diff options
| author | Sven Schnelle <svens@stackframe.org> | 2024-02-29 21:44:07 +0100 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2024-03-08 15:51:21 +0100 |
| commit | 9876359990dd4c8a48de65cf5e1c3d13e96a7f4e (patch) | |
| tree | 1f7fd2a3d95a0aabe59f28872a1219d401fa7772 /hw/scsi/trace-events | |
| parent | 8f6330a807f2642dc2a3cdf33347aa28a4c00a87 (diff) | |
hw/scsi/lsi53c895a: add timer to scripts processing
HP-UX 10.20 seems to make the lsi53c895a spinning on a memory location
under certain circumstances. As the SCSI controller and CPU are not
running at the same time this loop will never finish. After some
time, the check loop interrupts with a unexpected device disconnect.
This works, but is slow because the kernel resets the scsi controller.
Instead of signaling UDC, start a timer and exit the loop. Until the
timer fires, the CPU can process instructions which might changes the
memory location.
The limit of instructions is also reduced because scripts running on
the SCSI processor are usually very short. This keeps the time until
the loop is exit short.
Suggested-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Sven Schnelle <svens@stackframe.org>
Message-ID: <20240229204407.1699260-1-svens@stackframe.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'hw/scsi/trace-events')
| -rw-r--r-- | hw/scsi/trace-events | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/hw/scsi/trace-events b/hw/scsi/trace-events index d72f741ed8..f0f2a98c2e 100644 --- a/hw/scsi/trace-events +++ b/hw/scsi/trace-events @@ -302,6 +302,8 @@ lsi_execute_script_stop(void) "SCRIPTS execution stopped" lsi_awoken(void) "Woken by SIGP" lsi_reg_read(const char *name, int offset, uint8_t ret) "Read reg %s 0x%x = 0x%02x" lsi_reg_write(const char *name, int offset, uint8_t val) "Write reg %s 0x%x = 0x%02x" +lsi_scripts_timer_triggered(void) "SCRIPTS timer triggered" +lsi_scripts_timer_start(void) "SCRIPTS timer started" # virtio-scsi.c virtio_scsi_cmd_req(int lun, uint32_t tag, uint8_t cmd) "virtio_scsi_cmd_req lun=%u tag=0x%x cmd=0x%x" |