UbiquitousOS
/
OpenCloudOS-Kernel
mirror of https://gitee.com/OpenCloudOS/OpenCloudOS-Kernel.git
11
0
Fork 0
Code Issues Projects Releases Wiki Activity

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>
This commit is contained in:
Andi Kleen 2008-02-04 16:48:08 +01:00 committed by Ingo Molnar
parent 64f351d197
commit 28d6ee41a6
1 changed files with 2 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
arch/x86/kernel/pci-gart_64.c
View File

@ -731,7 +731,8 @@ void __init gart_iommu_init(void)
* the backing memory. The GART address is only used by PCI * the backing memory. The GART address is only used by PCI
* devices. * 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) * Try to workaround a bug (thanks to BenH)