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UBUNTU: [Config] Set IOMMU_DEFAULT_DMA_STRICT=n and IOMMU_DEFAULT_DMA_LAZY=yes for s390x

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BugLink: https://bugs.launchpad.net/bugs/2071471

Align the Ubuntu kernel config options to the modified defaults from upstream
b2b97a62f0 "Revert "s390: update defconfigs""
and set IOMMU_DEFAULT_DMA_STRICT=n and IOMMU_DEFAULT_DMA_LAZY=yes for s390x.
This is required to avoid significant PCIe network throughput degradation
with the changed dma-iommu implementation in c76c067e48
"s390/pci: Use dma-iommu layer" since v6.7.

Signed-off-by: Frank Heimes <frank.heimes@canonical.com>
Acked-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>
Acked-by: Manuel Diewald <manuel.diewald@canonical.com>
Signed-off-by: Stefan Bader <stefan.bader@canonical.com>
This commit is contained in:
Frank Heimes
2024-07-03 11:19:00 +02:00
committed by Stefan Bader
parent 8ff1a0e118
commit 77ed1ee0e7
1 changed files with 6 additions and 2 deletions
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debian.master/config/annotations
+6 -2
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@@ -345,6 +345,12 @@ CONFIG_INTEL_IOMMU_SCALABLE_MODE_DEFAULT_ON note<'LP: #1951440'>
CONFIG_IOMMU_DEBUGFS policy<{'amd64': 'n', 'arm64': 'n', 'armhf': 'n', 'ppc64el': 'n', 'riscv64': 'n', 's390x': 'n'}>
CONFIG_IOMMU_DEBUGFS note<'LP: #1861057'>
CONFIG_IOMMU_DEFAULT_DMA_LAZY policy<{'amd64': 'y', 'arm64': 'n', 'armhf': 'n', 'ppc64el': 'n', 'riscv64': 'n', 's390x': 'y'}>
CONFIG_IOMMU_DEFAULT_DMA_LAZY note<'LP: #2071471'>
CONFIG_IOMMU_DEFAULT_DMA_STRICT policy<{'amd64': 'n', 'arm64': 'y', 'armhf': 'y', 'ppc64el': 'y', 'riscv64': 'y', 's390x': 'n'}>
CONFIG_IOMMU_DEFAULT_DMA_STRICT note<'LP: #2071471'>
CONFIG_IPMMU_VMSA policy<{'arm64': 'n', 'armhf': 'n', 'riscv64': '-'}>
CONFIG_IPMMU_VMSA note<'LP: #1718734'>
@@ -6735,8 +6741,6 @@ CONFIG_IOMMUFD policy<{'amd64': 'm', 'arm64': '
CONFIG_IOMMUFD_DRIVER policy<{'amd64': 'y', 'arm64': 'y', 'armhf': 'y', 'ppc64el': 'y', 'riscv64': 'y'}>
CONFIG_IOMMU_API policy<{'amd64': 'y', 'arm64': 'y', 'armhf': 'y', 'ppc64el': 'y', 'riscv64': 'y', 's390x': 'y'}>
CONFIG_IOMMU_DEBUG policy<{'amd64': 'n'}>
CONFIG_IOMMU_DEFAULT_DMA_LAZY policy<{'amd64': 'y', 'arm64': 'n', 'armhf': 'n', 'ppc64el': 'n', 'riscv64': 'n', 's390x': 'n'}>
CONFIG_IOMMU_DEFAULT_DMA_STRICT policy<{'amd64': 'n', 'arm64': 'y', 'armhf': 'y', 'ppc64el': 'y', 'riscv64': 'y', 's390x': 'y'}>
CONFIG_IOMMU_DEFAULT_PASSTHROUGH policy<{'amd64': 'n', 'arm64': 'n', 'armhf': 'n', 'ppc64el': 'n', 'riscv64': 'n', 's390x': 'n'}>
CONFIG_IOMMU_DMA policy<{'amd64': 'y', 'arm64': 'y', 's390x': 'y'}>
CONFIG_IOMMU_HELPER policy<{'amd64': 'y', 'ppc64el': 'y', 's390x': 'y'}>