WebFrom: Sasha Levin To: "[email protected]" , "[email protected]" Cc: Mika Westerberg , Wolfram Sang , Sasha Levin Subject: [PATCH … WebNothing happens, but dmesg says this: [ 254.890450] i801_smbus 0000:00:1f.4: BIOS is accessing SMBus registers [ 254.890459] i801_smbus 0000:00:1f.4: Driver SMBus register access inhibited. Comment 86 Andy Shevchenko 2024-08-09 16:14:32 UTC (In reply to Simon Detheridge from comment #81) > OK, I shall add these. I'll also add the …
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WebJul 30, 2024 · It's true the BIOS does need to init super-essential stuff like DRAM timings, using cache-as-RAM (no-fill) mode before loading a UEFI or legacy-BIOS-MBR bootloader from disk. But a proper OS will take over all the memory, including any the BIOS was using; the BIOS just inits the HW, doesn't stay active. – Peter Cordes. http://smbus.org/specs/smbb10.pdf canned pudding
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WebSMBus does > + * have a lock bit in the status register that in theory > + * can be used to safely share the SMBus between the > + * BIOS and the kernel, but some badly behaved BIOS > + * implementations don't use it. In that case, the only It's not really fair to blame the BIOS, considering that the driver doesn't use it (yet) either. WebDec 17, 2024 · i801_smbus 0000:00:1f.4: BIOS left SMBus locked And if ACPI AML tries to use the bus concurrently with Linux, or it previously used the bus and we failed to subsequently lock it as above, the driver will give up and users will get: i801_smbus 0000:00:1f.4: BIOS uses SMBus unsafely i801_smbus 0000:00:1f.4: Driver SMBus … WebAug 11, 2011 · It seems the first step to accomplishing my task is to write to the following hardware registers: AX, BH, BL, CH, CL, and read the return values from the following: … fix plumbing under kitchen sink