cpu-microcode-intel: no matching update found on Intel Core i3-1215U

[fastboot]

Hi,

I checked IA32_PLATFORM_ID:

cpucontrol -m 0x17 /dev/cpuctl0
MSR 0x17: 0x001c0000 0x00000000

Using bits 52:50:

(0x001c000000000000 >> 50) & 7 = 7

So this CPU appears to have platform ID 7, which corresponds to platform mask 0x80.

That means the relevant file should be 06-9a-04.80, not .40.

The .80 file is now present after cpu-microcode-intel-20260512_1, but the system still stays on microcode 0x432 and reports:

CPU microcode: no matching update found

[Patrick M. Hausen]

Are you sure there is a microcode update applicable to your CPU? Is there any way to check this with e.g. Intel docs?

[fastboot]

Are you sure there is a microcode update applicable to your CPU? Is there any way to check this with e.g. Intel docs?

I do not have Intel documentation directly mapping revisions to this specific CPU.

However, there is fairly strong evidence that newer microcode exists for CPUID 06-9a-04:

- Linux systems with the same CPU (Intel i3-1215U) have been observed running microcode 0x43a.
- My system remains on 0x432.
- After upgrading to cpu-microcode-intel-20260512_1, the package now provides both 06-9a-04.40 and 06-9a-04.80 split files.
- Reading IA32_PLATFORM_ID yields platform ID 7, which appears to correspond to platform mask 0x80.

For reference:

# cpucontrol -m 0x17 /dev/cpuctl0
MSR 0x17: 0x001c0000 0x00000000

which decodes to platform ID 7.

So at this point there seems to be strong evidence that a newer microcode should be applicable to this CPU, although I have not yet found Intel documentation explicitly confirming the exact revision mapping.

[Patrick M. Hausen]

However, there is fairly strong evidence that newer microcode exists for CPUID 06-9a-04:
[...]

OK. That's all I was asking. :-)