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hw/acpi: add trace events for TCO watchdog register access 

These tracepoints aid in understanding and debugging the guest drivers
for the TCO watchdog.

Reviewed-by: Richard W.M. Jones <rjones@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Message-Id: <20221216125749.596075-2-berrange@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Daniel P. Berrangé 2022-12-16 07:57:45 -05:00 committed by Michael S. Tsirkin
parent c15dc499cc
commit 23d8e32499
2 changed files with 30 additions and 13 deletions
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41
hw/acpi/tco.c
View File

@ -86,6 +86,7 @@ static inline int can_start_tco_timer(TCOIORegs *tr)
static uint32_t tco_ioport_readw(TCOIORegs *tr, uint32_t addr)
{
uint16_t rld;
uint32_t ret = 0;
switch (addr) {
case TCO_RLD:
@ -96,35 +97,49 @@ static uint32_t tco_ioport_readw(TCOIORegs *tr, uint32_t addr)
} else {
rld = tr->tco.rld;
}
return rld;
ret = rld;
break;
case TCO_DAT_IN:
return tr->tco.din;
ret = tr->tco.din;
break;
case TCO_DAT_OUT:
return tr->tco.dout;
ret = tr->tco.dout;
break;
case TCO1_STS:
return tr->tco.sts1;
ret = tr->tco.sts1;
break;
case TCO2_STS:
return tr->tco.sts2;
ret = tr->tco.sts2;
break;
case TCO1_CNT:
return tr->tco.cnt1;
ret = tr->tco.cnt1;
break;
case TCO2_CNT:
return tr->tco.cnt2;
ret = tr->tco.cnt2;
break;
case TCO_MESSAGE1:
return tr->tco.msg1;
ret = tr->tco.msg1;
break;
case TCO_MESSAGE2:
return tr->tco.msg2;
ret = tr->tco.msg2;
break;
case TCO_WDCNT:
return tr->tco.wdcnt;
ret = tr->tco.wdcnt;
break;
case TCO_TMR:
return tr->tco.tmr;
ret = tr->tco.tmr;
break;
case SW_IRQ_GEN:
return tr->sw_irq_gen;
ret = tr->sw_irq_gen;
break;
}
return 0;
trace_tco_io_read(addr, ret);
return ret;
}
static void tco_ioport_writew(TCOIORegs *tr, uint32_t addr, uint32_t val)
{
trace_tco_io_write(addr, val);
switch (addr) {
case TCO_RLD:
tr->timeouts_no = 0;

2
hw/acpi/trace-events
View File

@ -55,6 +55,8 @@ piix4_gpe_writeb(uint64_t addr, unsigned width, uint64_t val) "addr: 0x%" PRIx64
# tco.c
tco_timer_reload(int ticks, int msec) "ticks=%d (%d ms)"
tco_timer_expired(int timeouts_no, bool strap, bool no_reboot) "timeouts_no=%d no_reboot=%d/%d"
tco_io_write(uint64_t addr, uint32_t val) "addr=0x%" PRIx64 " val=0x%" PRIx32
tco_io_read(uint64_t addr, uint32_t val) "addr=0x%" PRIx64 " val=0x%" PRIx32
# erst.c
acpi_erst_reg_write(uint64_t addr, uint64_t val, unsigned size) "addr: 0x%04" PRIx64 " <== 0x%016" PRIx64 " (size: %u)"