AMD-Vi: Unable to read/write to IOMMU perf counter.

darkx97 · 2021-03-17 18:09:45

ive been trying to sort of play around with pci passthrough

i enabled IOMMU on my motherboard , and updated the grub config

 GRUB_CMDLINE_LINUX_DEFAULT="amdgpu.ppfeaturemask=0xffffffff amdgpu.dpm=1 amd_iommu=on iommu=pt video=HDMI-A-0:e video=HDMI-A-1:e loglevel=3 "

then i've done

update-grub

then restarted my pc .
and when i checked if my done things right

 sudo dmesg | grep -i -e DMAR -e IOMMU

i noticed that i got this

[    0.000000] Command line: BOOT_IMAGE=/boot/vmlinuz-linux root=UUID=190988e3-d4df-4384-93a4-8b6d987db6c9 rw amdgpu.ppfeaturemask=0xffffffff amdgpu.dpm=1 amd_iommu=on iommu=pt video=HDMI-A-0:e video=HDMI-A-1:e loglevel=3
[    0.039825] Kernel command line: BOOT_IMAGE=/boot/vmlinuz-linux root=UUID=190988e3-d4df-4384-93a4-8b6d987db6c9 rw amdgpu.ppfeaturemask=0xffffffff amdgpu.dpm=1 amd_iommu=on iommu=pt video=HDMI-A-0:e video=HDMI-A-1:e loglevel=3
[    0.255574] iommu: Default domain type: Passthrough (set via kernel command line)
[    0.313218] pci 0000:00:00.2: AMD-Vi: Unable to read/write to IOMMU perf counter.
[    0.313329] pci 0000:00:01.0: Adding to iommu group 0
[    0.313339] pci 0000:00:01.1: Adding to iommu group 1
[    0.313347] pci 0000:00:01.2: Adding to iommu group 2
[    0.313358] pci 0000:00:08.0: Adding to iommu group 3
[    0.313364] pci 0000:00:08.1: Adding to iommu group 3
[    0.313376] pci 0000:00:14.0: Adding to iommu group 4
[    0.313382] pci 0000:00:14.3: Adding to iommu group 4
[    0.313408] pci 0000:00:18.0: Adding to iommu group 5
[    0.313414] pci 0000:00:18.1: Adding to iommu group 5
[    0.313420] pci 0000:00:18.2: Adding to iommu group 5
[    0.313427] pci 0000:00:18.3: Adding to iommu group 5
[    0.313433] pci 0000:00:18.4: Adding to iommu group 5
[    0.313439] pci 0000:00:18.5: Adding to iommu group 5
[    0.313445] pci 0000:00:18.6: Adding to iommu group 5
[    0.313451] pci 0000:00:18.7: Adding to iommu group 5
[    0.313473] pci 0000:01:00.0: Adding to iommu group 6
[    0.313481] pci 0000:01:00.1: Adding to iommu group 6
[    0.313497] pci 0000:02:00.0: Adding to iommu group 7
[    0.313505] pci 0000:02:00.1: Adding to iommu group 7
[    0.313513] pci 0000:02:00.2: Adding to iommu group 7
[    0.313516] pci 0000:03:00.0: Adding to iommu group 7
[    0.313519] pci 0000:03:04.0: Adding to iommu group 7
[    0.313522] pci 0000:03:05.0: Adding to iommu group 7
[    0.313525] pci 0000:03:06.0: Adding to iommu group 7
[    0.313528] pci 0000:03:07.0: Adding to iommu group 7
[    0.313531] pci 0000:08:00.0: Adding to iommu group 7
[    0.313537] pci 0000:09:00.0: Adding to iommu group 3
[    0.313540] pci 0000:09:00.2: Adding to iommu group 3
[    0.313542] pci 0000:09:00.3: Adding to iommu group 3
[    0.313545] pci 0000:09:00.4: Adding to iommu group 3
[    0.313548] pci 0000:09:00.6: Adding to iommu group 3
[    0.313942] pci 0000:00:00.2: AMD-Vi: Found IOMMU cap 0x40
[    0.382985] AMD-Vi: AMD IOMMUv2 driver by Joerg Roedel <jroedel@suse.de>

EDIT: {
what im not sure about is
this line here

[    0.313218] pci 0000:00:00.2: AMD-Vi: Unable to read/write to IOMMU perf counter.

}

im not im not sure if its something i've done wrong , or if my board or cpu dosent support what im trying to do

i tried looking for old forums but all of them where relate to laptop issues , they where not trying to pass anything
my system :

Kernel: 5.11.6-arch1-1
CPU: AMD Ryzen 3 3200G (4) @ 4.100GHz
GPU: AMD ATI Radeon RX 470/480/570/570X/580/580X/590
Memory: 15910MiB
motherboard : asus prime b450m-a

EDIT : no one replied yet
{
and i did try to check for the pci groups .
using what was in the PCI passthrough wiki gude thing

 
#!/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;

and thats what i got .

 
IOMMU Group 0:
        00:01.0 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-1fh) PCIe Dummy Host Bridge [1022:1452]
IOMMU Group 1:
        00:01.1 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Raven/Raven2 PCIe GPP Bridge [6:0] [1022:15d3]
IOMMU Group 2:
        00:01.2 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Raven/Raven2 PCIe GPP Bridge [6:0] [1022:15d3]
IOMMU Group 3:
        00:08.0 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-1fh) PCIe Dummy Host Bridge [1022:1452]
        00:08.1 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] Raven/Raven2 Internal PCIe GPP Bridge 0 to Bus A [1022:15db]
        09:00.0 Non-Essential Instrumentation [1300]: Advanced Micro Devices, Inc. [AMD] Zeppelin/Raven/Raven2 PCIe Dummy Function [1022:145a] (rev c9)
        09:00.2 Encryption controller [1080]: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 10h-1fh) Platform Security Processor [1022:15df]
        09:00.3 USB controller [0c03]: Advanced Micro Devices, Inc. [AMD] Raven USB 3.1 [1022:15e0]
        09:00.4 USB controller [0c03]: Advanced Micro Devices, Inc. [AMD] Raven USB 3.1 [1022:15e1]
        09:00.6 Audio device [0403]: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 10h-1fh) HD Audio Controller [1022:15e3]
IOMMU Group 4:
        00:14.0 SMBus [0c05]: Advanced Micro Devices, Inc. [AMD] FCH SMBus Controller [1022:790b] (rev 61)
        00:14.3 ISA bridge [0601]: Advanced Micro Devices, Inc. [AMD] FCH LPC Bridge [1022:790e] (rev 51)
IOMMU Group 5:
        00:18.0 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Raven/Raven2 Device 24: Function 0 [1022:15e8]
        00:18.1 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Raven/Raven2 Device 24: Function 1 [1022:15e9]
        00:18.2 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Raven/Raven2 Device 24: Function 2 [1022:15ea]
        00:18.3 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Raven/Raven2 Device 24: Function 3 [1022:15eb]
        00:18.4 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Raven/Raven2 Device 24: Function 4 [1022:15ec]
        00:18.5 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Raven/Raven2 Device 24: Function 5 [1022:15ed]
        00:18.6 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Raven/Raven2 Device 24: Function 6 [1022:15ee]
        00:18.7 Host bridge [0600]: Advanced Micro Devices, Inc. [AMD] Raven/Raven2 Device 24: Function 7 [1022:15ef]
IOMMU Group 6:
        01:00.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc. [AMD/ATI] Ellesmere [Radeon RX 470/480/570/570X/580/580X/590] [1002:67df] (rev e7)
        01:00.1 Audio device [0403]: Advanced Micro Devices, Inc. [AMD/ATI] Ellesmere HDMI Audio [Radeon RX 470/480 / 570/580/590] [1002:aaf0]
IOMMU Group 7:
        02:00.0 USB controller [0c03]: Advanced Micro Devices, Inc. [AMD] 400 Series Chipset USB 3.1 XHCI Controller [1022:43d5] (rev 01)
        02:00.1 SATA controller [0106]: Advanced Micro Devices, Inc. [AMD] 400 Series Chipset SATA Controller [1022:43c8] (rev 01)
        02:00.2 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] 400 Series Chipset PCIe Bridge [1022:43c6] (rev 01)
        03:00.0 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] 400 Series Chipset PCIe Port [1022:43c7] (rev 01)
        03:04.0 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] 400 Series Chipset PCIe Port [1022:43c7] (rev 01)
        03:05.0 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] 400 Series Chipset PCIe Port [1022:43c7] (rev 01)
        03:06.0 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] 400 Series Chipset PCIe Port [1022:43c7] (rev 01)
        03:07.0 PCI bridge [0604]: Advanced Micro Devices, Inc. [AMD] 400 Series Chipset PCIe Port [1022:43c7] (rev 01)
        08:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller [10ec:8168] (rev 15

what im trying to do is to use that one GPU for both the main host machiene and the virtual machiene thingy
im not even sure if i can do that or not but decided that i have free time to play around with it
}

Last edited by darkx97 (2021-03-17 18:32:58)

Slithery · 2021-03-17 18:34:45

darkx97 wrote:

then i've done
update-grub 

Why?
That command isn't valid when using Arch, it's a Debian/Ubuntu specific thing.

darkx97 · 2021-03-17 18:39:05

well im using the update-grub thingy from the AUR
im just lazy and it basically dose the config for grub

Slithery · 2021-03-17 18:52:16

Fair enough, I didn't realise that someone had gone to the effort of making an AUR package for a one-line command (the PKGBUILD alone is 15 times bigger than the simple command it replicates).

darkx97 · 2021-03-19 23:41:36

hmm im starting to think that maybe this dosent belong in the newbie forums T_T

loqs · 2021-03-19 23:46:05

Have you seen this similar thread https://bbs.archlinux.org/viewtopic.php … 3#p1961863?
Edit:
That commit was backported to 5.11.7.

Last edited by loqs (2021-03-19 23:52:39)

darkx97 · 2021-03-20 00:31:10

yeah i did check that and it is enabled

i look around for everything i can find about vertualization in my bios options .

and didnt find much but i made sure that they are enabled , it was already enabled .

im not sure if its just a hardware issue . the problem im noticing in the other threads is all of them are laptop related problems . where they probably cant boot .

i tried changing the prameter from

 iommu=pt

to

 iommu=soft

i got this

[sufian@sufian-pc ~]$ sudo dmesg | grep -i -e DMAR -e iommu
[    0.000000] Command line: BOOT_IMAGE=/boot/vmlinuz-linux root=UUID=94fdb25c-e61f-4c8c-98d8-e75c35fcece0 rw amd_iommu=on iommu=soft amdgpu.ppfeaturemask=0xffffffff amdgpu.dpm=1 video=HDMI-A-0:e video=HDMI-A-1:e loglevel=3 splash
[    0.038778] Kernel command line: BOOT_IMAGE=/boot/vmlinuz-linux root=UUID=94fdb25c-e61f-4c8c-98d8-e75c35fcece0 rw amd_iommu=on iommu=soft amdgpu.ppfeaturemask=0xffffffff amdgpu.dpm=1 video=HDMI-A-0:e video=HDMI-A-1:e loglevel=3 splash
[    0.251566] iommu: Default domain type: Translated 
[    0.324903] AMD-Vi: AMD IOMMUv2 driver by Joerg Roedel <jroedel@suse.de>
[    0.324903] AMD-Vi: AMD IOMMUv2 functionality not available on this system

i think i cant really do a gpu passthrough in my system , im trying to make a vm to play some games that need windows stuff .
i know i can dual boot but i dont want to go with this options .

loqs · 2021-03-20 00:37:55

You have updated to 5.11.7 and the issue is still present?

darkx97 · 2021-03-20 00:49:59

yeah im not sure how to fix it yet . i've seen a lot of threads about it , so far nothing that i didnt do . and tried reading the PCI passthrough via OVMF guide .
and it probably dosent talk about it , or I just missed it .

EDIT :
im pretty sure i did try it but just in case i'll try again now and post the results

Last edited by darkx97 (2021-03-20 00:51:18)

darkx97 · 2021-03-20 01:02:51

and as i expected its the same result

[    0.000000] Command line: BOOT_IMAGE=/boot/vmlinuz-linux root=UUID=94fdb25c-e61f-4c8c-98d8-e75c35fcece0 rw amd_iommu=on iommu=pt amdgpu.ppfeaturemask=0xffffffff amdgpu.dpm=1 video=HDMI-A-0:e video=HDMI-A-1:e loglevel=3 splash
[    0.039265] Kernel command line: BOOT_IMAGE=/boot/vmlinuz-linux root=UUID=94fdb25c-e61f-4c8c-98d8-e75c35fcece0 rw amd_iommu=on iommu=pt amdgpu.ppfeaturemask=0xffffffff amdgpu.dpm=1 video=HDMI-A-0:e video=HDMI-A-1:e loglevel=3 splash
[    0.249074] iommu: Default domain type: Passthrough (set via kernel command line)
[    0.446045] pci 0000:00:00.2: AMD-Vi: Unable to read/write to IOMMU perf counter.
[    0.446149] pci 0000:00:01.0: Adding to iommu group 0
[    0.446158] pci 0000:00:01.1: Adding to iommu group 1
[    0.446169] pci 0000:00:01.2: Adding to iommu group 2
[    0.446182] pci 0000:00:08.0: Adding to iommu group 3
[    0.446188] pci 0000:00:08.1: Adding to iommu group 3
[    0.446199] pci 0000:00:14.0: Adding to iommu group 4
[    0.446205] pci 0000:00:14.3: Adding to iommu group 4
[    0.446232] pci 0000:00:18.0: Adding to iommu group 5
[    0.446238] pci 0000:00:18.1: Adding to iommu group 5
[    0.446244] pci 0000:00:18.2: Adding to iommu group 5
[    0.446250] pci 0000:00:18.3: Adding to iommu group 5
[    0.446256] pci 0000:00:18.4: Adding to iommu group 5
[    0.446262] pci 0000:00:18.5: Adding to iommu group 5
[    0.446267] pci 0000:00:18.6: Adding to iommu group 5
[    0.446273] pci 0000:00:18.7: Adding to iommu group 5
[    0.446297] pci 0000:01:00.0: Adding to iommu group 6
[    0.446305] pci 0000:01:00.1: Adding to iommu group 6
[    0.446320] pci 0000:02:00.0: Adding to iommu group 7
[    0.446328] pci 0000:02:00.1: Adding to iommu group 7
[    0.446336] pci 0000:02:00.2: Adding to iommu group 7
[    0.446339] pci 0000:03:00.0: Adding to iommu group 7
[    0.446342] pci 0000:03:04.0: Adding to iommu group 7
[    0.446345] pci 0000:03:05.0: Adding to iommu group 7
[    0.446348] pci 0000:03:06.0: Adding to iommu group 7
[    0.446351] pci 0000:03:07.0: Adding to iommu group 7
[    0.446354] pci 0000:08:00.0: Adding to iommu group 7
[    0.446357] pci 0000:09:00.0: Adding to iommu group 3
[    0.446360] pci 0000:09:00.2: Adding to iommu group 3
[    0.446362] pci 0000:09:00.3: Adding to iommu group 3
[    0.446366] pci 0000:09:00.4: Adding to iommu group 3
[    0.446369] pci 0000:09:00.6: Adding to iommu group 3
[    0.446644] pci 0000:00:00.2: AMD-Vi: Found IOMMU cap 0x40
[    0.518077] AMD-Vi: AMD IOMMUv2 driver by Joerg Roedel <jroedel@suse.de>

im thinking that maybe im messing somthing here so i'll try and keep going with the guide and see how it gose
, but i still would like to know if im missing something or is it that my device wont be able to do the passthrough thing .

loqs · 2021-03-20 01:09:59

[    0.446045] pci 0000:00:00.2: AMD-Vi: Unable to read/write to IOMMU perf counter.

https://github.com/torvalds/linux/blob/ … it.c#L1776

That message means the kernel can not use AMD-Vi and has disabled the feature.
Edit:
Change link to 5.12-rc3 which matches 5.11.7 code with the backport.

Last edited by loqs (2021-03-20 01:11:50)

darkx97 · 2021-03-20 01:19:12

so is that caused from something in my hardware , or dose it has to do with a kernel prametar that im not using .

cuz i really couldnt find anything about this except that the solution is to change " iommu=pt " to " iommu=soft "

but that means i trun the thing off - as far as i understand - meaning i still can pass the device . right ?

Last edited by darkx97 (2021-03-20 01:20:07)

loqs · 2021-03-20 01:27:15

darkx97 wrote:

so is that caused from something in my hardware , or dose it has to do with a kernel prametar that im not using .

I do not know if it is a hardware or software issue or of a parameter to fix it. I was hoping the patch would have.

darkx97 wrote:

cuz i really couldnt find anything about this except that the solution is to change " iommu=pt " to " iommu=soft "
but that means i trun the thing off - as far as i understand - meaning i still can pass the device . right ?

My expectation would be that iommu=soft disables hardware IOMMU which you need for device pass through, although you should test to confirm this.

darkx97 · 2021-03-20 01:32:38

yeah im not sure yet cuz i did test it and those where the results i got

nothing about iommu being enabled or disabled

 [sufian@sufian-pc ~]$ sudo dmesg | grep -i -e DMAR -e iommu
[    0.000000] Command line: BOOT_IMAGE=/boot/vmlinuz-linux root=UUID=94fdb25c-e61f-4c8c-98d8-e75c35fcece0 rw amd_iommu=on iommu=soft amdgpu.ppfeaturemask=0xffffffff amdgpu.dpm=1 video=HDMI-A-0:e video=HDMI-A-1:e loglevel=3 splash
[    0.038778] Kernel command line: BOOT_IMAGE=/boot/vmlinuz-linux root=UUID=94fdb25c-e61f-4c8c-98d8-e75c35fcece0 rw amd_iommu=on iommu=soft amdgpu.ppfeaturemask=0xffffffff amdgpu.dpm=1 video=HDMI-A-0:e video=HDMI-A-1:e loglevel=3 splash
[    0.251566] iommu: Default domain type: Translated 
[    0.324903] AMD-Vi: AMD IOMMUv2 driver by Joerg Roedel <jroedel@suse.de>
[    0.324903] AMD-Vi: AMD IOMMUv2 functionality not available on this system

BrooklynOC · 2021-06-26 07:39:17

try in the kernel parameters iommu=1 this helped fix my problem and i am running off a 3400g and 5600xt

darkx97 · 2021-06-26 18:21:32

i think it worked, i no longer get this msg

[    0.446045] pci 0000:00:00.2: AMD-Vi: Unable to read/write to IOMMU perf counter.

this is what i got for now , im not sure if that means its working or not , but i'll stopped playing with it, i'll leave for later time , thanx for the help though

[    0.000000] Command line: BOOT_IMAGE=/boot/vmlinuz-linux root=UUID=26f13ee2-8264-4bce-b137-b7910d00496f rw amd_iommu=on iommu=1 amdgpu.ppfeaturemask=0xffffffff amdgpu.dpm=1 video=HDMI-A-0:e video=HDMI-A-1:e loglevel=3 acpi_backlight=vendor
[    0.038988] Kernel command line: BOOT_IMAGE=/boot/vmlinuz-linux root=UUID=26f13ee2-8264-4bce-b137-b7910d00496f rw amd_iommu=on iommu=1 amdgpu.ppfeaturemask=0xffffffff amdgpu.dpm=1 video=HDMI-A-0:e video=HDMI-A-1:e loglevel=3 acpi_backlight=vendor
[    0.248748] iommu: Default domain type: Translated 
[    0.312657] pci 0000:00:00.2: AMD-Vi: IOMMU performance counters supported
[    0.312762] pci 0000:00:01.0: Adding to iommu group 0
[    0.312770] pci 0000:00:01.1: Adding to iommu group 1
[    0.312780] pci 0000:00:01.2: Adding to iommu group 2
[    0.312793] pci 0000:00:08.0: Adding to iommu group 3
[    0.312799] pci 0000:00:08.1: Adding to iommu group 3
[    0.312811] pci 0000:00:14.0: Adding to iommu group 4
[    0.312817] pci 0000:00:14.3: Adding to iommu group 4
[    0.312843] pci 0000:00:18.0: Adding to iommu group 5
[    0.312849] pci 0000:00:18.1: Adding to iommu group 5
[    0.312855] pci 0000:00:18.2: Adding to iommu group 5
[    0.312860] pci 0000:00:18.3: Adding to iommu group 5
[    0.312866] pci 0000:00:18.4: Adding to iommu group 5
[    0.312873] pci 0000:00:18.5: Adding to iommu group 5
[    0.312879] pci 0000:00:18.6: Adding to iommu group 5
[    0.312886] pci 0000:00:18.7: Adding to iommu group 5
[    0.312910] pci 0000:01:00.0: Adding to iommu group 6
[    0.312918] pci 0000:01:00.1: Adding to iommu group 6
[    0.312933] pci 0000:02:00.0: Adding to iommu group 7
[    0.312941] pci 0000:02:00.1: Adding to iommu group 7
[    0.312949] pci 0000:02:00.2: Adding to iommu group 7
[    0.312952] pci 0000:03:00.0: Adding to iommu group 7
[    0.312956] pci 0000:03:04.0: Adding to iommu group 7
[    0.312959] pci 0000:03:05.0: Adding to iommu group 7
[    0.312962] pci 0000:03:06.0: Adding to iommu group 7
[    0.312965] pci 0000:03:07.0: Adding to iommu group 7
[    0.312968] pci 0000:08:00.0: Adding to iommu group 7
[    0.312971] pci 0000:09:00.0: Adding to iommu group 3
[    0.312974] pci 0000:09:00.2: Adding to iommu group 3
[    0.312977] pci 0000:09:00.3: Adding to iommu group 3
[    0.312980] pci 0000:09:00.4: Adding to iommu group 3
[    0.312983] pci 0000:09:00.6: Adding to iommu group 3
[    0.314671] pci 0000:00:00.2: AMD-Vi: Found IOMMU cap 0x40
[    0.367607] perf/amd_iommu: Detected AMD IOMMU #0 (2 banks, 4 counters/bank).
[    0.384094] AMD-Vi: AMD IOMMUv2 driver by Joerg Roedel <jroedel@suse.de>

Arch Linux

#1 2021-03-17 18:09:45

AMD-Vi: Unable to read/write to IOMMU perf counter.

#2 2021-03-17 18:34:45

Re: AMD-Vi: Unable to read/write to IOMMU perf counter.

#3 2021-03-17 18:39:05

Re: AMD-Vi: Unable to read/write to IOMMU perf counter.

#4 2021-03-17 18:52:16

Re: AMD-Vi: Unable to read/write to IOMMU perf counter.

#5 2021-03-19 23:41:36

Re: AMD-Vi: Unable to read/write to IOMMU perf counter.

#6 2021-03-19 23:46:05

Re: AMD-Vi: Unable to read/write to IOMMU perf counter.

#7 2021-03-20 00:31:10

Re: AMD-Vi: Unable to read/write to IOMMU perf counter.

#8 2021-03-20 00:37:55

Re: AMD-Vi: Unable to read/write to IOMMU perf counter.

#9 2021-03-20 00:49:59

Re: AMD-Vi: Unable to read/write to IOMMU perf counter.

#10 2021-03-20 01:02:51

Re: AMD-Vi: Unable to read/write to IOMMU perf counter.

#11 2021-03-20 01:09:59

Re: AMD-Vi: Unable to read/write to IOMMU perf counter.

#12 2021-03-20 01:19:12

Re: AMD-Vi: Unable to read/write to IOMMU perf counter.

#13 2021-03-20 01:27:15

Re: AMD-Vi: Unable to read/write to IOMMU perf counter.

#14 2021-03-20 01:32:38

Re: AMD-Vi: Unable to read/write to IOMMU perf counter.

#15 2021-06-26 07:39:17

Re: AMD-Vi: Unable to read/write to IOMMU perf counter.

#16 2021-06-26 18:21:32

Re: AMD-Vi: Unable to read/write to IOMMU perf counter.

Board footer