Setup the HFSCR (Hypervisor Facility Status and Control Register) for POWER8
when running HV=1. The HFSCR is the same as the FSCR except it's for
hypervisors. It controls the available of various facilities in OS and
userspace levels. It also indicates the cause of a hypervisor facility
unavailable interrupt (although we are not using this here).
This patch sets the facilities Linux knows about incase the firmware doesn't.
Signed-off-by: Michael Neuling <mi...@neuling.org>
---
arch/powerpc/kernel/cpu_setup_power.S | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/arch/powerpc/kernel/cpu_setup_power.S
b/arch/powerpc/kernel/cpu_setup_power.S
index ea847ab..2e6ad11 100644
--- a/arch/powerpc/kernel/cpu_setup_power.S
+++ b/arch/powerpc/kernel/cpu_setup_power.S
@@ -57,6 +57,7 @@ _GLOBAL(__setup_cpu_power8)
mfspr r3,SPRN_LPCR
oris r3, r3, LPCR_AIL_3@h
bl __init_LPCR
+ bl __init_HFSCR
bl __init_TLB
mtlr r11
blr
@@ -72,6 +73,7 @@ _GLOBAL(__restore_cpu_power8)
mfspr r3,SPRN_LPCR
oris r3, r3, LPCR_AIL_3@h
bl __init_LPCR
+ bl __init_HFSCR
bl __init_TLB
mtlr r11
blr
@@ -120,6 +122,12 @@ __init_FSCR:
mtspr SPRN_FSCR,r3
blr
+__init_HFSCR:
+ mfspr r3,SPRN_HFSCR
+ ori r3,r3,HFSCR_TAR|HFSCR_TM|HFSCR_DSCR|HFSCR_VECVSX|HFSCR_FP
+ mtspr SPRN_HFSCR,r3
+ blr
+
__init_TLB:
/* Clear the TLB */
li r6,128
--
1.7.10.4
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