diff options
Diffstat (limited to 'arch/powerpc')
| -rw-r--r-- | arch/powerpc/kernel/exceptions-64s.S | 8 | ||||
| -rw-r--r-- | arch/powerpc/kernel/idle_book3s.S | 7 |
2 files changed, 12 insertions, 3 deletions
diff --git a/arch/powerpc/kernel/exceptions-64s.S b/arch/powerpc/kernel/exceptions-64s.S index 07b79c2c70f8..02a82777fd5b 100644 --- a/arch/powerpc/kernel/exceptions-64s.S +++ b/arch/powerpc/kernel/exceptions-64s.S @@ -99,9 +99,11 @@ EXC_VIRT_NONE(0x4000, 0x100) #ifdef CONFIG_PPC_P7_NAP /* * If running native on arch 2.06 or later, check if we are waking up - * from nap/sleep/winkle, and branch to idle handler. The idle wakeup - * handler initially runs in real mode, but we branch to the 0xc000... - * address so we can turn on relocation with mtmsr. + * from nap/sleep/winkle, and branch to idle handler. This tests SRR1 + * bits 46:47. A non-0 value indicates that we are coming from a power + * saving state. The idle wakeup handler initially runs in real mode, + * but we branch to the 0xc000... address so we can turn on relocation + * with mtmsr. */ #define IDLETEST(n) \ BEGIN_FTR_SECTION ; \ diff --git a/arch/powerpc/kernel/idle_book3s.S b/arch/powerpc/kernel/idle_book3s.S index 1ea14b96f126..f6518c768d2a 100644 --- a/arch/powerpc/kernel/idle_book3s.S +++ b/arch/powerpc/kernel/idle_book3s.S @@ -436,6 +436,13 @@ ALT_FTR_SECTION_END_IFSET(CPU_FTR_ARCH_300) */ pnv_restore_hyp_resource_arch300: /* + * Workaround for POWER9, if we lost resources, the ERAT + * might have been mixed up and needs flushing. + */ + blt cr3,1f + PPC_INVALIDATE_ERAT +1: + /* * POWER ISA 3. Use PSSCR to determine if we * are waking up from deep idle state */ |