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hw/cxl: Introduce cxl_device_get_timestamp() utility function

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There are new users of this functionality coming shortly so factor
it out from the GET_TIMESTAMP mailbox command handling.

Signed-off-by: Ira Weiny <ira.weiny@intel.com>
Reviewed-by: Fan Ni <fan.ni@samsung.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

Message-Id: <20230423162013.4535-3-Jonathan.Cameron@huawei.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Ira Weiny 2023-04-23 17:20:09 +01:00 • committed by Michael S. Tsirkin
parent b6aab45971
commit 547a652fd1
3 changed files with 18 additions and 10 deletions
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15
hw/cxl/cxl-device-utils.c
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@ -269,3 +269,18 @@ void cxl_device_register_init_common(CXLDeviceState *cxl_dstate)
cxl_initialize_mailbox(cxl_dstate);
}
uint64_t cxl_device_get_timestamp(CXLDeviceState *cxl_dstate)
{
uint64_t time, delta;
uint64_t final_time = 0;
if (cxl_dstate->timestamp.set) {
/* Find the delta from the last time the host set the time. */
time = qemu_clock_get_ns(QEMU_CLOCK_VIRTUAL);
delta = time - cxl_dstate->timestamp.last_set;
final_time = cxl_dstate->timestamp.host_set + delta;
}
return final_time;
}