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| author | Russell King <rmk+kernel@armlinux.org.uk> | 2017-04-03 21:37:46 +0300 |
|---|---|---|
| committer | Christoffer Dall <cdall@linaro.org> | 2017-04-09 17:49:24 +0300 |
| commit | 9da5ac236de6ab2189c999eb9ddddeef1431ab68 (patch) | |
| tree | 586a9df656c6c6e1d5c2c341cc4204c5cb9f3d5c /arch/arm/include | |
| parent | 1342337bc80a5bfb9aa83574da9fb2e22cc64121 (diff) | |
| download | linux-9da5ac236de6ab2189c999eb9ddddeef1431ab68.tar.xz | |
ARM: soft-reboot into same mode that we entered the kernel
When we soft-reboot (eg, kexec) from one kernel into the next, we need
to ensure that we enter the new kernel in the same processor mode as
when we were entered, so that (eg) the new kernel can install its own
hypervisor - the old kernel's hypervisor will have been overwritten.
In order to do this, we need to pass a flag to cpu_reset() so it knows
what to do, and we need to modify the kernel's own hypervisor stub to
allow it to handle a soft-reboot.
As we are always guaranteed to install our own hypervisor if we're
entered in HYP32 mode, and KVM will have moved itself out of the way
on kexec/normal reboot, we can assume that our hypervisor is in place
when we want to kexec, so changing our hypervisor API should not be a
problem.
Tested-by: Keerthy <j-keerthy@ti.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Christoffer Dall <cdall@linaro.org>
Diffstat (limited to 'arch/arm/include')
| -rw-r--r-- | arch/arm/include/asm/proc-fns.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/arm/include/asm/proc-fns.h b/arch/arm/include/asm/proc-fns.h index 8877ad5ffe10..f2e1af45bd6f 100644 --- a/arch/arm/include/asm/proc-fns.h +++ b/arch/arm/include/asm/proc-fns.h @@ -43,7 +43,7 @@ extern struct processor { /* * Special stuff for a reset */ - void (*reset)(unsigned long addr) __attribute__((noreturn)); + void (*reset)(unsigned long addr, bool hvc) __attribute__((noreturn)); /* * Idle the processor */ @@ -88,7 +88,7 @@ extern void cpu_set_pte_ext(pte_t *ptep, pte_t pte); #else extern void cpu_set_pte_ext(pte_t *ptep, pte_t pte, unsigned int ext); #endif -extern void cpu_reset(unsigned long addr) __attribute__((noreturn)); +extern void cpu_reset(unsigned long addr, bool hvc) __attribute__((noreturn)); /* These three are private to arch/arm/kernel/suspend.c */ extern void cpu_do_suspend(void *); |