CONFIG_PL310_ERRATA_753970 is not available for thedefaultarchitecture x86.
Result is shown for architecture arm
PL310 errata: cache sync operation may be faulty
configname: CONFIG_PL310_ERRATA_753970
Linux Kernel Configuration
└─>PL310 errata: cache sync operation may be faulty
In linux kernel since version 3.1 (release Date: 2011-10-24)
This option enables the workaround for the 753970 PL310 (r3p0) erratum.
Under some condition the effect of cache sync operation on
the store buffer still remains when the operation completes.
This means that the store buffer is always asked to drain and
this prevents it from merging any further writes. The workaround
is to replace the normal offset of cache sync operation (0x730)
by another offset targeting an unmapped PL310 register 0x740.
This has the same effect as the cache sync operation: store buffer
drain and waiting for all buffers empty.
Under some condition the effect of cache sync operation on
the store buffer still remains when the operation completes.
This means that the store buffer is always asked to drain and
this prevents it from merging any further writes. The workaround
is to replace the normal offset of cache sync operation (0x730)
by another offset targeting an unmapped PL310 register 0x740.
This has the same effect as the cache sync operation: store buffer
drain and waiting for all buffers empty.