nvme-pci: Re-enable NVME Host Memory Block (HMB) support #6844
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This seems reasonable to me. Any concerns, @P33M? |
Contributor
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Not really - it's a module parameter so can be defaulted in the driver itself, but doing it this way drops a downstream code patch. |
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Lightly squashed, and merged offline. Thanks! |
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Is the original HBM disable patch reverted as well ? Changing the .dtsi files only will not have any effect |
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Oh ye of little faith: https://github.com/raspberrypi/linux/commits/rpi-6.12.y/ |
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kernel: arm64: dts: bcm2712-rpi: Add uart0_dma parameter See: raspberrypi/linux#6838 kernel: configs: Enable SENSORS_POWERZ See: raspberrypi/linux#6845 kernel: wifi: brcmfmac: Include modinfo for 43456 CLM blob See: raspberrypi/linux#6843 kernel: nvme-pci: Re-enable NVME Host Memory Block (HMB) support See: raspberrypi/linux#6844 kernel: pisound-micro: Added pin_pull and pin_b_pull sysfs attributes for Pisound Micro See: raspberrypi/linux#6848 kernel: drm/rp1/rp1_dpi: Move Composite Sync generation into the kernel See: raspberrypi/linux#6826 kernel: Fix up rp1_dpi_pio for CONFIG_RP1_PIO=n builds See: raspberrypi/linux#6851
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kernel: arm64: dts: bcm2712-rpi: Add uart0_dma parameter See: raspberrypi/linux#6838 kernel: configs: Enable SENSORS_POWERZ See: raspberrypi/linux#6845 kernel: wifi: brcmfmac: Include modinfo for 43456 CLM blob See: raspberrypi/linux#6843 kernel: nvme-pci: Re-enable NVME Host Memory Block (HMB) support See: raspberrypi/linux#6844 kernel: pisound-micro: Added pin_pull and pin_b_pull sysfs attributes for Pisound Micro See: raspberrypi/linux#6848 kernel: drm/rp1/rp1_dpi: Move Composite Sync generation into the kernel See: raspberrypi/linux#6826 kernel: Fix up rp1_dpi_pio for CONFIG_RP1_PIO=n builds See: raspberrypi/linux#6851
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commit ec6ca8fd21ab010304b6a4b217f0e479f0533ed2 from https://github.com/raspberrypi/linux.git rpi-6.12.y Link: raspberrypi/linux#6504 raspberrypi/linux#6844 Signed-off-by: Xiaolei Wang <xiaolei.wang@windriver.com>
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commit ec6ca8fd21ab010304b6a4b217f0e479f0533ed2 from https://github.com/raspberrypi/linux.git rpi-6.12.y Link: raspberrypi/linux#6504 raspberrypi/linux#6844 Signed-off-by: Xiaolei Wang <xiaolei.wang@windriver.com>
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commit ec6ca8fd21ab010304b6a4b217f0e479f0533ed2 from https://github.com/raspberrypi/linux.git rpi-6.12.y Link: raspberrypi/linux#6504 raspberrypi/linux#6844 Signed-off-by: Xiaolei Wang <xiaolei.wang@windriver.com>
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This pull request restores the NVME Host Memory Block (HMB) support that was disabled in RPi kernel in December 2024.
Instead, the default kernel command line is changed for RPi 4/5 to set maximum allowed HBM size to 0.
This preserves current kernel functionality, but gives the user possibility to manually enable HMB in
cmdline.txtfile by addingnvme.max_host_mem_size_mb=<size>parameter.Optionally the user can increase the default CMA size in
config.txtby adding/changing thedtoverlay=vc4-kms-v3d,cma-<size>line