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docs: Remove invalid amd_iommu=on parameter

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Per kernel-parameters.txt, there is no "on" option for amd_iommu. While
intel_iommu has it, amd_iommu is automatically on unless specified
otherwise. For more info, see these 2 links:

https://www.kernel.org/doc/Documentation/admin-guide/kernel-parameters.txt
75aa74d52f/drivers/iommu/amd/init.c (L3481)

Signed-off-by: Kent Russell <kent.russell@amd.com>
(cherry picked from commit 74333b667d)
This commit is contained in:
Kent Russell
2024-10-18 10:44:07 -04:00
committed by Peter Park
parent 508dcbc7f6
commit 1e16e8dbc9
5 changed files with 11 additions and 11 deletions
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6
docs/how-to/system-optimization/mi100.md
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@@ -342,8 +342,8 @@ If SMT is enabled by setting "CCD/Core/Thread Enablement > SMT Control" to
(logical) cores of the system: (logical) cores of the system:
* In the server BIOS, set IOMMU to "Enabled". * In the server BIOS, set IOMMU to "Enabled".
* When configuring the Grub boot loader, add the following arguments for the * When configuring the Grub boot loader, add the following argument for the
Linux kernel: `amd_iommu=on iommu=pt` Linux kernel: `iommu=pt`
* Update Grub to use the modified configuration: * Update Grub to use the modified configuration:
```shell ```shell
@@ -355,7 +355,7 @@ If SMT is enabled by setting "CCD/Core/Thread Enablement > SMT Control" to
```none ```none
[...] [...]
[ 0.000000] Kernel command line: [...] amd_iommu=on iommu=pt [ 0.000000] Kernel command line: [...] iommu=pt
[...] [...]
``` ```

6
docs/how-to/system-optimization/mi200.md
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@@ -327,8 +327,8 @@ If SMT is enabled by setting "CCD/Core/Thread Enablement > SMT Control" to
(logical) cores of the system: (logical) cores of the system:
* In the server BIOS, set IOMMU to "Enabled". * In the server BIOS, set IOMMU to "Enabled".
* When configuring the Grub boot loader, add the following arguments for the * When configuring the Grub boot loader, add the following argument for the
Linux kernel: `amd_iommu=on iommu=pt` Linux kernel: `iommu=pt`
* Update Grub to use the modified configuration: * Update Grub to use the modified configuration:
```shell ```shell
@@ -340,7 +340,7 @@ If SMT is enabled by setting "CCD/Core/Thread Enablement > SMT Control" to
```none ```none
[...] [...]
[ 0.000000] Kernel command line: [...] amd_iommu=on iommu=pt [ 0.000000] Kernel command line: [...] iommu=pt
[...] [...]
``` ```

6
docs/how-to/system-optimization/mi300x.rst
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@@ -299,7 +299,7 @@ For a system that has AMD host CPUs add this to ``GRUB_CMDLINE_LINUX``:
.. code-block:: text .. code-block:: text
amd_iommu=on iommu=pt iommu=pt
Otherwise, if the system has Intel host CPUs add this instead to Otherwise, if the system has Intel host CPUs add this instead to
``GRUB_CMDLINE_LINUX``: ``GRUB_CMDLINE_LINUX``:
@@ -500,7 +500,7 @@ If SMT is enabled by setting ``CCD/Core/Thread Enablement > SMT Control`` to
#. In the server BIOS, set IOMMU to ``Enabled``. #. In the server BIOS, set IOMMU to ``Enabled``.
#. When configuring the GRUB boot loader, add the following arguments for the Linux kernel: ``amd_iommu=on iommu=pt``. #. When configuring the GRUB boot loader, add the following argument for the Linux kernel: ``iommu=pt``.
#. Update GRUB. #. Update GRUB.
@@ -515,7 +515,7 @@ If SMT is enabled by setting ``CCD/Core/Thread Enablement > SMT Control`` to
.. code-block:: shell .. code-block:: shell
[...] [...]
[ 0.000000] Kernel command line: [...] amd_iommu=on iommu=pt [ 0.000000] Kernel command line: [...] iommu=pt
[...] [...]
Once the system is properly configured, ROCm software can be Once the system is properly configured, ROCm software can be

2
docs/how-to/system-optimization/w6000-v620.md
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@@ -111,7 +111,7 @@ sudo virsh net-start default /*to enable Virtual network by default
Enable input-output memory management unit (IOMMU) in GRUB settings by adding the following line to `/etc/default/grub`: Enable input-output memory management unit (IOMMU) in GRUB settings by adding the following line to `/etc/default/grub`:
```none ```none
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash amd_iommu=on" for AMD CPU GRUB_CMDLINE_LINUX_DEFAULT="quiet splash" for AMD CPU
``` ```
Update grub and reboot Update grub and reboot

2
tools/autotag/templates/highlights/5.3.0.md
View File

@@ -184,5 +184,5 @@ clinfo, and HelloWord.cl and cause a system crash.
* IRQ remapping does not support X2APIC mode * IRQ remapping does not support X2APIC mode
* NMI error * NMI error
Workaround: To avoid the system crash, add `amd_iommu=on iommu=pt` as the kernel bootparam, as Workaround: To avoid the system crash, add `iommu=pt` as the kernel bootparam, as
indicated in the warning message. indicated in the warning message.