Commit cbfc5619 authored by Vladimir Murzin's avatar Vladimir Murzin Committed by Russell King
Browse files

ARM: 8784/1: NOMMU: Allow enter in Hyp mode 



ARMv8R adds support for virtualisation extension (with some deviation
from v8A). With this patch hyp-unaware boot code can offload to kernel
setting up HYP stuff in a sane state.

Signed-off-by: default avatarVladimir Murzin <vladimir.murzin@arm.com>
Signed-off-by: default avatarRussell King <rmk+kernel@armlinux.org.uk>
parent c803ce3f

arch/arm/kernel/head-nommu.S

+10 −2
Original line number Diff line number Diff line
@@ -53,7 +53,11 @@ ENTRY(stext) 
 THUMB(1:			)

#endif



	setmode	PSR_F_BIT | PSR_I_BIT | SVC_MODE, r9 @ ensure svc mode

#ifdef CONFIG_ARM_VIRT_EXT

	bl	__hyp_stub_install

#endif

	@ ensure svc mode and all interrupts masked

	safe_svcmode_maskall r9

						@ and irqs disabled

#if defined(CONFIG_CPU_CP15)

	mrc	p15, 0, r9, c0, c0		@ get processor id
@@ -89,7 +93,11 @@ ENTRY(secondary_startup) 
	 * the processor type - there is no need to check the machine type

	 * as it has already been validated by the primary processor.

	 */

	setmode	PSR_F_BIT | PSR_I_BIT | SVC_MODE, r9

#ifdef CONFIG_ARM_VIRT_EXT

	bl	__hyp_stub_install_secondary

#endif

	safe_svcmode_maskall r9



#ifndef CONFIG_CPU_CP15

	ldr	r9, =CONFIG_PROCESSOR_ID

#else

arch/arm/mm/Kconfig

+0 −1
Original line number Diff line number Diff line
@@ -702,7 +702,6 @@ config ARM_THUMBEE 


config ARM_VIRT_EXT

	bool

	depends on MMU

	default y if CPU_V7

	help

	  Enable the kernel to make use of the ARM Virtualization

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