Subject: [PATCH 1/5] powerpc/64s: move remaining system reset idle code into idle_book3s.S

From: Nicholas Piggin <[email-masked]>
Date: Fri, 17 Feb 2017 04:38:57 +1000

Should be no functional change.

Signed-off-by: Nicholas Piggin <[email-masked]>
---
 arch/powerpc/kernel/exceptions-64s.S | 26 +-----------------------
 arch/powerpc/kernel/idle_book3s.S    | 39 +++++++++++++++++++++++++++++++-----
 2 files changed, 35 insertions(+), 30 deletions(-)

diff --git a/arch/powerpc/kernel/exceptions-64s.S b/arch/powerpc/kernel/exceptions-64s.S
index 0e1350b30160..d0d89047befe 100644
--- a/arch/powerpc/kernel/exceptions-64s.S
+++ b/arch/powerpc/kernel/exceptions-64s.S
@@ -130,31 +130,7 @@ EXC_VIRT_NONE(0x4100, 0x4200)
 
 #ifdef CONFIG_PPC_P7_NAP
 EXC_COMMON_BEGIN(system_reset_idle_common)
-BEGIN_FTR_SECTION
-	GET_PACA(r13) /* Restore HSPRG0 to get the winkle bit in r13 */
-END_FTR_SECTION_IFCLR(CPU_FTR_ARCH_300)
-	bl	pnv_restore_hyp_resource
-
-	li	r0,PNV_THREAD_RUNNING
-	stb	r0,PACA_THREAD_IDLE_STATE(r13)	/* Clear thread state */
-
-#ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
-	li	r0,KVM_HWTHREAD_IN_KERNEL
-	stb	r0,HSTATE_HWTHREAD_STATE(r13)
-	/* Order setting hwthread_state vs. testing hwthread_req */
-	sync
-	lbz	r0,HSTATE_HWTHREAD_REQ(r13)
-	cmpwi	r0,0
-	beq	1f
-	b	kvm_start_guest
-1:
-#endif
-
-	/* Return SRR1 from power7_nap() */
-	mfspr	r3,SPRN_SRR1
-	blt	cr3,2f
-	b	pnv_wakeup_loss
-2:	b	pnv_wakeup_noloss
+	b	pnv_powersave_wakeup
 #endif
 
 EXC_COMMON_BEGIN(system_reset_common)
diff --git a/arch/powerpc/kernel/idle_book3s.S b/arch/powerpc/kernel/idle_book3s.S
index 72dac0b58061..ea3562f83c57 100644
--- a/arch/powerpc/kernel/idle_book3s.S
+++ b/arch/powerpc/kernel/idle_book3s.S
@@ -115,7 +115,7 @@ core_idle_lock_held:
  *
  * Address to 'rfid' to in r5
  */
-_GLOBAL(pnv_powersave_common)
+pnv_powersave_common:
 	/* Use r3 to pass state nap/sleep/winkle */
 	/* NAP is a state loss, we create a regs frame on the
 	 * stack, fill it up with the state we care about and
@@ -365,6 +365,34 @@ _GLOBAL(power9_idle_stop)
 	LOAD_REG_ADDR(r5,power_enter_stop)
 	b	pnv_powersave_common
 	/* No return */
+
+.global pnv_powersave_wakeup
+pnv_powersave_wakeup:
+BEGIN_FTR_SECTION
+	GET_PACA(r13) /* Restore HSPRG0 to get the winkle bit in r13 */
+END_FTR_SECTION_IFCLR(CPU_FTR_ARCH_300)
+	bl	pnv_restore_hyp_resource
+
+	li	r0,PNV_THREAD_RUNNING
+	stb	r0,PACA_THREAD_IDLE_STATE(r13)	/* Clear thread state */
+
+#ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
+	li	r0,KVM_HWTHREAD_IN_KERNEL
+	stb	r0,HSTATE_HWTHREAD_STATE(r13)
+	/* Order setting hwthread_state vs. testing hwthread_req */
+	sync
+	lbz	r0,HSTATE_HWTHREAD_REQ(r13)
+	cmpwi	r0,0
+	beq	1f
+	b	kvm_start_guest
+1:
+#endif
+
+	/* Return SRR1 from power7_nap() */
+	mfspr	r3,SPRN_SRR1
+	blt	cr3,pnv_wakeup_noloss
+	b	pnv_wakeup_loss
+
 /*
  * Called from reset vector. Check whether we have woken up with
  * hypervisor state loss. If yes, restore hypervisor state and return
@@ -373,7 +401,7 @@ _GLOBAL(power9_idle_stop)
  * r13 - Contents of HSPRG0
  * cr3 - set to gt if waking up with partial/complete hypervisor state loss
  */
-_GLOBAL(pnv_restore_hyp_resource)
+pnv_restore_hyp_resource:
 BEGIN_FTR_SECTION
 	ld	r2,PACATOC(r13);
 	/*
@@ -436,7 +464,7 @@ END_FTR_SECTION_IFSET(CPU_FTR_ARCH_300)
  * cr3 - gt if waking up with partial/complete hypervisor state loss
  * cr4 - gt or eq if waking up from complete hypervisor state loss.
  */
-_GLOBAL(pnv_wakeup_tb_loss)
+pnv_wakeup_tb_loss:
 	ld	r1,PACAR1(r13)
 	/*
 	 * Before entering any idle state, the NVGPRs are saved in the stack
@@ -640,7 +668,8 @@ fastsleep_workaround_at_exit:
  * R3 here contains the value that will be returned to the caller
  * of power7_nap.
  */
-_GLOBAL(pnv_wakeup_loss)
+.global pnv_wakeup_loss
+pnv_wakeup_loss:
 	ld	r1,PACAR1(r13)
 BEGIN_FTR_SECTION
 	CHECK_HMI_INTERRUPT
@@ -660,7 +689,7 @@ END_FTR_SECTION_IFSET(CPU_FTR_HVMODE)
  * R3 here contains the value that will be returned to the caller
  * of power7_nap.
  */
-_GLOBAL(pnv_wakeup_noloss)
+pnv_wakeup_noloss:
 	lbz	r0,PACA_NAPSTATELOST(r13)
 	cmpwi	r0,0
 	bne	pnv_wakeup_loss
-- 
2.11.0