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Support emulated NUMA for BCM2711 and BCM2712 #6443

Merged
merged 6 commits into from
Oct 25, 2024
Merged

Support emulated NUMA for BCM2711 and BCM2712 #6443

merged 6 commits into from
Oct 25, 2024

Commits on Oct 25, 2024

  1. dma-buf: system_heap: Allow specifying maximum allocation order 

    system_heap.max_order=<uint>

Signed-off-by: Tvrtko Ursulin <[email protected]>
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    Tvrtko Ursulin authored and popcornmix committed Oct 25, 2024
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  2. mm/numa: Allow override of kernel's default NUMA policy 

    Add numa_policy kernel argument to allow overriding the kernel's default
NUMA policy at boot time.

Syntax identical to what tmpfs accepts as it's mpol argument is accepted.

Some examples:

 numa_policy=interleave
 numa_policy=interleave=skip-interleave
 numa_policy=bind:0-3,5,7,9-15
 numa_policy=bind=static:1-2

Signed-off-by: Tvrtko Ursulin <[email protected]>
    @popcornmix
    Tvrtko Ursulin authored and popcornmix committed Oct 25, 2024
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  3. numa/emulation: Check emulated zones around the CMA window 

    ... Make sure CMA zones do not straddle the emulated NUMA nodes ...

Signed-off-by: Tvrtko Ursulin <[email protected]>
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    Tvrtko Ursulin authored and popcornmix committed Oct 25, 2024
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  4. config: bcm2711_defconfig/bcm2712_defconfig: Enable NUMA 

    Allow NUMA and NUMA_EMULATION on 64-bit Pi kernels

Signed-off-by: Dom Cobley <[email protected]>
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    popcornmix committed Oct 25, 2024
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  5. dts: Move some common rpi settings into rpi files 

    Most 2711 devices and all 2712 device share common bootargs (command
lines). Make the common values shared defaults, overriding them were
necessary.

Signed-off-by: Phil Elwell <[email protected]>
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    pelwell authored and popcornmix committed Oct 25, 2024
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  6. dts: Set preferred numa options in bootargs 

    The default cmdline adjustment is now numa_policy=interleave for 2711 and 2712,
and additionally system_heap.max_order=0 iommu_dma_numa_policy=interleave for
just 2712 (due to its better iommu support).

The key setting numa=fake=<n> is not set here, so we will boot with a single
numa region and behaviour should be pretty much unchanged from before this PR.

Signed-off-by: Dom Cobley <[email protected]>
    @popcornmix
    popcornmix committed Oct 25, 2024
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