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docs: update gofurther/checks

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lukas 2021-11-27 11:38:02 +00:00
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@ -2,7 +2,7 @@
title: Performs a few checks on Phyllome OS
description:
published: true
date: 2021-11-27T11:19:25.159Z
date: 2021-11-27T11:38:00.341Z
tags:
editor: markdown
dateCreated: 2021-11-13T11:39:13.790Z
@ -63,9 +63,60 @@ cat /proc/cpuinfo | grep svm '(vmx|svm)'
flags : fpu vme de [...] svm [...] sme sev sev_es
```
### Check if IOMMU groups have been created are present
## Validate specific features on the host
> Those commands are valid for only specific Phyllome OS editions
{.is-info}
{.is-info}
### IOMMU-related checks
If your computer ships with advanced hardware virtualization features (*AMD Vi* or Intel *VT-d*), Phyllome OS should have automatically activated them.
* Verify if that is the case by using the following command, courtesy of the [Archlinux wiki](https://wiki.archlinux.org/title/PCI_passthrough_via_OVMF#Enabling_IOMMU).
```
dmesg | grep -i -e DMAR -e IOMMU
```
* Make sure the result look like this:
```
[ 0.600228] iommu: Default domain type: Translated
[ 0.624416] pci 0000:00:00.2: AMD-Vi: IOMMU performance counters supported
[ 0.624444] pci 0000:00:01.0: Adding to iommu group 0
[...]
[ 0.624690] pci 0000:0b:00.4: Adding to iommu group 15
[ 0.627236] pci 0000:00:00.2: AMD-Vi: Found IOMMU cap 0x40
[ 0.627987] perf/amd_iommu: Detected AMD IOMMU #0 (2 banks, 4 counters/bank).
```
* You may also want to learn how isolated your devices are. To do that, use the following script, courtesy of the [Archlinux wiki](https://wiki.archlinux.org/title/PCI_passthrough_via_OVMF#Ensuring_that_the_groups_are_valid):
```
#!/bin/bash
shopt -s nullglob
for g in `find /sys/kernel/iommu_groups/* -maxdepth 0 -type d | sort -V`; do
echo "IOMMU Group ${g##*/}:"
for d in $g/devices/*; do
echo -e "\t$(lspci -nns ${d##*/})"
done;
done;
```
```
IOMMU Group 0:
[...]
01:00.0 Non-Volatile memory controller [0108]: Intel Corporation SSD 660P Series [8086:f1a8] (rev 03)
02:00.0 USB controller [0c03]: Advanced Micro Devices, Inc. [AMD] Device [1022:43ee]
02:00.1 SATA controller [0106]: Advanced Micro Devices, Inc. [AMD] Device [1022:43eb]
[...]
04:00.0 VGA compatible controller [0300]: NVIDIA Corporation GM107 [GeForce GTX 750] [10de:1381] (rev a2)
04:00.1 Audio device [0403]: NVIDIA Corporation GM107 High Definition Audio Controller [GeForce 940MX] [10de:0fbc] (rev a1)
07:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8125 2.5GbE Controller [10ec:8125] (rev 05)
IOMMU Group 1:
[...]
09:00.0 VGA compatible controller [0300]: NVIDIA Corporation GM204 [GeForce GTX 970] [10de:13c2] (rev a1)
09:00.1 Audio device [0403]: NVIDIA Corporation GM204 High Definition Audio Controller [10de:0fbb] (rev a1)
[...]
IOMMU Group 14:
0b:00.3 USB controller [0c03]: Advanced Micro Devices, Inc. [AMD] Matisse USB 3.0 Host Controller [1022:149c]
IOMMU Group 15:
0b:00.4 Audio device [0403]: Advanced Micro Devices, Inc. [AMD] Starship/Matisse HD Audio Controller [1022:1487]
```