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| author | Christoph Hellwig <hch@lst.de> | 2020-03-16 22:32:13 +0300 |
|---|---|---|
| committer | Jason Gunthorpe <jgg@mellanox.com> | 2020-03-26 20:33:37 +0300 |
| commit | f894ddd5ff01d3bb48faf4dc533536bf5269c17a (patch) | |
| tree | 6e62359994be7d1e61aab32864b6cc399cbb09e5 /arch/powerpc/kvm/book3s_hv_uvmem.c | |
| parent | 5a0c38d307afde167175602aa52ca4e6c5c42c44 (diff) | |
| download | linux-f894ddd5ff01d3bb48faf4dc533536bf5269c17a.tar.xz | |
memremap: add an owner field to struct dev_pagemap
Add a new opaque owner field to struct dev_pagemap, which will allow the
hmm and migrate_vma code to identify who owns ZONE_DEVICE memory, and
refuse to work on mappings not owned by the calling entity.
Link: https://lore.kernel.org/r/20200316193216.920734-2-hch@lst.de
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Ralph Campbell <rcampbell@nvidia.com>
Tested-by: Bharata B Rao <bharata@linux.ibm.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Diffstat (limited to 'arch/powerpc/kvm/book3s_hv_uvmem.c')
| -rw-r--r-- | arch/powerpc/kvm/book3s_hv_uvmem.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/powerpc/kvm/book3s_hv_uvmem.c b/arch/powerpc/kvm/book3s_hv_uvmem.c index 79b1202b1c62..67fefb03b9b7 100644 --- a/arch/powerpc/kvm/book3s_hv_uvmem.c +++ b/arch/powerpc/kvm/book3s_hv_uvmem.c @@ -779,6 +779,8 @@ int kvmppc_uvmem_init(void) kvmppc_uvmem_pgmap.type = MEMORY_DEVICE_PRIVATE; kvmppc_uvmem_pgmap.res = *res; kvmppc_uvmem_pgmap.ops = &kvmppc_uvmem_ops; + /* just one global instance: */ + kvmppc_uvmem_pgmap.owner = &kvmppc_uvmem_pgmap; addr = memremap_pages(&kvmppc_uvmem_pgmap, NUMA_NO_NODE); if (IS_ERR(addr)) { ret = PTR_ERR(addr); |