diff options
| -rw-r--r-- | arch/powerpc/kernel/exceptions-64s.S | 15 | ||||
| -rw-r--r-- | arch/powerpc/kernel/head_64.S | 3 | ||||
| -rw-r--r-- | arch/powerpc/kernel/setup_64.c | 1 |
3 files changed, 17 insertions, 2 deletions
diff --git a/arch/powerpc/kernel/exceptions-64s.S b/arch/powerpc/kernel/exceptions-64s.S index 8d658c740db8..c3b803d6d805 100644 --- a/arch/powerpc/kernel/exceptions-64s.S +++ b/arch/powerpc/kernel/exceptions-64s.S @@ -725,8 +725,8 @@ END_FTR_SECTION_IFSET(CPU_FTR_CFAR) * userspace starts. */ .macro EARLY_BOOT_FIXUP -#ifdef CONFIG_CPU_LITTLE_ENDIAN BEGIN_FTR_SECTION +#ifdef CONFIG_CPU_LITTLE_ENDIAN tdi 0,0,0x48 // Trap never, or in reverse endian: b . + 8 b 2f // Skip trampoline if endian is correct .long 0xa643707d // mtsprg 0, r11 Backup r11 @@ -753,8 +753,19 @@ BEGIN_FTR_SECTION mtsrr0 r11 // Restore SRR0 mfsprg r11, 0 // Restore r11 2: -END_FTR_SECTION(0, 1) // nop out after boot #endif + /* + * program check could hit at any time, and pseries can not block + * MSR[ME] in early boot. So check if there is anything useful in r13 + * yet, and spin forever if not. + */ + mtsprg 0, r11 + mfcr r11 + cmpdi r13, 0 + beq . + mtcr r11 + mfsprg r11, 0 +END_FTR_SECTION(0, 1) // nop out after boot .endm /* diff --git a/arch/powerpc/kernel/head_64.S b/arch/powerpc/kernel/head_64.S index c63e0c086f03..cfc09a96a420 100644 --- a/arch/powerpc/kernel/head_64.S +++ b/arch/powerpc/kernel/head_64.S @@ -487,6 +487,9 @@ __start_initialization_multiplatform: /* Make sure we are running in 64 bits mode */ bl enable_64b_mode + /* Zero r13 (paca) so early program check / mce don't use it */ + li r13,0 + /* Get TOC pointer (current runtime address) */ bl relative_toc diff --git a/arch/powerpc/kernel/setup_64.c b/arch/powerpc/kernel/setup_64.c index 6312a3fe8eff..a0dee7354fe6 100644 --- a/arch/powerpc/kernel/setup_64.c +++ b/arch/powerpc/kernel/setup_64.c @@ -364,6 +364,7 @@ void __init early_setup(unsigned long dt_ptr) */ initialise_paca(&boot_paca, 0); fixup_boot_paca(&boot_paca); + WARN_ON(local_paca != 0); setup_paca(&boot_paca); /* install the paca into registers */ /* -------- printk is now safe to use ------- */ |