sonic-buildimage/device/dell/x86_64-dellemc_s5248f_c3538-r0/installer.conf

CONSOLE_PORT=0x3f8
CONSOLE_DEV=0
CONSOLE_SPEED=115200
ONIE_PLATFORM_EXTRA_CMDLINE_LINUX="intel_iommu=off"
[device]: Add a new supported device DellEMC s5248f (#3547) * Switch Vendor: DellEMC * Switch SKU: s5248F * ASIC Vendor: Broadcom * Swich ASIC: Trident3 * Port Configuration: 48x25G,4x100G,2x200G * SONiC Image: sonic-broadcom.bin * Changes Include ipmitool implementation for platform_sensors script is inclued in pmon startup * Added 25G,10G configruation(25G is default) 1-48FP. 4x100G,2x200G (49-54 FP) * LED support for s5248f 2019-10-17 20:43:59 -05:00			`CONSOLE_PORT=0x3f8`
			`CONSOLE_DEV=0`
			`CONSOLE_SPEED=115200`
[DellEMC] DMA errors are seen when loading bullseye kernel (#9641) Following errors are seen continuously on SMBus controller when loading bullseye kernel. [ 273.643046] DMAR: [DMA Write] Request device [00:12.0] PASID ffffffff fault addr 0 [fault reason 05] PTE Write access is not set [ 273.785784] DMAR: DRHD: handling fault status reg 2 [ 273.844072] DMAR: [DMA Write] Request device [00:12.0] PASID ffffffff fault addr 0 [fault reason 05] PTE Write access is not set [ 273.986804] DMAR: DRHD: handling fault status reg 2 [ 274.045101] DMAR: [DMA Write] Request device [00:12.0] PASID ffffffff fault addr 0 [fault reason 05] PTE Write access is not set [ 274.187789] DMAR: DRHD: handling fault status reg 2 root@sonic:~# lspci -s 00:12.0 -vv 00:12.0 System peripheral: Intel Corporation Atom Processor C3000 Series SMBus Contoller - Host (rev 11) Issue was not seen in buster. Modified platform specific installer.conf to turn off io_mmu 2022-01-03 10:47:13 -06:00			`ONIE_PLATFORM_EXTRA_CMDLINE_LINUX="intel_iommu=off"`