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[Bug 1856724] Re: SB.PCI0.SMB0 device drivers unavailable

From: John Snow
Subject: [Bug 1856724] Re: SB.PCI0.SMB0 device drivers unavailable
Date: Thu, 30 Jan 2020 19:16:11 -0000

Hi, although this isn't my area of expertise, the bug caught my eye.
Peter Maydell points out that there is a commit that addresses this

It just never made its way back here to launchpad.

** Changed in: qemu
       Status: New => Fix Committed

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  SB.PCI0.SMB0 device drivers unavailable

Status in QEMU:
  Fix Committed

Bug description:
  QEMU 4.2 introduces new device with this code:

  static void build_smb0(Aml *table, I2CBus *smbus, int devnr, int func)
      Aml *scope = aml_scope("_SB.PCI0");
      Aml *dev = aml_device("SMB0");

      aml_append(dev, aml_name_decl("_HID", aml_eisaid("APP0005")));
      aml_append(dev, aml_name_decl("_ADR", aml_int(devnr << 16 | func)));
      build_acpi_ipmi_devices(dev, BUS(smbus), "\\_SB.PCI0.SMB0");
      aml_append(scope, dev);
      aml_append(table, scope);

  It is detected by Windows 10 as 'Unknown Device' and there is no driver 
  Please provide a working Windows driver or give ability to disable this 

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