diff options
| 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 /include/hw/scsi | |
| parent | f358241029d6c3b8a4a292880cc6857eb520f4a8 (diff) | |
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 'include/hw/scsi')
| -rw-r--r-- | include/hw/scsi/scsi.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/hw/scsi/scsi.h b/include/hw/scsi/scsi.h index e090ea1b40..845d05722b 100644 --- a/include/hw/scsi/scsi.h +++ b/include/hw/scsi/scsi.h @@ -228,5 +228,6 @@ extern const SCSIReqOps scsi_generic_req_ops; /* scsi-disk.c */ #define SCSI_DISK_QUIRK_MODE_PAGE_APPLE_VENDOR 0 +#define SCSI_DISK_QUIRK_MODE_SENSE_ROM_USE_DBD 1 #endif |