mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-21 03:33:59 +08:00
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
|
|
/*
|
|
* From split of dump_linuxpagetables.c
|
|
* Copyright 2016, Rashmica Gupta, IBM Corp.
|
|
*
|
|
*/
|
|
#include <linux/kernel.h>
|
|
#include <asm/pgtable.h>
|
|
|
|
#include "dump_linuxpagetables.h"
|
|
|
|
static const struct flag_info flag_array[] = {
|
|
{
|
|
.mask = _PAGE_USER,
|
|
.val = _PAGE_USER,
|
|
.set = "user",
|
|
.clear = " ",
|
|
}, {
|
|
.mask = _PAGE_RW,
|
|
.val = _PAGE_RW,
|
|
.set = "rw",
|
|
.clear = "r ",
|
|
}, {
|
|
.mask = _PAGE_EXEC,
|
|
.val = _PAGE_EXEC,
|
|
.set = " X ",
|
|
.clear = " ",
|
|
}, {
|
|
.mask = _PAGE_PRESENT,
|
|
.val = _PAGE_PRESENT,
|
|
.set = "present",
|
|
.clear = " ",
|
|
}, {
|
|
.mask = _PAGE_GUARDED,
|
|
.val = _PAGE_GUARDED,
|
|
.set = "guarded",
|
|
.clear = " ",
|
|
}, {
|
|
.mask = _PAGE_DIRTY,
|
|
.val = _PAGE_DIRTY,
|
|
.set = "dirty",
|
|
.clear = " ",
|
|
}, {
|
|
.mask = _PAGE_ACCESSED,
|
|
.val = _PAGE_ACCESSED,
|
|
.set = "accessed",
|
|
.clear = " ",
|
|
}, {
|
|
.mask = _PAGE_WRITETHRU,
|
|
.val = _PAGE_WRITETHRU,
|
|
.set = "write through",
|
|
.clear = " ",
|
|
}, {
|
|
.mask = _PAGE_NO_CACHE,
|
|
.val = _PAGE_NO_CACHE,
|
|
.set = "no cache",
|
|
.clear = " ",
|
|
}, {
|
|
.mask = _PAGE_SPECIAL,
|
|
.val = _PAGE_SPECIAL,
|
|
.set = "special",
|
|
}
|
|
};
|
|
|
|
struct pgtable_level pg_level[5] = {
|
|
{
|
|
}, { /* pgd */
|
|
.flag = flag_array,
|
|
.num = ARRAY_SIZE(flag_array),
|
|
}, { /* pud */
|
|
.flag = flag_array,
|
|
.num = ARRAY_SIZE(flag_array),
|
|
}, { /* pmd */
|
|
.flag = flag_array,
|
|
.num = ARRAY_SIZE(flag_array),
|
|
}, { /* pte */
|
|
.flag = flag_array,
|
|
.num = ARRAY_SIZE(flag_array),
|
|
},
|
|
};
|