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385e89d5b2
The 603 doesn't have a HASH table, TLB misses are handled by software. It is then possible to generate page fault when _PAGE_EXEC is not set like in nohash/32. There is one "reserved" PTE bit available, this patch uses it for _PAGE_EXEC. In order to support it, set_pte_filter() and set_access_flags_filter() are made common, and the handling is made dependent on MMU_FTR_HPTE_TABLE Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr> Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
81 lines
1.5 KiB
C
81 lines
1.5 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* From split of dump_linuxpagetables.c
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* Copyright 2016, Rashmica Gupta, IBM Corp.
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*
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*/
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#include <linux/kernel.h>
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#include <asm/pgtable.h>
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#include "dump_linuxpagetables.h"
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static const struct flag_info flag_array[] = {
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{
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.mask = _PAGE_USER,
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.val = _PAGE_USER,
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.set = "user",
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.clear = " ",
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}, {
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.mask = _PAGE_RW,
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.val = _PAGE_RW,
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.set = "rw",
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.clear = "r ",
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}, {
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.mask = _PAGE_EXEC,
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.val = _PAGE_EXEC,
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.set = " X ",
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.clear = " ",
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}, {
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.mask = _PAGE_PRESENT,
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.val = _PAGE_PRESENT,
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.set = "present",
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.clear = " ",
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}, {
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.mask = _PAGE_GUARDED,
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.val = _PAGE_GUARDED,
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.set = "guarded",
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.clear = " ",
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}, {
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.mask = _PAGE_DIRTY,
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.val = _PAGE_DIRTY,
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.set = "dirty",
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.clear = " ",
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}, {
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.mask = _PAGE_ACCESSED,
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.val = _PAGE_ACCESSED,
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.set = "accessed",
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.clear = " ",
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}, {
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.mask = _PAGE_WRITETHRU,
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.val = _PAGE_WRITETHRU,
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.set = "write through",
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.clear = " ",
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}, {
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.mask = _PAGE_NO_CACHE,
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.val = _PAGE_NO_CACHE,
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.set = "no cache",
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.clear = " ",
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}, {
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.mask = _PAGE_SPECIAL,
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.val = _PAGE_SPECIAL,
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.set = "special",
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}
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};
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struct pgtable_level pg_level[5] = {
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{
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}, { /* pgd */
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.flag = flag_array,
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.num = ARRAY_SIZE(flag_array),
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}, { /* pud */
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.flag = flag_array,
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.num = ARRAY_SIZE(flag_array),
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}, { /* pmd */
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.flag = flag_array,
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.num = ARRAY_SIZE(flag_array),
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}, { /* pte */
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.flag = flag_array,
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.num = ARRAY_SIZE(flag_array),
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},
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};
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