From mboxrd@z Thu Jan 1 00:00:00 1970 From: will.deacon@arm.com (Will Deacon) Date: Fri, 11 Jan 2013 15:34:17 +0000 Subject: [PATCH 6/6] ARM: virt: hide CONFIG_ARM_VIRT_EXT from user In-Reply-To: <1357918457-20469-1-git-send-email-will.deacon@arm.com> References: <1357918457-20469-1-git-send-email-will.deacon@arm.com> Message-ID: <1357918457-20469-7-git-send-email-will.deacon@arm.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org ARM_VIRT_EXT is a property of CPU_V7, but does not adversely affect other CPUs that can be built into the same kernel image (i.e. ARMv6+). This patch defaults ARM_VIRT_EXT to y if CPU_V7, allowing hypervisors such as KVM to make better use of the option and being able to rely on hyp-mode boot support. Signed-off-by: Will Deacon --- arch/arm/mm/Kconfig | 10 +++------- 1 file changed, 3 insertions(+), 7 deletions(-) diff --git a/arch/arm/mm/Kconfig b/arch/arm/mm/Kconfig index 3fd629d..025d173 100644 --- a/arch/arm/mm/Kconfig +++ b/arch/arm/mm/Kconfig @@ -629,8 +629,9 @@ config ARM_THUMBEE make use of it. Say N for code that can run on CPUs without ThumbEE. config ARM_VIRT_EXT - bool "Native support for the ARM Virtualization Extensions" - depends on MMU && CPU_V7 + bool + depends on MMU + default y if CPU_V7 help Enable the kernel to make use of the ARM Virtualization Extensions to install hypervisors without run-time firmware @@ -640,11 +641,6 @@ config ARM_VIRT_EXT use of this feature. Refer to Documentation/arm/Booting for details. - It is safe to enable this option even if the kernel may not be - booted in HYP mode, may not have support for the - virtualization extensions, or may be booted with a - non-compliant bootloader. - config SWP_EMULATE bool "Emulate SWP/SWPB instructions" depends on !CPU_USE_DOMAINS && CPU_V7 -- 1.8.0