On Fri, Mar 18, 2016 at 05:25:59PM +0000, Marc Zyngier wrote:
> When running with VHE, there is no need to translate kernel pointers
> to the EL2 memory space, since we're already there (and we have a much
> saner memory map to start with).
>
> Unfortunately, kvm_ksym_ref is getting in the way, and the first
> call into the "hypervisor" section is going to end up in fireworks,
> since we're now branching into nowhereland. Meh.
>
> A potential solution is to test if VHE is engaged or not, and only
> perform the translation in the negative case. With this in place,
> VHE is able to run again.
>
> Signed-off-by: Marc Zyngier <marc.zyngier@xxxxxxx>
> ---
> arch/arm64/include/asm/kvm_asm.h | 8 +++++++-
> 1 file changed, 7 insertions(+), 1 deletion(-)
>
> diff --git a/arch/arm64/include/asm/kvm_asm.h b/arch/arm64/include/asm/kvm_asm.h
> index 226f49d..282f907 100644
> --- a/arch/arm64/include/asm/kvm_asm.h
> +++ b/arch/arm64/include/asm/kvm_asm.h
> @@ -26,7 +26,13 @@
> #define KVM_ARM64_DEBUG_DIRTY_SHIFT 0
> #define KVM_ARM64_DEBUG_DIRTY (1 << KVM_ARM64_DEBUG_DIRTY_SHIFT)
>
> -#define kvm_ksym_ref(sym) phys_to_virt((u64)&sym - kimage_voffset)
> +#define kvm_ksym_ref(sym) \
> + ({ \
> + void *val = sym; \
Should we not use &sym, for consistency and just in case we ever pass
something other than a function.
> + if (!is_kernel_in_hyp_mode()) \
> + val = phys_to_virt((u64)&sym - kimage_voffset); \
> + val; \
> + })
Otherwise:
Acked-by: Catalin Marinas <catalin.marinas@xxxxxxx>
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