powerpc/mm: Fix spurrious segfaults on radix with autonuma

When autonuma (Automatic NUMA balancing) marks a PTE inaccessible it
clears all the protection bits but leave the PTE valid.

With the Radix MMU, an attempt at executing from such a PTE will
take a fault with bit 35 of SRR1 set "SRR1_ISI_N_OR_G".

It is thus incorrect to treat all such faults as errors. We should
pass them to handle_mm_fault() for autonuma to deal with. The case
of pages that are really not executable is handled by the existing
test for VM_EXEC further down.

That leaves us with catching the kernel attempts at executing user
pages. We can catch that earlier, even before we do find_vma.

It is never valid on powerpc for the kernel to take an exec fault
to begin with. So fold that test with the existing test for the
kernel faulting on kernel addresses to bail out early.

Fixes: 1d18ad026844 ("powerpc/mm: Detect instruction fetch denied and report")
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Acked-by: Balbir Singh <bsingharora@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

path: root/include/dt-bindings/clock/clps711x-clock.h

/*
 * Copyright (C) 2014 Alexander Shiyan <shc_work@mail.ru>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 */

#ifndef __DT_BINDINGS_CLOCK_CLPS711X_H
#define __DT_BINDINGS_CLOCK_CLPS711X_H

#define CLPS711X_CLK_DUMMY	0
#define CLPS711X_CLK_CPU	1
#define CLPS711X_CLK_BUS	2
#define CLPS711X_CLK_PLL	3
#define CLPS711X_CLK_TIMERREF	4
#define CLPS711X_CLK_TIMER1	5
#define CLPS711X_CLK_TIMER2	6
#define CLPS711X_CLK_PWM	7
#define CLPS711X_CLK_SPIREF	8
#define CLPS711X_CLK_SPI	9
#define CLPS711X_CLK_UART	10
#define CLPS711X_CLK_TICK	11
#define CLPS711X_CLK_MAX	12

#endif