[PATCH v3 2/3] riscv: Introduce PBMT field to PTDUMP
Yu Chien Peter Lin
peterlin at andestech.com
Tue Sep 19 20:55:21 PDT 2023
This patch introduces the PBMT field to the PTDUMP, so it can
display the memory attributes for NC or IO.
Signed-off-by: Yu Chien Peter Lin <peterlin at andestech.com>
---
Changes v1 -> v2
- no change
Changes v2 -> v3
- Add ".." when PBMT field is clear
---
arch/riscv/mm/ptdump.c | 16 ++++++++++++++++
1 file changed, 16 insertions(+)
diff --git a/arch/riscv/mm/ptdump.c b/arch/riscv/mm/ptdump.c
index 57a0926c6627..13997cf3fe36 100644
--- a/arch/riscv/mm/ptdump.c
+++ b/arch/riscv/mm/ptdump.c
@@ -135,6 +135,12 @@ struct prot_bits {
static const struct prot_bits pte_bits[] = {
{
+#ifdef CONFIG_64BIT
+ .mask = _PAGE_MTMASK_SVPBMT,
+ .set = "MT(%s)",
+ .clear = " .. ",
+ }, {
+#endif
.mask = _PAGE_SOFT,
.set = "RSW(%d)",
.clear = " .. ",
@@ -205,6 +211,16 @@ static void dump_prot(struct pg_state *st)
if (val) {
if (pte_bits[i].mask == _PAGE_SOFT)
sprintf(s, pte_bits[i].set, val >> 8);
+#ifdef CONFIG_64BIT
+ else if (pte_bits[i].mask == _PAGE_MTMASK_SVPBMT) {
+ if (val == _PAGE_NOCACHE_SVPBMT)
+ sprintf(s, pte_bits[i].set, "NC");
+ else if (val == _PAGE_IO_SVPBMT)
+ sprintf(s, pte_bits[i].set, "IO");
+ else
+ sprintf(s, pte_bits[i].set, "??");
+ }
+#endif
else
sprintf(s, "%s", pte_bits[i].set);
} else {
--
2.34.1
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