iommu/amd: Check for irq-remap support amd_iommu_prepare()
This allows to get rid of the irq_remapping_supported() function and all its call-backs into the Intel and AMD IOMMU drivers. Signed-off-by: Joerg Roedel <jroedel@suse.de> Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com> Tested-by: Joerg Roedel <joro@8bytes.org> Cc: Tony Luck <tony.luck@intel.com> Cc: iommu@lists.linux-foundation.org Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Yinghai Lu <yinghai@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Link: http://lkml.kernel.org/r/1420615903-28253-13-git-send-email-jiang.liu@linux.intel.com Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
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@ -2123,6 +2123,9 @@ static int __init iommu_go_to_state(enum iommu_init_state state)
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#ifdef CONFIG_IRQ_REMAP
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int __init amd_iommu_prepare(void)
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{
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if (!amd_iommu_irq_remap)
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return -1;
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return iommu_go_to_state(IOMMU_ACPI_FINISHED);
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}
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