Dear Linux folks,
On the Dell OptiPlex 5055, Linux warns about an EFR mismatch in the
firmware.
```
[…]
[ 0.000000] DMI: Dell Inc. OptiPlex 5055 Ryzen CPU/0P03DX, BIOS
1.1.20 05/31/2019
[…]
[ 1.479774] smpboot: CPU0: AMD Ryzen 5 PRO 1500 Quad-Core Processor
(family: 0x17, model: 0x1, stepping: 0x1)
[…]
[ 2.507370] AMD-Vi: [Firmware Warn]: EFR mismatch. Use IVHD EFR
(0xf77ef22294ada : 0x400f77ef22294ada
).
[ 2.507381] pci 0000:00:00.2: AMD-Vi: IOMMU performance counters
supported
[ 2.525221] pci 0000:00:00.2: can't derive routing for PCI INT A
[ 2.531240] pci 0000:00:00.2: PCI INT A: not connected
[ 2.536415] pci 0000:00:01.0: Adding to iommu group 0
[ 2.541485] pci 0000:00:01.3: Adding to iommu group 1
[…]
```
The difference in the MMIO value is a prepended 0x400. Can that be
explained somehow?
If not, it’d be great, if you could give more details about the firmware
issue, so I can contact the Dell support to fix the firmware.
Kind regards,
Paul
[1]:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=a44092e326d403c7878018ba532369f84d31dbfa
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