This reduces the number of nops for POWER8.
Signed-off-by: Nicholas Piggin <npig...@gmail.com>
---
arch/powerpc/kernel/idle_book3s.S | 19 ++++++++++++-------
1 file changed, 12 insertions(+), 7 deletions(-)
diff --git a/arch/powerpc/kernel/idle_book3s.S
b/arch/powerpc/kernel/idle_book3s.S
index 405631b2c229..9284ea0762b1 100644
--- a/arch/powerpc/kernel/idle_book3s.S
+++ b/arch/powerpc/kernel/idle_book3s.S
@@ -383,7 +383,11 @@ _GLOBAL(power9_idle_stop)
*/
.global pnv_powersave_wakeup
pnv_powersave_wakeup:
- bl pnv_restore_hyp_resource
+BEGIN_FTR_SECTION
+ bl pnv_restore_hyp_resource_arch300
+FTR_SECTION_ELSE
+ bl pnv_restore_hyp_resource_arch207
+ALT_FTR_SECTION_END_IFSET(CPU_FTR_ARCH_300)
li r0,PNV_THREAD_RUNNING
stb r0,PACA_THREAD_IDLE_STATE(r13) /* Clear thread state */
@@ -411,14 +415,13 @@ pnv_powersave_wakeup:
*
* cr3 - set to gt if waking up with partial/complete hypervisor state loss
*/
-pnv_restore_hyp_resource:
- ld r2,PACATOC(r13);
-
-BEGIN_FTR_SECTION
+pnv_restore_hyp_resource_arch300:
/*
* POWER ISA 3. Use PSSCR to determine if we
* are waking up from deep idle state
*/
+ ld r2,PACATOC(r13);
+
LOAD_REG_ADDRBASE(r5,pnv_first_deep_stop_state)
ld r4,ADDROFF(pnv_first_deep_stop_state)(r5)
@@ -433,12 +436,14 @@ BEGIN_FTR_SECTION
blr /* Waking up without hypervisor state loss. */
-END_FTR_SECTION_IFSET(CPU_FTR_ARCH_300)
-
+/* Same calling convention as arch300 */
+pnv_restore_hyp_resource_arch207:
/*
* POWER ISA 2.07 or less.
* Check if we slept with winkle.
*/
+ ld r2,PACATOC(r13);
+
lbz r0,PACA_THREAD_IDLE_STATE(r13)
cmpwi cr2,r0,PNV_THREAD_NAP
cmpwi cr4,r0,PNV_THREAD_WINKLE
--
2.11.0
