On Tue, Jun 27, 2023 at 02:12:36AM +1200, Kai Huang wrote:
> cpu = get_cpu();
> - sret = __seamcall(fn, rcx, rdx, r8, r9, out);
> +
> + /*
> + * Certain SEAMCALL leaf functions may return error due to
> + * running out of entropy, in which case the SEAMCALL should
> + * be retried. Handle this in SEAMCALL common function.
> + *
> + * Mimic rdrand_long() retry behavior.
Yeah, except that doesn't have preemption disabled.. you do.
> + */
> + do {
> + sret = __seamcall(fn, rcx, rdx, r8, r9, out);
> + } while (sret == TDX_RND_NO_ENTROPY && --retry);
> +
> put_cpu();
