diff options
Diffstat (limited to 'arch/powerpc/kernel/entry_64.S')
| -rw-r--r-- | arch/powerpc/kernel/entry_64.S | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/entry_64.S b/arch/powerpc/kernel/entry_64.S index 54d9f5cdaab..5baea498ea6 100644 --- a/arch/powerpc/kernel/entry_64.S +++ b/arch/powerpc/kernel/entry_64.S @@ -323,6 +323,11 @@ _GLOBAL(ret_from_fork) * The code which creates the new task context is in 'copy_thread' * in arch/powerpc/kernel/process.c */ +#define SHADOW_SLB_BOLTED_STACK_ESID \ + (SLBSHADOW_SAVEAREA + 0x10*(SLB_NUM_BOLTED-1)) +#define SHADOW_SLB_BOLTED_STACK_VSID \ + (SLBSHADOW_SAVEAREA + 0x10*(SLB_NUM_BOLTED-1) + 8) + .align 7 _GLOBAL(_switch) mflr r0 @@ -375,6 +380,14 @@ BEGIN_FTR_SECTION ld r7,KSP_VSID(r4) /* Get new stack's VSID */ oris r0,r6,(SLB_ESID_V)@h ori r0,r0,(SLB_NUM_BOLTED-1)@l + + /* Update the last bolted SLB */ + ld r9,PACA_SLBSHADOWPTR(r13) + li r12,0 + std r12,SHADOW_SLB_BOLTED_STACK_ESID(r9) /* Clear ESID */ + std r7,SHADOW_SLB_BOLTED_STACK_VSID(r9) /* Save VSID */ + std r0,SHADOW_SLB_BOLTED_STACK_ESID(r9) /* Save ESID */ + slbie r6 slbie r6 /* Workaround POWER5 < DD2.1 issue */ slbmte r7,r0 |