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From: Thomas Gleixner <tglx@linutronix.de>
To: Michal Necasek <michal.necasek@oracle.com>
Cc: prarit@redhat.com, ville.syrjala@linux.intel.com,
	michael.thayer@oracle.com, knut.osmundsen@oracle.com,
	frank.mehnert@oracle.com, linux-kernel@vger.kernel.org
Subject: Re: 4.8.2 not booting in 32-bit VM without I/O-APIC
Date: Fri, 28 Oct 2016 21:00:05 +0200 (CEST)	[thread overview]
Message-ID: <alpine.DEB.2.20.1610282059140.5053@nanos> (raw)
In-Reply-To: <6f385a6a-1f22-4be7-8005-28b714ca271a@default>

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

  reply	other threads:[~2016-10-28 19:02 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-10-28 18:52 Michal Necasek
2016-10-28 19:00 ` Thomas Gleixner [this message]
2016-10-28 19:34   ` Thomas Gleixner
2016-10-29 10:18     ` Borislav Petkov
2016-10-29 12:04     ` [tip:x86/urgent] x86/smpboot: Init apic mapping before usage tip-bot for Thomas Gleixner
2016-10-29 12:06     ` tip-bot for Thomas Gleixner
  -- strict thread matches above, loose matches on Subject: below --
2016-11-03 20:02 4.8.2 not booting in 32-bit VM without I/O-APIC Michal Necasek
2016-11-10 14:21 ` Michael Thayer
2016-11-10 17:18   ` Thomas Gleixner
2016-10-28 18:30 Michal Necasek
2016-10-28 18:38 ` Thomas Gleixner

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