powerpc: Implement PPR save/restore

[pandora-kernel.git] / arch / powerpc / kernel / entry_64.S

diff --git a/arch/powerpc/kernel/entry_64.S b/arch/powerpc/kernel/entry_64.S
index 7a70d0a..6faf51e 100644 (file)
--- a/arch/powerpc/kernel/entry_64.S
+++ b/arch/powerpc/kernel/entry_64.S
@@ -227,6 +227,7 @@ END_FTR_SECTION_IFCLR(CPU_FTR_STCX_CHECKS_ADDRESS)
 
        beq-    1f
        ACCOUNT_CPU_USER_EXIT(r11, r12)
+       HMT_MEDIUM_LOW_HAS_PPR
        ld      r13,GPR13(r1)   /* only restore r13 if returning to usermode */
 1:     ld      r2,GPR2(r1)
        ld      r1,GPR1(r1)
@@ -303,6 +304,7 @@ syscall_exit_work:
        subi    r12,r12,TI_FLAGS
 
 4:     /* Anything else left to do? */
+       SET_DEFAULT_THREAD_PPR(r3, r9)          /* Set thread.ppr = 3 */
        andi.   r0,r9,(_TIF_SYSCALL_T_OR_A|_TIF_SINGLESTEP)
        beq     .ret_from_except_lite
 
@@ -758,6 +760,7 @@ fast_exception_return:
        andi.   r0,r3,MSR_PR
        beq     1f
        ACCOUNT_CPU_USER_EXIT(r2, r4)
+       RESTORE_PPR(r2, r4)
        REST_GPR(13, r1)
 1:
        mtspr   SPRN_SRR1,r3