#include "hw/timer/m48t59.h"
#include "qemu/log.h"
#include "qemu/error-report.h"
+#include "qapi/error.h"
#include "hw/loader.h"
#include "sysemu/kvm.h"
#include "kvm_ppc.h"
static inline void cpu_ppc_hdecr_excp(PowerPCCPU *cpu)
{
+ CPUPPCState *env = &cpu->env;
+
/* Raise it */
- LOG_TB("raise decrementer exception\n");
- ppc_set_irq(cpu, PPC_INTERRUPT_HDECR, 1);
+ LOG_TB("raise hv decrementer exception\n");
+
+ /* The architecture specifies that we don't deliver HDEC
+ * interrupts in a PM state. Not only they don't cause a
+ * wakeup but they also get effectively discarded.
+ */
+ if (!env->in_pm_state) {
+ ppc_set_irq(cpu, PPC_INTERRUPT_HDECR, 1);
+ }
}
static inline void cpu_ppc_hdecr_lower(PowerPCCPU *cpu)
cpu_ppc_store_purr(cpu, 0x0000000000000000ULL);
}
-static void timebase_pre_save(void *opaque)
+static void timebase_save(PPCTimebase *tb)
{
- PPCTimebase *tb = opaque;
uint64_t ticks = cpu_get_host_ticks();
PowerPCCPU *first_ppc_cpu = POWERPC_CPU(first_cpu);
return;
}
+ /* not used anymore, we keep it for compatibility */
tb->time_of_the_day_ns = qemu_clock_get_ns(QEMU_CLOCK_HOST);
/*
- * tb_offset is only expected to be changed by migration so
+ * tb_offset is only expected to be changed by QEMU so
* there is no need to update it from KVM here
*/
tb->guest_timebase = ticks + first_ppc_cpu->env.tb_env->tb_offset;
}
-static int timebase_post_load(void *opaque, int version_id)
+static void timebase_load(PPCTimebase *tb)
{
- PPCTimebase *tb_remote = opaque;
CPUState *cpu;
PowerPCCPU *first_ppc_cpu = POWERPC_CPU(first_cpu);
- int64_t tb_off_adj, tb_off, ns_diff;
- int64_t migration_duration_ns, migration_duration_tb, guest_tb, host_ns;
+ int64_t tb_off_adj, tb_off;
unsigned long freq;
if (!first_ppc_cpu->env.tb_env) {
error_report("No timebase object");
- return -1;
+ return;
}
freq = first_ppc_cpu->env.tb_env->tb_freq;
- /*
- * Calculate timebase on the destination side of migration.
- * The destination timebase must be not less than the source timebase.
- * We try to adjust timebase by downtime if host clocks are not
- * too much out of sync (1 second for now).
- */
- host_ns = qemu_clock_get_ns(QEMU_CLOCK_HOST);
- ns_diff = MAX(0, host_ns - tb_remote->time_of_the_day_ns);
- migration_duration_ns = MIN(NANOSECONDS_PER_SECOND, ns_diff);
- migration_duration_tb = muldiv64(migration_duration_ns, freq,
- NANOSECONDS_PER_SECOND);
- guest_tb = tb_remote->guest_timebase + MIN(0, migration_duration_tb);
- tb_off_adj = guest_tb - cpu_get_host_ticks();
+ tb_off_adj = tb->guest_timebase - cpu_get_host_ticks();
tb_off = first_ppc_cpu->env.tb_env->tb_offset;
trace_ppc_tb_adjust(tb_off, tb_off_adj, tb_off_adj - tb_off,
CPU_FOREACH(cpu) {
PowerPCCPU *pcpu = POWERPC_CPU(cpu);
pcpu->env.tb_env->tb_offset = tb_off_adj;
+#if defined(CONFIG_KVM)
+ kvm_set_one_reg(cpu, KVM_REG_PPC_TB_OFFSET,
+ &pcpu->env.tb_env->tb_offset);
+#endif
}
+}
- return 0;
+void cpu_ppc_clock_vm_state_change(void *opaque, int running,
+ RunState state)
+{
+ PPCTimebase *tb = opaque;
+
+ if (running) {
+ timebase_load(tb);
+ } else {
+ timebase_save(tb);
+ }
+}
+
+/*
+ * When migrating, read the clock just before migration,
+ * so that the guest clock counts during the events
+ * between:
+ *
+ * * vm_stop()
+ * *
+ * * pre_save()
+ *
+ * This reduces clock difference on migration from 5s
+ * to 0.1s (when max_downtime == 5s), because sending the
+ * final pages of memory (which happens between vm_stop()
+ * and pre_save()) takes max_downtime.
+ */
+static void timebase_pre_save(void *opaque)
+{
+ PPCTimebase *tb = opaque;
+
+ timebase_save(tb);
}
const VMStateDescription vmstate_ppc_timebase = {
.minimum_version_id = 1,
.minimum_version_id_old = 1,
.pre_save = timebase_pre_save,
- .post_load = timebase_post_load,
.fields = (VMStateField []) {
VMSTATE_UINT64(guest_timebase, PPCTimebase),
VMSTATE_INT64(time_of_the_day_ns, PPCTimebase),
}
/* Create new timer */
tb_env->decr_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, &cpu_ppc_decr_cb, cpu);
- if (0) {
- /* XXX: find a suitable condition to enable the hypervisor decrementer
- */
+ if (env->has_hv_mode) {
tb_env->hdecr_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, &cpu_ppc_hdecr_cb,
cpu);
} else {
}
/* Specific helpers for POWER & PowerPC 601 RTC */
-#if 0
-static clk_setup_cb cpu_ppc601_rtc_init (CPUPPCState *env)
-{
- return cpu_ppc_tb_init(env, 7812500);
-}
-#endif
-
void cpu_ppc601_store_rtcu (CPUPPCState *env, uint32_t value)
{
_cpu_ppc_store_tbu(env, value);
return NULL;
}
+
+void ppc_cpu_parse_features(const char *cpu_model)
+{
+ CPUClass *cc;
+ ObjectClass *oc;
+ const char *typename;
+ gchar **model_pieces;
+
+ model_pieces = g_strsplit(cpu_model, ",", 2);
+ if (!model_pieces[0]) {
+ error_report("Invalid/empty CPU model name");
+ exit(1);
+ }
+
+ oc = cpu_class_by_name(TYPE_POWERPC_CPU, model_pieces[0]);
+ if (oc == NULL) {
+ error_report("Unable to find CPU definition: %s", model_pieces[0]);
+ exit(1);
+ }
+
+ typename = object_class_get_name(oc);
+ cc = CPU_CLASS(oc);
+ cc->parse_features(typename, model_pieces[1], &error_fatal);
+ g_strfreev(model_pieces);
+}
projects / mirror_qemu.git / blobdiff