From 547a652fd1e10c2b6a2b9b91084e4c1cea8665a2 Mon Sep 17 00:00:00 2001 From: Ira Weiny Date: Sun, 23 Apr 2023 17:20:09 +0100 Subject: hw/cxl: Introduce cxl_device_get_timestamp() utility function 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 Reviewed-by: Fan Ni Signed-off-by: Jonathan Cameron Message-Id: <20230423162013.4535-3-Jonathan.Cameron@huawei.com> Reviewed-by: Michael S. Tsirkin Signed-off-by: Michael S. Tsirkin --- hw/cxl/cxl-device-utils.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) (limited to 'hw/cxl/cxl-device-utils.c') diff --git a/hw/cxl/cxl-device-utils.c b/hw/cxl/cxl-device-utils.c index 4c5e88aaf5..86e1cea8ce 100644 --- a/hw/cxl/cxl-device-utils.c +++ b/hw/cxl/cxl-device-utils.c @@ -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; +} -- cgit v1.2.3