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Message-ID: <20240827084549.45731-4-sebastianene@google.com>
Date: Tue, 27 Aug 2024 08:45:46 +0000
From: Sebastian Ene <sebastianene@...gle.com>
To: akpm@...ux-foundation.org, alexghiti@...osinc.com, ankita@...dia.com,
ardb@...nel.org, catalin.marinas@....com, christophe.leroy@...roup.eu,
james.morse@....com, vdonnefort@...gle.com, mark.rutland@....com,
maz@...nel.org, oliver.upton@...ux.dev, rananta@...gle.com,
ryan.roberts@....com, sebastianene@...gle.com, shahuang@...hat.com,
suzuki.poulose@....com, will@...nel.org, yuzenghui@...wei.com
Cc: kvmarm@...ts.linux.dev, linux-arm-kernel@...ts.infradead.org,
linux-kernel@...r.kernel.org, kernel-team@...roid.com
Subject: [PATCH v9 3/5] arm64: ptdump: Use the ptdump description from a local context
Rename the attributes description array to allow the parsing method
to use the description from a local context. To be able to do this,
store a pointer to the description array in the state structure. This
will allow for the later introduced callers (stage_2 ptdump) to specify
their own page table description format to the ptdump parser.
Signed-off-by: Sebastian Ene <sebastianene@...gle.com>
---
arch/arm64/include/asm/ptdump.h | 1 +
arch/arm64/mm/ptdump.c | 13 ++++++++-----
2 files changed, 9 insertions(+), 5 deletions(-)
diff --git a/arch/arm64/include/asm/ptdump.h b/arch/arm64/include/asm/ptdump.h
index bd5d3ee3e8dc..71a7ed01153a 100644
--- a/arch/arm64/include/asm/ptdump.h
+++ b/arch/arm64/include/asm/ptdump.h
@@ -44,6 +44,7 @@ struct ptdump_pg_level {
*/
struct ptdump_pg_state {
struct ptdump_state ptdump;
+ struct ptdump_pg_level *pg_level;
struct seq_file *seq;
const struct addr_marker *marker;
const struct mm_struct *mm;
diff --git a/arch/arm64/mm/ptdump.c b/arch/arm64/mm/ptdump.c
index 404751fd30fe..ca53ef274a8b 100644
--- a/arch/arm64/mm/ptdump.c
+++ b/arch/arm64/mm/ptdump.c
@@ -117,7 +117,7 @@ static const struct ptdump_prot_bits pte_bits[] = {
}
};
-static struct ptdump_pg_level pg_level[] __ro_after_init = {
+static struct ptdump_pg_level kernel_pg_levels[] __ro_after_init = {
{ /* pgd */
.name = "PGD",
.bits = pte_bits,
@@ -192,6 +192,7 @@ void note_page(struct ptdump_state *pt_st, unsigned long addr, int level,
u64 val)
{
struct ptdump_pg_state *st = container_of(pt_st, struct ptdump_pg_state, ptdump);
+ struct ptdump_pg_level *pg_level = st->pg_level;
static const char units[] = "KMGTPE";
u64 prot = 0;
@@ -262,6 +263,7 @@ void ptdump_walk(struct seq_file *s, struct ptdump_info *info)
.seq = s,
.marker = info->markers,
.mm = info->mm,
+ .pg_level = &kernel_pg_levels[0],
.level = -1,
.ptdump = {
.note_page = note_page,
@@ -279,10 +281,10 @@ static void __init ptdump_initialize(void)
{
unsigned i, j;
- for (i = 0; i < ARRAY_SIZE(pg_level); i++)
- if (pg_level[i].bits)
- for (j = 0; j < pg_level[i].num; j++)
- pg_level[i].mask |= pg_level[i].bits[j].mask;
+ for (i = 0; i < ARRAY_SIZE(kernel_pg_levels); i++)
+ if (kernel_pg_levels[i].bits)
+ for (j = 0; j < kernel_pg_levels[i].num; j++)
+ kernel_pg_levels[i].mask |= kernel_pg_levels[i].bits[j].mask;
}
static struct ptdump_info kernel_ptdump_info __ro_after_init = {
@@ -297,6 +299,7 @@ bool ptdump_check_wx(void)
{ 0, NULL},
{ -1, NULL},
},
+ .pg_level = &kernel_pg_levels[0],
.level = -1,
.check_wx = true,
.ptdump = {
--
2.46.0.295.g3b9ea8a38a-goog
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