[Bug 221038] dev/amd_ecc_inject does not work with AMD ryzen

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=221038

--- Comment #3 from Don Lewis <truckman at FreeBSD.org> ---
I also get the "DRAM ECC is not supported or disabled" message.  I have booted
Linux on this machine and it claimed that EDAC was enabled, though admittedly I
haven't rechecked since my last BIOS upgrade.

My motherboard is a Gigabyte AX370-GAMING 5, which claims to support ECC.  I
have this ECC RAM installed:
  http://www.crucial.com/usa/en/ct4k16g4wfd824a
though dmidecode reports a strange value for total width:

# dmidecode -t memory
# dmidecode 3.0
Scanning /dev/mem for entry point.
SMBIOS 3.0 present.

Handle 0x0027, DMI type 16, 23 bytes
Physical Memory Array
        Location: System Board Or Motherboard
        Use: System Memory
        Error Correction Type: Multi-bit ECC
        Maximum Capacity: 64 GB
        Error Information Handle: 0x0026
        Number Of Devices: 4

Handle 0x002E, DMI type 17, 40 bytes
Memory Device
        Array Handle: 0x0027
        Error Information Handle: 0x002D
        Total Width: 128 bits
        Data Width: 64 bits
        Size: 16384 MB
        Form Factor: DIMM
        Set: None
        Locator: DIMM 0
        Bank Locator: CHANNEL A
        Type: DDR4
        Type Detail: Synchronous Unbuffered (Unregistered)
        Speed: 2400 MHz
        Manufacturer: Micron Technology
        Serial Number: 14C07593
        Asset Tag: Not Specified
        Part Number: 18ASF2G72AZ-2G3B1   
        Rank: 2
        Configured Clock Speed: 2400 MHz
        Minimum Voltage: 1.2 V
        Maximum Voltage: 1.2 V
        Configured Voltage: 1.2 V

Handle 0x0031, DMI type 17, 40 bytes
Memory Device
        Array Handle: 0x0027
        Error Information Handle: 0x0030
        Total Width: 128 bits
        Data Width: 64 bits
        Size: 16384 MB
        Form Factor: DIMM
        Set: None
        Locator: DIMM 1
        Bank Locator: CHANNEL A
        Type: DDR4
        Type Detail: Synchronous Unbuffered (Unregistered)
        Speed: 2400 MHz
        Manufacturer: Micron Technology
        Serial Number: 14C0753E
        Asset Tag: Not Specified
        Part Number: 18ASF2G72AZ-2G3B1   
        Rank: 2
        Configured Clock Speed: 2400 MHz
        Minimum Voltage: 1.2 V
        Maximum Voltage: 1.2 V
        Configured Voltage: 1.2 V

Handle 0x0034, DMI type 17, 40 bytes
Memory Device
        Array Handle: 0x0027
        Error Information Handle: 0x0033
        Total Width: 128 bits
        Data Width: 64 bits
        Size: 16384 MB
        Form Factor: DIMM
        Set: None
        Locator: DIMM 0
        Bank Locator: CHANNEL B
        Type: DDR4
        Type Detail: Synchronous Unbuffered (Unregistered)
        Speed: 2400 MHz
        Manufacturer: Micron Technology
        Serial Number: 14C07579
        Asset Tag: Not Specified
        Part Number: 18ASF2G72AZ-2G3B1   
        Rank: 2
        Configured Clock Speed: 2400 MHz
        Minimum Voltage: 1.2 V
        Maximum Voltage: 1.2 V
        Configured Voltage: 1.2 V

Handle 0x0037, DMI type 17, 40 bytes
Memory Device
        Array Handle: 0x0027
        Error Information Handle: 0x0036
        Total Width: 128 bits
        Data Width: 64 bits
        Size: 16384 MB
        Form Factor: DIMM
        Set: None
        Locator: DIMM 1
        Bank Locator: CHANNEL B
        Type: DDR4
        Type Detail: Synchronous Unbuffered (Unregistered)
        Speed: 2400 MHz
        Manufacturer: Micron Technology
        Serial Number: 14C07472
        Asset Tag: Not Specified
        Part Number: 18ASF2G72AZ-2G3B1   
        Rank: 2
        Configured Clock Speed: 2400 MHz
        Minimum Voltage: 1.2 V
        Maximum Voltage: 1.2 V
        Configured Voltage: 1.2 V

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