[PATCH 0/2] xen/arm: Couple of bug fixes when decompressing kernels

[Julien Grall <julien@xxxxxxx>]

From: Julien Grall <jgrall@xxxxxxxxxx>

Hi all,

The main goal of this series is to address the bug report [1]. It is not
possible

While testing the series, I also noticed that it is not possible to
re-use the same compressed kernel for multiple domains as the module
will be overwritten during the first decompression.

I am still a bit undecided how to fix it. We can either create a new
module for the uncompressed kernel and link with the compressed kernel.
Or we could decompress everytime.

One inconvenience to kernel to only decompress once is we have to keep
it until all the domains have booted. This may means a lot of memory to be
wasted just for keeping the uncompressed kernel (one my setup, it takes
~3 times more space).

Any opinions on how to approach it?

Cheers,

[1] https://lists.xenproject.org/archives/html/xen-users/2021-02/msg00027.html

Julien Grall (2):
  xen/arm: kernel: Propagate the error if we fail to decompress the
    kernel
  xen/gunzip: Allow perform_gunzip() to be called multiple times

 xen/arch/arm/kernel.c | 8 +++++++-
 xen/common/gunzip.c   | 5 +++++
 xen/common/inflate.c  | 6 ++++++
 3 files changed, 18 insertions(+), 1 deletion(-)

-- 
2.17.1