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....@microsoft.com>

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.

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