Xen project Mailing List

Re: zstd compressed kernels

To: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>

From: Michael Young <m.a.young@xxxxxxxxxxxx>

Date: Mon, 23 Nov 2020 23:01:09 +0000 (GMT)

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Cc: xen-devel@xxxxxxxxxxxxxxxxxxxx

Delivery-date: Tue, 24 Nov 2020 05:37:03 +0000

List-id: Xen developer discussion <xen-devel.lists.xenproject.org>

On Tue, 17 Nov 2020, Andrew Cooper wrote:

If you're willing to have a go:

For dom0 support, port Linux's decompressor into xen/common/ and plumb
it into xen/common/decompress.c

For domU's, tools/libs/guest/xg_dom_bzimageloader.c and
xc_dom_probe_bzimage_kernel()

Here is what I have so far. It works for me with a dom0 boot, though only

after I reduced the the setting of the maximum decompressed size (out_len)

from LONG_MAX to INT_MAX. The patches aren't intended to be final, and I

suspect there may need to be adjustments for guest support.

Michael Young

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