On 22/01/15 21:42, Thomas Gleixner wrote:
  config X86_UP_APIC
        bool "Local APIC support on uniprocessors"
-       depends on X86_32 && !SMP && !X86_32_NON_STANDARD && !PCI_MSI
+       depends on X86_32 && !SMP && !X86_32_NON_STANDARD
        ---help---
          A local APIC (Advanced Programmable Interrupt Controller) is an
          integrated interrupt controller in the CPU. If you have a single-CPU
@@ -872,6 +872,10 @@ config X86_UP_APIC
          performance counters), and the NMI watchdog which detects hard
          lockups.

+config X86_UP_APIC_MSI
+       def_bool y
+       select X86_UP_APIC if X86_32 && !SMP && !X86_32_NON_STANDARD && PCI_MSI
+
  config X86_UP_IOAPIC
        bool "IO-APIC support on uniprocessors"
        depends on X86_UP_APIC

OK.

That works.

You can select local apic and/or io-apic on X86_32 individually with PCI_MSI swiched off.

If you switch on PCI_MSI the option for X86_UP_APIC_MSI disappears from and is silently selected by X86_UP_APIC_MSI.




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