From mboxrd@z Thu Jan  1 00:00:00 1970
From: Andrew Cooper <andrew.cooper3@citrix.com>
Subject: Re: [PATCH] x86/IO-APIC: fix setting of destinations
Date: Thu, 19 Nov 2015 14:39:19 +0000
Message-ID: <564DDF17.8040106@citrix.com>
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To: Jan Beulich <JBeulich@suse.com>, xen-devel <xen-devel@lists.xenproject.org>
Cc: Keir Fraser <keir@xen.org>
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On 19/11/15 09:46, Jan Beulich wrote:
> In commit a85da715cf ("x86/IO-APIC: adjust setting of destinations") I
> made a pretty blatant mistake: get_apic_id() can be used there only
> when running APICs in physical mode. For both flat and clustered modes
> the change was wrong, causing different kinds of boot problems on
> affected systems. Don't revert that change though, but use TARGET_CPUS
> (equaling cpu_online_map, and with there only being a single online CPU
> fulfilling the original commits intention).
>
> Signed-off-by: Jan Beulich <jbeulich@suse.com>

I also missed that while reviewing.

Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com>

>
> --- a/xen/arch/x86/io_apic.c
> +++ b/xen/arch/x86/io_apic.c
> @@ -1039,7 +1039,7 @@ static void __init setup_IO_APIC_irqs(vo
>                  disable_8259A_irq(irq_to_desc(irq));
>  
>              desc = irq_to_desc(irq);
> -            SET_DEST(entry, logical, get_apic_id());
> +            SET_DEST(entry, logical, cpu_mask_to_apicid(TARGET_CPUS));
>              spin_lock_irqsave(&ioapic_lock, flags);
>              __ioapic_write_entry(apic, pin, 0, entry);
>              set_native_irq_info(irq, TARGET_CPUS);
>
>
>