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Date: Fri, 20 Jul 2012 00:18:59 +0300
From: Gleb Natapov <gleb@redhat.com>
Message-ID: <20120719211859.GA21761@redhat.com>
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Subject: Re: [Qemu-devel] [seabios PATCH 1/2] acpi: set I/O APIC ID to 0 by
	default
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To: Eduardo Habkost <ehabkost@redhat.com>
Cc: Igor Mammedov <imammedo@redhat.com>, seabios@seabios.org, qemu-devel@nongnu.org

On Thu, Jul 19, 2012 at 05:52:41PM -0300, Eduardo Habkost wrote:
> When resetting an I/O APIC, its ID is set to 0, so set it to 0 on the
> MADT table too.
> 
Actually BIOS needs to configure ioapic id to a uniqe value. This does
not really matter for KVM though.

> Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
> ---
>  src/acpi.c   |    2 +-
>  src/config.h |    2 ++
>  2 files changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/src/acpi.c b/src/acpi.c
> index 55e4607..3f55de9 100644
> --- a/src/acpi.c
> +++ b/src/acpi.c
> @@ -335,7 +335,7 @@ build_madt(void)
>      struct madt_io_apic *io_apic = (void*)apic;
>      io_apic->type = APIC_IO;
>      io_apic->length = sizeof(*io_apic);
> -    io_apic->io_apic_id = CountCPUs;
> +    io_apic->io_apic_id = BUILD_IOAPIC_ID;
>      io_apic->address = cpu_to_le32(BUILD_IOAPIC_ADDR);
>      io_apic->interrupt = cpu_to_le32(0);
>  
> diff --git a/src/config.h b/src/config.h
> index 3a70867..878c691 100644
> --- a/src/config.h
> +++ b/src/config.h
> @@ -52,9 +52,11 @@
>  #define BUILD_PCIMEM64_END        0x10000000000ULL
>  
>  #define BUILD_IOAPIC_ADDR         0xfec00000
> +#define BUILD_IOAPIC_ID           0
>  #define BUILD_HPET_ADDRESS        0xfed00000
>  #define BUILD_APIC_ADDR           0xfee00000
>  
> +
>  // Important real-mode segments
>  #define SEG_IVT      0x0000
>  #define SEG_BDA      0x0040
> -- 
> 1.7.10.4

--
			Gleb.