Re: [PATCH 2/2] x86/ACPI: Set swiotlb area according to the number of lapic entry in MADT

[Tianyu Lan]

On 6/29/2022 10:04 PM, Christoph Hellwig wrote:
> On Mon, Jun 27, 2022 at 11:31:50AM -0400, Tianyu Lan wrote:
> > From: Tianyu Lan <Tianyu.Lan@xxxxxxxxxxxxx>
> >
> > When initialize swiotlb bounce buffer, smp_init() has not been
> > called and cpu number can not be got from num_online_cpus().
> > Use the number of lapic entry to set swiotlb area number and
> > keep swiotlb area number equal to cpu number on the x86 platform.
>
> Can we reorder that initialization?  Because I really hate having
> to have an arch hook in every architecture.

How about using "flags" parameter of swiotlb_init() to pass area number
or add new parameter for area number?

I just reposted patch 1 since there is just some coding style issue and 
area number may also set via swiotlb kernel parameter. We still need 
figure out a good solution to pass area number from architecture code.