<html><head></head><body><div>On Wed, 2024-02-21 at 09:56 +0100, Andrea Righi wrote:</div><blockquote type="cite" style="margin:0 0 0 .8ex; border-left:2px #729fcf solid;padding-left:1ex"><div>BugLink: <a href="https://bugs.launchpad.net/bugs/1951440">https://bugs.launchpad.net/bugs/1951440</a><br></div><div><br></div><div>We have tried in the past to enable CONFIG_INTEL_IOMMU_DEFAULT_ON and<br></div><div>CONFIG_INTEL_IOMMU_SCALABLE_MODE_DEFAULT_ON (starting with Jammy), but<br></div><div>there were multiple issues (especially with old hardware), so we ended<br></div><div>up disabling these options afterwards, see LP: #1971699.<br></div><div><br></div><div>Considering that IOMMU is enabled by default in upstream kernels,<br></div><div>probably most of these issues are solved now (or old hardware has been<br></div><div>decommissioned).<br></div><div><br></div><div>Moreover, having this enabled by default can prevent potential issues<br></div><div>with modern hardware and drivers (see for example LP #1958004).<br></div><div><br></div><div>Signed-off-by: Andrea Righi <<a href="mailto:andrea.righi@canonical.com">andrea.righi@canonical.com</a>><br></div><div>---<br></div><div> debian.master/config/annotations | 8 +++++---<br></div><div> 1 file changed, 5 insertions(+), 3 deletions(-)<br></div><div><br></div><div>diff --git a/debian.master/config/annotations b/debian.master/config/annotations<br></div><div>index 5c9c4f9afb11..d459e470d806 100644<br></div><div>--- a/debian.master/config/annotations<br></div><div>+++ b/debian.master/config/annotations<br></div><div>@@ -321,8 +321,11 @@ CONFIG_INTEL_ATOMISP note<'LP: #2017444'><br></div><div> CONFIG_INTEL_ATOMISP2_PM policy<{'amd64': 'm'}><br></div><div> CONFIG_INTEL_ATOMISP2_PM note<'LP: #2017444'><br></div><div> <br></div><div>-CONFIG_INTEL_IOMMU_DEFAULT_ON policy<{'amd64': 'n'}><br></div><div>-CONFIG_INTEL_IOMMU_DEFAULT_ON note<'LP: #1971699'><br></div><div>+CONFIG_INTEL_IOMMU_DEFAULT_ON policy<{'amd64': 'y'}><br></div><div>+CONFIG_INTEL_IOMMU_DEFAULT_ON note<'LP: #1951440'><br></div><div>+<br></div><div>+CONFIG_INTEL_IOMMU_SCALABLE_MODE_DEFAULT_ON policy<{'amd64': 'y'}><br></div><div>+CONFIG_INTEL_IOMMU_SCALABLE_MODE_DEFAULT_ON note<'LP: #1951440'><br></div><div> <br></div><div> CONFIG_IOMMU_DEBUGFS policy<{'amd64': 'n', 'arm64': 'n', 'armhf': 'n', 'ppc64el': 'n', 'riscv64': 'n', 's390x': 'n'}><br></div><div> CONFIG_IOMMU_DEBUGFS note<'LP: #1861057'><br></div><div>@@ -6567,7 +6570,6 @@ CONFIG_INTEL_IOATDMA policy<{'amd64': 'm'}><br></div><div> CONFIG_INTEL_IOMMU policy<{'amd64': 'y'}><br></div><div> CONFIG_INTEL_IOMMU_FLOPPY_WA policy<{'amd64': 'y'}><br></div><div> CONFIG_INTEL_IOMMU_PERF_EVENTS policy<{'amd64': 'y'}><br></div><div>-CONFIG_INTEL_IOMMU_SCALABLE_MODE_DEFAULT_ON policy<{'amd64': 'n'}><br></div><div> CONFIG_INTEL_IOMMU_SVM policy<{'amd64': 'y'}><br></div><div> CONFIG_INTEL_IPS policy<{'amd64': 'm'}><br></div><div> CONFIG_INTEL_ISHTP_ECLITE policy<{'amd64': 'm'}><br></div><div>-- <br></div><div>2.43.0<br></div><div><br></div><div><br></div></blockquote><div><br></div><div><span><pre>-- <br></pre><pre>Acked-by: Philip Cox <philip.cox@canonical.com>
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