| commit | 253ce7b2cfc0bccc3470335b0d7282457926087d | |
| author | Nikunj A Dadhania <nikunj@linux.vnet.ibm.com> | |
| Thu, 27 Apr 2017 05:18:19 +0000 (27 10:48 +0530) | ||
| committer | David Gibson <david@gibson.dropbear.id.au> | |
| Wed, 10 May 2017 23:45:14 +0000 (11 09:45 +1000) | ||
| tree | dd65f81195f155f2819acfbfa42f8d17f8651e36 | treesnapshot (tar.gz zip) |
| parent | a1a636b8b444acacf8c4299923c907ed2475811f | commitdiff |
target/ppc: Emulate LL/SC using cmpxchg helpers
Emulating LL/SC with cmpxchg is not correct, since it can suffer from
the ABA problem. However, portable parallel code is written assuming
only cmpxchg which means that in practice this is a viable alternative.
Signed-off-by: Nikunj A Dadhania <nikunj@linux.vnet.ibm.com>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Emulating LL/SC with cmpxchg is not correct, since it can suffer from
the ABA problem. However, portable parallel code is written assuming
only cmpxchg which means that in practice this is a viable alternative.
Signed-off-by: Nikunj A Dadhania <nikunj@linux.vnet.ibm.com>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
| target/ppc/translate.c | diffblobblamehistory |