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-rw-r--r--hw/ppc/ppc.c79
-rw-r--r--hw/ppc/spapr.c4
-rw-r--r--include/hw/ppc/spapr.h1
-rw-r--r--target-ppc/cpu-qom.h16
-rw-r--r--target-ppc/kvm.c5
-rw-r--r--trace-events3
6 files changed, 106 insertions, 2 deletions
diff --git a/hw/ppc/ppc.c b/hw/ppc/ppc.c
index 71df471..bec82cd 100644
--- a/hw/ppc/ppc.c
+++ b/hw/ppc/ppc.c
@@ -29,9 +29,11 @@
#include "sysemu/cpus.h"
#include "hw/timer/m48t59.h"
#include "qemu/log.h"
+#include "qemu/error-report.h"
#include "hw/loader.h"
#include "sysemu/kvm.h"
#include "kvm_ppc.h"
+#include "trace.h"
//#define PPC_DEBUG_IRQ
//#define PPC_DEBUG_TB
@@ -49,6 +51,8 @@
# define LOG_TB(...) do { } while (0)
#endif
+#define NSEC_PER_SEC 1000000000LL
+
static void cpu_ppc_tb_stop (CPUPPCState *env);
static void cpu_ppc_tb_start (CPUPPCState *env);
@@ -829,6 +833,81 @@ static void cpu_ppc_set_tb_clk (void *opaque, uint32_t freq)
cpu_ppc_store_purr(cpu, 0x0000000000000000ULL);
}
+static void timebase_pre_save(void *opaque)
+{
+ PPCTimebase *tb = opaque;
+ uint64_t ticks = cpu_get_real_ticks();
+ PowerPCCPU *first_ppc_cpu = POWERPC_CPU(first_cpu);
+
+ if (!first_ppc_cpu->env.tb_env) {
+ error_report("No timebase object");
+ return;
+ }
+
+ tb->time_of_the_day_ns = get_clock_realtime();
+ /*
+ * tb_offset is only expected to be changed by migration 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)
+{
+ 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;
+ unsigned long freq;
+
+ if (!first_ppc_cpu->env.tb_env) {
+ error_report("No timebase object");
+ return -1;
+ }
+
+ 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 = get_clock_realtime();
+ ns_diff = MAX(0, host_ns - tb_remote->time_of_the_day_ns);
+ migration_duration_ns = MIN(NSEC_PER_SEC, ns_diff);
+ migration_duration_tb = muldiv64(migration_duration_ns, freq, NSEC_PER_SEC);
+ guest_tb = tb_remote->guest_timebase + MIN(0, migration_duration_tb);
+
+ tb_off_adj = guest_tb - cpu_get_real_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,
+ (tb_off_adj - tb_off) / freq);
+
+ /* Set new offset to all CPUs */
+ CPU_FOREACH(cpu) {
+ PowerPCCPU *pcpu = POWERPC_CPU(cpu);
+ pcpu->env.tb_env->tb_offset = tb_off_adj;
+ }
+
+ return 0;
+}
+
+const VMStateDescription vmstate_ppc_timebase = {
+ .name = "timebase",
+ .version_id = 1,
+ .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),
+ VMSTATE_END_OF_LIST()
+ },
+};
+
/* Set up (once) timebase frequency (in Hz) */
clk_setup_cb cpu_ppc_tb_init (CPUPPCState *env, uint32_t freq)
{
diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c
index adac5ff..fd7d8f7 100644
--- a/hw/ppc/spapr.c
+++ b/hw/ppc/spapr.c
@@ -817,14 +817,14 @@ static int spapr_vga_init(PCIBus *pci_bus)
static const VMStateDescription vmstate_spapr = {
.name = "spapr",
- .version_id = 1,
+ .version_id = 2,
.minimum_version_id = 1,
.fields = (VMStateField[]) {
VMSTATE_UINT32(next_irq, sPAPREnvironment),
/* RTC offset */
VMSTATE_UINT64(rtc_offset, sPAPREnvironment),
-
+ VMSTATE_PPC_TIMEBASE_V(tb, sPAPREnvironment, 2),
VMSTATE_END_OF_LIST()
},
};
diff --git a/include/hw/ppc/spapr.h b/include/hw/ppc/spapr.h
index 5fdac1e..9f8bb89 100644
--- a/include/hw/ppc/spapr.h
+++ b/include/hw/ppc/spapr.h
@@ -29,6 +29,7 @@ typedef struct sPAPREnvironment {
target_ulong entry_point;
uint32_t next_irq;
uint64_t rtc_offset;
+ struct PPCTimebase tb;
bool has_graphics;
uint32_t epow_irq;
diff --git a/target-ppc/cpu-qom.h b/target-ppc/cpu-qom.h
index 47dc8e6..d926d93 100644
--- a/target-ppc/cpu-qom.h
+++ b/target-ppc/cpu-qom.h
@@ -120,6 +120,22 @@ int ppc64_cpu_write_elf64_note(WriteCoreDumpFunction f, CPUState *cs,
int cpuid, void *opaque);
#ifndef CONFIG_USER_ONLY
extern const struct VMStateDescription vmstate_ppc_cpu;
+
+typedef struct PPCTimebase {
+ uint64_t guest_timebase;
+ int64_t time_of_the_day_ns;
+} PPCTimebase;
+
+extern const struct VMStateDescription vmstate_ppc_timebase;
+
+#define VMSTATE_PPC_TIMEBASE_V(_field, _state, _version) { \
+ .name = (stringify(_field)), \
+ .version_id = (_version), \
+ .size = sizeof(PPCTimebase), \
+ .vmsd = &vmstate_ppc_timebase, \
+ .flags = VMS_STRUCT, \
+ .offset = vmstate_offset_value(_state, _field, PPCTimebase), \
+}
#endif
#endif
diff --git a/target-ppc/kvm.c b/target-ppc/kvm.c
index 0744f51..ca31027 100644
--- a/target-ppc/kvm.c
+++ b/target-ppc/kvm.c
@@ -35,6 +35,7 @@
#include "hw/sysbus.h"
#include "hw/ppc/spapr.h"
#include "hw/ppc/spapr_vio.h"
+#include "hw/ppc/ppc.h"
#include "sysemu/watchdog.h"
#include "trace.h"
@@ -865,6 +866,8 @@ int kvm_arch_put_registers(CPUState *cs, int level)
DPRINTF("Warning: Unable to set VPA information to KVM\n");
}
}
+
+ kvm_set_one_reg(cs, KVM_REG_PPC_TB_OFFSET, &env->tb_env->tb_offset);
#endif /* TARGET_PPC64 */
}
@@ -1089,6 +1092,8 @@ int kvm_arch_get_registers(CPUState *cs)
DPRINTF("Warning: Unable to get VPA information from KVM\n");
}
}
+
+ kvm_get_one_reg(cs, KVM_REG_PPC_TB_OFFSET, &env->tb_env->tb_offset);
#endif
}
diff --git a/trace-events b/trace-events
index e984e76..b35c39b 100644
--- a/trace-events
+++ b/trace-events
@@ -1195,6 +1195,9 @@ spapr_iommu_get(uint64_t liobn, uint64_t ioba, uint64_t ret, uint64_t tce) "liob
spapr_iommu_xlate(uint64_t liobn, uint64_t ioba, uint64_t tce, unsigned perm, unsigned pgsize) "liobn=%"PRIx64" 0x%"PRIx64" -> 0x%"PRIx64" perm=%u mask=%x"
spapr_iommu_new_table(uint64_t liobn, void *tcet, void *table, int fd) "liobn=%"PRIx64" tcet=%p table=%p fd=%d"
+# hw/ppc/ppc.c
+ppc_tb_adjust(uint64_t offs1, uint64_t offs2, int64_t diff, int64_t seconds) "adjusted from 0x%"PRIx64" to 0x%"PRIx64", diff %"PRId64" (%"PRId64"s)"
+
# util/hbitmap.c
hbitmap_iter_skip_words(const void *hb, void *hbi, uint64_t pos, unsigned long cur) "hb %p hbi %p pos %"PRId64" cur 0x%lx"
hbitmap_reset(void *hb, uint64_t start, uint64_t count, uint64_t sbit, uint64_t ebit) "hb %p items %"PRIu64",%"PRIu64" bits %"PRIu64"..%"PRIu64
generated by cgit v1.1 at 2024-12-29 15:14:38 +0000