powerpc: In HV mode, use HSPRG0 for PACA

When running in Hypervisor mode (arch 2.06 or later), we store the PACA
in HSPRG0 instead of SPRG1. The architecture specifies that SPRGs may be
lost during a "nap" power management operation (though they aren't
currently on POWER7) and this enables use of SPRG1 by KVM guests.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

1 files changed, 2 insertions, 2 deletions

diff --git a/arch/powerpc/kernel/entry_64.S b/arch/powerpc/kernel/entry_64.S
index d82878c4daa6..dbf5bfafd7bc 100644
--- a/arch/powerpc/kernel/entry_64.S
+++ b/arch/powerpc/kernel/entry_64.S
@@ -838,7 +838,7 @@ _GLOBAL(enter_rtas)
 
 _STATIC(rtas_return_loc)
         /* relocation is off at this point */
-        mfspr   r4,SPRN_SPRG_PACA       /* Get PACA */
+        GET_PACA(r4)
         clrldi  r4,r4,2                 /* convert to realmode address */
 
         bcl     20,31,$+4
@@ -869,7 +869,7 @@ _STATIC(rtas_restore_regs)
         REST_8GPRS(14, r1)              /* Restore the non-volatiles */
         REST_10GPRS(22, r1)             /* ditto */
 
-        mfspr   r13,SPRN_SPRG_PACA
+        GET_PACA(r13)
 
         ld      r4,_CCR(r1)
         mtcr    r4