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tco: add trace events

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Add trace events to the PCH watchdog timer, it can be useful to see how
the guest is using it.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <1507816448-86665-1-git-send-email-pbonzini@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini 2017-10-12 15:54:08 +02:00
parent b7ecba0f6f
commit 6a24f34e5c
2 changed files with 13 additions and 2 deletions
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11
hw/acpi/tco.c
View file

@ -12,6 +12,7 @@
#include "hw/i386/ich9.h"
#include "hw/acpi/tco.h"
#include "trace.h"
//#define DEBUG
@ -41,8 +42,11 @@ enum {
static inline void tco_timer_reload(TCOIORegs *tr)
{
tr->expire_time = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) +
((int64_t)(tr->tco.tmr & TCO_TMR_MASK) * TCO_TICK_NSEC);
int ticks = tr->tco.tmr & TCO_TMR_MASK;
int64_t nsec = (int64_t)ticks * TCO_TICK_NSEC;
trace_tco_timer_reload(ticks, nsec / 1000000);
tr->expire_time = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL) + nsec;
timer_mod(tr->tco_timer, tr->expire_time);
}
@ -59,6 +63,9 @@ static void tco_timer_expired(void *opaque)
ICH9LPCState *lpc = container_of(pm, ICH9LPCState, pm);
uint32_t gcs = pci_get_long(lpc->chip_config + ICH9_CC_GCS);
trace_tco_timer_expired(tr->timeouts_no,
lpc->pin_strap.spkr_hi,
!!(gcs & ICH9_CC_GCS_NO_REBOOT));
tr->tco.rld = 0;
tr->tco.sts1 |= TCO_TIMEOUT;
if (++tr->timeouts_no == 2) {

4
hw/acpi/trace-events
View file

@ -30,3 +30,7 @@ cpuhp_acpi_ejecting_invalid_cpu(uint32_t idx) "0x%"PRIx32
cpuhp_acpi_ejecting_cpu(uint32_t idx) "0x%"PRIx32
cpuhp_acpi_write_ost_ev(uint32_t slot, uint32_t ev) "idx[0x%"PRIx32"] OST EVENT: 0x%"PRIx32
cpuhp_acpi_write_ost_status(uint32_t slot, uint32_t st) "idx[0x%"PRIx32"] OST STATUS: 0x%"PRIx32
# hw/acpi/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"