[PATCH RFC v4 15/15] target/riscv: Add time frequency migration support

If vcpu's time frequency is not specified by CPU option 'time-frequency' on the destination, the time frequency of destination will follow the source. If vcpu's time frequency specified by CPU option 'time-frequency' on the destination is different from migrated time frequency. The migration will be abort. Signed-off-by: Yifei Jiang <jiangyifei(a)huawei.com&gt; Signed-off-by: Yipeng Yin <yinyipeng1(a)huawei.com&gt; --- target/riscv/machine.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/target/riscv/machine.c b/target/riscv/machine.c index ef2d5395a8..6955542fef 100644 --- a/target/riscv/machine.c +++ b/target/riscv/machine.c @@ -144,6 +144,13 @@ static int cpu_post_load(void *opaque, int version_id) CPURISCVState *env = &cpu->env; env->kvm_timer_dirty = true; + + if (env->user_frequency && env->user_frequency != env->frequency) { + error_report("Mismatch between user-specified time frequency and " + "migrated time frequency"); + return -EINVAL; + } + return 0; } @@ -198,6 +205,7 @@ const VMStateDescription vmstate_riscv_cpu = { VMSTATE_UINT64(env.kvm_timer_time, RISCVCPU), VMSTATE_UINT64(env.kvm_timer_compare, RISCVCPU), VMSTATE_UINT64(env.kvm_timer_state, RISCVCPU), + VMSTATE_UINT64(env.frequency, RISCVCPU), VMSTATE_END_OF_LIST() }, -- 2.19.1