On Thu, Jun 11, 2026 at 05:19:26PM +0800, Herbert Xu wrote:
> On Thu, Jun 11, 2026 at 05:10:32AM -0400, Michael S. Tsirkin wrote:
> >
> > data_avail is under hypervisor control
> >
> > avail = min_t(unsigned int, vi->data_avail, sizeof(vi->data));
> > if (vi->data_idx >= avail) {
> > vi->data_idx = 0;
> >
> > and maybe this can speculate past the if?
> >
> > I agree, this is all speculation )
>
> Either it is vulnerable to Spectre, or it isn't. Adding nospec
> markers when you're not sure is cargo cult programming.
AKA defence is depth programming)
Alright we can drop this. No biggie.
--
MST
