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| author | Christophe Leroy <christophe.leroy@c-s.fr> | 2018-01-12 13:45:29 +0100 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2018-01-16 23:47:14 +1100 |
| commit | 351750331fc1580cdb60d2efef04238f5faa89fe (patch) | |
| tree | fab5ee5e236ff91fd63640f27f142bee3b691cbb /arch/powerpc/mm | |
| parent | 812fadcb941a81d1f3948b10a95a4dce663da3e4 (diff) | |
| download | linux-351750331fc1580cdb60d2efef04238f5faa89fe.tar.bz2 | |
powerpc/mm: Introduce _PAGE_NA
Today, PAGE_NONE is defined as a page not having _PAGE_USER.
In some circunstances, when the CPU supports it, it might be
better to be able to flag a page with NO ACCESS.
In a following patch, the 8xx will switch user access being flagged
in the PMD, therefore it will not be possible anymore to use
_PAGE_USER as a way to flag a page with no access.
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/mm')
| -rw-r--r-- | arch/powerpc/mm/dump_linuxpagetables.c | 18 |
1 files changed, 11 insertions, 7 deletions
diff --git a/arch/powerpc/mm/dump_linuxpagetables.c b/arch/powerpc/mm/dump_linuxpagetables.c index d87ab2cabaa6..876e2a3c79f2 100644 --- a/arch/powerpc/mm/dump_linuxpagetables.c +++ b/arch/powerpc/mm/dump_linuxpagetables.c @@ -117,16 +117,20 @@ static const struct flag_info flag_array[] = { .set = "user", .clear = " ", }, { -#if _PAGE_RO == 0 - .mask = _PAGE_RW, + .mask = _PAGE_RW | _PAGE_RO | _PAGE_NA, .val = _PAGE_RW, -#else - .mask = _PAGE_RO, - .val = 0, -#endif .set = "rw", - .clear = "ro", }, { + .mask = _PAGE_RW | _PAGE_RO | _PAGE_NA, + .val = _PAGE_RO, + .set = "ro", + }, { +#if _PAGE_NA != 0 + .mask = _PAGE_RW | _PAGE_RO | _PAGE_NA, + .val = _PAGE_RO, + .set = "na", + }, { +#endif .mask = _PAGE_EXEC, .val = _PAGE_EXEC, .set = " X ", |