include/hw/ppc/spapr.h | 25 +++- hw/ppc/spapr.c | 4 + hw/watchdog/spapr_watchdog.c | 274 +++++++++++++++++++++++++++++++++++ hw/watchdog/meson.build | 1 + hw/watchdog/trace-events | 7 + 5 files changed, 310 insertions(+), 1 deletion(-) create mode 100644 hw/watchdog/spapr_watchdog.c
The new PAPR 2.12 defines a watchdog facility managed via the new
H_WATCHDOG hypercall.
This adds H_WATCHDOG support which a proposed driver for pseries uses:
https://patchwork.ozlabs.org/project/linuxppc-dev/list/?series=303120
This was tested by running QEMU with a debug kernel and command line:
-append \
"pseries-wdt.timeout=60 pseries-wdt.nowayout=1 pseries-wdt.action=2"
and running "echo V > /dev/watchdog0" inside the VM.
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
---
Changes:
v3:
* removed @num from SpaprWatchdog
* reworked to use standard FIELD_EX/FIELD_OP
* expire_time is a property now
* added handling of leaveOtherWatchdogsRunningOnTimeout
v2:
* QOM'ed timers, "action" and "expire" are available via QMP
* removed @timeout from SpaprWatchdog
* moved the driver to hw/watchdog
* fixed error handling in the hcall handler
* used new SETFIELD/GETFIELD
---
include/hw/ppc/spapr.h | 25 +++-
hw/ppc/spapr.c | 4 +
hw/watchdog/spapr_watchdog.c | 274 +++++++++++++++++++++++++++++++++++
hw/watchdog/meson.build | 1 +
hw/watchdog/trace-events | 7 +
5 files changed, 310 insertions(+), 1 deletion(-)
create mode 100644 hw/watchdog/spapr_watchdog.c
diff --git a/include/hw/ppc/spapr.h b/include/hw/ppc/spapr.h
index 072dda2c7265..891be79604fe 100644
--- a/include/hw/ppc/spapr.h
+++ b/include/hw/ppc/spapr.h
@@ -164,6 +164,21 @@ struct SpaprMachineClass {
SpaprIrq *irq;
};
+#define WDT_MAX_WATCHDOGS 4 /* Maximum number of watchdog devices */
+
+#define TYPE_SPAPR_WDT "spapr-wdt"
+OBJECT_DECLARE_SIMPLE_TYPE(SpaprWatchdog, SPAPR_WDT)
+
+typedef struct SpaprWatchdog {
+ /*< private >*/
+ DeviceState parent_obj;
+ /*< public >*/
+
+ QEMUTimer timer;
+ uint8_t action; /* One of PSERIES_WDTF_ACTION_xxx */
+ uint8_t leave_others; /* leaveOtherWatchdogsRunningOnTimeout */
+} SpaprWatchdog;
+
/**
* SpaprMachineState:
*/
@@ -264,6 +279,8 @@ struct SpaprMachineState {
uint32_t FORM2_assoc_array[NUMA_NODES_MAX_NUM][FORM2_NUMA_ASSOC_SIZE];
Error *fwnmi_migration_blocker;
+
+ SpaprWatchdog wds[WDT_MAX_WATCHDOGS];
};
#define H_SUCCESS 0
@@ -344,6 +361,7 @@ struct SpaprMachineState {
#define H_P7 -60
#define H_P8 -61
#define H_P9 -62
+#define H_NOOP -63
#define H_UNSUPPORTED -67
#define H_OVERLAP -68
#define H_UNSUPPORTED_FLAG -256
@@ -564,8 +582,9 @@ struct SpaprMachineState {
#define H_SCM_HEALTH 0x400
#define H_RPT_INVALIDATE 0x448
#define H_SCM_FLUSH 0x44C
+#define H_WATCHDOG 0x45C
-#define MAX_HCALL_OPCODE H_SCM_FLUSH
+#define MAX_HCALL_OPCODE H_WATCHDOG
/* The hcalls above are standardized in PAPR and implemented by pHyp
* as well.
@@ -1027,6 +1046,7 @@ extern const VMStateDescription vmstate_spapr_cap_large_decr;
extern const VMStateDescription vmstate_spapr_cap_ccf_assist;
extern const VMStateDescription vmstate_spapr_cap_fwnmi;
extern const VMStateDescription vmstate_spapr_cap_rpt_invalidate;
+extern const VMStateDescription vmstate_spapr_wdt;
static inline uint8_t spapr_get_cap(SpaprMachineState *spapr, int cap)
{
@@ -1063,4 +1083,7 @@ target_ulong spapr_vof_client_architecture_support(MachineState *ms,
target_ulong ovec_addr);
void spapr_vof_client_dt_finalize(SpaprMachineState *spapr, void *fdt);
+/* H_WATCHDOG */
+void spapr_watchdog_init(SpaprMachineState *spapr);
+
#endif /* HW_SPAPR_H */
diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c
index fd4942e8813c..9a5382d5270f 100644
--- a/hw/ppc/spapr.c
+++ b/hw/ppc/spapr.c
@@ -898,6 +898,8 @@ static void spapr_dt_rtas(SpaprMachineState *spapr, void *fdt)
add_str(hypertas, "hcall-hpt-resize");
}
+ add_str(hypertas, "hcall-watchdog");
+
_FDT(fdt_setprop(fdt, rtas, "ibm,hypertas-functions",
hypertas->str, hypertas->len));
g_string_free(hypertas, TRUE);
@@ -3051,6 +3053,8 @@ static void spapr_machine_init(MachineState *machine)
spapr->vof->fw_size = fw_size; /* for claim() on itself */
spapr_register_hypercall(KVMPPC_H_VOF_CLIENT, spapr_h_vof_client);
}
+
+ spapr_watchdog_init(spapr);
}
#define DEFAULT_KVM_TYPE "auto"
diff --git a/hw/watchdog/spapr_watchdog.c b/hw/watchdog/spapr_watchdog.c
new file mode 100644
index 000000000000..55ff1f03c1da
--- /dev/null
+++ b/hw/watchdog/spapr_watchdog.c
@@ -0,0 +1,274 @@
+/*
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "qemu/osdep.h"
+#include "qapi/error.h"
+#include "target/ppc/cpu.h"
+#include "migration/vmstate.h"
+#include "trace.h"
+
+#include "hw/ppc/spapr.h"
+
+#define FIELD_BE(reg, field, start, len) \
+ FIELD(reg, field, 64 - (start + len), len)
+
+/*
+ * Bits 47: "leaveOtherWatchdogsRunningOnTimeout", specified on
+ * the "Start watchdog" operation,
+ * 0 - stop out-standing watchdogs on timeout,
+ * 1 - leave outstanding watchdogs running on timeout
+ */
+FIELD_BE(PSERIES_WDTF, LEAVE_OTHER, 47, 1)
+
+/* Bits 48-55: "operation" */
+FIELD_BE(PSERIES_WDTF, OP, 48, 8)
+#define PSERIES_WDTF_OP_START 0x1
+#define PSERIES_WDTF_OP_STOP 0x2
+#define PSERIES_WDTF_OP_QUERY 0x3
+#define PSERIES_WDTF_OP_QUERY_LPM 0x4
+
+/* Bits 56-63: "timeoutAction" */
+FIELD_BE(PSERIES_WDTF, ACTION, 56, 8)
+#define PSERIES_WDTF_ACTION_HARD_POWER_OFF 0x1
+#define PSERIES_WDTF_ACTION_HARD_RESTART 0x2
+#define PSERIES_WDTF_ACTION_DUMP_RESTART 0x3
+
+FIELD_BE(PSERIES_WDTF, RESERVED, 0, 47)
+
+/* Special watchdogNumber for the "stop all watchdogs" operation */
+#define PSERIES_WDT_STOP_ALL ((uint64_t)~0)
+
+/*
+ * For the "Query watchdog capabilities" operation, a uint64 structure
+ * defined as:
+ * Bits 0-15: The minimum supported timeout in milliseconds
+ * Bits 16-31: The number of watchdogs supported
+ * Bits 32-63: Reserved
+ */
+FIELD_BE(PSERIES_WDTQ, MIN_TIMEOUT, 0, 16)
+FIELD_BE(PSERIES_WDTQ, NUM, 16, 16)
+
+/*
+ * For the "Query watchdog LPM requirement" operation:
+ * 1 = The given "watchdogNumber" must be stopped prior to suspending
+ * 2 = The given "watchdogNumber" does not have to be stopped prior to
+ * suspending
+ */
+#define PSERIES_WDTQL_STOPPED 1
+#define PSERIES_WDTQL_QUERY_NOT_STOPPED 2
+
+#define WDT_MIN_TIMEOUT 1 /* 1ms */
+
+static target_ulong watchdog_stop(unsigned watchdogNumber, SpaprWatchdog *w)
+{
+ target_ulong ret = H_NOOP;
+
+ if (timer_pending(&w->timer)) {
+ timer_del(&w->timer);
+ ret = H_SUCCESS;
+ }
+ trace_spapr_watchdog_stop(watchdogNumber, ret);
+
+ return ret;
+}
+
+static target_ulong watchdog_stop_all(SpaprMachineState *spapr)
+{
+ target_ulong ret = H_NOOP;
+ int i;
+
+ for (i = 1; i <= ARRAY_SIZE(spapr->wds); ++i) {
+ target_ulong r = watchdog_stop(i, &spapr->wds[i - 1]);
+
+ if (r != H_NOOP && r != H_SUCCESS) {
+ ret = r;
+ }
+ }
+
+ return ret;
+}
+
+static void watchdog_expired(void *pw)
+{
+ SpaprWatchdog *w = pw;
+ CPUState *cs;
+ SpaprMachineState *spapr = SPAPR_MACHINE(qdev_get_machine());
+ unsigned num = w - spapr->wds;
+
+ g_assert(num < ARRAY_SIZE(spapr->wds));
+ trace_spapr_watchdog_expired(num, w->action);
+ switch (w->action) {
+ case PSERIES_WDTF_ACTION_HARD_POWER_OFF:
+ qemu_system_vmstop_request(RUN_STATE_SHUTDOWN);
+ break;
+ case PSERIES_WDTF_ACTION_HARD_RESTART:
+ qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET);
+ break;
+ case PSERIES_WDTF_ACTION_DUMP_RESTART:
+ CPU_FOREACH(cs) {
+ async_run_on_cpu(cs, spapr_do_system_reset_on_cpu, RUN_ON_CPU_NULL);
+ }
+ break;
+ }
+ if (!w->leave_others) {
+ watchdog_stop_all(spapr);
+ }
+}
+
+static target_ulong h_watchdog(PowerPCCPU *cpu,
+ SpaprMachineState *spapr,
+ target_ulong opcode, target_ulong *args)
+{
+ target_ulong ret = H_SUCCESS;
+ target_ulong flags = args[0];
+ target_ulong watchdogNumber = args[1]; /* 1-Based per PAPR */
+ target_ulong timeoutInMs = args[2];
+ unsigned operation = FIELD_EX64(flags, PSERIES_WDTF, OP);
+ unsigned timeoutAction = FIELD_EX64(flags, PSERIES_WDTF, ACTION);
+ SpaprWatchdog *w;
+
+ if (FIELD_EX64(flags, PSERIES_WDTF, RESERVED)) {
+ return H_PARAMETER;
+ }
+
+ switch (operation) {
+ case PSERIES_WDTF_OP_START:
+ if (watchdogNumber > ARRAY_SIZE(spapr->wds)) {
+ return H_P2;
+ }
+ if (timeoutInMs <= WDT_MIN_TIMEOUT) {
+ return H_P3;
+ }
+
+ w = &spapr->wds[watchdogNumber - 1];
+ switch (timeoutAction) {
+ case PSERIES_WDTF_ACTION_HARD_POWER_OFF:
+ case PSERIES_WDTF_ACTION_HARD_RESTART:
+ case PSERIES_WDTF_ACTION_DUMP_RESTART:
+ w->action = timeoutAction;
+ break;
+ default:
+ return H_PARAMETER;
+ }
+ w->leave_others = FIELD_EX64(flags, PSERIES_WDTF, LEAVE_OTHER);
+ timer_mod(&w->timer,
+ qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL) + timeoutInMs);
+ trace_spapr_watchdog_start(flags, watchdogNumber, timeoutInMs);
+ break;
+ case PSERIES_WDTF_OP_STOP:
+ if (watchdogNumber == PSERIES_WDT_STOP_ALL) {
+ ret = watchdog_stop_all(spapr);
+ } else if (watchdogNumber <= ARRAY_SIZE(spapr->wds)) {
+ ret = watchdog_stop(watchdogNumber,
+ &spapr->wds[watchdogNumber - 1]);
+ } else {
+ return H_P2;
+ }
+ break;
+ case PSERIES_WDTF_OP_QUERY:
+ args[0] = FIELD_DP64(0, PSERIES_WDTQ, MIN_TIMEOUT, WDT_MIN_TIMEOUT);
+ args[0] = FIELD_DP64(args[0], PSERIES_WDTQ, NUM,
+ ARRAY_SIZE(spapr->wds));
+ trace_spapr_watchdog_query(args[0]);
+ break;
+ case PSERIES_WDTF_OP_QUERY_LPM:
+ if (watchdogNumber > ARRAY_SIZE(spapr->wds)) {
+ return H_P2;
+ }
+ args[0] = PSERIES_WDTQL_QUERY_NOT_STOPPED;
+ trace_spapr_watchdog_query_lpm(args[0]);
+ break;
+ default:
+ return H_PARAMETER;
+ }
+
+ return ret;
+}
+
+void spapr_watchdog_init(SpaprMachineState *spapr)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(spapr->wds); ++i) {
+ char name[16];
+ SpaprWatchdog *w = &spapr->wds[i];
+
+ snprintf(name, sizeof(name) - 1, "wdt%d", i + 1);
+ object_initialize_child_with_props(OBJECT(spapr), name, w,
+ sizeof(SpaprWatchdog),
+ TYPE_SPAPR_WDT,
+ &error_fatal, NULL);
+ qdev_realize(DEVICE(w), NULL, &error_fatal);
+ }
+}
+
+static bool watchdog_needed(void *opaque)
+{
+ SpaprWatchdog *w = opaque;
+
+ return timer_pending(&w->timer);
+}
+
+static const VMStateDescription vmstate_wdt = {
+ .name = "spapr_watchdog",
+ .version_id = 1,
+ .minimum_version_id = 1,
+ .needed = watchdog_needed,
+ .fields = (VMStateField[]) {
+ VMSTATE_TIMER(timer, SpaprWatchdog),
+ VMSTATE_UINT8(action, SpaprWatchdog),
+ VMSTATE_UINT8(leave_others, SpaprWatchdog),
+ VMSTATE_END_OF_LIST()
+ }
+};
+
+static void spapr_wdt_realize(DeviceState *dev, Error **errp)
+{
+ SpaprWatchdog *w = SPAPR_WDT(dev);
+ Object *o = OBJECT(dev);
+
+ timer_init_ms(&w->timer, QEMU_CLOCK_VIRTUAL, watchdog_expired, w);
+
+ object_property_add_uint64_ptr(o, "expire",
+ (uint64_t *)&w->timer.expire_time,
+ OBJ_PROP_FLAG_READ);
+ object_property_add_uint8_ptr(o, "action", &w->action, OBJ_PROP_FLAG_READ);
+ object_property_add_uint8_ptr(o, "leaveOtherWatchdogsRunningOnTimeout",
+ &w->leave_others, OBJ_PROP_FLAG_READ);
+}
+
+static void spapr_wdt_class_init(ObjectClass *oc, void *data)
+{
+ DeviceClass *dc = DEVICE_CLASS(oc);
+
+ dc->realize = spapr_wdt_realize;
+ dc->vmsd = &vmstate_wdt;
+ dc->user_creatable = false;
+}
+
+static const TypeInfo spapr_wdt_info = {
+ .name = TYPE_SPAPR_WDT,
+ .parent = TYPE_DEVICE,
+ .instance_size = sizeof(SpaprWatchdog),
+ .class_init = spapr_wdt_class_init,
+};
+
+static void spapr_watchdog_register_types(void)
+{
+ spapr_register_hypercall(H_WATCHDOG, h_watchdog);
+ type_register_static(&spapr_wdt_info);
+}
+
+type_init(spapr_watchdog_register_types)
diff --git a/hw/watchdog/meson.build b/hw/watchdog/meson.build
index 054c403dea7c..8974b5cf4c8a 100644
--- a/hw/watchdog/meson.build
+++ b/hw/watchdog/meson.build
@@ -6,3 +6,4 @@ softmmu_ss.add(when: 'CONFIG_WDT_DIAG288', if_true: files('wdt_diag288.c'))
softmmu_ss.add(when: 'CONFIG_ASPEED_SOC', if_true: files('wdt_aspeed.c'))
softmmu_ss.add(when: 'CONFIG_WDT_IMX2', if_true: files('wdt_imx2.c'))
softmmu_ss.add(when: 'CONFIG_WDT_SBSA', if_true: files('sbsa_gwdt.c'))
+specific_ss.add(when: 'CONFIG_PSERIES', if_true: files('spapr_watchdog.c'))
diff --git a/hw/watchdog/trace-events b/hw/watchdog/trace-events
index e7523e22aaf2..89ccbcfdfd20 100644
--- a/hw/watchdog/trace-events
+++ b/hw/watchdog/trace-events
@@ -9,3 +9,10 @@ cmsdk_apb_watchdog_lock(uint32_t lock) "CMSDK APB watchdog: lock %" PRIu32
# wdt-aspeed.c
aspeed_wdt_read(uint64_t addr, uint32_t size) "@0x%" PRIx64 " size=%d"
aspeed_wdt_write(uint64_t addr, uint32_t size, uint64_t data) "@0x%" PRIx64 " size=%d value=0x%"PRIx64
+
+# spapr_watchdog.c
+spapr_watchdog_start(uint64_t flags, uint64_t num, uint64_t timeout) "Flags 0x%" PRIx64 " num=%" PRId64 " %" PRIu64 "ms"
+spapr_watchdog_stop(uint64_t num, uint64_t ret) "num=%" PRIu64 " ret=%" PRId64
+spapr_watchdog_query(uint64_t caps) "caps=0x%" PRIx64
+spapr_watchdog_query_lpm(uint64_t caps) "caps=0x%" PRIx64
+spapr_watchdog_expired(uint64_t num, unsigned action) "num=%" PRIu64 " action=%u"
--
2.30.2
Queued in gitlab.com/danielhb/qemu/tree/ppc-next. Thanks, Daniel On 6/22/22 02:10, Alexey Kardashevskiy wrote: > The new PAPR 2.12 defines a watchdog facility managed via the new > H_WATCHDOG hypercall. > > This adds H_WATCHDOG support which a proposed driver for pseries uses: > https://patchwork.ozlabs.org/project/linuxppc-dev/list/?series=303120 > > This was tested by running QEMU with a debug kernel and command line: > -append \ > "pseries-wdt.timeout=60 pseries-wdt.nowayout=1 pseries-wdt.action=2" > > and running "echo V > /dev/watchdog0" inside the VM. > > Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> > --- > Changes: > v3: > * removed @num from SpaprWatchdog > * reworked to use standard FIELD_EX/FIELD_OP > * expire_time is a property now > * added handling of leaveOtherWatchdogsRunningOnTimeout > > v2: > * QOM'ed timers, "action" and "expire" are available via QMP > * removed @timeout from SpaprWatchdog > * moved the driver to hw/watchdog > * fixed error handling in the hcall handler > * used new SETFIELD/GETFIELD > --- > include/hw/ppc/spapr.h | 25 +++- > hw/ppc/spapr.c | 4 + > hw/watchdog/spapr_watchdog.c | 274 +++++++++++++++++++++++++++++++++++ > hw/watchdog/meson.build | 1 + > hw/watchdog/trace-events | 7 + > 5 files changed, 310 insertions(+), 1 deletion(-) > create mode 100644 hw/watchdog/spapr_watchdog.c > > diff --git a/include/hw/ppc/spapr.h b/include/hw/ppc/spapr.h > index 072dda2c7265..891be79604fe 100644 > --- a/include/hw/ppc/spapr.h > +++ b/include/hw/ppc/spapr.h > @@ -164,6 +164,21 @@ struct SpaprMachineClass { > SpaprIrq *irq; > }; > > +#define WDT_MAX_WATCHDOGS 4 /* Maximum number of watchdog devices */ > + > +#define TYPE_SPAPR_WDT "spapr-wdt" > +OBJECT_DECLARE_SIMPLE_TYPE(SpaprWatchdog, SPAPR_WDT) > + > +typedef struct SpaprWatchdog { > + /*< private >*/ > + DeviceState parent_obj; > + /*< public >*/ > + > + QEMUTimer timer; > + uint8_t action; /* One of PSERIES_WDTF_ACTION_xxx */ > + uint8_t leave_others; /* leaveOtherWatchdogsRunningOnTimeout */ > +} SpaprWatchdog; > + > /** > * SpaprMachineState: > */ > @@ -264,6 +279,8 @@ struct SpaprMachineState { > uint32_t FORM2_assoc_array[NUMA_NODES_MAX_NUM][FORM2_NUMA_ASSOC_SIZE]; > > Error *fwnmi_migration_blocker; > + > + SpaprWatchdog wds[WDT_MAX_WATCHDOGS]; > }; > > #define H_SUCCESS 0 > @@ -344,6 +361,7 @@ struct SpaprMachineState { > #define H_P7 -60 > #define H_P8 -61 > #define H_P9 -62 > +#define H_NOOP -63 > #define H_UNSUPPORTED -67 > #define H_OVERLAP -68 > #define H_UNSUPPORTED_FLAG -256 > @@ -564,8 +582,9 @@ struct SpaprMachineState { > #define H_SCM_HEALTH 0x400 > #define H_RPT_INVALIDATE 0x448 > #define H_SCM_FLUSH 0x44C > +#define H_WATCHDOG 0x45C > > -#define MAX_HCALL_OPCODE H_SCM_FLUSH > +#define MAX_HCALL_OPCODE H_WATCHDOG > > /* The hcalls above are standardized in PAPR and implemented by pHyp > * as well. > @@ -1027,6 +1046,7 @@ extern const VMStateDescription vmstate_spapr_cap_large_decr; > extern const VMStateDescription vmstate_spapr_cap_ccf_assist; > extern const VMStateDescription vmstate_spapr_cap_fwnmi; > extern const VMStateDescription vmstate_spapr_cap_rpt_invalidate; > +extern const VMStateDescription vmstate_spapr_wdt; > > static inline uint8_t spapr_get_cap(SpaprMachineState *spapr, int cap) > { > @@ -1063,4 +1083,7 @@ target_ulong spapr_vof_client_architecture_support(MachineState *ms, > target_ulong ovec_addr); > void spapr_vof_client_dt_finalize(SpaprMachineState *spapr, void *fdt); > > +/* H_WATCHDOG */ > +void spapr_watchdog_init(SpaprMachineState *spapr); > + > #endif /* HW_SPAPR_H */ > diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c > index fd4942e8813c..9a5382d5270f 100644 > --- a/hw/ppc/spapr.c > +++ b/hw/ppc/spapr.c > @@ -898,6 +898,8 @@ static void spapr_dt_rtas(SpaprMachineState *spapr, void *fdt) > add_str(hypertas, "hcall-hpt-resize"); > } > > + add_str(hypertas, "hcall-watchdog"); > + > _FDT(fdt_setprop(fdt, rtas, "ibm,hypertas-functions", > hypertas->str, hypertas->len)); > g_string_free(hypertas, TRUE); > @@ -3051,6 +3053,8 @@ static void spapr_machine_init(MachineState *machine) > spapr->vof->fw_size = fw_size; /* for claim() on itself */ > spapr_register_hypercall(KVMPPC_H_VOF_CLIENT, spapr_h_vof_client); > } > + > + spapr_watchdog_init(spapr); > } > > #define DEFAULT_KVM_TYPE "auto" > diff --git a/hw/watchdog/spapr_watchdog.c b/hw/watchdog/spapr_watchdog.c > new file mode 100644 > index 000000000000..55ff1f03c1da > --- /dev/null > +++ b/hw/watchdog/spapr_watchdog.c > @@ -0,0 +1,274 @@ > +/* > + * This library is free software; you can redistribute it and/or > + * modify it under the terms of the GNU Lesser General Public > + * License as published by the Free Software Foundation; either > + * version 2.1 of the License, or (at your option) any later version. > + * > + * This library is distributed in the hope that it will be useful, > + * but WITHOUT ANY WARRANTY; without even the implied warranty of > + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU > + * Lesser General Public License for more details. > + * > + * You should have received a copy of the GNU Lesser General Public > + * License along with this library; if not, see <http://www.gnu.org/licenses/>. > + */ > + > +#include "qemu/osdep.h" > +#include "qapi/error.h" > +#include "target/ppc/cpu.h" > +#include "migration/vmstate.h" > +#include "trace.h" > + > +#include "hw/ppc/spapr.h" > + > +#define FIELD_BE(reg, field, start, len) \ > + FIELD(reg, field, 64 - (start + len), len) > + > +/* > + * Bits 47: "leaveOtherWatchdogsRunningOnTimeout", specified on > + * the "Start watchdog" operation, > + * 0 - stop out-standing watchdogs on timeout, > + * 1 - leave outstanding watchdogs running on timeout > + */ > +FIELD_BE(PSERIES_WDTF, LEAVE_OTHER, 47, 1) > + > +/* Bits 48-55: "operation" */ > +FIELD_BE(PSERIES_WDTF, OP, 48, 8) > +#define PSERIES_WDTF_OP_START 0x1 > +#define PSERIES_WDTF_OP_STOP 0x2 > +#define PSERIES_WDTF_OP_QUERY 0x3 > +#define PSERIES_WDTF_OP_QUERY_LPM 0x4 > + > +/* Bits 56-63: "timeoutAction" */ > +FIELD_BE(PSERIES_WDTF, ACTION, 56, 8) > +#define PSERIES_WDTF_ACTION_HARD_POWER_OFF 0x1 > +#define PSERIES_WDTF_ACTION_HARD_RESTART 0x2 > +#define PSERIES_WDTF_ACTION_DUMP_RESTART 0x3 > + > +FIELD_BE(PSERIES_WDTF, RESERVED, 0, 47) > + > +/* Special watchdogNumber for the "stop all watchdogs" operation */ > +#define PSERIES_WDT_STOP_ALL ((uint64_t)~0) > + > +/* > + * For the "Query watchdog capabilities" operation, a uint64 structure > + * defined as: > + * Bits 0-15: The minimum supported timeout in milliseconds > + * Bits 16-31: The number of watchdogs supported > + * Bits 32-63: Reserved > + */ > +FIELD_BE(PSERIES_WDTQ, MIN_TIMEOUT, 0, 16) > +FIELD_BE(PSERIES_WDTQ, NUM, 16, 16) > + > +/* > + * For the "Query watchdog LPM requirement" operation: > + * 1 = The given "watchdogNumber" must be stopped prior to suspending > + * 2 = The given "watchdogNumber" does not have to be stopped prior to > + * suspending > + */ > +#define PSERIES_WDTQL_STOPPED 1 > +#define PSERIES_WDTQL_QUERY_NOT_STOPPED 2 > + > +#define WDT_MIN_TIMEOUT 1 /* 1ms */ > + > +static target_ulong watchdog_stop(unsigned watchdogNumber, SpaprWatchdog *w) > +{ > + target_ulong ret = H_NOOP; > + > + if (timer_pending(&w->timer)) { > + timer_del(&w->timer); > + ret = H_SUCCESS; > + } > + trace_spapr_watchdog_stop(watchdogNumber, ret); > + > + return ret; > +} > + > +static target_ulong watchdog_stop_all(SpaprMachineState *spapr) > +{ > + target_ulong ret = H_NOOP; > + int i; > + > + for (i = 1; i <= ARRAY_SIZE(spapr->wds); ++i) { > + target_ulong r = watchdog_stop(i, &spapr->wds[i - 1]); > + > + if (r != H_NOOP && r != H_SUCCESS) { > + ret = r; > + } > + } > + > + return ret; > +} > + > +static void watchdog_expired(void *pw) > +{ > + SpaprWatchdog *w = pw; > + CPUState *cs; > + SpaprMachineState *spapr = SPAPR_MACHINE(qdev_get_machine()); > + unsigned num = w - spapr->wds; > + > + g_assert(num < ARRAY_SIZE(spapr->wds)); > + trace_spapr_watchdog_expired(num, w->action); > + switch (w->action) { > + case PSERIES_WDTF_ACTION_HARD_POWER_OFF: > + qemu_system_vmstop_request(RUN_STATE_SHUTDOWN); > + break; > + case PSERIES_WDTF_ACTION_HARD_RESTART: > + qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET); > + break; > + case PSERIES_WDTF_ACTION_DUMP_RESTART: > + CPU_FOREACH(cs) { > + async_run_on_cpu(cs, spapr_do_system_reset_on_cpu, RUN_ON_CPU_NULL); > + } > + break; > + } > + if (!w->leave_others) { > + watchdog_stop_all(spapr); > + } > +} > + > +static target_ulong h_watchdog(PowerPCCPU *cpu, > + SpaprMachineState *spapr, > + target_ulong opcode, target_ulong *args) > +{ > + target_ulong ret = H_SUCCESS; > + target_ulong flags = args[0]; > + target_ulong watchdogNumber = args[1]; /* 1-Based per PAPR */ > + target_ulong timeoutInMs = args[2]; > + unsigned operation = FIELD_EX64(flags, PSERIES_WDTF, OP); > + unsigned timeoutAction = FIELD_EX64(flags, PSERIES_WDTF, ACTION); > + SpaprWatchdog *w; > + > + if (FIELD_EX64(flags, PSERIES_WDTF, RESERVED)) { > + return H_PARAMETER; > + } > + > + switch (operation) { > + case PSERIES_WDTF_OP_START: > + if (watchdogNumber > ARRAY_SIZE(spapr->wds)) { > + return H_P2; > + } > + if (timeoutInMs <= WDT_MIN_TIMEOUT) { > + return H_P3; > + } > + > + w = &spapr->wds[watchdogNumber - 1]; > + switch (timeoutAction) { > + case PSERIES_WDTF_ACTION_HARD_POWER_OFF: > + case PSERIES_WDTF_ACTION_HARD_RESTART: > + case PSERIES_WDTF_ACTION_DUMP_RESTART: > + w->action = timeoutAction; > + break; > + default: > + return H_PARAMETER; > + } > + w->leave_others = FIELD_EX64(flags, PSERIES_WDTF, LEAVE_OTHER); > + timer_mod(&w->timer, > + qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL) + timeoutInMs); > + trace_spapr_watchdog_start(flags, watchdogNumber, timeoutInMs); > + break; > + case PSERIES_WDTF_OP_STOP: > + if (watchdogNumber == PSERIES_WDT_STOP_ALL) { > + ret = watchdog_stop_all(spapr); > + } else if (watchdogNumber <= ARRAY_SIZE(spapr->wds)) { > + ret = watchdog_stop(watchdogNumber, > + &spapr->wds[watchdogNumber - 1]); > + } else { > + return H_P2; > + } > + break; > + case PSERIES_WDTF_OP_QUERY: > + args[0] = FIELD_DP64(0, PSERIES_WDTQ, MIN_TIMEOUT, WDT_MIN_TIMEOUT); > + args[0] = FIELD_DP64(args[0], PSERIES_WDTQ, NUM, > + ARRAY_SIZE(spapr->wds)); > + trace_spapr_watchdog_query(args[0]); > + break; > + case PSERIES_WDTF_OP_QUERY_LPM: > + if (watchdogNumber > ARRAY_SIZE(spapr->wds)) { > + return H_P2; > + } > + args[0] = PSERIES_WDTQL_QUERY_NOT_STOPPED; > + trace_spapr_watchdog_query_lpm(args[0]); > + break; > + default: > + return H_PARAMETER; > + } > + > + return ret; > +} > + > +void spapr_watchdog_init(SpaprMachineState *spapr) > +{ > + int i; > + > + for (i = 0; i < ARRAY_SIZE(spapr->wds); ++i) { > + char name[16]; > + SpaprWatchdog *w = &spapr->wds[i]; > + > + snprintf(name, sizeof(name) - 1, "wdt%d", i + 1); > + object_initialize_child_with_props(OBJECT(spapr), name, w, > + sizeof(SpaprWatchdog), > + TYPE_SPAPR_WDT, > + &error_fatal, NULL); > + qdev_realize(DEVICE(w), NULL, &error_fatal); > + } > +} > + > +static bool watchdog_needed(void *opaque) > +{ > + SpaprWatchdog *w = opaque; > + > + return timer_pending(&w->timer); > +} > + > +static const VMStateDescription vmstate_wdt = { > + .name = "spapr_watchdog", > + .version_id = 1, > + .minimum_version_id = 1, > + .needed = watchdog_needed, > + .fields = (VMStateField[]) { > + VMSTATE_TIMER(timer, SpaprWatchdog), > + VMSTATE_UINT8(action, SpaprWatchdog), > + VMSTATE_UINT8(leave_others, SpaprWatchdog), > + VMSTATE_END_OF_LIST() > + } > +}; > + > +static void spapr_wdt_realize(DeviceState *dev, Error **errp) > +{ > + SpaprWatchdog *w = SPAPR_WDT(dev); > + Object *o = OBJECT(dev); > + > + timer_init_ms(&w->timer, QEMU_CLOCK_VIRTUAL, watchdog_expired, w); > + > + object_property_add_uint64_ptr(o, "expire", > + (uint64_t *)&w->timer.expire_time, > + OBJ_PROP_FLAG_READ); > + object_property_add_uint8_ptr(o, "action", &w->action, OBJ_PROP_FLAG_READ); > + object_property_add_uint8_ptr(o, "leaveOtherWatchdogsRunningOnTimeout", > + &w->leave_others, OBJ_PROP_FLAG_READ); > +} > + > +static void spapr_wdt_class_init(ObjectClass *oc, void *data) > +{ > + DeviceClass *dc = DEVICE_CLASS(oc); > + > + dc->realize = spapr_wdt_realize; > + dc->vmsd = &vmstate_wdt; > + dc->user_creatable = false; > +} > + > +static const TypeInfo spapr_wdt_info = { > + .name = TYPE_SPAPR_WDT, > + .parent = TYPE_DEVICE, > + .instance_size = sizeof(SpaprWatchdog), > + .class_init = spapr_wdt_class_init, > +}; > + > +static void spapr_watchdog_register_types(void) > +{ > + spapr_register_hypercall(H_WATCHDOG, h_watchdog); > + type_register_static(&spapr_wdt_info); > +} > + > +type_init(spapr_watchdog_register_types) > diff --git a/hw/watchdog/meson.build b/hw/watchdog/meson.build > index 054c403dea7c..8974b5cf4c8a 100644 > --- a/hw/watchdog/meson.build > +++ b/hw/watchdog/meson.build > @@ -6,3 +6,4 @@ softmmu_ss.add(when: 'CONFIG_WDT_DIAG288', if_true: files('wdt_diag288.c')) > softmmu_ss.add(when: 'CONFIG_ASPEED_SOC', if_true: files('wdt_aspeed.c')) > softmmu_ss.add(when: 'CONFIG_WDT_IMX2', if_true: files('wdt_imx2.c')) > softmmu_ss.add(when: 'CONFIG_WDT_SBSA', if_true: files('sbsa_gwdt.c')) > +specific_ss.add(when: 'CONFIG_PSERIES', if_true: files('spapr_watchdog.c')) > diff --git a/hw/watchdog/trace-events b/hw/watchdog/trace-events > index e7523e22aaf2..89ccbcfdfd20 100644 > --- a/hw/watchdog/trace-events > +++ b/hw/watchdog/trace-events > @@ -9,3 +9,10 @@ cmsdk_apb_watchdog_lock(uint32_t lock) "CMSDK APB watchdog: lock %" PRIu32 > # wdt-aspeed.c > aspeed_wdt_read(uint64_t addr, uint32_t size) "@0x%" PRIx64 " size=%d" > aspeed_wdt_write(uint64_t addr, uint32_t size, uint64_t data) "@0x%" PRIx64 " size=%d value=0x%"PRIx64 > + > +# spapr_watchdog.c > +spapr_watchdog_start(uint64_t flags, uint64_t num, uint64_t timeout) "Flags 0x%" PRIx64 " num=%" PRId64 " %" PRIu64 "ms" > +spapr_watchdog_stop(uint64_t num, uint64_t ret) "num=%" PRIu64 " ret=%" PRId64 > +spapr_watchdog_query(uint64_t caps) "caps=0x%" PRIx64 > +spapr_watchdog_query_lpm(uint64_t caps) "caps=0x%" PRIx64 > +spapr_watchdog_expired(uint64_t num, unsigned action) "num=%" PRIu64 " action=%u"
On 6/22/22 02:10, Alexey Kardashevskiy wrote: > The new PAPR 2.12 defines a watchdog facility managed via the new > H_WATCHDOG hypercall. > > This adds H_WATCHDOG support which a proposed driver for pseries uses: > https://patchwork.ozlabs.org/project/linuxppc-dev/list/?series=303120 > > This was tested by running QEMU with a debug kernel and command line: > -append \ > "pseries-wdt.timeout=60 pseries-wdt.nowayout=1 pseries-wdt.action=2" > > and running "echo V > /dev/watchdog0" inside the VM. > > Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> > --- Reviewed-by: Daniel Henrique Barboza <danielhb413@gmail.com> > Changes: > v3: > * removed @num from SpaprWatchdog > * reworked to use standard FIELD_EX/FIELD_OP > * expire_time is a property now > * added handling of leaveOtherWatchdogsRunningOnTimeout > > v2: > * QOM'ed timers, "action" and "expire" are available via QMP > * removed @timeout from SpaprWatchdog > * moved the driver to hw/watchdog > * fixed error handling in the hcall handler > * used new SETFIELD/GETFIELD > --- > include/hw/ppc/spapr.h | 25 +++- > hw/ppc/spapr.c | 4 + > hw/watchdog/spapr_watchdog.c | 274 +++++++++++++++++++++++++++++++++++ > hw/watchdog/meson.build | 1 + > hw/watchdog/trace-events | 7 + > 5 files changed, 310 insertions(+), 1 deletion(-) > create mode 100644 hw/watchdog/spapr_watchdog.c > > diff --git a/include/hw/ppc/spapr.h b/include/hw/ppc/spapr.h > index 072dda2c7265..891be79604fe 100644 > --- a/include/hw/ppc/spapr.h > +++ b/include/hw/ppc/spapr.h > @@ -164,6 +164,21 @@ struct SpaprMachineClass { > SpaprIrq *irq; > }; > > +#define WDT_MAX_WATCHDOGS 4 /* Maximum number of watchdog devices */ > + > +#define TYPE_SPAPR_WDT "spapr-wdt" > +OBJECT_DECLARE_SIMPLE_TYPE(SpaprWatchdog, SPAPR_WDT) > + > +typedef struct SpaprWatchdog { > + /*< private >*/ > + DeviceState parent_obj; > + /*< public >*/ > + > + QEMUTimer timer; > + uint8_t action; /* One of PSERIES_WDTF_ACTION_xxx */ > + uint8_t leave_others; /* leaveOtherWatchdogsRunningOnTimeout */ > +} SpaprWatchdog; > + > /** > * SpaprMachineState: > */ > @@ -264,6 +279,8 @@ struct SpaprMachineState { > uint32_t FORM2_assoc_array[NUMA_NODES_MAX_NUM][FORM2_NUMA_ASSOC_SIZE]; > > Error *fwnmi_migration_blocker; > + > + SpaprWatchdog wds[WDT_MAX_WATCHDOGS]; > }; > > #define H_SUCCESS 0 > @@ -344,6 +361,7 @@ struct SpaprMachineState { > #define H_P7 -60 > #define H_P8 -61 > #define H_P9 -62 > +#define H_NOOP -63 > #define H_UNSUPPORTED -67 > #define H_OVERLAP -68 > #define H_UNSUPPORTED_FLAG -256 > @@ -564,8 +582,9 @@ struct SpaprMachineState { > #define H_SCM_HEALTH 0x400 > #define H_RPT_INVALIDATE 0x448 > #define H_SCM_FLUSH 0x44C > +#define H_WATCHDOG 0x45C > > -#define MAX_HCALL_OPCODE H_SCM_FLUSH > +#define MAX_HCALL_OPCODE H_WATCHDOG > > /* The hcalls above are standardized in PAPR and implemented by pHyp > * as well. > @@ -1027,6 +1046,7 @@ extern const VMStateDescription vmstate_spapr_cap_large_decr; > extern const VMStateDescription vmstate_spapr_cap_ccf_assist; > extern const VMStateDescription vmstate_spapr_cap_fwnmi; > extern const VMStateDescription vmstate_spapr_cap_rpt_invalidate; > +extern const VMStateDescription vmstate_spapr_wdt; > > static inline uint8_t spapr_get_cap(SpaprMachineState *spapr, int cap) > { > @@ -1063,4 +1083,7 @@ target_ulong spapr_vof_client_architecture_support(MachineState *ms, > target_ulong ovec_addr); > void spapr_vof_client_dt_finalize(SpaprMachineState *spapr, void *fdt); > > +/* H_WATCHDOG */ > +void spapr_watchdog_init(SpaprMachineState *spapr); > + > #endif /* HW_SPAPR_H */ > diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c > index fd4942e8813c..9a5382d5270f 100644 > --- a/hw/ppc/spapr.c > +++ b/hw/ppc/spapr.c > @@ -898,6 +898,8 @@ static void spapr_dt_rtas(SpaprMachineState *spapr, void *fdt) > add_str(hypertas, "hcall-hpt-resize"); > } > > + add_str(hypertas, "hcall-watchdog"); > + > _FDT(fdt_setprop(fdt, rtas, "ibm,hypertas-functions", > hypertas->str, hypertas->len)); > g_string_free(hypertas, TRUE); > @@ -3051,6 +3053,8 @@ static void spapr_machine_init(MachineState *machine) > spapr->vof->fw_size = fw_size; /* for claim() on itself */ > spapr_register_hypercall(KVMPPC_H_VOF_CLIENT, spapr_h_vof_client); > } > + > + spapr_watchdog_init(spapr); > } > > #define DEFAULT_KVM_TYPE "auto" > diff --git a/hw/watchdog/spapr_watchdog.c b/hw/watchdog/spapr_watchdog.c > new file mode 100644 > index 000000000000..55ff1f03c1da > --- /dev/null > +++ b/hw/watchdog/spapr_watchdog.c > @@ -0,0 +1,274 @@ > +/* > + * This library is free software; you can redistribute it and/or > + * modify it under the terms of the GNU Lesser General Public > + * License as published by the Free Software Foundation; either > + * version 2.1 of the License, or (at your option) any later version. > + * > + * This library is distributed in the hope that it will be useful, > + * but WITHOUT ANY WARRANTY; without even the implied warranty of > + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU > + * Lesser General Public License for more details. > + * > + * You should have received a copy of the GNU Lesser General Public > + * License along with this library; if not, see <http://www.gnu.org/licenses/>. > + */ > + > +#include "qemu/osdep.h" > +#include "qapi/error.h" > +#include "target/ppc/cpu.h" > +#include "migration/vmstate.h" > +#include "trace.h" > + > +#include "hw/ppc/spapr.h" > + > +#define FIELD_BE(reg, field, start, len) \ > + FIELD(reg, field, 64 - (start + len), len) > + > +/* > + * Bits 47: "leaveOtherWatchdogsRunningOnTimeout", specified on > + * the "Start watchdog" operation, > + * 0 - stop out-standing watchdogs on timeout, > + * 1 - leave outstanding watchdogs running on timeout > + */ > +FIELD_BE(PSERIES_WDTF, LEAVE_OTHER, 47, 1) > + > +/* Bits 48-55: "operation" */ > +FIELD_BE(PSERIES_WDTF, OP, 48, 8) > +#define PSERIES_WDTF_OP_START 0x1 > +#define PSERIES_WDTF_OP_STOP 0x2 > +#define PSERIES_WDTF_OP_QUERY 0x3 > +#define PSERIES_WDTF_OP_QUERY_LPM 0x4 > + > +/* Bits 56-63: "timeoutAction" */ > +FIELD_BE(PSERIES_WDTF, ACTION, 56, 8) > +#define PSERIES_WDTF_ACTION_HARD_POWER_OFF 0x1 > +#define PSERIES_WDTF_ACTION_HARD_RESTART 0x2 > +#define PSERIES_WDTF_ACTION_DUMP_RESTART 0x3 > + > +FIELD_BE(PSERIES_WDTF, RESERVED, 0, 47) > + > +/* Special watchdogNumber for the "stop all watchdogs" operation */ > +#define PSERIES_WDT_STOP_ALL ((uint64_t)~0) > + > +/* > + * For the "Query watchdog capabilities" operation, a uint64 structure > + * defined as: > + * Bits 0-15: The minimum supported timeout in milliseconds > + * Bits 16-31: The number of watchdogs supported > + * Bits 32-63: Reserved > + */ > +FIELD_BE(PSERIES_WDTQ, MIN_TIMEOUT, 0, 16) > +FIELD_BE(PSERIES_WDTQ, NUM, 16, 16) > + > +/* > + * For the "Query watchdog LPM requirement" operation: > + * 1 = The given "watchdogNumber" must be stopped prior to suspending > + * 2 = The given "watchdogNumber" does not have to be stopped prior to > + * suspending > + */ > +#define PSERIES_WDTQL_STOPPED 1 > +#define PSERIES_WDTQL_QUERY_NOT_STOPPED 2 > + > +#define WDT_MIN_TIMEOUT 1 /* 1ms */ > + > +static target_ulong watchdog_stop(unsigned watchdogNumber, SpaprWatchdog *w) > +{ > + target_ulong ret = H_NOOP; > + > + if (timer_pending(&w->timer)) { > + timer_del(&w->timer); > + ret = H_SUCCESS; > + } > + trace_spapr_watchdog_stop(watchdogNumber, ret); > + > + return ret; > +} > + > +static target_ulong watchdog_stop_all(SpaprMachineState *spapr) > +{ > + target_ulong ret = H_NOOP; > + int i; > + > + for (i = 1; i <= ARRAY_SIZE(spapr->wds); ++i) { > + target_ulong r = watchdog_stop(i, &spapr->wds[i - 1]); > + > + if (r != H_NOOP && r != H_SUCCESS) { > + ret = r; > + } > + } > + > + return ret; > +} > + > +static void watchdog_expired(void *pw) > +{ > + SpaprWatchdog *w = pw; > + CPUState *cs; > + SpaprMachineState *spapr = SPAPR_MACHINE(qdev_get_machine()); > + unsigned num = w - spapr->wds; > + > + g_assert(num < ARRAY_SIZE(spapr->wds)); > + trace_spapr_watchdog_expired(num, w->action); > + switch (w->action) { > + case PSERIES_WDTF_ACTION_HARD_POWER_OFF: > + qemu_system_vmstop_request(RUN_STATE_SHUTDOWN); > + break; > + case PSERIES_WDTF_ACTION_HARD_RESTART: > + qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET); > + break; > + case PSERIES_WDTF_ACTION_DUMP_RESTART: > + CPU_FOREACH(cs) { > + async_run_on_cpu(cs, spapr_do_system_reset_on_cpu, RUN_ON_CPU_NULL); > + } > + break; > + } > + if (!w->leave_others) { > + watchdog_stop_all(spapr); > + } > +} > + > +static target_ulong h_watchdog(PowerPCCPU *cpu, > + SpaprMachineState *spapr, > + target_ulong opcode, target_ulong *args) > +{ > + target_ulong ret = H_SUCCESS; > + target_ulong flags = args[0]; > + target_ulong watchdogNumber = args[1]; /* 1-Based per PAPR */ > + target_ulong timeoutInMs = args[2]; > + unsigned operation = FIELD_EX64(flags, PSERIES_WDTF, OP); > + unsigned timeoutAction = FIELD_EX64(flags, PSERIES_WDTF, ACTION); > + SpaprWatchdog *w; > + > + if (FIELD_EX64(flags, PSERIES_WDTF, RESERVED)) { > + return H_PARAMETER; > + } > + > + switch (operation) { > + case PSERIES_WDTF_OP_START: > + if (watchdogNumber > ARRAY_SIZE(spapr->wds)) { > + return H_P2; > + } > + if (timeoutInMs <= WDT_MIN_TIMEOUT) { > + return H_P3; > + } > + > + w = &spapr->wds[watchdogNumber - 1]; > + switch (timeoutAction) { > + case PSERIES_WDTF_ACTION_HARD_POWER_OFF: > + case PSERIES_WDTF_ACTION_HARD_RESTART: > + case PSERIES_WDTF_ACTION_DUMP_RESTART: > + w->action = timeoutAction; > + break; > + default: > + return H_PARAMETER; > + } > + w->leave_others = FIELD_EX64(flags, PSERIES_WDTF, LEAVE_OTHER); > + timer_mod(&w->timer, > + qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL) + timeoutInMs); > + trace_spapr_watchdog_start(flags, watchdogNumber, timeoutInMs); > + break; > + case PSERIES_WDTF_OP_STOP: > + if (watchdogNumber == PSERIES_WDT_STOP_ALL) { > + ret = watchdog_stop_all(spapr); > + } else if (watchdogNumber <= ARRAY_SIZE(spapr->wds)) { > + ret = watchdog_stop(watchdogNumber, > + &spapr->wds[watchdogNumber - 1]); > + } else { > + return H_P2; > + } > + break; > + case PSERIES_WDTF_OP_QUERY: > + args[0] = FIELD_DP64(0, PSERIES_WDTQ, MIN_TIMEOUT, WDT_MIN_TIMEOUT); > + args[0] = FIELD_DP64(args[0], PSERIES_WDTQ, NUM, > + ARRAY_SIZE(spapr->wds)); > + trace_spapr_watchdog_query(args[0]); > + break; > + case PSERIES_WDTF_OP_QUERY_LPM: > + if (watchdogNumber > ARRAY_SIZE(spapr->wds)) { > + return H_P2; > + } > + args[0] = PSERIES_WDTQL_QUERY_NOT_STOPPED; > + trace_spapr_watchdog_query_lpm(args[0]); > + break; > + default: > + return H_PARAMETER; > + } > + > + return ret; > +} > + > +void spapr_watchdog_init(SpaprMachineState *spapr) > +{ > + int i; > + > + for (i = 0; i < ARRAY_SIZE(spapr->wds); ++i) { > + char name[16]; > + SpaprWatchdog *w = &spapr->wds[i]; > + > + snprintf(name, sizeof(name) - 1, "wdt%d", i + 1); > + object_initialize_child_with_props(OBJECT(spapr), name, w, > + sizeof(SpaprWatchdog), > + TYPE_SPAPR_WDT, > + &error_fatal, NULL); > + qdev_realize(DEVICE(w), NULL, &error_fatal); > + } > +} > + > +static bool watchdog_needed(void *opaque) > +{ > + SpaprWatchdog *w = opaque; > + > + return timer_pending(&w->timer); > +} > + > +static const VMStateDescription vmstate_wdt = { > + .name = "spapr_watchdog", > + .version_id = 1, > + .minimum_version_id = 1, > + .needed = watchdog_needed, > + .fields = (VMStateField[]) { > + VMSTATE_TIMER(timer, SpaprWatchdog), > + VMSTATE_UINT8(action, SpaprWatchdog), > + VMSTATE_UINT8(leave_others, SpaprWatchdog), > + VMSTATE_END_OF_LIST() > + } > +}; > + > +static void spapr_wdt_realize(DeviceState *dev, Error **errp) > +{ > + SpaprWatchdog *w = SPAPR_WDT(dev); > + Object *o = OBJECT(dev); > + > + timer_init_ms(&w->timer, QEMU_CLOCK_VIRTUAL, watchdog_expired, w); > + > + object_property_add_uint64_ptr(o, "expire", > + (uint64_t *)&w->timer.expire_time, > + OBJ_PROP_FLAG_READ); > + object_property_add_uint8_ptr(o, "action", &w->action, OBJ_PROP_FLAG_READ); > + object_property_add_uint8_ptr(o, "leaveOtherWatchdogsRunningOnTimeout", > + &w->leave_others, OBJ_PROP_FLAG_READ); > +} > + > +static void spapr_wdt_class_init(ObjectClass *oc, void *data) > +{ > + DeviceClass *dc = DEVICE_CLASS(oc); > + > + dc->realize = spapr_wdt_realize; > + dc->vmsd = &vmstate_wdt; > + dc->user_creatable = false; > +} > + > +static const TypeInfo spapr_wdt_info = { > + .name = TYPE_SPAPR_WDT, > + .parent = TYPE_DEVICE, > + .instance_size = sizeof(SpaprWatchdog), > + .class_init = spapr_wdt_class_init, > +}; > + > +static void spapr_watchdog_register_types(void) > +{ > + spapr_register_hypercall(H_WATCHDOG, h_watchdog); > + type_register_static(&spapr_wdt_info); > +} > + > +type_init(spapr_watchdog_register_types) > diff --git a/hw/watchdog/meson.build b/hw/watchdog/meson.build > index 054c403dea7c..8974b5cf4c8a 100644 > --- a/hw/watchdog/meson.build > +++ b/hw/watchdog/meson.build > @@ -6,3 +6,4 @@ softmmu_ss.add(when: 'CONFIG_WDT_DIAG288', if_true: files('wdt_diag288.c')) > softmmu_ss.add(when: 'CONFIG_ASPEED_SOC', if_true: files('wdt_aspeed.c')) > softmmu_ss.add(when: 'CONFIG_WDT_IMX2', if_true: files('wdt_imx2.c')) > softmmu_ss.add(when: 'CONFIG_WDT_SBSA', if_true: files('sbsa_gwdt.c')) > +specific_ss.add(when: 'CONFIG_PSERIES', if_true: files('spapr_watchdog.c')) > diff --git a/hw/watchdog/trace-events b/hw/watchdog/trace-events > index e7523e22aaf2..89ccbcfdfd20 100644 > --- a/hw/watchdog/trace-events > +++ b/hw/watchdog/trace-events > @@ -9,3 +9,10 @@ cmsdk_apb_watchdog_lock(uint32_t lock) "CMSDK APB watchdog: lock %" PRIu32 > # wdt-aspeed.c > aspeed_wdt_read(uint64_t addr, uint32_t size) "@0x%" PRIx64 " size=%d" > aspeed_wdt_write(uint64_t addr, uint32_t size, uint64_t data) "@0x%" PRIx64 " size=%d value=0x%"PRIx64 > + > +# spapr_watchdog.c > +spapr_watchdog_start(uint64_t flags, uint64_t num, uint64_t timeout) "Flags 0x%" PRIx64 " num=%" PRId64 " %" PRIu64 "ms" > +spapr_watchdog_stop(uint64_t num, uint64_t ret) "num=%" PRIu64 " ret=%" PRId64 > +spapr_watchdog_query(uint64_t caps) "caps=0x%" PRIx64 > +spapr_watchdog_query_lpm(uint64_t caps) "caps=0x%" PRIx64 > +spapr_watchdog_expired(uint64_t num, unsigned action) "num=%" PRIu64 " action=%u"
On 6/22/22 07:10, Alexey Kardashevskiy wrote: > The new PAPR 2.12 defines a watchdog facility managed via the new > H_WATCHDOG hypercall. > > This adds H_WATCHDOG support which a proposed driver for pseries uses: > https://patchwork.ozlabs.org/project/linuxppc-dev/list/?series=303120 > > This was tested by running QEMU with a debug kernel and command line: > -append \ > "pseries-wdt.timeout=60 pseries-wdt.nowayout=1 pseries-wdt.action=2" > > and running "echo V > /dev/watchdog0" inside the VM. > > Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Reviewed-by: Cédric Le Goater <clg@kaod.org> Thanks, C. > --- > Changes: > v3: > * removed @num from SpaprWatchdog > * reworked to use standard FIELD_EX/FIELD_OP > * expire_time is a property now > * added handling of leaveOtherWatchdogsRunningOnTimeout > > v2: > * QOM'ed timers, "action" and "expire" are available via QMP > * removed @timeout from SpaprWatchdog > * moved the driver to hw/watchdog > * fixed error handling in the hcall handler > * used new SETFIELD/GETFIELD > --- > include/hw/ppc/spapr.h | 25 +++- > hw/ppc/spapr.c | 4 + > hw/watchdog/spapr_watchdog.c | 274 +++++++++++++++++++++++++++++++++++ > hw/watchdog/meson.build | 1 + > hw/watchdog/trace-events | 7 + > 5 files changed, 310 insertions(+), 1 deletion(-) > create mode 100644 hw/watchdog/spapr_watchdog.c > > diff --git a/include/hw/ppc/spapr.h b/include/hw/ppc/spapr.h > index 072dda2c7265..891be79604fe 100644 > --- a/include/hw/ppc/spapr.h > +++ b/include/hw/ppc/spapr.h > @@ -164,6 +164,21 @@ struct SpaprMachineClass { > SpaprIrq *irq; > }; > > +#define WDT_MAX_WATCHDOGS 4 /* Maximum number of watchdog devices */ > + > +#define TYPE_SPAPR_WDT "spapr-wdt" > +OBJECT_DECLARE_SIMPLE_TYPE(SpaprWatchdog, SPAPR_WDT) > + > +typedef struct SpaprWatchdog { > + /*< private >*/ > + DeviceState parent_obj; > + /*< public >*/ > + > + QEMUTimer timer; > + uint8_t action; /* One of PSERIES_WDTF_ACTION_xxx */ > + uint8_t leave_others; /* leaveOtherWatchdogsRunningOnTimeout */ > +} SpaprWatchdog; > + > /** > * SpaprMachineState: > */ > @@ -264,6 +279,8 @@ struct SpaprMachineState { > uint32_t FORM2_assoc_array[NUMA_NODES_MAX_NUM][FORM2_NUMA_ASSOC_SIZE]; > > Error *fwnmi_migration_blocker; > + > + SpaprWatchdog wds[WDT_MAX_WATCHDOGS]; > }; > > #define H_SUCCESS 0 > @@ -344,6 +361,7 @@ struct SpaprMachineState { > #define H_P7 -60 > #define H_P8 -61 > #define H_P9 -62 > +#define H_NOOP -63 > #define H_UNSUPPORTED -67 > #define H_OVERLAP -68 > #define H_UNSUPPORTED_FLAG -256 > @@ -564,8 +582,9 @@ struct SpaprMachineState { > #define H_SCM_HEALTH 0x400 > #define H_RPT_INVALIDATE 0x448 > #define H_SCM_FLUSH 0x44C > +#define H_WATCHDOG 0x45C > > -#define MAX_HCALL_OPCODE H_SCM_FLUSH > +#define MAX_HCALL_OPCODE H_WATCHDOG > > /* The hcalls above are standardized in PAPR and implemented by pHyp > * as well. > @@ -1027,6 +1046,7 @@ extern const VMStateDescription vmstate_spapr_cap_large_decr; > extern const VMStateDescription vmstate_spapr_cap_ccf_assist; > extern const VMStateDescription vmstate_spapr_cap_fwnmi; > extern const VMStateDescription vmstate_spapr_cap_rpt_invalidate; > +extern const VMStateDescription vmstate_spapr_wdt; > > static inline uint8_t spapr_get_cap(SpaprMachineState *spapr, int cap) > { > @@ -1063,4 +1083,7 @@ target_ulong spapr_vof_client_architecture_support(MachineState *ms, > target_ulong ovec_addr); > void spapr_vof_client_dt_finalize(SpaprMachineState *spapr, void *fdt); > > +/* H_WATCHDOG */ > +void spapr_watchdog_init(SpaprMachineState *spapr); > + > #endif /* HW_SPAPR_H */ > diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c > index fd4942e8813c..9a5382d5270f 100644 > --- a/hw/ppc/spapr.c > +++ b/hw/ppc/spapr.c > @@ -898,6 +898,8 @@ static void spapr_dt_rtas(SpaprMachineState *spapr, void *fdt) > add_str(hypertas, "hcall-hpt-resize"); > } > > + add_str(hypertas, "hcall-watchdog"); > + > _FDT(fdt_setprop(fdt, rtas, "ibm,hypertas-functions", > hypertas->str, hypertas->len)); > g_string_free(hypertas, TRUE); > @@ -3051,6 +3053,8 @@ static void spapr_machine_init(MachineState *machine) > spapr->vof->fw_size = fw_size; /* for claim() on itself */ > spapr_register_hypercall(KVMPPC_H_VOF_CLIENT, spapr_h_vof_client); > } > + > + spapr_watchdog_init(spapr); > } > > #define DEFAULT_KVM_TYPE "auto" > diff --git a/hw/watchdog/spapr_watchdog.c b/hw/watchdog/spapr_watchdog.c > new file mode 100644 > index 000000000000..55ff1f03c1da > --- /dev/null > +++ b/hw/watchdog/spapr_watchdog.c > @@ -0,0 +1,274 @@ > +/* > + * This library is free software; you can redistribute it and/or > + * modify it under the terms of the GNU Lesser General Public > + * License as published by the Free Software Foundation; either > + * version 2.1 of the License, or (at your option) any later version. > + * > + * This library is distributed in the hope that it will be useful, > + * but WITHOUT ANY WARRANTY; without even the implied warranty of > + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU > + * Lesser General Public License for more details. > + * > + * You should have received a copy of the GNU Lesser General Public > + * License along with this library; if not, see <http://www.gnu.org/licenses/>. > + */ > + > +#include "qemu/osdep.h" > +#include "qapi/error.h" > +#include "target/ppc/cpu.h" > +#include "migration/vmstate.h" > +#include "trace.h" > + > +#include "hw/ppc/spapr.h" > + > +#define FIELD_BE(reg, field, start, len) \ > + FIELD(reg, field, 64 - (start + len), len) > + > +/* > + * Bits 47: "leaveOtherWatchdogsRunningOnTimeout", specified on > + * the "Start watchdog" operation, > + * 0 - stop out-standing watchdogs on timeout, > + * 1 - leave outstanding watchdogs running on timeout > + */ > +FIELD_BE(PSERIES_WDTF, LEAVE_OTHER, 47, 1) > + > +/* Bits 48-55: "operation" */ > +FIELD_BE(PSERIES_WDTF, OP, 48, 8) > +#define PSERIES_WDTF_OP_START 0x1 > +#define PSERIES_WDTF_OP_STOP 0x2 > +#define PSERIES_WDTF_OP_QUERY 0x3 > +#define PSERIES_WDTF_OP_QUERY_LPM 0x4 > + > +/* Bits 56-63: "timeoutAction" */ > +FIELD_BE(PSERIES_WDTF, ACTION, 56, 8) > +#define PSERIES_WDTF_ACTION_HARD_POWER_OFF 0x1 > +#define PSERIES_WDTF_ACTION_HARD_RESTART 0x2 > +#define PSERIES_WDTF_ACTION_DUMP_RESTART 0x3 > + > +FIELD_BE(PSERIES_WDTF, RESERVED, 0, 47) > + > +/* Special watchdogNumber for the "stop all watchdogs" operation */ > +#define PSERIES_WDT_STOP_ALL ((uint64_t)~0) > + > +/* > + * For the "Query watchdog capabilities" operation, a uint64 structure > + * defined as: > + * Bits 0-15: The minimum supported timeout in milliseconds > + * Bits 16-31: The number of watchdogs supported > + * Bits 32-63: Reserved > + */ > +FIELD_BE(PSERIES_WDTQ, MIN_TIMEOUT, 0, 16) > +FIELD_BE(PSERIES_WDTQ, NUM, 16, 16) > + > +/* > + * For the "Query watchdog LPM requirement" operation: > + * 1 = The given "watchdogNumber" must be stopped prior to suspending > + * 2 = The given "watchdogNumber" does not have to be stopped prior to > + * suspending > + */ > +#define PSERIES_WDTQL_STOPPED 1 > +#define PSERIES_WDTQL_QUERY_NOT_STOPPED 2 > + > +#define WDT_MIN_TIMEOUT 1 /* 1ms */ > + > +static target_ulong watchdog_stop(unsigned watchdogNumber, SpaprWatchdog *w) > +{ > + target_ulong ret = H_NOOP; > + > + if (timer_pending(&w->timer)) { > + timer_del(&w->timer); > + ret = H_SUCCESS; > + } > + trace_spapr_watchdog_stop(watchdogNumber, ret); > + > + return ret; > +} > + > +static target_ulong watchdog_stop_all(SpaprMachineState *spapr) > +{ > + target_ulong ret = H_NOOP; > + int i; > + > + for (i = 1; i <= ARRAY_SIZE(spapr->wds); ++i) { > + target_ulong r = watchdog_stop(i, &spapr->wds[i - 1]); > + > + if (r != H_NOOP && r != H_SUCCESS) { > + ret = r; > + } > + } > + > + return ret; > +} > + > +static void watchdog_expired(void *pw) > +{ > + SpaprWatchdog *w = pw; > + CPUState *cs; > + SpaprMachineState *spapr = SPAPR_MACHINE(qdev_get_machine()); > + unsigned num = w - spapr->wds; > + > + g_assert(num < ARRAY_SIZE(spapr->wds)); > + trace_spapr_watchdog_expired(num, w->action); > + switch (w->action) { > + case PSERIES_WDTF_ACTION_HARD_POWER_OFF: > + qemu_system_vmstop_request(RUN_STATE_SHUTDOWN); > + break; > + case PSERIES_WDTF_ACTION_HARD_RESTART: > + qemu_system_reset_request(SHUTDOWN_CAUSE_GUEST_RESET); > + break; > + case PSERIES_WDTF_ACTION_DUMP_RESTART: > + CPU_FOREACH(cs) { > + async_run_on_cpu(cs, spapr_do_system_reset_on_cpu, RUN_ON_CPU_NULL); > + } > + break; > + } > + if (!w->leave_others) { > + watchdog_stop_all(spapr); > + } > +} > + > +static target_ulong h_watchdog(PowerPCCPU *cpu, > + SpaprMachineState *spapr, > + target_ulong opcode, target_ulong *args) > +{ > + target_ulong ret = H_SUCCESS; > + target_ulong flags = args[0]; > + target_ulong watchdogNumber = args[1]; /* 1-Based per PAPR */ > + target_ulong timeoutInMs = args[2]; > + unsigned operation = FIELD_EX64(flags, PSERIES_WDTF, OP); > + unsigned timeoutAction = FIELD_EX64(flags, PSERIES_WDTF, ACTION); > + SpaprWatchdog *w; > + > + if (FIELD_EX64(flags, PSERIES_WDTF, RESERVED)) { > + return H_PARAMETER; > + } > + > + switch (operation) { > + case PSERIES_WDTF_OP_START: > + if (watchdogNumber > ARRAY_SIZE(spapr->wds)) { > + return H_P2; > + } > + if (timeoutInMs <= WDT_MIN_TIMEOUT) { > + return H_P3; > + } > + > + w = &spapr->wds[watchdogNumber - 1]; > + switch (timeoutAction) { > + case PSERIES_WDTF_ACTION_HARD_POWER_OFF: > + case PSERIES_WDTF_ACTION_HARD_RESTART: > + case PSERIES_WDTF_ACTION_DUMP_RESTART: > + w->action = timeoutAction; > + break; > + default: > + return H_PARAMETER; > + } > + w->leave_others = FIELD_EX64(flags, PSERIES_WDTF, LEAVE_OTHER); > + timer_mod(&w->timer, > + qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL) + timeoutInMs); > + trace_spapr_watchdog_start(flags, watchdogNumber, timeoutInMs); > + break; > + case PSERIES_WDTF_OP_STOP: > + if (watchdogNumber == PSERIES_WDT_STOP_ALL) { > + ret = watchdog_stop_all(spapr); > + } else if (watchdogNumber <= ARRAY_SIZE(spapr->wds)) { > + ret = watchdog_stop(watchdogNumber, > + &spapr->wds[watchdogNumber - 1]); > + } else { > + return H_P2; > + } > + break; > + case PSERIES_WDTF_OP_QUERY: > + args[0] = FIELD_DP64(0, PSERIES_WDTQ, MIN_TIMEOUT, WDT_MIN_TIMEOUT); > + args[0] = FIELD_DP64(args[0], PSERIES_WDTQ, NUM, > + ARRAY_SIZE(spapr->wds)); > + trace_spapr_watchdog_query(args[0]); > + break; > + case PSERIES_WDTF_OP_QUERY_LPM: > + if (watchdogNumber > ARRAY_SIZE(spapr->wds)) { > + return H_P2; > + } > + args[0] = PSERIES_WDTQL_QUERY_NOT_STOPPED; > + trace_spapr_watchdog_query_lpm(args[0]); > + break; > + default: > + return H_PARAMETER; > + } > + > + return ret; > +} > + > +void spapr_watchdog_init(SpaprMachineState *spapr) > +{ > + int i; > + > + for (i = 0; i < ARRAY_SIZE(spapr->wds); ++i) { > + char name[16]; > + SpaprWatchdog *w = &spapr->wds[i]; > + > + snprintf(name, sizeof(name) - 1, "wdt%d", i + 1); > + object_initialize_child_with_props(OBJECT(spapr), name, w, > + sizeof(SpaprWatchdog), > + TYPE_SPAPR_WDT, > + &error_fatal, NULL); > + qdev_realize(DEVICE(w), NULL, &error_fatal); > + } > +} > + > +static bool watchdog_needed(void *opaque) > +{ > + SpaprWatchdog *w = opaque; > + > + return timer_pending(&w->timer); > +} > + > +static const VMStateDescription vmstate_wdt = { > + .name = "spapr_watchdog", > + .version_id = 1, > + .minimum_version_id = 1, > + .needed = watchdog_needed, > + .fields = (VMStateField[]) { > + VMSTATE_TIMER(timer, SpaprWatchdog), > + VMSTATE_UINT8(action, SpaprWatchdog), > + VMSTATE_UINT8(leave_others, SpaprWatchdog), > + VMSTATE_END_OF_LIST() > + } > +}; > + > +static void spapr_wdt_realize(DeviceState *dev, Error **errp) > +{ > + SpaprWatchdog *w = SPAPR_WDT(dev); > + Object *o = OBJECT(dev); > + > + timer_init_ms(&w->timer, QEMU_CLOCK_VIRTUAL, watchdog_expired, w); > + > + object_property_add_uint64_ptr(o, "expire", > + (uint64_t *)&w->timer.expire_time, > + OBJ_PROP_FLAG_READ); > + object_property_add_uint8_ptr(o, "action", &w->action, OBJ_PROP_FLAG_READ); > + object_property_add_uint8_ptr(o, "leaveOtherWatchdogsRunningOnTimeout", > + &w->leave_others, OBJ_PROP_FLAG_READ); > +} > + > +static void spapr_wdt_class_init(ObjectClass *oc, void *data) > +{ > + DeviceClass *dc = DEVICE_CLASS(oc); > + > + dc->realize = spapr_wdt_realize; > + dc->vmsd = &vmstate_wdt; > + dc->user_creatable = false; > +} > + > +static const TypeInfo spapr_wdt_info = { > + .name = TYPE_SPAPR_WDT, > + .parent = TYPE_DEVICE, > + .instance_size = sizeof(SpaprWatchdog), > + .class_init = spapr_wdt_class_init, > +}; > + > +static void spapr_watchdog_register_types(void) > +{ > + spapr_register_hypercall(H_WATCHDOG, h_watchdog); > + type_register_static(&spapr_wdt_info); > +} > + > +type_init(spapr_watchdog_register_types) > diff --git a/hw/watchdog/meson.build b/hw/watchdog/meson.build > index 054c403dea7c..8974b5cf4c8a 100644 > --- a/hw/watchdog/meson.build > +++ b/hw/watchdog/meson.build > @@ -6,3 +6,4 @@ softmmu_ss.add(when: 'CONFIG_WDT_DIAG288', if_true: files('wdt_diag288.c')) > softmmu_ss.add(when: 'CONFIG_ASPEED_SOC', if_true: files('wdt_aspeed.c')) > softmmu_ss.add(when: 'CONFIG_WDT_IMX2', if_true: files('wdt_imx2.c')) > softmmu_ss.add(when: 'CONFIG_WDT_SBSA', if_true: files('sbsa_gwdt.c')) > +specific_ss.add(when: 'CONFIG_PSERIES', if_true: files('spapr_watchdog.c')) > diff --git a/hw/watchdog/trace-events b/hw/watchdog/trace-events > index e7523e22aaf2..89ccbcfdfd20 100644 > --- a/hw/watchdog/trace-events > +++ b/hw/watchdog/trace-events > @@ -9,3 +9,10 @@ cmsdk_apb_watchdog_lock(uint32_t lock) "CMSDK APB watchdog: lock %" PRIu32 > # wdt-aspeed.c > aspeed_wdt_read(uint64_t addr, uint32_t size) "@0x%" PRIx64 " size=%d" > aspeed_wdt_write(uint64_t addr, uint32_t size, uint64_t data) "@0x%" PRIx64 " size=%d value=0x%"PRIx64 > + > +# spapr_watchdog.c > +spapr_watchdog_start(uint64_t flags, uint64_t num, uint64_t timeout) "Flags 0x%" PRIx64 " num=%" PRId64 " %" PRIu64 "ms" > +spapr_watchdog_stop(uint64_t num, uint64_t ret) "num=%" PRIu64 " ret=%" PRId64 > +spapr_watchdog_query(uint64_t caps) "caps=0x%" PRIx64 > +spapr_watchdog_query_lpm(uint64_t caps) "caps=0x%" PRIx64 > +spapr_watchdog_expired(uint64_t num, unsigned action) "num=%" PRIu64 " action=%u"
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