]> git.baikalelectronics.ru Git - kernel.git/commit
MIPS: tlb-r4k: If there are wired entries, don't use TLBINVF
authorMatt Redfearn <matt.redfearn@imgtec.com>
Tue, 20 Sep 2016 08:47:25 +0000 (09:47 +0100)
committerRalf Baechle <ralf@linux-mips.org>
Tue, 4 Oct 2016 23:31:20 +0000 (01:31 +0200)
commit32c26a42763fae90e851e0107387d0c00bb7d04a
treee23ef0deba73c43be007abbcbc4444c4dfa1a2e7
parent728ce86ab1efb191a9f88594ca738aae0ccfa126
MIPS: tlb-r4k: If there are wired entries, don't use TLBINVF

When adding a wired entry to the TLB via add_wired_entry, the tlb is
flushed with local_flush_tlb_all, which on CPUs with TLBINV results in
the new wired entry being flushed again.

Behavior of the TLBINV instruction applies to all applicable TLB entries
and is unaffected by the setting of the Wired register. Therefore if
the TLB has any wired entries, fall back to iterating over the entries
rather than blasting them all using TLBINVF.

Signed-off-by: Matt Redfearn <matt.redfearn@imgtec.com>
Cc: Bjorn Andersson <bjorn.andersson@linaro.org>
Cc: Ohad Ben-Cohen <ohad@wizery.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: lisa.parratt@imgtec.com
Cc: Hugh Dickins <hughd@google.com>
Cc: Huacai Chen <chenhc@lemote.com>
Cc: David S. Miller <davem@davemloft.net>
Cc: James Hogan <james.hogan@imgtec.com>
Cc: Paul Burton <paul.burton@imgtec.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: linux-mips@linux-mips.org
Cc: linux-remoteproc@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/14283/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
arch/mips/mm/tlb-r4k.c