commit d139fe9ad8a27bcc50b4ead77d2f97d191a0e95e
author Thomas Huth <thuth@redhat.com> Tue May 16 11:05:56 2023 +0200
committer Thomas Huth <thuth@redhat.com> Fri May 26 09:37:04 2023 +0200
tree c2a87e48992222fdc64644d3dfc9af2f16313296
parent a37531f2381c4e294e48b1417089474128388b44

lsi53c895a: disable reentrancy detection for MMIO region, too

While trying to use a SCSI disk on the LSI controller with an
older version of Fedora (25), I'm getting:

 qemu: warning: Blocked re-entrant IO on MemoryRegion: lsi-mmio at addr: 0x34

and the SCSI controller is not usable. Seems like we have to
disable the reentrancy checker for the MMIO region, too, to
get this working again.

The problem could be reproduced it like this:

./qemu-system-x86_64 -accel kvm -m 2G -machine q35 \
 -device lsi53c810,id=lsi1 -device scsi-hd,drive=d0 \
 -drive if=none,id=d0,file=.../somedisk.qcow2 \
 -cdrom Fedora-Everything-netinst-i386-25-1.3.iso

Where somedisk.qcow2 is an image that contains already some partitions
and file systems.

In the boot menu of Fedora, go to
"Troubleshooting" -> "Rescue a Fedora system" -> "3) Skip to shell"

Then check "dmesg | grep -i 53c" for failure messages, and try to mount
a partition from somedisk.qcow2.

Message-Id: <20230516090556.553813-1-thuth@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>