kernel/linux.git/lib/test_hmm_uapi.h, branch v6.6.131

hmm-tests: add test for migrate_device_range()

2022-10-13T01:51:50+00:00

Link: https://lkml.kernel.org/r/a73cf109de0224cfd118d22be58ddebac3ae2897.1664366292.git-series.apopple@nvidia.com Signed-off-by: Alistair Popple Cc: Jason Gunthorpe Cc: Ralph Campbell Cc: John Hubbard Cc: Alex Sierra Cc: Felix Kuehling Cc: Alex Deucher Cc: Ben Skeggs Cc: Christian König Cc: Dan Williams Cc: David Hildenbrand Cc: "Huang, Ying" Cc: Lyude Paul Cc: Matthew Wilcox Cc: Michael Ellerman Cc: Yang Shi Cc: Zi Yan Signed-off-by: Andrew Morton

lib: add support for device coherent type in test_hmm

2022-07-18T00:14:29+00:00

Device Coherent type uses device memory that is coherently accesible by the CPU. This could be shown as SP (special purpose) memory range at the BIOS-e820 memory enumeration. If no SP memory is supported in system, this could be faked by setting CONFIG_EFI_FAKE_MEMMAP. Currently, test_hmm only supports two different SP ranges of at least 256MB size. This could be specified in the kernel parameter variable efi_fake_mem. Ex. Two SP ranges of 1GB starting at 0x100000000 & 0x140000000 physical address. Ex. efi_fake_mem=1G@0x100000000:0x40000,1G@0x140000000:0x40000 Private and coherent device mirror instances can be created in the same probed. This is done by passing the module parameters spm_addr_dev0 & spm_addr_dev1. In this case, it will create four instances of device_mirror. The first two correspond to private device type, the last two to coherent type. Then, they can be easily accessed from user space through /dev/hmm_mirror. Usually num_device 0 and 1 are for private, and 2 and 3 for coherent types. If no module parameters are passed, two instances of private type device_mirror will be created only. Link: https://lkml.kernel.org/r/20220715150521.18165-11-alex.sierra@amd.com Signed-off-by: Alex Sierra Acked-by: Felix Kuehling Reviewed-by: Alistair Poppple Cc: Christoph Hellwig Cc: David Hildenbrand Cc: Jason Gunthorpe Cc: Jerome Glisse Cc: Matthew Wilcox Cc: Ralph Campbell Signed-off-by: Andrew Morton

lib: test_hmm add module param for zone device type

2022-07-18T00:14:28+00:00

In order to configure device coherent in test_hmm, two module parameters should be passed, which correspond to the SP start address of each device (2) spm_addr_dev0 & spm_addr_dev1. If no parameters are passed, private device type is configured. Link: https://lkml.kernel.org/r/20220715150521.18165-10-alex.sierra@amd.com Signed-off-by: Alex Sierra Signed-off-by: Christoph Hellwig Acked-by: Felix Kuehling Reviewed-by: Alistair Poppple Cc: David Hildenbrand Cc: Jason Gunthorpe Cc: Jerome Glisse Cc: Matthew Wilcox Cc: Ralph Campbell Signed-off-by: Andrew Morton

lib: test_hmm add ioctl to get zone device type

2022-07-18T00:14:28+00:00

Add new ioctl cmd to query zone device type. This will be used once the test_hmm adds zone device coherent type. Link: https://lkml.kernel.org/r/20220715150521.18165-9-alex.sierra@amd.com Signed-off-by: Alex Sierra Signed-off-by: Christoph Hellwig Acked-by: Felix Kuehling Reviewed-by: Alistair Poppple Cc: David Hildenbrand Cc: Jason Gunthorpe Cc: Jerome Glisse Cc: Matthew Wilcox Cc: Ralph Campbell Signed-off-by: Andrew Morton

mm: selftests for exclusive device memory

2021-07-01T18:06:03+00:00

Adds some selftests for exclusive device memory. Link: https://lkml.kernel.org/r/20210616105937.23201-9-apopple@nvidia.com Signed-off-by: Alistair Popple Acked-by: Jason Gunthorpe Tested-by: Ralph Campbell Reviewed-by: Ralph Campbell Cc: Ben Skeggs Cc: Christoph Hellwig Cc: Hugh Dickins Cc: John Hubbard Cc: "Matthew Wilcox (Oracle)" Cc: Peter Xu Cc: Shakeel Butt Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

mm/hmm: add tests for hmm_pfn_to_map_order()

2020-07-10T19:24:28+00:00

Add a sanity test for hmm_range_fault() returning the page mapping size order. Link: https://lore.kernel.org/r/20200701225352.9649-6-rcampbell@nvidia.com Signed-off-by: Ralph Campbell Signed-off-by: Jason Gunthorpe

mm/hmm/test: add selftest driver for HMM

2020-05-19T19:48:30+00:00

This driver is for testing device private memory migration and devices which use hmm_range_fault() to access system memory via device page tables. Link: https://lore.kernel.org/r/20200422195028.3684-2-rcampbell@nvidia.com Link: https://lore.kernel.org/r/20200516010424.2013-1-rcampbell@nvidia.com Signed-off-by: Ralph Campbell Signed-off-by: Jérôme Glisse Link: https://lore.kernel.org/r/20200509030225.14592-1-weiyongjun1@huawei.com Link: https://lore.kernel.org/r/20200509030234.14747-1-weiyongjun1@huawei.com Signed-off-by: Wei Yongjun Link: https://lore.kernel.org/r/20200511183704.GA225608@mwanda Signed-off-by: Dan Carpenter Signed-off-by: Jason Gunthorpe