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powerpc: Initialise PMU related regs on Power8

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For both HV and guest kernels, intialise PMU regs to something sane.

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Acked-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Michael Ellerman
2013-04-25 19:28:22 +00:00
committed by Benjamin Herrenschmidt
parent 959c9bdd58
commit 240686c136
2 changed files with 26 additions and 1 deletions
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21
arch/powerpc/kernel/cpu_setup_power.S
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@@ -49,6 +49,7 @@ _GLOBAL(__restore_cpu_power7)
_GLOBAL(__setup_cpu_power8)
mflr r11
bl __init_FSCR
bl __init_PMU
bl __init_hvmode_206
mtlr r11
beqlr
@@ -59,12 +60,14 @@ _GLOBAL(__setup_cpu_power8)
bl __init_LPCR
bl __init_HFSCR
bl __init_TLB
bl __init_PMU_HV
mtlr r11
blr
_GLOBAL(__restore_cpu_power8)
mflr r11
bl __init_FSCR
bl __init_PMU
mfmsr r3
rldicl. r0,r3,4,63
mtlr r11
@@ -76,6 +79,7 @@ _GLOBAL(__restore_cpu_power8)
bl __init_LPCR
bl __init_HFSCR
bl __init_TLB
bl __init_PMU_HV
mtlr r11
blr
@@ -125,7 +129,7 @@ __init_FSCR:
__init_HFSCR:
mfspr r3,SPRN_HFSCR
ori r3,r3,HFSCR_TAR|HFSCR_TM|HFSCR_DSCR|HFSCR_VECVSX|HFSCR_FP
ori r3,r3,HFSCR_TAR|HFSCR_TM|HFSCR_DSCR|HFSCR_VECVSX|HFSCR_FP|HFSCR_PM
mtspr SPRN_HFSCR,r3
blr
@@ -140,3 +144,18 @@ __init_TLB:
bdnz 2b
ptesync
1: blr
__init_PMU_HV:
li r5,0
mtspr SPRN_MMCRC,r5
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