Commit 28d6ee41 authored Feb 04, 2008 by Andi Kleen Committed by Ingo Molnar Feb 04, 2008

x86: switch pci-gart over to using set_memory_np() instead of clear_kernel_mapping()



pci-gart needs to unmap the IOMMU aperture to prevent cache corruptions.

Switch this over to using set_memory_np() instead of clear_kernel_mapping().

Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

parent 64f351d1

arch/x86/kernel/pci-gart_64.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -731,7 +731,8 @@ void __init gart_iommu_init(void)
		* the backing memory. The GART address is only used by PCI
		* devices.
		*/
		clear_kernel_mapping((unsigned long)__va(iommu_bus_base), iommu_size);
		set_memory_np((unsigned long)__va(iommu_bus_base),
		iommu_size >> PAGE_SHIFT);

		/*
		* Try to workaround a bug (thanks to BenH)