Commit 2a3563b0 authored Mar 05, 2013 by Michael Neuling Committed by Michael Ellerman Apr 18, 2013

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>

parent 04b418c9

arch/powerpc/kernel/cpu_setup_power.S

+8 −0

Original line number	Diff line number	Diff line
		@@ -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