Hi, This series is part of a bigger one I was preparing for a GSoC project, but unfortunately no student got interested.
The idea is to allow device with temperature sensors to use a common API with temperature operations. While guest are running, you can modify the temperatures to check the guest reactions. Some devices can trigger IRQ when temperature pass thresholds. Somehow similar to inject NMI. Some devices could also modify their temperature regarding their workload. The tsc2xxxx devices are interesting but can't be converted as they predate QOM/QDev. Temperature changes rate is <1Hz (not enforced in this model) so using a QMP to get/set is acceptable. The query-temperature-sensors command is for informative purpose, also acceptable for QMP use. Next step might be to publish QMP events when temperature change. The original goal is to better interface ADCs with real world data. Here using QMP is not an option. Here the idea is to use the AudioState and audio_sample API from "audio.h" but it seems not very used, see: https://bugs.launchpad.net/qemu/+bug/1861677 What is not clear yet to me is what's the best way to externally set a specific sensor temperature. The TMPxxx I2C sensors use object_property_set_int(). I could move that to the temp-sensor interface but it seems a bit overkill. Any simpler idea? Cc: Alex Bennée <alex.ben...@linaro.org> Cc: Paolo Bonzini <pbonz...@redhat.com> Cc: Keith Busch <keith.bu...@intel.com> Cc: Cédric Le Goater <c...@kaod.org> Cc: Joel Stanley <j...@jms.id.au> Cc: Guenter Roeck <li...@roeck-us.net> Cc: Joaquin de Andres <m...@xcancerberox.com.ar> Philippe Mathieu-Daudé (17): hw/misc: Introduce the temperature sensor interface hw/misc/temp-sensor: Add 'query-temperature-sensors' QMP command hw/misc/temp-sensor: Add 'info temp' HMP command hw/misc/tmp105: Extract get_temp_mC() and set_temp_mC() helpers hw/misc/tmp105: Implement the 'temperature-sensor' qdev interface hw/misc/tmp421: Add definition for SENSORS_COUNT hw/misc/tmp421: Extract get_temp_mC() helper hw/misc/tmp421: Extract set_temp_mC() helper hw/misc/tmp421: Implement the 'temperature-sensor' qdev interface hw/misc/bcm2835_thermal: Hold the temperature in the device state hw/misc/bcm2835_thermal: Implement the 'temperature-sensor' interface hw/misc/bcm2835_property: Hold the temperature in the device state hw/misc/bcm2835_property: Implement the 'temperature-sensor' interface hw/display/ads7846: Implement the 'temperature-sensor' qdev interface hw/ide/qdev: Implement the 'temperature-sensor' qdev interface hw/misc/imx6ul_ccm: Implement the 'temperature-sensor' qdev interface tests/qtest/tmp105-test: Trivial test for TempSensorClass qapi/misc.json | 24 +++++++ include/hw/misc/bcm2835_property.h | 1 + include/hw/misc/bcm2835_thermal.h | 1 + include/hw/misc/temp-sensor.h | 69 +++++++++++++++++++ include/monitor/hmp.h | 1 + hw/display/ads7846.c | 38 +++++++++++ hw/ide/qdev.c | 14 ++++ hw/misc/bcm2835_property.c | 39 ++++++++++- hw/misc/bcm2835_thermal.c | 42 ++++++++++-- hw/misc/imx6ul_ccm.c | 7 ++ hw/misc/temp-sensor.c | 102 +++++++++++++++++++++++++++++ hw/misc/tmp105.c | 51 +++++++++++---- hw/misc/tmp421.c | 74 ++++++++++++++++----- tests/qtest/tmp105-test.c | 18 +++++ MAINTAINERS | 6 ++ hmp-commands-info.hx | 11 ++++ hw/misc/Makefile.objs | 1 + 17 files changed, 463 insertions(+), 36 deletions(-) create mode 100644 include/hw/misc/temp-sensor.h create mode 100644 hw/misc/temp-sensor.c -- 2.21.1
