Julien Grall 32e09870ee xen: Make clear that swiotlb and biomerge are dealing with DMA address ... The swiotlb is required when programming a DMA address on ARM when a device is not protected by an IOMMU. In this case, the DMA address should always be equal to the machine address. For DOM0 memory, Xen ensure it by have an identity mapping between the guest address and host address. However, when mapping a foreign grant reference, the 1:1 model doesn't work. For ARM guest, most of the callers of pfn_to_mfn expects to get a GFN (Guest Frame Number), i.e a PFN (Page Frame Number) from the Linux point of view given that all ARM guest are auto-translated. Even though the name pfn_to_mfn is misleading, we need to ensure that those caller get a GFN and not by mistake a MFN. In pratical, I haven't seen error related to this but we should fix it for the sake of correctness. In order to fix the implementation of pfn_to_mfn on ARM in a follow-up patch, we have to introduce new helpers to return the DMA from a PFN and the invert. On x86, the new helpers will be an alias of pfn_to_mfn and mfn_to_pfn. The helpers will be used in swiotlb and xen_biovec_phys_mergeable. This is necessary in the latter because we have to ensure that the biovec code will not try to merge a biovec using foreign page and another using Linux memory. Lastly, the helper mfn_to_local_pfn has been renamed to bfn_to_local_pfn given that the only usage was in swiotlb. Signed-off-by: Julien Grall <julien.grall@citrix.com> Reviewed-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Signed-off-by: David Vrabel <david.vrabel@citrix.com>		2015-09-08 17:10:52 +01:00
..
alpha	mm: clean up per architecture MM hook header files	2015-07-17 16:39:53 -07:00
arc	ARCv2: spinlock/rwlock/atomics: reduce 1 instruction in exponential backoff	2015-08-07 13:56:16 +05:30
arm	xen: Make clear that swiotlb and biomerge are dealing with DMA address	2015-09-08 17:10:52 +01:00
arm64	xen/events: Support event channel rebind on ARM	2015-08-20 12:24:15 +01:00
avr32	avr32: handle NULL as a valid clock object	2015-07-27 09:14:07 +02:00
blackfin	mm: clean up per architecture MM hook header files	2015-07-17 16:39:53 -07:00
c6x	mm: clean up per architecture MM hook header files	2015-07-17 16:39:53 -07:00
cris	mm: clean up per architecture MM hook header files	2015-07-17 16:39:53 -07:00
frv	mm: clean up per architecture MM hook header files	2015-07-17 16:39:53 -07:00
h8300	mm: clean up per architecture MM hook header files	2015-07-17 16:39:53 -07:00
hexagon	mm: clean up per architecture MM hook header files	2015-07-17 16:39:53 -07:00
ia64	mm: clean up per architecture MM hook header files	2015-07-17 16:39:53 -07:00
m32r	m32r: Add ioreadXX/iowriteXX big-endian mmio accessors	2015-07-23 18:08:28 -07:00
m68k	mm: clean up per architecture MM hook header files	2015-07-17 16:39:53 -07:00
metag	mm: clean up per architecture MM hook header files	2015-07-17 16:39:53 -07:00
microblaze	mm: clean up per architecture MM hook header files	2015-07-17 16:39:53 -07:00
mips	MIPS: Fix seccomp syscall argument for MIPS64	2015-08-16 15:00:59 +02:00
mn10300	mm: clean up per architecture MM hook header files	2015-07-17 16:39:53 -07:00
nios2	mm: clean up per architecture MM hook header files	2015-07-17 16:39:53 -07:00
openrisc	mm: clean up per architecture MM hook header files	2015-07-17 16:39:53 -07:00
parisc	parisc: mm: Fix a memory leak related to pmd not attached to the pgd	2015-07-19 08:56:14 +02:00
powerpc	signal: fix information leak in copy_siginfo_from_user32	2015-08-07 04:39:40 +03:00
s390	Just two very small & simple patches.	2015-08-05 18:50:38 +03:00
score	mm: clean up per architecture MM hook header files	2015-07-17 16:39:53 -07:00
sh	mm: clean up per architecture MM hook header files	2015-07-17 16:39:53 -07:00
sparc	sparc64: Fix userspace FPU register corruptions.	2015-08-06 19:13:25 -07:00
tile	signal: fix information leak in copy_siginfo_from_user32	2015-08-07 04:39:40 +03:00
um	mm: clean up per architecture MM hook header files	2015-07-17 16:39:53 -07:00
unicore32	mm: clean up per architecture MM hook header files	2015-07-17 16:39:53 -07:00
x86	xen: Make clear that swiotlb and biomerge are dealing with DMA address	2015-09-08 17:10:52 +01:00
xtensa	mm: clean up per architecture MM hook header files	2015-07-17 16:39:53 -07:00
.gitignore
Kconfig	x86/fpu, sched: Introduce CONFIG_ARCH_WANTS_DYNAMIC_TASK_STRUCT and use it on x86	2015-07-18 03:42:51 +02:00