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arm64: ptdump: Use the ptdump description from a local context

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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@google.com>
Acked-by: Will Deacon <will@kernel.org>
Link: https://lore.kernel.org/r/20240909124721.1672199-4-sebastianene@google.com
Signed-off-by: Marc Zyngier <maz@kernel.org>
This commit is contained in:
Sebastian Ene 2024-09-09 12:47:19 +00:00 committed by Marc Zyngier
parent acc3d3a817
commit 9182301a7b
2 changed files with 9 additions and 5 deletions
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1
arch/arm64/include/asm/ptdump.h
View File

@ -45,6 +45,7 @@ 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;

13
arch/arm64/mm/ptdump.c
View File

@ -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 = {