diff options
| author | Christophe Leroy <christophe.leroy@c-s.fr> | 2019-08-14 10:02:20 +0000 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2019-08-20 21:22:13 +1000 |
| commit | 9d6d712fbf7766f21c838940eebcd7b4d476c5e6 (patch) | |
| tree | 5ce76780dc590555230bbd461f0f486c641fc1be | |
| parent | 38a0d0cdb46d3f91534e5b9839ec2d67be14c59d (diff) | |
powerpc/32s: Fix boot failure with DEBUG_PAGEALLOC without KASAN.
When KASAN is selected, the definitive hash table has to be
set up later, but there is already an early temporary one.
When KASAN is not selected, there is no early hash table,
so the setup of the definitive hash table cannot be delayed.
Fixes: 72f208c6a8f7 ("powerpc/32s: move hash code patching out of MMU_init_hw()")
Cc: stable@vger.kernel.org # v5.2+
Reported-by: Jonathan Neuschafer <j.neuschaefer@gmx.net>
Tested-by: Jonathan Neuschafer <j.neuschaefer@gmx.net>
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/b7860c5e1e784d6b96ba67edf47dd6cbc2e78ab6.1565776892.git.christophe.leroy@c-s.fr
| -rw-r--r-- | arch/powerpc/kernel/head_32.S | 2 | ||||
| -rw-r--r-- | arch/powerpc/mm/book3s32/mmu.c | 9 |
2 files changed, 11 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/head_32.S b/arch/powerpc/kernel/head_32.S index f255e22184b4..c8b4f7ed318c 100644 --- a/arch/powerpc/kernel/head_32.S +++ b/arch/powerpc/kernel/head_32.S @@ -897,9 +897,11 @@ start_here: bl machine_init bl __save_cpu_setup bl MMU_init +#ifdef CONFIG_KASAN BEGIN_MMU_FTR_SECTION bl MMU_init_hw_patch END_MMU_FTR_SECTION_IFSET(MMU_FTR_HPTE_TABLE) +#endif /* * Go back to running unmapped so we can load up new values diff --git a/arch/powerpc/mm/book3s32/mmu.c b/arch/powerpc/mm/book3s32/mmu.c index e249fbf6b9c3..8d68f03bf5a4 100644 --- a/arch/powerpc/mm/book3s32/mmu.c +++ b/arch/powerpc/mm/book3s32/mmu.c @@ -358,6 +358,15 @@ void __init MMU_init_hw(void) hash_mb2 = hash_mb = 32 - LG_HPTEG_SIZE - lg_n_hpteg; if (lg_n_hpteg > 16) hash_mb2 = 16 - LG_HPTEG_SIZE; + + /* + * When KASAN is selected, there is already an early temporary hash + * table and the switch to the final hash table is done later. + */ + if (IS_ENABLED(CONFIG_KASAN)) + return; + + MMU_init_hw_patch(); } void __init MMU_init_hw_patch(void) |