This is a note to let you know that I've just added the patch titled
powerpc/ptdump: Fix display of RW pages on FSL_BOOK3E
to the 5.19-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
powerpc-ptdump-fix-display-of-rw-pages-on-fsl_book3e.patch
and it can be found in the queue-5.19 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From dd8de84b57b02ba9c1fe530a6d916c0853f136bd Mon Sep 17 00:00:00 2001
From: Christophe Leroy <christophe.leroy@xxxxxxxxxx>
Date: Tue, 28 Jun 2022 16:43:35 +0200
Subject: powerpc/ptdump: Fix display of RW pages on FSL_BOOK3E
From: Christophe Leroy <christophe.leroy@xxxxxxxxxx>
commit dd8de84b57b02ba9c1fe530a6d916c0853f136bd upstream.
On FSL_BOOK3E, _PAGE_RW is defined with two bits, one for user and one
for supervisor. As soon as one of the two bits is set, the page has
to be display as RW. But the way it is implemented today requires both
bits to be set in order to display it as RW.
Instead of display RW when _PAGE_RW bits are set and R otherwise,
reverse the logic and display R when _PAGE_RW bits are all 0 and
RW otherwise.
This change has no impact on other platforms as _PAGE_RW is a single
bit on all of them.
Fixes: 8eb07b187000 ("powerpc/mm: Dump linux pagetables")
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Christophe Leroy <christophe.leroy@xxxxxxxxxx>
Signed-off-by: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/0c33b96317811edf691e81698aaee8fa45ec3449.1656427391.git.christophe.leroy@xxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/powerpc/mm/ptdump/shared.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
--- a/arch/powerpc/mm/ptdump/shared.c
+++ b/arch/powerpc/mm/ptdump/shared.c
@@ -17,9 +17,9 @@ static const struct flag_info flag_array
.clear = " ",
}, {
.mask = _PAGE_RW,
- .val = _PAGE_RW,
- .set = "rw",
- .clear = "r ",
+ .val = 0,
+ .set = "r ",
+ .clear = "rw",
}, {
.mask = _PAGE_EXEC,
.val = _PAGE_EXEC,
Patches currently in stable-queue which might be from christophe.leroy@xxxxxxxxxx are
queue-5.19/powerpc-restore-config_debug_info-in-defconfigs.patch
queue-5.19/powerpc-ptdump-fix-display-of-rw-pages-on-fsl_book3e.patch
queue-5.19/powerpc-64e-fix-early-tlb-miss-with-kuap.patch
