Am 14.11.19 um 23:09 schrieb Rob Herring:

On Tue, Nov 12, 2019 at 4:47 AM Andreas Färber [off-list ref] wrote:

quoted

On the other hand, one might argue that such information should just be
parsed by EBBR-conformant bootloaders and be passed to the kernel via
standard UEFI interfaces and DMI tables. But I'm not aware of Barebox
having implemented any of that yet, and even for U-Boot (e.g., Realtek
based consumer devices...) not everyone has the GPL sources or tools to
update their bootloader. So, having the kernel we control gather
information relevant to kernel developers does make some sense to me.

UEFI and DMI are orthogonal, right. You can't expect DMI on a UEFI+DT system.

Not sure, that's why I CC'ed the EBBR folks for input. If it's not
mandatory today, the next revision of EBBR could just require it - if
that's the unified way between SBBR and EBBR. Little point in doing it
only for EBBR.

On my UEFI+DT based Raspberry Pi 3 Model B I do see it, note the
non-filled Processor Information delivered by U-Boot:

raspi3:~ # dmidecode
# dmidecode 3.2
Getting SMBIOS data from sysfs.
SMBIOS 3.0 present.
7 structures occupying 253 bytes.
Table at 0x3CB3E020.

Handle 0x0000, DMI type 0, 24 bytes
BIOS Information
	Vendor: U-Boot
	Version: 2019.10
	Release Date: 10/26/2019
	ROM Size: 64 kB
	Characteristics:
		PCI is supported
		BIOS is upgradeable
		Selectable boot is supported
		I2O boot is supported
		Targeted content distribution is supported

Handle 0x0001, DMI type 1, 27 bytes
System Information
	Manufacturer: raspberrypi
	Product Name: rpi
	Version: Not Specified
	Serial Number: 00000000********
	UUID: 30303030-3030-3030-6437-623461336666
	Wake-up Type: Reserved
	SKU Number: Not Specified
	Family: Not Specified

Handle 0x0002, DMI type 2, 14 bytes
Base Board Information
	Manufacturer: raspberrypi
	Product Name: rpi
	Version: Not Specified
	Serial Number: Not Specified
	Asset Tag: Not Specified
	Features:
		Board is a hosting board
	Location In Chassis: Not Specified
	Chassis Handle: 0x0000
	Type: Motherboard

Handle 0x0003, DMI type 3, 21 bytes
Chassis Information
	Manufacturer: raspberrypi
	Type: Desktop
	Lock: Not Present
	Version: Not Specified
	Serial Number: Not Specified
	Asset Tag: Not Specified
	Boot-up State: Safe
	Power Supply State: Safe
	Thermal State: Safe
	Security Status: None
	OEM Information: 0x00000000
	Height: Unspecified
	Number Of Power Cords: Unspecified
	Contained Elements: 0

Handle 0x0004, DMI type 4, 48 bytes
Processor Information
	Socket Designation: Not Specified
	Type: Central Processor
	Family: Unknown
	Manufacturer: Unknown
	ID: 00 00 00 00 00 00 00 00
	Version: Unknown
	Voltage: Unknown
	External Clock: Unknown
	Max Speed: Unknown
	Current Speed: Unknown
	Status: Unpopulated
	Upgrade: None
	L1 Cache Handle: Not Provided
	L2 Cache Handle: Not Provided
	L3 Cache Handle: Not Provided
	Serial Number: Not Specified
	Asset Tag: Not Specified
	Part Number: Not Specified
	Characteristics: None

Handle 0x0005, DMI type 32, 11 bytes
System Boot Information
	Status: No errors detected

Handle 0x0006, DMI type 127, 4 bytes
End Of Table


Regards,
Andreas

-- 
SUSE Software Solutions Germany GmbH
Maxfeldstr. 5, 90409 Nürnberg, Germany
GF: Felix Imendörffer
HRB 36809 (AG Nürnberg)

_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel