Hey David,
On Monday 09 Nov 2020 at 11:32:26 (+0000), David Brazdil wrote:
> Add helper macro for computing the PA of a kernel symbol in nVHE hyp
> code. This will be useful for computing the PA of a PSCI CPU_ON entry
> point.
>
> Signed-off-by: David Brazdil <dbrazdil@xxxxxxxxxx>
> ---
> arch/arm64/kvm/hyp/nvhe/psci.c | 10 ++++++++++
> 1 file changed, 10 insertions(+)
>
> diff --git a/arch/arm64/kvm/hyp/nvhe/psci.c b/arch/arm64/kvm/hyp/nvhe/psci.c
> index b0b5df590ba5..7510b9e174e9 100644
> --- a/arch/arm64/kvm/hyp/nvhe/psci.c
> +++ b/arch/arm64/kvm/hyp/nvhe/psci.c
> @@ -20,6 +20,16 @@ s64 hyp_physvirt_offset;
>
> #define __hyp_pa(x) ((phys_addr_t)((x)) + hyp_physvirt_offset)
>
> +#define __hyp_pa_symbol(sym) \
> + ({ \
> + extern char sym[]; \
> + unsigned long kern_va; \
> + \
> + asm volatile("ldr %0, =%1" : "=r" (kern_va) \
> + : "S" (sym)); \
> + kern_va - kimage_voffset; \
> + })
> +
Could this be simplified to __hyp_pa(hyp_symbol_addr(sym))? That would
avoid the dependency on kimage_voffset.
Thanks,
Quentin
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