Balbir Singh 2e5bbb5461 KVM: PPC: Book3S HV: Migrate pinned pages out of CMA ... When PCI Device pass-through is enabled via VFIO, KVM-PPC will pin pages using get_user_pages_fast(). One of the downsides of the pinning is that the page could be in CMA region. The CMA region is used for other allocations like the hash page table. Ideally we want the pinned pages to be from non CMA region. This patch (currently only for KVM PPC with VFIO) forcefully migrates the pages out (huge pages are omitted for the moment). There are more efficient ways of doing this, but that might be elaborate and might impact a larger audience beyond just the kvm ppc implementation. The magic is in new_iommu_non_cma_page() which allocates the new page from a non CMA region. I've tested the patches lightly at my end. The full solution requires migration of THP pages in the CMA region. That work will be done incrementally on top of this. Signed-off-by: Balbir Singh <bsingharora@gmail.com> Acked-by: Alexey Kardashevskiy <aik@ozlabs.ru> [mpe: Merged via powerpc tree as that's where the changes are] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>		2016-09-29 15:14:44 +10:00
..
8xx_mmu.c	powerpc/8xx: add CONFIG_PIN_TLB_IMMR	2016-07-09 02:02:48 -05:00
40x_mmu.c	powerpc/mm: Don't use pmd_val, pud_val and pgd_val as lvalue	2015-12-14 15:19:07 +11:00
44x_mmu.c	powerpc: Delete __cpuinit usage from all users	2013-07-01 11:10:36 +10:00
copro_fault.c	mm: do not pass mm_struct into handle_mm_fault	2016-07-26 16:19:19 -07:00
dma-noncoherent.c	powerpc: Simplify test in __dma_sync()	2016-03-11 17:20:12 -06:00
fault.c	powerpc: Use kprobe blacklist for exception handlers	2016-09-19 10:53:54 +10:00
fsl_booke_mmu.c	powerpc/mm: Convert pte_user() to static inline	2016-05-01 18:32:24 +10:00
hash64_4k.c	powerpc/mm: Move hash table ops to a separate structure	2016-07-21 18:59:09 +10:00
hash64_64k.c	powerpc/mm: Move hash table ops to a separate structure	2016-07-21 18:59:09 +10:00
hash_low_32.S	powerpc: Use CURRENT_THREAD_INFO instead of open coded assembly	2012-07-11 14:18:22 +10:00
hash_native_64.c	powerpc/mm: Move register_process_table() out of ppc_md	2016-08-04 20:22:34 +10:00
hash_utils_64.c	powerpc: Clean up tm_abort duplication in hash_utils_64.c	2016-09-23 07:54:23 +10:00
highmem.c	sched/preempt, mm/kmap: Explicitly disable/enable preemption in kmap_atomic_*	2015-05-19 08:39:14 +02:00
hugepage-hash64.c	powerpc/mm: Move hash table ops to a separate structure	2016-07-21 18:59:09 +10:00
hugetlbpage-book3e.c	powerpc/fsl-book3e: Avoid lbarx on e5500	2016-03-03 23:43:05 -06:00
hugetlbpage-hash64.c	powerpc/mm: Move hash table ops to a separate structure	2016-07-21 18:59:09 +10:00
hugetlbpage-radix.c	powerpc/mm/hugetlb: Add flush_hugetlb_tlb_range	2016-08-01 11:15:13 +10:00
hugetlbpage.c	powerpc: Fix usage of _PAGE_RO in hugepage	2016-09-23 07:54:22 +10:00
icswx_pid.c
icswx.c	powerpc: Fix typo "CONFIG_ICSWX_PID"	2013-04-18 13:03:54 +10:00
icswx.h
init_32.c	powerpc/32: Add missing \n and switch to pr_warn()	2016-09-13 17:37:11 +10:00
init_64.c	powerpc/mm: Convert early cpu/mmu feature check to use the new helpers	2016-08-01 11:15:01 +10:00
Makefile	powerpc/Makefile: Drop CONFIG_WORD_SIZE for BITS	2016-09-13 17:37:06 +10:00
mem.c	powerpc: Fix build with CONFIG_MEMORY_HOTPLUG on some configs	2016-07-07 16:33:27 +10:00
mmap.c	powerpc/mm/radix: Pick the address layout for radix config	2016-05-11 21:53:47 +10:00
mmu_context_book3s64.c	powerpc/mm/radix: Update PID switch sequence	2016-07-17 16:42:53 +10:00
mmu_context_hash32.c	powerpc: Remove power3 from comments	2014-07-28 14:10:26 +10:00
mmu_context_iommu.c	KVM: PPC: Book3S HV: Migrate pinned pages out of CMA	2016-09-29 15:14:44 +10:00
mmu_context_nohash.c	powerpc/mm/slice: Remove slice_mm_new_context()	2016-05-11 21:54:00 +10:00
mmu_decl.h	powerpc/8xx: Map IMMR area with 512k page at a fixed address	2016-07-09 02:02:48 -05:00
numa.c	powerpc updates for 4.8 # 1	2016-07-30 21:01:36 -07:00
pgtable_32.c	treewide: replace obsolete _refok by __ref	2016-08-02 17:31:41 -04:00
pgtable_64.c	tree wide: get rid of __GFP_REPEAT for order-0 allocations part I	2016-06-24 17:23:52 -07:00
pgtable-book3e.c	powerpc/mm: Make page table size a variable	2016-05-01 18:32:48 +10:00
pgtable-book3s64.c	powerpc/64/kexec: Fix MMU cleanup on radix	2016-09-23 07:54:17 +10:00
pgtable-hash64.c	powerpc/mm/thp: Abstraction for THP functions	2016-05-11 21:53:57 +10:00
pgtable-radix.c	powerpc/64/kexec: Fix MMU cleanup on radix	2016-09-23 07:54:17 +10:00
pgtable.c	powerpc/mm/radix: Use different pte update sequence for different POWER9 revs	2016-09-13 17:37:10 +10:00
ppc_mmu_32.c	powerpc32: refactor x_mapped_by_bats() and x_mapped_by_tlbcam() together	2016-03-11 17:18:02 -06:00
slb_low.S	powerpc/mm: Preserve CFAR value on SLB miss caused by access to bogus address	2016-09-13 17:37:03 +10:00
slb.c	powerpc/mm: Remove long disabled SLB code	2016-04-11 20:30:40 +10:00
slice.c	powerpc/mm/radix: Add checks in slice code to catch radix usage	2016-05-11 21:53:46 +10:00
subpage-prot.c	thp: rename split_huge_page_pmd() to split_huge_pmd()	2016-01-15 17:56:32 -08:00
tlb_hash32.c	powerpc/mm: remove flush_tlb_page_nohash	2016-08-01 11:15:13 +10:00
tlb_hash64.c	powerpc/mm: Hash abstraction for tlbflush routines	2016-05-01 18:33:08 +10:00
tlb_low_64e.S	powerpc: Fix misspellings in comments.	2016-03-01 19:27:20 +11:00
tlb_nohash_low.S	powerpc: Fix misspellings in comments.	2016-03-01 19:27:20 +11:00
tlb_nohash.c	powerpc/mm: Drop multiple definition of mm_is_core_local	2016-08-01 11:15:10 +10:00
tlb-radix.c	powerpc/mm: Add radix flush all with IS=3	2016-09-23 07:54:18 +10:00
vphn.c	powerpc/vphn: parsing code rewrite	2015-03-18 10:48:59 +11:00
vphn.h	powerpc/vphn: parsing code rewrite	2015-03-18 10:48:59 +11:00