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powerpc/ptdump: Refactor update of pg_state

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In note_page(), the pg_state is updated the same way in two places.

Add note_page_update_state() to do it.

Also include the display of boundary markers there as it is missing
"no level" leg, leading to a mismatch when the first two markers
are at the same address and the first displayed area uses that
address.

Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/a284a809f01c705bbaab303b06fda216f147a99a.1593429426.git.christophe.leroy@csgroup.eu
This commit is contained in:
Christophe Leroy 2020-06-29 11:17:19 +00:00 committed by Michael Ellerman
parent 846feeace5
commit e54e30bca4
1 changed files with 20 additions and 14 deletions
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34
arch/powerpc/mm/ptdump/ptdump.c
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@ -199,6 +199,24 @@ static void note_prot_wx(struct pg_state *st, unsigned long addr)
st->wx_pages += (addr - st->start_address) / PAGE_SIZE;
}
static void note_page_update_state(struct pg_state *st, unsigned long addr,
unsigned int level, u64 val, unsigned long page_size)
{
u64 flag = val & pg_level[level].mask;
u64 pa = val & PTE_RPN_MASK;
st->level = level;
st->current_flags = flag;
st->start_address = addr;
st->start_pa = pa;
st->page_size = page_size;
while (addr >= st->marker[1].start_address) {
st->marker++;
pt_dump_seq_printf(st->seq, "---[ %s ]---\n", st->marker->name);
}
}
static void note_page(struct pg_state *st, unsigned long addr,
unsigned int level, u64 val, unsigned long page_size)
{
@ -207,12 +225,8 @@ static void note_page(struct pg_state *st, unsigned long addr,
/* At first no level is set */
if (!st->level) {
st->level = level;
st->current_flags = flag;
st->start_address = addr;
st->start_pa = pa;
st->page_size = page_size;
pt_dump_seq_printf(st->seq, "---[ %s ]---\n", st->marker->name);
note_page_update_state(st, addr, level, val, page_size);
/*
* Dump the section of virtual memory when:
* - the PTE flags from one entry to the next differs.
@ -244,15 +258,7 @@ static void note_page(struct pg_state *st, unsigned long addr,
* Address indicates we have passed the end of the
* current section of virtual memory
*/
while (addr >= st->marker[1].start_address) {
st->marker++;
pt_dump_seq_printf(st->seq, "---[ %s ]---\n", st->marker->name);
}
st->start_address = addr;
st->start_pa = pa;
st->page_size = page_size;
st->current_flags = flag;
st->level = level;
note_page_update_state(st, addr, level, val, page_size);
}
st->last_pa = pa;
}