linux-kernel - Re: [PATCH 13/13] iommu/vt-d: Add a command line parameter for VT-d posted-interrupts

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Date:	Mon, 10 Nov 2014 14:57:49 -0700
From:	Alex Williamson <alex.williamson@...hat.com>
To:	Feng Wu <feng.wu@...el.com>
Cc:	gleb@...nel.org, pbonzini@...hat.com, dwmw2@...radead.org,
	joro@...tes.org, tglx@...utronix.de, mingo@...hat.com,
	hpa@...or.com, x86@...nel.org, kvm@...r.kernel.org,
	iommu@...ts.linux-foundation.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 13/13] iommu/vt-d: Add a command line parameter for VT-d
 posted-interrupts

On Mon, 2014-11-10 at 14:26 +0800, Feng Wu wrote:
> Enable VT-d Posted-Interrtups and add a command line
> parameter for it.
> 
> Signed-off-by: Feng Wu <feng.wu@...el.com>
> ---
>  drivers/iommu/irq_remapping.c |    9 ++++++++-
>  1 files changed, 8 insertions(+), 1 deletions(-)
> 
> diff --git a/drivers/iommu/irq_remapping.c b/drivers/iommu/irq_remapping.c
> index 0e36860..3cb9429 100644
> --- a/drivers/iommu/irq_remapping.c
> +++ b/drivers/iommu/irq_remapping.c
> @@ -23,7 +23,7 @@ int irq_remap_broken;
>  int disable_sourceid_checking;
>  int no_x2apic_optout;
>  
> -int disable_irq_post = 1;
> +int disable_irq_post = 0;
>  int irq_post_enabled = 0;
>  EXPORT_SYMBOL_GPL(irq_post_enabled);
>  
> @@ -206,6 +206,13 @@ static __init int setup_irqremap(char *str)
>  }
>  early_param("intremap", setup_irqremap);
>  
> +static __init int setup_nointpost(char *str)
> +{
> +	disable_irq_post = 1;
> +	return 0;
> +}
> +early_param("nointpost", setup_nointpost);
> +

Documentation/kernel-parameters.txt?  Thanks,

Alex

>  void __init setup_irq_remapping_ops(void)
>  {
>  	remap_ops = &intel_irq_remap_ops;



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