From: Aaron Lauterer <a.lauterer@proxmox.com>
To: Proxmox VE development discussion <pve-devel@lists.proxmox.com>,
Christoph Heiss <c.heiss@proxmox.com>
Subject: Re: [pve-devel] [PATCH docs 2/3] pci-passthrough: mention that `intel_iommu=on` is the default for 6.8+
Date: Tue, 29 Oct 2024 14:17:59 +0100 [thread overview]
Message-ID: <9ddd8807-5623-484f-aa5d-b751d732ae53@proxmox.com> (raw)
In-Reply-To: <20241022101941.329529-3-c.heiss@proxmox.com>
Looking at the surrounding context, I would rework this section even
more. Before I just apply my approach, what do you think about the
following change?
---
diff --git a/qm-pci-passthrough.adoc b/qm-pci-passthrough.adoc
index 4f19f2a..ca07692 100644
--- a/qm-pci-passthrough.adoc
+++ b/qm-pci-passthrough.adoc
@@ -63,19 +63,18 @@ some configuration to enable PCI(e) passthrough.
.IOMMU
-First, you will have to enable IOMMU support in your BIOS/UEFI. Usually the
+You will have to enable IOMMU support in your BIOS/UEFI. Usually the
corresponding setting is called `IOMMU` or `VT-d`, but you should find
the exact
option name in the manual of your motherboard.
-For Intel CPUs, you also need to enable the IOMMU on the
-xref:sysboot_edit_kernel_cmdline[kernel command line] kernels by adding:
+With recent kernels (6.8 or newer), `IOMMU` should be enabled
automatically.
+On older kernels, it was necessary to enable it on Intel CPUs via the
+xref:sysboot_edit_kernel_cmdline[kernel command line] by adding:
----
intel_iommu=on
----
-For AMD CPUs it should be enabled automatically.
-
.IOMMU Passthrough Mode
If your hardware supports IOMMU passthrough mode, enabling this mode might
On 2024-10-22 12:19, Christoph Heiss wrote:
> Signed-off-by: Christoph Heiss <c.heiss@proxmox.com>
> ---
> qm-pci-passthrough.adoc | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/qm-pci-passthrough.adoc b/qm-pci-passthrough.adoc
> index c3dd184..70e33f2 100644
> --- a/qm-pci-passthrough.adoc
> +++ b/qm-pci-passthrough.adoc
> @@ -74,7 +74,8 @@ xref:sysboot_edit_kernel_cmdline[kernel command line] kernels by adding:
> intel_iommu=on
> ----
>
> -For AMD CPUs it should be enabled automatically.
> +For AMD CPUs it should be enabled automatically. For Intel CPUs this is also
> +the default since the 6.8 kernel series.
>
> .IOMMU Passthrough Mode
>
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next prev parent reply other threads:[~2024-10-29 13:18 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-10-22 10:19 [pve-devel] [PATCH docs 0/3] pci-passthrough: update section for newer kernels, add mdev driver note Christoph Heiss
2024-10-22 10:19 ` [pve-devel] [PATCH docs 1/3] pci-passthrough: drop obsolete `vfio_virqfd` kernel module requirement Christoph Heiss
2024-10-22 10:19 ` [pve-devel] [PATCH docs 2/3] pci-passthrough: mention that `intel_iommu=on` is the default for 6.8+ Christoph Heiss
2024-10-29 13:17 ` Aaron Lauterer [this message]
2024-10-31 9:53 ` Christoph Heiss
2024-10-22 10:19 ` [pve-devel] [PATCH docs 3/3] pci-passthrough: add note about mediated devices w.r.t kernel modules Christoph Heiss
2024-10-31 10:29 ` [pve-devel] applied: [PATCH docs 0/3] pci-passthrough: update section for newer kernels, add mdev driver note Aaron Lauterer
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