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Red Hat Bugzilla – Attachment 153955 Details for
Bug 238709
GATT pages must be uncacheable
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[patch]
backport of upstream patch to RHEL-5
patch1 (text/plain), 704 bytes, created by
Chip Coldwell
on 2007-05-02 14:46:51 UTC
(
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Description:
backport of upstream patch to RHEL-5
Filename:
MIME Type:
Creator:
Chip Coldwell
Created:
2007-05-02 14:46:51 UTC
Size:
704 bytes
patch
obsolete
>--- linux-2.6.18.x86_64/arch/x86_64/kernel/pci-gart.c.orig 2006-09-19 23:42:06.000000000 -0400 >+++ linux-2.6.18.x86_64/arch/x86_64/kernel/pci-gart.c 2007-05-02 10:45:39.508421000 -0400 >@@ -522,7 +522,11 @@ static __init int init_k8_gatt(struct ag > gatt_size = (aper_size >> PAGE_SHIFT) * sizeof(u32); > gatt = (void *)__get_free_pages(GFP_KERNEL, get_order(gatt_size)); > if (!gatt) >- panic("Cannot allocate GATT table"); >+ panic("Cannot allocate GATT table"); >+ if (change_page_attr_addr((unsigned long)gatt, gatt_size >> PAGE_SHIFT, PAGE_KERNEL_NOCACHE)) >+ panic("Could not set GART PTEs to uncacheable pages"); >+ global_flush_tlb(); >+ > memset(gatt, 0, gatt_size); > agp_gatt_table = gatt; >
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