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Re: 4.8.2 not booting in 32-bit VM without I/O-APIC

From Thomas Gleixner <tglx@linutronix.de>
Newsgroups linux.kernel
Subject Re: 4.8.2 not booting in 32-bit VM without I/O-APIC
Date 2016-10-28 21:10 +0200
Message-ID <sxkHn-3Tx-1@gated-at.bofh.it> (permalink)
References <sxkxH-3Bi-1@gated-at.bofh.it>
Organization linux.* mail to news gateway

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On Fri, 28 Oct 2016, Michal Necasek wrote:
> 
>  Sorry if I wasn't clear. No, it doesn't work for us. The ff8560512b8d
> commit fixes the APIC poking on machines where there is no local APIC
> available (and thus fixes the committer's machine), but it doesn't work
> in our case, where there is a local APIC but no I/O APIC, no ACPI MADT,
> and no MP tables.

> In other words, for us boot_cpu_has(X86_FEATURE_APIC) is true but the
> APIC has not been set up yet because init_apic_mappings() hasn't been
> run.

Gah. Sorry, misunderstood you. Lemme stare in the code.

Thanks,

	tglx

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Thread

Re: 4.8.2 not booting in 32-bit VM without I/O-APIC Michal Necasek <michal.necasek@oracle.com> - 2016-10-28 21:00 +0200
  Re: 4.8.2 not booting in 32-bit VM without I/O-APIC Thomas Gleixner <tglx@linutronix.de> - 2016-10-28 21:10 +0200
    Re: 4.8.2 not booting in 32-bit VM without I/O-APIC Thomas Gleixner <tglx@linutronix.de> - 2016-10-28 21:40 +0200
      Re: 4.8.2 not booting in 32-bit VM without I/O-APIC Borislav Petkov <bp@alien8.de> - 2016-10-29 12:20 +0200
      [tip:x86/urgent] x86/smpboot: Init apic mapping before usage tip-bot for Thomas Gleixner <tipbot@zytor.com> - 2016-10-29 14:10 +0200
      [tip:x86/urgent] x86/smpboot: Init apic mapping before usage tip-bot for Thomas Gleixner <tipbot@zytor.com> - 2016-10-29 14:10 +0200

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