Hi guys,
thanks for replying!
On 07/21/2017 01:28 AM, Nico Huber wrote:
Hi,
On 20.07.2017 23:48, Pavel Alyev wrote:
Not at all. ME can control clock output frequency at GPIO 64/65/66/67. From coreboot you can only set these pins to NATIVE mode. So, if you EC/SIO take clock input from PCH, without ME they may work incorrectly.
you are right. I forgot that the ThinkPad EC is more a Super-I/O and may need the PCH to work (and not the other way around). And it's indeed connected to SUSCLK (GPIO62). Although I don't know what it does with that clock, it's possible that the ME messes with it.
But looks like at t530 this outputs sets in GPIO mode. David, can you dump gpios from system with running ME (can be done by 'inteltool -g').
Did that for both flashes, logs are attached (also includes journalctl and cbmem logs).
The only difference I noticed from the cbmem logs though was that apparently without ME coreboot only sees 8GB/16GB of memory? Still, the fan didn't spin without ME after a hard reset. It once again did spin before I did the hard reset...
I also tried to get the cbmem logs before the truncation note, but couldn't find out how to enable PRERAM_CBMEM_CONSOLE_SIZE (I guessed that's the relevant option).
inteltool -g shows a difference for only gpiobase+0x0000: 0x3962a5ff (GPIO_USE_SEL) <-- with ME gpiobase+0x0000: 0xb962a5ff (GPIO_USE_SEL) <-- without ME
@Flashing: I did use external flashing with the powered T530 in the past, but today it stopped working reliably for the 8M chip (the 4M still worked), so I switched to internal from Fedora now. flashrom reported verification success for that. Further details wrt external flashing method: https://mail.coreboot.org/pipermail/flashrom/2017-July/015043.html
Have a nice weekend!
David