tree 4e0517bd29501149381e7f48b116864d4d7308ac
parent e9a72359a54978f7364f6486973cea50ceb52173
author Paolo Bonzini <pbonzini@redhat.com> 1375014954 +0200
committer Anthony Liguori <aliguori@us.ibm.com> 1375897695 -0500

fw_cfg: the I/O port variant expects little-endian

The I/O port variant of fw_cfg is used by sparc64, which is a big-endian machine.
Firmware swaps bytes before sending them to fw_cfg, so we need to unswap them in
the device.

This is only used on sparc64 and on (little-endian) x86, so it does not affect
any other target.  32-bit Sparc and PPC all use memory-mapped fw_cfg.

Reported-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
Tested-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Message-id: 1375014954-31916-2-git-send-email-pbonzini@redhat.com
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>