From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: From: Sasha Levin To: stable@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Michael Ellerman , Sasha Levin Subject: [PATCH AUTOSEL 4.19 12/57] powerpc/mm: Fix page table dump to work on Radix Date: Sun, 4 Nov 2018 08:50:59 -0500 Message-Id: <20181104135144.88324-12-sashal@kernel.org> In-Reply-To: <20181104135144.88324-1-sashal@kernel.org> References: <20181104135144.88324-1-sashal@kernel.org> List-ID: From: Michael Ellerman [ Upstream commit 0d923962ab69c27cca664a2d535e90ef655110ca ] 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 Signed-off-by: Sasha Levin --- arch/powerpc/mm/dump_linuxpagetables.c | 12 +++++++++--- 1 file changed, 9 insertions(+), 3 deletions(-) diff --git a/arch/powerpc/mm/dump_linuxpagetables.c b/arch/powerpc/mm/dump_linuxpagetables.c index 876e2a3c79f2..bdf33b989f98 100644 --- a/arch/powerpc/mm/dump_linuxpagetables.c +++ b/arch/powerpc/mm/dump_linuxpagetables.c @@ -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); -- 2.17.1