[RFC PATCH] ARM: Make a compile trustzone conditionally

[Olof Johansson]

On Sun, Jun 10, 2012 at 10:15 PM, Kyungmin Park <kmpark at infradead.org> wrote:
> From: Kyungmin Park <kyungmin.park at samsung.com>
>
> Some boards can use the trustzone but others can't use trustzone.
> However we need to build it simultaneously. To address this issue,
> introduce arm trustzone support and use it at each board files.
>
> e.g., In boot_secondary at mach-exynos/platsmp.c
>
>        __raw_writel(virt_to_phys(exynos4_secondary_startup),
>                CPU1_BOOT_REG);
>
>        if (trustzone_enabled()) {
>                /* Call Exynos specific smc call */
>                /* exynos_smc(SMC_CMD_CPU1BOOT, cpu, 0, 0); */
>        }
>
>        gic_raise_softirq(cpumask_of(cpu), 1);
>
>        if (pen_release == -1)

I would prefer to see this handled by using the smp_ops patchset that
Marc Zyngier has been posting instead, replacing the boot_secondary
function pointer during early boot depending on whether trustzone is
enabled or not.


-Olof