On Tue, Jun 27, 2023 at 02:12:37AM +1200, Kai Huang wrote:
> +static int try_init_module_global(void)
> +{
> + unsigned long flags;
> + int ret;
> +
> + /*
> + * The TDX module global initialization only needs to be done
> + * once on any cpu.
> + */
> + raw_spin_lock_irqsave(&tdx_global_init_lock, flags);
> +
> + if (tdx_global_initialized) {
> + ret = 0;
> + goto out;
> + }
> +
> + /* All '0's are just unused parameters. */
> + ret = seamcall(TDH_SYS_INIT, 0, 0, 0, 0, NULL, NULL);
> + if (!ret)
> + tdx_global_initialized = true;
> +out:
> + raw_spin_unlock_irqrestore(&tdx_global_init_lock, flags);
> +
> + return ret;
> +}
How long does that TDX_SYS_INIT take and why is a raw_spinlock with IRQs
disabled the right way to serialize this?
