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powerpc/mm: Fix page table dump to work on Radix

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[ Upstream commit 0d923962ab ]

When we're running on Book3S with the Radix MMU enabled the page table
dump currently prints the wrong addresses because it uses the wrong
start address.

Fix it to use PAGE_OFFSET rather than KERN_VIRT_START.

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Michael Ellerman 2018-08-15 21:29:45 +10:00 committed by Greg Kroah-Hartman
parent 63880b2f99
commit 287deb228d
1 changed files with 9 additions and 3 deletions
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12
arch/powerpc/mm/dump_linuxpagetables.c
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@ -418,12 +418,13 @@ static void walk_pagetables(struct pg_state *st)
unsigned int i;
unsigned long addr;
addr = st->start_address;
/*
* Traverse the linux pagetable structure and dump pages that are in
* the hash pagetable.
*/
for (i = 0; i < PTRS_PER_PGD; i++, pgd++) {
addr = KERN_VIRT_START + i * PGDIR_SIZE;
for (i = 0; i < PTRS_PER_PGD; i++, pgd++, addr += PGDIR_SIZE) {
if (!pgd_none(*pgd) && !pgd_huge(*pgd))
/* pgd exists */
walk_pud(st, pgd, addr);
@ -472,9 +473,14 @@ static int ptdump_show(struct seq_file *m, void *v)
{
struct pg_state st = {
.seq = m,
.start_address = KERN_VIRT_START,
.marker = address_markers,
};
if (radix_enabled())
st.start_address = PAGE_OFFSET;
else
st.start_address = KERN_VIRT_START;
/* Traverse kernel page tables */
walk_pagetables(&st);
note_page(&st, 0, 0, 0);