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Support emulated NUMA for BCM2711 and BCM2712 #6273

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Support emulated NUMA for BCM2711 and BCM2712 #6273

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Commits on Sep 2, 2024

  1. numa: Add simple generic NUMA emulation 

    Add some common code for splitting the memory into N emulated NUMA memory
nodes.

Individual architecture can then enable selecting this option and use the
existing numa=fake=<N> kernel argument to enable it.

Memory is always split into equally sized chunks.

Signed-off-by: Maíra Canal <mcanal@igalia.com>
Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@igalia.com>
Co-developed-by: Tvrtko Ursulin <tvrtko.ursulin@igalia.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will@kernel.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: “Rafael J. Wysocki" <rafael@kernel.org>
    @mairacanal @popcornmix
    mairacanal authored and popcornmix committed Sep 2, 2024
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  2. arm64/numa: Add NUMA emulation for ARM64 

    Allow selecting NUMA emulation on arm64.

Signed-off-by: Maíra Canal <mcanal@igalia.com>
Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@igalia.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will@kernel.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: “Rafael J. Wysocki" <rafael@kernel.org>
    @mairacanal @popcornmix
    mairacanal authored and popcornmix committed Sep 2, 2024
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  3. 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 <tvrtko.ursulin@igalia.com>
    @popcornmix
    Tvrtko Ursulin authored and popcornmix committed Sep 2, 2024
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  4. dma-buf: system_heap: Allow specifying maximum allocation order 

    system_heap.max_order=<uint>

Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@igalia.com>
    @popcornmix
    Tvrtko Ursulin authored and popcornmix committed Sep 2, 2024
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  5. config: bcm2711_defconfig/bcm2712_defconfig: Enable NUMA 

    Signed-off-by: Dom Cobley <popcornmix@gmail.com>
    @popcornmix
    popcornmix committed Sep 2, 2024
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  6. 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 <phil@raspberrypi.com>
    @pelwell @popcornmix
    pelwell authored and popcornmix committed Sep 2, 2024
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  7. dts: Set preferred numa options in bootargs 

    Signed-off-by: Dom Cobley <popcornmix@gmail.com>
    @popcornmix
    popcornmix committed Sep 2, 2024
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