I don’t have anything in /proc but I have ACPI sensor in /sys and I can see it with sensors
as well:
[root@dom0 user]# cat /sys/class/thermal/thermal_zone0/hwmon0/name
acpitz
[root@dom0 user]# cat /sys/class/thermal/thermal_zone0/hwmon0/temp1_input
27800
[root@dom0 user]# sensors
acpitz-acpi-0
Adapter: ACPI interface
temp1: +27.8°C (crit = +105.0°C)
nvme-pci-0200
Adapter: PCI adapter
Composite: +25.9°C (low = -20.1°C, high = +89.8°C)
(crit = +94.8°C)
But this is not a CPU temperature but a temperature sensor on the motherboard near CPU socket.