@davemloft.net>2018-03-18 07:38:46 -0700
commitc6202ca764ac7b3728e29bca616567beb57fbac7 (patch)
tree70c5121ba4dc4d6756fac91ef3c7857da1edd314 /mm/mprotect.c
parent94addb3530bb81e7ffde2c5c50a88310f734c365 (diff)
sparc64: Add auxiliary vectors to report platform ADI properties
ADI feature on M7 and newer processors has three important properties relevant to userspace apps using ADI capabilities - (1) Size of block of memory an ADI version tag applies to, (2) Number of uppermost bits in virtual address used to encode ADI tag, and (3) The value M7 processor will force the ADI tags to if it detects uncorrectable error in an ADI tagged cacheline. Kernel can retrieve these properties for a platform through machine description provided by the firmware. This patch adds code to retrieve these properties and report them to userspace through auxiliary vectors. Signed-off-by: Khalid Aziz <khalid.aziz@oracle.com> Cc: Khalid Aziz <khalid@gonehiking.org> Reviewed-by: Anthony Yznaga <anthony.yznaga@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'mm/mprotect.c')
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