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| author | Yu Chien Peter Lin <peterlin@andestech.com> | 2023-09-21 10:50:20 +0800 |
|---|---|---|
| committer | Palmer Dabbelt <palmer@rivosinc.com> | 2023-11-05 09:41:53 -0800 |
| commit | d5d2c264d33b9acf1a0216861942176ee3569258 (patch) | |
| tree | 3b380a9cc94482e4bcdaf381427bb946a53565cc /arch/riscv/include | |
| parent | 0bb80ecc33a8fb5a682236443c1e740d5c917d1d (diff) | |
| download | linux-d5d2c264d33b9acf1a0216861942176ee3569258.tar.gz linux-d5d2c264d33b9acf1a0216861942176ee3569258.tar.bz2 linux-d5d2c264d33b9acf1a0216861942176ee3569258.zip | |
riscv: Improve PTDUMP to show RSW with non-zero value
RSW field can be used to encode 2 bits of software
defined information. Currently, PTDUMP only prints
"RSW" when its value is 1 or 3.
To fix this issue and improve the debugging experience
with PTDUMP, we redefine _PAGE_SPECIAL to its original
value and use _PAGE_SOFT as the RSW mask, allow it to
print the RSW with any non-zero value.
This patch also removes the val from the struct prot_bits
as it is no longer needed.
Signed-off-by: Yu Chien Peter Lin <peterlin@andestech.com>
Reviewed-by: Alexandre Ghiti <alexghiti@rivosinc.com>
Tested-by: Alexandre Ghiti <alexghiti@rivosinc.com>
Link: https://lore.kernel.org/r/20230921025022.3989723-2-peterlin@andestech.com
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
Diffstat (limited to 'arch/riscv/include')
| -rw-r--r-- | arch/riscv/include/asm/pgtable-bits.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/riscv/include/asm/pgtable-bits.h b/arch/riscv/include/asm/pgtable-bits.h index f896708e8331..179bd4afece4 100644 --- a/arch/riscv/include/asm/pgtable-bits.h +++ b/arch/riscv/include/asm/pgtable-bits.h @@ -16,9 +16,9 @@ #define _PAGE_GLOBAL (1 << 5) /* Global */ #define _PAGE_ACCESSED (1 << 6) /* Set by hardware on any access */ #define _PAGE_DIRTY (1 << 7) /* Set by hardware on any write */ -#define _PAGE_SOFT (1 << 8) /* Reserved for software */ +#define _PAGE_SOFT (3 << 8) /* Reserved for software */ -#define _PAGE_SPECIAL _PAGE_SOFT +#define _PAGE_SPECIAL (1 << 8) /* RSW: 0x1 */ #define _PAGE_TABLE _PAGE_PRESENT /* |