* [pve-devel] [PATCH docs 1/2] remove 'amd_iommu=on' from the passthrough docs
@ 2021-10-27 7:27 Dominik Csapak
2021-10-27 7:27 ` [pve-devel] [PATCH docs 2/2] pci-passthrough: expand IOMMU section with notice about BIOS Dominik Csapak
2021-10-27 11:22 ` [pve-devel] applied: [PATCH docs 1/2] remove 'amd_iommu=on' from the passthrough docs Thomas Lamprecht
0 siblings, 2 replies; 4+ messages in thread
From: Dominik Csapak @ 2021-10-27 7:27 UTC (permalink / raw)
To: pve-devel
this is wrong and does nothing. see
https://www.kernel.org/doc/html/v5.11/admin-guide/kernel-parameters.html?highlight=amd_iommu
Signed-off-by: Dominik Csapak <d.csapak@proxmox.com>
---
qm-pci-passthrough.adoc | 7 +------
1 file changed, 1 insertion(+), 6 deletions(-)
diff --git a/qm-pci-passthrough.adoc b/qm-pci-passthrough.adoc
index 43b905d..dfc3d6e 100644
--- a/qm-pci-passthrough.adoc
+++ b/qm-pci-passthrough.adoc
@@ -55,12 +55,7 @@ The command line parameters are:
----
intel_iommu=on
----
-* for AMD CPUs:
-+
-----
- amd_iommu=on
-----
-
+* for AMD CPUs it should be enabled automatically.
.Kernel Modules
--
2.30.2
^ permalink raw reply [flat|nested] 4+ messages in thread
* [pve-devel] [PATCH docs 2/2] pci-passthrough: expand IOMMU section with notice about BIOS
2021-10-27 7:27 [pve-devel] [PATCH docs 1/2] remove 'amd_iommu=on' from the passthrough docs Dominik Csapak
@ 2021-10-27 7:27 ` Dominik Csapak
2021-10-27 11:22 ` [pve-devel] applied: " Thomas Lamprecht
2021-10-27 11:22 ` [pve-devel] applied: [PATCH docs 1/2] remove 'amd_iommu=on' from the passthrough docs Thomas Lamprecht
1 sibling, 1 reply; 4+ messages in thread
From: Dominik Csapak @ 2021-10-27 7:27 UTC (permalink / raw)
To: pve-devel
note that one must enable IOMMU support in the BIOS/UEFI.
Signed-off-by: Dominik Csapak <d.csapak@proxmox.com>
---
qm-pci-passthrough.adoc | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/qm-pci-passthrough.adoc b/qm-pci-passthrough.adoc
index dfc3d6e..edaa01f 100644
--- a/qm-pci-passthrough.adoc
+++ b/qm-pci-passthrough.adoc
@@ -45,7 +45,11 @@ some configuration to enable PCI(e) passthrough.
.IOMMU
-The IOMMU has to be activated on the
+First, the IOMMU support has to be enabled in your BIOS/UEFI. Most often, that
+options is named `IOMMU` or `VT-d`, but check the manual for your motherboard
+for the exact option you need to enable.
+
+Then, the IOMMU has to be activated on the
xref:sysboot_edit_kernel_cmdline[kernel commandline].
The command line parameters are:
--
2.30.2
^ permalink raw reply [flat|nested] 4+ messages in thread
* [pve-devel] applied: [PATCH docs 1/2] remove 'amd_iommu=on' from the passthrough docs
2021-10-27 7:27 [pve-devel] [PATCH docs 1/2] remove 'amd_iommu=on' from the passthrough docs Dominik Csapak
2021-10-27 7:27 ` [pve-devel] [PATCH docs 2/2] pci-passthrough: expand IOMMU section with notice about BIOS Dominik Csapak
@ 2021-10-27 11:22 ` Thomas Lamprecht
1 sibling, 0 replies; 4+ messages in thread
From: Thomas Lamprecht @ 2021-10-27 11:22 UTC (permalink / raw)
To: Proxmox VE development discussion, Dominik Csapak
On 27/10/2021 09:27, Dominik Csapak wrote:
> this is wrong and does nothing. see
> https://www.kernel.org/doc/html/v5.11/admin-guide/kernel-parameters.html?highlight=amd_iommu
>
> Signed-off-by: Dominik Csapak <d.csapak@proxmox.com>
> ---
> qm-pci-passthrough.adoc | 7 +------
> 1 file changed, 1 insertion(+), 6 deletions(-)
>
>
applied, thanks!
^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2021-10-27 11:23 UTC | newest]
Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed)
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2021-10-27 7:27 [pve-devel] [PATCH docs 1/2] remove 'amd_iommu=on' from the passthrough docs Dominik Csapak
2021-10-27 7:27 ` [pve-devel] [PATCH docs 2/2] pci-passthrough: expand IOMMU section with notice about BIOS Dominik Csapak
2021-10-27 11:22 ` [pve-devel] applied: " Thomas Lamprecht
2021-10-27 11:22 ` [pve-devel] applied: [PATCH docs 1/2] remove 'amd_iommu=on' from the passthrough docs Thomas Lamprecht
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