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| author | Vladimir Murzin <vladimir.murzin@arm.com> | 2018-07-23 11:37:09 +0300 |
|---|---|---|
| committer | Russell King <rmk+kernel@armlinux.org.uk> | 2018-07-30 13:45:52 +0300 |
| commit | cbfc5619e0cc8dcdf3020e27426eec362307cc14 (patch) | |
| tree | 0d136c75e968fac26815b27920fc400b679931a0 | |
| parent | c803ce3f18bd93b3b4a15d1da0c5b5ebc60e0b85 (diff) | |
| download | linux-cbfc5619e0cc8dcdf3020e27426eec362307cc14.tar.xz | |
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: Vladimir Murzin <vladimir.murzin@arm.com>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
| -rw-r--r-- | arch/arm/kernel/head-nommu.S | 12 | ||||
| -rw-r--r-- | arch/arm/mm/Kconfig | 1 |
2 files changed, 10 insertions, 3 deletions
diff --git a/arch/arm/kernel/head-nommu.S b/arch/arm/kernel/head-nommu.S index dd546d65a383..724734039492 100644 --- a/arch/arm/kernel/head-nommu.S +++ b/arch/arm/kernel/head-nommu.S @@ -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 diff --git a/arch/arm/mm/Kconfig b/arch/arm/mm/Kconfig index 96a7b6cf459b..b169e580bf82 100644 --- a/arch/arm/mm/Kconfig +++ b/arch/arm/mm/Kconfig @@ -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 |