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powerpc: Setup in HFSCR for POWER8 

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 <mikey@neuling.org>
Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
This commit is contained in:
Michael Neuling 2013-03-05 17:35:24 +00:00 committed by Michael Ellerman
parent 04b418c97f
commit 2a3563b023
1 changed files with 8 additions and 0 deletions
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8
arch/powerpc/kernel/cpu_setup_power.S
View File

@ -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