This is a note to let you know that I've just added the patch titled
riscv: correct pt_level name via pgtable_l5/4_enabled
to the 6.6-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:
riscv-correct-pt_level-name-via-pgtable_l5-4_enabled.patch
and it can be found in the queue-6.6 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From e59e5e2754bf983fc58ad18f99b5eec01f1a0745 Mon Sep 17 00:00:00 2001
From: Song Shuai <suagrfillet@xxxxxxxxx>
Date: Tue, 29 Aug 2023 21:39:20 -0700
Subject: riscv: correct pt_level name via pgtable_l5/4_enabled
From: Song Shuai <suagrfillet@xxxxxxxxx>
commit e59e5e2754bf983fc58ad18f99b5eec01f1a0745 upstream.
The pt_level uses CONFIG_PGTABLE_LEVELS to display page table names.
But if page mode is downgraded from kernel cmdline or restricted by
the hardware in 64BIT, it will give a wrong name.
Like, using no4lvl for sv39, ptdump named the 1G-mapping as "PUD"
that should be "PGD":
0xffffffd840000000-0xffffffd900000000 0x00000000c0000000 3G PUD D A G . . W R V
So select "P4D/PUD" or "PGD" via pgtable_l5/4_enabled to correct it.
Fixes: e8a62cc26ddf ("riscv: Implement sv48 support")
Reviewed-by: Alexandre Ghiti <alexghiti@xxxxxxxxxxxx>
Signed-off-by: Song Shuai <suagrfillet@xxxxxxxxx>
Link: https://lore.kernel.org/r/20230712115740.943324-1-suagrfillet@xxxxxxxxx
Cc: stable@xxxxxxxxxxxxxxx
Link: https://lore.kernel.org/r/20230830044129.11481-3-palmer@xxxxxxxxxxxx
Signed-off-by: Palmer Dabbelt <palmer@xxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/riscv/mm/ptdump.c | 3 +++
1 file changed, 3 insertions(+)
--- a/arch/riscv/mm/ptdump.c
+++ b/arch/riscv/mm/ptdump.c
@@ -384,6 +384,9 @@ static int __init ptdump_init(void)
kernel_ptd_info.base_addr = KERN_VIRT_START;
+ pg_level[1].name = pgtable_l5_enabled ? "P4D" : "PGD";
+ pg_level[2].name = pgtable_l4_enabled ? "PUD" : "PGD";
+
for (i = 0; i < ARRAY_SIZE(pg_level); i++)
for (j = 0; j < ARRAY_SIZE(pte_bits); j++)
pg_level[i].mask |= pte_bits[j].mask;
Patches currently in stable-queue which might be from suagrfillet@xxxxxxxxx are
queue-6.6/riscv-correct-pt_level-name-via-pgtable_l5-4_enabled.patch
queue-6.6/riscv-mm-update-the-comment-of-config_page_offset.patch
