To get accurate and repeatable L2 cache performance metrics,
the L2 region prefetcher must be disabled. This prevents
speculative fetches from interfering with the measurements.
This patch adds a build-time option, NEOVERSE_N2_PREFETCHER_DISABLE,
to set the PF_DIS bit (bit 15) in the CPUECTLR_EL1 register for this
purpose.
Change-Id: Ie7ab9e84bb29d042d0bb2ec697e0c1e39ad5032e
Signed-off-by: Rohit Ner <rohitner@google.com>
(cherry picked from commit 75384389b9)
Rohit NerandJidong Sun
6b0de60c83