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>

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