powerpc/fsl_booke: Avoid creating duplicate tlb1 entry
authorLaurentiu Tudor <laurentiu.tudor@nxp.com>
Thu, 23 Jan 2020 11:19:25 +0000 (11:19 +0000)
committerMichael Ellerman <mpe@ellerman.id.au>
Tue, 17 Mar 2020 12:40:35 +0000 (23:40 +1100)
commitaa4113340ae6c2811e046f08c2bc21011d20a072
tree0c2c3f49bcd30617bacb3aead1e0e76208c30b71
parent3670664b5da555a2a481449b3baafff113b0ac35
powerpc/fsl_booke: Avoid creating duplicate tlb1 entry

In the current implementation, the call to loadcam_multi() is wrapped
between switch_to_as1() and restore_to_as0() calls so, when it tries
to create its own temporary AS=1 TLB1 entry, it ends up duplicating
the existing one created by switch_to_as1(). Add a check to skip
creating the temporary entry if already running in AS=1.

Fixes: d9e1831a4202 ("powerpc/85xx: Load all early TLB entries at once")
Cc: stable@vger.kernel.org # v4.4+
Signed-off-by: Laurentiu Tudor <laurentiu.tudor@nxp.com>
Acked-by: Scott Wood <oss@buserror.net>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200123111914.2565-1-laurentiu.tudor@nxp.com
arch/powerpc/mm/nohash/tlb_low.S