powerpc/perf: factor out power8 __init_pmu code

Factor out the power8 pmu init functions to share with
power9. Monitor Mode Control Register S(MMCRS) and
Monitor Mode Control Register H(MMCRH) registers are
dropped in Power9. These registers are added to new
function which are included for power8 init.

Signed-off-by: Madhavan Srinivasan <maddy@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

arch/powerpc/kernel/cpu_setup_power.S

@@ -51,6 +51,7 @@ _GLOBAL(__setup_cpu_power8)
 	mflr	r11
 	bl	__init_FSCR
 	bl	__init_PMU
+	bl	__init_PMU_ISA207
 	bl	__init_hvmode_206
 	mtlr	r11
 	beqlr
@@ -62,6 +63,7 @@ _GLOBAL(__setup_cpu_power8)
 	bl	__init_HFSCR
 	bl	__init_tlb_power8
 	bl	__init_PMU_HV
+	bl	__init_PMU_HV_ISA207
 	mtlr	r11
 	blr
 
@@ -69,6 +71,7 @@ _GLOBAL(__restore_cpu_power8)
 	mflr	r11
 	bl	__init_FSCR
 	bl	__init_PMU
+	bl	__init_PMU_ISA207
 	mfmsr	r3
 	rldicl.	r0,r3,4,63
 	mtlr	r11
@@ -81,12 +84,14 @@ _GLOBAL(__restore_cpu_power8)
 	bl	__init_HFSCR
 	bl	__init_tlb_power8
 	bl	__init_PMU_HV
+	bl	__init_PMU_HV_ISA207
 	mtlr	r11
 	blr
 
 _GLOBAL(__setup_cpu_power9)
 	mflr	r11
 	bl	__init_FSCR
+	bl	__init_PMU
 	bl	__init_hvmode_206
 	mtlr	r11
 	beqlr
@@ -97,12 +102,14 @@ _GLOBAL(__setup_cpu_power9)
 	bl	__init_LPCR
 	bl	__init_HFSCR
 	bl	__init_tlb_power9
+	bl	__init_PMU_HV
 	mtlr	r11
 	blr
 
 _GLOBAL(__restore_cpu_power9)
 	mflr	r11
 	bl	__init_FSCR
+	bl	__init_PMU
 	mfmsr	r3
 	rldicl.	r0,r3,4,63
 	mtlr	r11
@@ -114,6 +121,7 @@ _GLOBAL(__restore_cpu_power9)
 	bl	__init_LPCR
 	bl	__init_HFSCR
 	bl	__init_tlb_power9
+	bl	__init_PMU_HV
 	mtlr	r11
 	blr
 
@@ -208,14 +216,22 @@ __init_tlb_power9:
 __init_PMU_HV:
 	li	r5,0
 	mtspr	SPRN_MMCRC,r5
+	blr
+
+__init_PMU_HV_ISA207:
+	li	r5,0
 	mtspr	SPRN_MMCRH,r5
 	blr
 
 __init_PMU:
 	li	r5,0
-	mtspr	SPRN_MMCRS,r5
 	mtspr	SPRN_MMCRA,r5
 	mtspr	SPRN_MMCR0,r5
 	mtspr	SPRN_MMCR1,r5
 	mtspr	SPRN_MMCR2,r5
 	blr
+
+__init_PMU_ISA207:
+	li	r5,0
+	mtspr	SPRN_MMCRS,r5
+	blr