linux-kernel - Re: [PATCH 04/19] x86, io_apic: Introduce x86_io_apic_ops.print

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Date:	Sun, 26 Aug 2012 20:03:23 +0200
From:	Sebastian Andrzej Siewior <sebastian@...akpoint.cc>
To:	Joerg Roedel <joerg.roedel@....com>
Cc:	x86@...nel.org, linux-kernel@...r.kernel.org, joro@...tes.org,
	Suresh Siddha <suresh.b.siddha@...el.com>,
	Yinghai Lu <yinghai@...nel.org>
Subject: Re: [PATCH 04/19] x86, io_apic: Introduce
 x86_io_apic_ops.print_entries for debugging

On Mon, Aug 20, 2012 at 03:55:50PM +0200, Joerg Roedel wrote:
> This call-back is used to dump IO-APIC entries for debugging
> purposes into the kernel log. VT-d needs a special routine
> for this and will overwrite the default.

Okay, again: code basically does what it did, it has been shifted around and
is now called directly.

> Signed-off-by: Joerg Roedel <joerg.roedel@....com>
> diff --git a/drivers/iommu/intel_irq_remapping.c b/drivers/iommu/intel_irq_remapping.c
> index e0b18f3..321db1a 100644
> --- a/drivers/iommu/intel_irq_remapping.c
> +++ b/drivers/iommu/intel_irq_remapping.c
> @@ -617,6 +617,10 @@ static int __init intel_enable_irq_remapping(void)
>  		goto error;
>  
>  	irq_remapping_enabled = 1;
> +
> +	/* VT-d needs a special routine to print IO-APIC entries */
Seriously? That that's why you overwrite it with a different function :)

> +	x86_io_apic_ops.print_entries = intel_ir_io_apic_print_entries;
> +
>  	pr_info("Enabled IRQ remapping in %s mode\n", eim ? "x2apic" : "xapic");
>  
>  	return eim ? IRQ_REMAP_X2APIC_MODE : IRQ_REMAP_XAPIC_MODE;

Sebastian
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