[U-Boot] [PATCH] arm64: add missing gic_init_secure_percpu for non multi-entry

[Stephen Warren]

On 04/15/2016 05:41 AM, Masahiro Yamada wrote:
> Per-CPU initialization of GIC is necessary even when
> CONFIG_ARMV8_MULTIENTRY is undefined.

> diff --git a/arch/arm/cpu/armv8/start.S b/arch/arm/cpu/armv8/start.S

> @@ -208,6 +208,8 @@ WEAK(lowlevel_init)
>   	 */
>   	ldr	x0, =GICD_BASE
>   	bl	gic_init_secure
> +	ldr	x0, =GICR_BASE
> +	bl	gic_init_secure_percpu
>   #endif
>   #else /* CONFIG_ARMV8_MULTIENTRY is set */
>   #if defined(CONFIG_GICV2) || defined(CONFIG_GICV3)

The #else branch currently there does something quite different for 
GICV2 and GICV3. The code you added above seems to be identical to that 
code's GIVC3 case and ignore GICV2. I assume that's a bug?

If so, and the fix is to make the non-multientry code do the exact same 
call to gic_init_secure_percpu that the multientry code does, I would 
suggest unifying the two branches, replacing that entire top-level 
#if/#else block with:

#if defined(CONFIG_GICV2) || defined(CONFIG_GICV3)
#ifdef CONFIG_ARMV8_MULTIENTRY
	branch_if_slave x0, 1f
#endif
	ldr	x0, =GICD_BASE
	bl	gic_init_secure
1:
#if defined(CONFIG_GICV3)
	ldr	x0, =GICR_BASE
	bl	gic_init_secure_percpu
#elif defined(CONFIG_GICV2)
	ldr	x0, =GICD_BASE
	ldr	x1, =GICC_BASE
	bl	gic_init_secure_percpu
#endif
#endif

At least, that's what I think looking at the code with basically zero 
understanding of what initialization the GIC actually needs...