linux-kernel - Re: [PATCH -next] iommu: Fix build failure without INTEL

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Date:	Thu, 04 Jun 2015 16:12:07 +0800
From:	Jiang Liu <jiang.liu@...ux.intel.com>
To:	Daniel J Blueman <daniel@...ascale.com>
CC:	Thomas Gleixner <tglx@...utronix.de>,
	Fenghua Yu <fenghua.yu@...el.com>,
	Steffen Persvold <sp@...ascale.com>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH -next] iommu: Fix build failure without INTEL_IOMMU

Hi Daniel,
	Seems there's already a patch to fix this issue posted by Joerg
http://www.spinics.net/lists/kernel/msg2004510.html
Thanks!
Gerry

On 2015/6/4 16:07, Daniel J Blueman wrote:
> Fix Intel IOMMU build failure in linux-next when CONFIG_INTEL_IOMMU is not enabled.
> 
> Signed-off-by: Daniel J Blueman <daniel@...ascale.com>
> ---
>  drivers/iommu/intel_irq_remapping.c | 8 ++++++++
>  1 file changed, 8 insertions(+)
> 
> diff --git a/drivers/iommu/intel_irq_remapping.c b/drivers/iommu/intel_irq_remapping.c
> index 24f7a35..ec337e7 100644
> --- a/drivers/iommu/intel_irq_remapping.c
> +++ b/drivers/iommu/intel_irq_remapping.c
> @@ -146,8 +146,10 @@ static int modify_irte(struct irq_2_iommu *irq_iommu,
>  	set_64bit(&irte->low, irte_modified->low);
>  	set_64bit(&irte->high, irte_modified->high);
>  
> +#ifdef CONFIG_INTEL_IOMMU
>  	if (iommu->pre_enabled_ir)
>  		__iommu_update_old_irte(iommu, index);
> +#endif
>  
>  	__iommu_flush_cache(iommu, irte, sizeof(*irte));
>  
> @@ -210,8 +212,10 @@ static int clear_entries(struct irq_2_iommu *irq_iommu)
>  	bitmap_release_region(iommu->ir_table->bitmap, index,
>  			      irq_iommu->irte_mask);
>  
> +#ifdef CONFIG_INTEL_IOMMU
>  	if (iommu->pre_enabled_ir)
>  		__iommu_update_old_irte(iommu, -1);
> +#endif
>  
>  	return qi_flush_iec(iommu, index, irq_iommu->irte_mask);
>  }
> @@ -650,6 +654,7 @@ static int __init intel_enable_irq_remapping(void)
>  	 * Setup Interrupt-remapping for all the DRHD's now.
>  	 */
>  	for_each_iommu(iommu, drhd) {
> +#ifdef CONFIG_INTEL_IOMMU
>  		if (iommu->pre_enabled_ir) {
>  			unsigned long long q;
>  
> @@ -660,6 +665,7 @@ static int __init intel_enable_irq_remapping(void)
>  				INTR_REMAP_TABLE_ENTRIES*sizeof(struct irte));
>  			__iommu_load_old_irte(iommu);
>  		} else
> +#endif
>  			iommu_set_irq_remapping(iommu, eim);
>  
>  		setup = true;
> @@ -1374,6 +1380,7 @@ static int __iommu_update_old_irte(struct intel_iommu *iommu, int index)
>  
>  static void iommu_check_pre_ir_status(struct intel_iommu *iommu)
>  {
> +#ifdef CONFIG_INTEL_IOMMU
>  	u32 sts;
>  
>  	sts = readl(iommu->reg + DMAR_GSTS_REG);
> @@ -1381,4 +1388,5 @@ static void iommu_check_pre_ir_status(struct intel_iommu *iommu)
>  		pr_info("IR is enabled prior to OS.\n");
>  		iommu->pre_enabled_ir = 1;
>  	}
> +#endif
>  }
> 
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