Paul Mackerras 6a7bbd57ed x86: Make 64-bit efi_ioremap use ioremap on MMIO regions ... Booting current 64-bit x86 kernels on the latest Apple MacBook (MacBook5,2) via EFI gives the following warning: [ 0.182209] ------------[ cut here ]------------ [ 0.182222] WARNING: at arch/x86/mm/pageattr.c:581 __cpa_process_fault+0x44/0xa0() [ 0.182227] Hardware name: MacBook5,2 [ 0.182231] CPA: called for zero pte. vaddr = ffff8800ffe00000 cpa->vaddr = ffff8800ffe00000 [ 0.182236] Modules linked in: [ 0.182242] Pid: 0, comm: swapper Not tainted 2.6.31-rc4 #6 [ 0.182246] Call Trace: [ 0.182254] [<ffffffff8102c754>] ? __cpa_process_fault+0x44/0xa0 [ 0.182261] [<ffffffff81048668>] warn_slowpath_common+0x78/0xd0 [ 0.182266] [<ffffffff81048744>] warn_slowpath_fmt+0x64/0x70 [ 0.182272] [<ffffffff8102c7ec>] ? update_page_count+0x3c/0x50 [ 0.182280] [<ffffffff818d25c5>] ? phys_pmd_init+0x140/0x22e [ 0.182286] [<ffffffff8102c754>] __cpa_process_fault+0x44/0xa0 [ 0.182292] [<ffffffff8102ce60>] __change_page_attr_set_clr+0x5f0/0xb40 [ 0.182301] [<ffffffff810d1035>] ? vm_unmap_aliases+0x175/0x190 [ 0.182307] [<ffffffff8102d4ae>] change_page_attr_set_clr+0xfe/0x3d0 [ 0.182314] [<ffffffff8102dcca>] _set_memory_uc+0x2a/0x30 [ 0.182319] [<ffffffff8102dd4b>] set_memory_uc+0x7b/0xb0 [ 0.182327] [<ffffffff818afe31>] efi_enter_virtual_mode+0x2ad/0x2c9 [ 0.182334] [<ffffffff818a1c66>] start_kernel+0x2db/0x3f4 [ 0.182340] [<ffffffff818a1289>] x86_64_start_reservations+0x99/0xb9 [ 0.182345] [<ffffffff818a1389>] x86_64_start_kernel+0xe0/0xf2 [ 0.182357] ---[ end trace 4eaa2a86a8e2da22 ]--- [ 0.182982] init_memory_mapping: 00000000ffffc000-0000000100000000 [ 0.182993] 00ffffc000 - 0100000000 page 4k This happens because the 64-bit version of efi_ioremap calls init_memory_mapping for all addresses, regardless of whether they are RAM or MMIO. The EFI tables on this machine ask for runtime access to some MMIO regions: [ 0.000000] EFI: mem195: type=11, attr=0x8000000000000000, range=[0x0000000093400000-0x0000000093401000) (0MB) [ 0.000000] EFI: mem196: type=11, attr=0x8000000000000000, range=[0x00000000ffc00000-0x00000000ffc40000) (0MB) [ 0.000000] EFI: mem197: type=11, attr=0x8000000000000000, range=[0x00000000ffc40000-0x00000000ffc80000) (0MB) [ 0.000000] EFI: mem198: type=11, attr=0x8000000000000000, range=[0x00000000ffc80000-0x00000000ffca4000) (0MB) [ 0.000000] EFI: mem199: type=11, attr=0x8000000000000000, range=[0x00000000ffca4000-0x00000000ffcb4000) (0MB) [ 0.000000] EFI: mem200: type=11, attr=0x8000000000000000, range=[0x00000000ffcb4000-0x00000000ffffc000) (3MB) [ 0.000000] EFI: mem201: type=11, attr=0x8000000000000000, range=[0x00000000ffffc000-0x0000000100000000) (0MB) This arranges to pass the EFI memory type through to efi_ioremap, and makes efi_ioremap use ioremap rather than init_memory_mapping if the type is EFI_MEMORY_MAPPED_IO. With this, the above warning goes away. Signed-off-by: Paul Mackerras <paulus@samba.org> LKML-Reference: <19062.55858.533494.471153@cargo.ozlabs.ibm.com> Cc: Huang Ying <ying.huang@intel.com> Signed-off-by: H. Peter Anvin <hpa@zytor.com>		2009-08-03 13:34:25 -07:00
..
alpha	mm: Pass virtual address to [__]p{te,ud,md}_free_tlb()	2009-07-27 12:10:38 -07:00
arm	mm: Pass virtual address to [__]p{te,ud,md}_free_tlb()	2009-07-27 12:10:38 -07:00
avr32	mm: Pass virtual address to [__]p{te,ud,md}_free_tlb()	2009-07-27 12:10:38 -07:00
blackfin	blackfin: fix wrong CTS inversion	2009-07-20 16:38:44 -07:00
cris	mm: Pass virtual address to [__]p{te,ud,md}_free_tlb()	2009-07-27 12:10:38 -07:00
frv	mm: Pass virtual address to [__]p{te,ud,md}_free_tlb()	2009-07-27 12:10:38 -07:00
h8300	sched: INIT_PREEMPT_COUNT	2009-07-10 14:24:05 -07:00
ia64	mm: Pass virtual address to [__]p{te,ud,md}_free_tlb()	2009-07-27 12:10:38 -07:00
m32r	mm: Pass virtual address to [__]p{te,ud,md}_free_tlb()	2009-07-27 12:10:38 -07:00
m68k	mm: Pass virtual address to [__]p{te,ud,md}_free_tlb()	2009-07-27 12:10:38 -07:00
m68knommu	Remove multiple KERN_ prefixes from printk formats	2009-07-08 10:30:03 -07:00
microblaze	Merge branch 'fixes-for-linus' of git://git.monstr.eu/linux-2.6-microblaze	2009-07-27 12:18:27 -07:00
mips	mm: Pass virtual address to [__]p{te,ud,md}_free_tlb()	2009-07-27 12:10:38 -07:00
mn10300	mm: Pass virtual address to [__]p{te,ud,md}_free_tlb()	2009-07-27 12:10:38 -07:00
parisc	mm: Pass virtual address to [__]p{te,ud,md}_free_tlb()	2009-07-27 12:10:38 -07:00
powerpc	mm: Pass virtual address to [__]p{te,ud,md}_free_tlb()	2009-07-27 12:10:38 -07:00
s390	Merge branch 'for-linus' of git://git390.marist.edu/pub/scm/linux-2.6	2009-07-27 12:16:38 -07:00
sh	mm: Pass virtual address to [__]p{te,ud,md}_free_tlb()	2009-07-27 12:10:38 -07:00
sparc	mm: Pass virtual address to [__]p{te,ud,md}_free_tlb()	2009-07-27 12:10:38 -07:00
um	mm: Pass virtual address to [__]p{te,ud,md}_free_tlb()	2009-07-27 12:10:38 -07:00
x86	x86: Make 64-bit efi_ioremap use ioremap on MMIO regions	2009-08-03 13:34:25 -07:00
xtensa	mm: Pass virtual address to [__]p{te,ud,md}_free_tlb()	2009-07-27 12:10:38 -07:00
.gitignore
Kconfig	gcov: add gcov profiling infrastructure	2009-06-18 13:03:57 -07:00