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Commit e8f20414 authored by Muli Ben-Yehuda's avatar Muli Ben-Yehuda Committed by Linus Torvalds
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x86_64: only reserve the first 1MB of IO space for CalIOC2 



Signed-off-by: default avatarMuli Ben-Yehuda <muli@il.ibm.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarAndi Kleen <ak@suse.de>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 8bcf7705

arch/x86_64/kernel/pci-calgary.c

+2 −2
Original line number Diff line number Diff line
@@ -806,13 +806,13 @@ static void __init calgary_reserve_regions(struct pci_dev *dev) 
	iommu_range_reserve(tbl, bad_dma_address, EMERGENCY_PAGES);



	/* avoid the BIOS/VGA first 640KB-1MB region */

	/* for CalIOC2 - avoid the entire first 2MB */

	/* for CalIOC2 - avoid the entire first MB */

	if (is_calgary(dev->device)) {

		start = (640 * 1024);

		npages = ((1024 - 640) * 1024) >> PAGE_SHIFT;

	} else { /* calioc2 */

		start = 0;

		npages = (2 * 1024 * 1024) >> PAGE_SHIFT;

		npages = (1 * 1024 * 1024) >> PAGE_SHIFT;

	}

	iommu_range_reserve(tbl, start, npages);