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| author | Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk> | 2022-06-22 11:53:04 +0100 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2022-07-13 16:58:57 +0200 |
| commit | f43c2b94cd1764ba0a47fc1f848681b0e89d4892 (patch) | |
| tree | 79d1dbb96bbd7cb619959d502ad66f3bbce63b96 /util/rcu.c | |
| parent | f358241029d6c3b8a4a292880cc6857eb520f4a8 (diff) | |
| download | qemu-f43c2b94cd1764ba0a47fc1f848681b0e89d4892.zip qemu-f43c2b94cd1764ba0a47fc1f848681b0e89d4892.tar.gz qemu-f43c2b94cd1764ba0a47fc1f848681b0e89d4892.tar.bz2 | |
scsi-disk: add SCSI_DISK_QUIRK_MODE_SENSE_ROM_USE_DBD quirk for Macintosh
During SCSI bus enumeration A/UX sends a MODE SENSE command to the CDROM with
the DBD bit unset and expects the response to include a block descriptor. As per
the latest SCSI documentation, QEMU currently force-disables the block
descriptor for CDROM devices but the A/UX driver expects the requested block
descriptor to be returned.
If the block descriptor is not returned in the response then A/UX becomes
confused, since the block descriptor returned in the MODE SENSE response is
used to generate a subsequent MODE SELECT command which is then invalid.
Add a new SCSI_DISK_QUIRK_MODE_SENSE_ROM_USE_DBD quirk to allow this behaviour
to be enabled as required. Note that an additional workaround is required for
the previous SCSI_DISK_QUIRK_MODE_PAGE_APPLE_VENDOR quirk which must never
return a block descriptor even though the DBD bit is left unset.
Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Message-Id: <20220622105314.802852-5-mark.cave-ayland@ilande.co.uk>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'util/rcu.c')
0 files changed, 0 insertions, 0 deletions