x86: Gart: fix breakage due to IOMMU initialization cleanup

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This fixes the following breakage of the commit
75f1cdf1dd:

- GART systems that don't AGP with broken BIOS and more than 4GB
  memory are forced to use swiotlb. They can allocate aperture by
  hand and use GART.

- GART systems without GAP must disable GART on shutdown.

- swiotlb usage is forced by the boot option,
  gart_iommu_hole_init() is not called, so we disable GART
  early_gart_iommu_check().

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
LKML-Reference: <1260759135-6450-3-git-send-email-fujita.tomonori@lab.ntt.co.jp>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

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This commit is contained in:

Yinghai Lu 2009-12-14 11:52:15 +09:00 • committed by Ingo Molnar

parent f4780ca005

commit f3eee54276

2 changed files with 8 additions and 6 deletions

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11

arch/x86/kernel/aperture_64.c

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3

arch/x86/kernel/pci-gart_64.c

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