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MIPS: Initialise MAARs on secondary CPUs
MAARs should be initialised on each CPU (or rather, core) in the system in order to achieve consistent behaviour & performance. Previously they have only been initialised on the boot CPU which leads to performance problems if tasks are later scheduled on a secondary CPU, particularly if those tasks make use of unaligned vector accesses where some CPUs don't handle any cases in hardware for non-speculative memory regions. Fix this by recording the MAAR configuration from the boot CPU and applying it to secondary CPUs as part of their bringup. Reported-by: Doug Gilmore <doug.gilmore@imgtec.com> Signed-off-by: Paul Burton <paul.burton@imgtec.com> Cc: linux-mips@linux-mips.org Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Steven J. Hill <Steven.Hill@imgtec.com> Cc: Andrew Bresticker <abrestic@chromium.org> Cc: Bjorn Helgaas <bhelgaas@google.com> Cc: David Hildenbrand <dahi@linux.vnet.ibm.com> Cc: linux-kernel@vger.kernel.org Cc: Aaro Koskinen <aaro.koskinen@iki.fi> Cc: James Hogan <james.hogan@imgtec.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Markos Chandras <markos.chandras@imgtec.com> Cc: Hemmo Nieminen <hemmo.nieminen@iki.fi> Cc: Alex Smith <alex.smith@imgtec.com> Cc: Peter Zijlstra (Intel) <peterz@infradead.org> Patchwork: https://patchwork.linux-mips.org/patch/11239/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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