提交 · 21174c34b6b9ace9ad82e0deb13be752d28a5907 · openeuler / qemu

04 12月, 2009 1 次提交

由 Jan Kiszka 提交于 12月 02, 2009

Seeking on vmstate save/load does not work if the underlying file is a
stream. We could try to make all QEMUFile* forward-seek-aware, but first
attempts in this direction indicated that it's saner to convert the few
qemu_fseek-on-vmstates users to plain reads/writes.

This fixes various subtle vmstate corruptions where unused fields were
involved.
Signed-off-by: NJan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: NJuan Quintela <quintela@redhat.com>
Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>

21174c34

03 12月, 2009 39 次提交

lsi53c895a: Implement IRQ on reselection · e560125e

由 Laszlo Ast 提交于 11月 19, 2009

The critical part of this change is how to deal with simultaneaous
generation of interrupts. The only (normal) case when this happens in
the emulation is near simultaneous reselection + selection. If selection
comes first, there is no problem, since the target attempting
reselection loses the arbitration (in the emulation it only means that
the reselect function will not be started). In the worst case the host
adapter is reselected, but the device driver already started a
selection, so we jump to the alternative address to handle the
situation.

The SCRIPTS code can trigger another interrupt to notify the driver that
the new task has to be postponed. I suppose that on real hardware there
is enough time after the reselection interrupt to set the SIP bit before
the next interrupt comes, so it would result in 2 stacked interrupts (a
SCSI and a DMA one). However, in the emulation there is no interrupt
stacking, so there is a good chance that the 2 interrupts will get to
the interrupt handler at the same time.

Nevertheless, it should not make a big difference in interrupt handling,
since in both cases both interrupts have to be fetched first, and after
that the new task (that failed during the selection phase) has to be
prepared/reset for a later restart, and the reconnected device has to be
serviced.

The changes do not modify the host adapter's behavior if this interrupt
is not enabled.

See also LSI53C895A technical manual, SCID and SIEN0.
Signed-off-by: NLaszlo Ast <laszlo.ast@siemens-enterprise.com>
Signed-off-by: NJan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>

e560125e

lsi53c895a: Use alternative address when already reselected · 38f5b2b8

由 Laszlo Ast 提交于 11月 19, 2009

See SCRIPTS, 3.2.17 SELECT.
Signed-off-by: NLaszlo Ast <laszlo.ast@siemens-enterprise.com>
Signed-off-by: NJan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>

38f5b2b8

lsi53c895a: Fix SDID in SELECT ID command · 07a1bea8

由 Laszlo Ast 提交于 11月 19, 2009

See SCRIPTS Programming Guide, 3.2.17 SELECT.
Signed-off-by: NLaszlo Ast <laszlo.ast@siemens-enterprise.com>
Signed-off-by: NJan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>

07a1bea8

lsi53c895a: Fix message code of DISCONNECT · 77203ea0

由 Laszlo Ast 提交于 11月 19, 2009

See SCSI-2, 6.5 Message system description/message codes.
Signed-off-by: NLaszlo Ast <laszlo.ast@siemens-enterprise.com>
Signed-off-by: NJan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>

77203ea0

lsi53c895a: Add support for LSI53C700 Family Compatibility bit · cc9f28bc

由 Laszlo Ast 提交于 11月 19, 2009

Signed-off-by: NLaszlo Ast <laszlo.ast@siemens-enterprise.com>
Signed-off-by: NJan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>

cc9f28bc

lsi53c895a: Whitespace and typo fixes · a15fdf86

由 Laszlo Ast 提交于 11月 19, 2009

Signed-off-by: NLaszlo Ast <laszlo.ast@siemens-enterprise.com>
Signed-off-by: NJan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>

a15fdf86

scsi: add read/write 16 commands. · bd536cf3