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Use UC_MINUS for ioremap(), ioremap_nocache() instead of strong UC. Once all the X drivers move to ioremap_wc(), we can go back to strong UC semantics for ioremap() and ioremap_nocache(). To avoid attribute aliasing issues, pci_mmap_page_range() will also use UC_MINUS for default non write-combining mapping request. Next steps: a) change all the video drivers using ioremap() or ioremap_nocache() and adding WC MTTR using mttr_add() to ioremap_wc() b) for strict usage, we can go back to strong uc semantics for ioremap() and ioremap_nocache() after some grace period for completing step-a. c) user level X server needs to use the appropriate method for setting up WC mapping (like using resourceX_wc sysfs file instead of adding MTRR for WC and using /dev/mem or resourceX under /sys) Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com> Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> |
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.. | ||
discontig_32.c | ||
dump_pagetables.c | ||
extable.c | ||
fault.c | ||
highmem_32.c | ||
hugetlbpage.c | ||
init_32.c | ||
init_64.c | ||
ioremap.c | ||
k8topology_64.c | ||
Makefile | ||
mmap.c | ||
numa_64.c | ||
pageattr-test.c | ||
pageattr.c | ||
pat.c | ||
pgtable_32.c | ||
pgtable.c | ||
srat_64.c |