[pve-devel] [PATCH docs 1/2] remove 'amd_iommu=on' from the passthrough docs

[pve-devel] [PATCH docs 1/2] remove 'amd_iommu=on' from the passthrough docs

[Dominik Csapak]

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

[pve-devel] [PATCH docs 2/2] pci-passthrough: expand IOMMU section with notice about BIOS

[Dominik Csapak]

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

[pve-devel] applied: [PATCH docs 1/2] remove 'amd_iommu=on' from the passthrough docs

[Thomas Lamprecht]

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!

[pve-devel] applied: [PATCH docs 2/2] pci-passthrough: expand IOMMU section with notice about BIOS

[Thomas Lamprecht]

On 27/10/2021 09:27, Dominik Csapak wrote:
> 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(-)
> 
>

applied, thanks!