[PATCH v9 13/14] tools: add hmm gup tests for device coherent type

The intention is to test hmm device coherent type under different get user pages paths. Also, test gup with FOLL_LONGTERM flag set in device coherent pages. These pages should get migrated back to system memory. Signed-off-by: Alex Sierra Reviewed-by: Alistair Popple --- tools/testing

[PATCH v9 04/14] mm: handling Non-LRU pages returned by vm_normal_pages

ently don't expect ZONE_DEVICE pages, however, with DEVICE_COHERENT we might now return ZONE_DEVICE. Check for ZONE_DEVICE pages in applicable users of follow_page() as well. Signed-off-by: Alex Sierra Acked-by: Felix Kuehling (v2) Reviewed-by: Alistair Popple (v6) --- fs/proc/task_mmu.c |

[PATCH v9 11/14] tools: update hmm-test to support device coherent type

migrate_ping_pong test case added to test explicit migration from device to sys memory for both private and coherent zone types. Helpers to migrate from device to sys memory and vicerversa were also added. Signed-off-by: Alex Sierra Acked-by: Felix Kuehling Reviewed-by: Alistair Popple Signed-off-by

[PATCH v9 09/14] lib: test_hmm add module param for zone device type

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. Signed-off-by: Alex Sierra Acked-by: F

[PATCH v9 07/14] drm/amdkfd: add SPM support for SVM

. Also, MIGRATE_VMA_SELECT_DEVICE_COHERENT flag is selected for coherent type case during migration to device. Signed-off-by: Alex Sierra Reviewed-by: Felix Kuehling Signed-off-by: Christoph Hellwig --- drivers/gpu/drm/amd/amdkfd/kfd_migrate.c | 34 +++- 1 file changed, 21

[PATCH v9 02/14] mm: move page zone helpers from mm.h to mmzone.h

[WHY] It makes more sense to have these helpers in zone specific header file, rather than the generic mm.h Signed-off-by: Alex Sierra --- include/linux/memremap.h | 2 +- include/linux/mm.h | 78 --- include/linux/mmzone.h | 80

[PATCH v9 06/14] mm/gup: migrate device coherent pages when pinning instead of failing

From: Alistair Popple Currently any attempts to pin a device coherent page will fail. This is because device coherent pages need to be managed by a device driver, and pinning them would prevent a driver from migrating them off the device. However this is no reason to fail pinning of these pages.

[PATCH v9 08/14] lib: test_hmm add ioctl to get zone device type

new ioctl cmd added to query zone device type. This will be used once the test_hmm adds zone device coherent type. Signed-off-by: Alex Sierra Acked-by: Felix Kuehling Reviewed-by: Alistair Poppple Signed-off-by: Christoph Hellwig --- lib/test_hmm.c | 11 +-- lib/test_hmm_uapi.h

[PATCH v9 03/14] mm: add zone device coherent type memory support

. Signed-off-by: Alex Sierra Acked-by: Felix Kuehling Reviewed-by: Alistair Popple [hch: rebased ontop of the refcount changes, removed is_dev_private_or_coherent_page] Signed-off-by: Christoph Hellwig Acked-by: David Hildenbrand --- include/linux/memremap.h | 19 +++ include

[PATCH v9 10/14] lib: add support for device coherent type in test_hmm

e 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. Signed-off-by: Alex Sierra Acked-by: Felix Kuehling Reviewed-by:

[PATCH v9 00/14] Add MEMORY_DEVICE_COHERENT for coherent device memory mapping

uot;mm/gup: migrate device coherent pages when pinning instead of failing" with changes based on David Hildenbrand comments. - Replace moving page zone helpers into new header-specific file. Instead, those were moved to mmzone.h. Patch "mm: move page zone helpers from mm.h to mmzone.h"

[PATCH v9 12/14] tools: update test_hmm script to support SP config

Add two more parameters to set spm_addr_dev0 & spm_addr_dev1 addresses. These two parameters configure the start SP addresses for each device in test_hmm driver. Consequently, this configures zone device type as coherent. Signed-off-by: Alex Sierra Acked-by: Felix Kuehling Reviewed-by: Alis

[PATCH v9 01/14] mm: rename is_pinnable_pages to is_longterm_pinnable_pages

is_pinnable_page() and folio_is_pinnable() were renamed to is_longterm_pinnable_page() and folio_is_longterm_pinnable() respectively. These functions are used in the FOLL_LONGTERM flag context. Signed-off-by: Alex Sierra Reviewed-by: David Hildenbrand --- include/linux/mm.h | 8 mm

[PATCH v9 14/14] tools: add selftests to hmm for COW in device memory

are duplicated directly from device memory. Signed-off-by: Alex Sierra Acked-by: Felix Kuehling --- tools/testing/selftests/vm/hmm-tests.c | 80 ++ 1 file changed, 80 insertions(+) diff --git a/tools/testing/selftests/vm/hmm-tests.c b/tools/testing/selftests/vm/hmm

[PATCH v9 05/14] mm: add device coherent vma selection for memory migration

This case is used to migrate pages from device memory, back to system memory. Device coherent type memory is cache coherent from device and CPU point of view. Signed-off-by: Alex Sierra Acked-by: Felix Kuehling Reviewed-by: Alistair Poppple Signed-off-by: Christoph Hellwig Reviewed-by: David

[PATCH] mm: move page zone helpers from mm.h to mmzone.h

[WHY] It makes more sense to have these helpers in zone specific header file, rather than the generic mm.h Signed-off-by: Alex Sierra --- include/linux/memremap.h | 2 +- include/linux/mm.h | 78 --- include/linux/mmzone.h | 80

[PATCH v8 14/15] tools: add hmm gup tests for device coherent type

The intention is to test hmm device coherent type under different get user pages paths. Also, test gup with FOLL_LONGTERM flag set in device coherent pages. These pages should get migrated back to system memory. Signed-off-by: Alex Sierra Reviewed-by: Alistair Popple --- tools/testing

[PATCH v8 13/15] tools: update test_hmm script to support SP config

Add two more parameters to set spm_addr_dev0 & spm_addr_dev1 addresses. These two parameters configure the start SP addresses for each device in test_hmm driver. Consequently, this configures zone device type as coherent. Signed-off-by: Alex Sierra Acked-by: Felix Kuehling Reviewed-by: Alis

[PATCH v8 15/15] tools: add selftests to hmm for COW in device memory

are duplicated directly from device memory. Signed-off-by: Alex Sierra Acked-by: Felix Kuehling --- tools/testing/selftests/vm/hmm-tests.c | 80 ++ 1 file changed, 80 insertions(+) diff --git a/tools/testing/selftests/vm/hmm-tests.c b/tools/testing/selftests/vm/hmm

[PATCH v8 09/15] lib: test_hmm add ioctl to get zone device type

new ioctl cmd added to query zone device type. This will be used once the test_hmm adds zone device coherent type. Signed-off-by: Alex Sierra Acked-by: Felix Kuehling Reviewed-by: Alistair Poppple Signed-off-by: Christoph Hellwig --- lib/test_hmm.c | 11 +-- lib/test_hmm_uapi.h

[PATCH v8 12/15] tools: update hmm-test to support device coherent type

migrate_ping_pong test case added to test explicit migration from device to sys memory for both private and coherent zone types. Helpers to migrate from device to sys memory and vicerversa were also added. Signed-off-by: Alex Sierra Acked-by: Felix Kuehling Reviewed-by: Alistair Popple Signed-off-by

[PATCH v8 11/15] lib: add support for device coherent type in test_hmm

e 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. Signed-off-by: Alex Sierra Acked-by: Felix Kuehling Reviewed-by:

[PATCH v8 08/15] drm/amdkfd: add SPM support for SVM

. Also, MIGRATE_VMA_SELECT_DEVICE_COHERENT flag is selected for coherent type case during migration to device. Signed-off-by: Alex Sierra Reviewed-by: Felix Kuehling Signed-off-by: Christoph Hellwig --- drivers/gpu/drm/amd/amdkfd/kfd_migrate.c | 34 +++- 1 file changed, 21

[PATCH v8 10/15] lib: test_hmm add module param for zone device type

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. Signed-off-by: Alex Sierra Acked-by: F

[PATCH v8 01/15] mm: rename is_pinnable_pages to is_longterm_pinnable_pages

is_pinnable_page() and folio_is_pinnable() were renamed to is_longterm_pinnable_page() and folio_is_longterm_pinnable() respectively. These functions are used in the FOLL_LONGTERM flag context. Signed-off-by: Alex Sierra --- include/linux/mm.h | 8 mm/gup.c | 4 ++-- mm

[PATCH v8 04/15] mm: handling Non-LRU pages returned by vm_normal_pages

ently don't expect ZONE_DEVICE pages, however, with DEVICE_COHERENT we might now return ZONE_DEVICE. Check for ZONE_DEVICE pages in applicable users of follow_page() as well. Signed-off-by: Alex Sierra Acked-by: Felix Kuehling (v2) Reviewed-by: Alistair Popple (v6) --- fs/proc/task_mmu.c |

[PATCH v8 07/15] mm/gup: migrate device coherent pages when pinning instead of failing

From: Alistair Popple Currently any attempts to pin a device coherent page will fail. This is because device coherent pages need to be managed by a device driver, and pinning them would prevent a driver from migrating them off the device. However this is no reason to fail pinning of these pages.

[PATCH v8 06/15] mm: remove the vma check in migrate_vma_setup()

From: Alistair Popple migrate_vma_setup() checks that a valid vma is passed so that the page tables can be walked to find the pfns associated with a given address range. However in some cases the pfns are already known, such as when migrating device coherent pages during pin_user_pages() meaning

[PATCH v8 02/15] mm: move page zone helpers into new header-specific file

[WHY] Have a cleaner way to expose all page zone helpers in one header file, rather than split them between mm.h and memremap.h files. Signed-off-by: Alex Sierra --- drivers/infiniband/core/rw.c | 1 - drivers/nvme/target/io-cmd-bdev.c | 1 - include/linux/memremap.h | 113

[PATCH v8 05/15] mm: add device coherent vma selection for memory migration

This case is used to migrate pages from device memory, back to system memory. Device coherent type memory is cache coherent from device and CPU point of view. Signed-off-by: Alex Sierra Acked-by: Felix Kuehling Reviewed-by: Alistair Poppple Signed-off-by: Christoph Hellwig Reviewed-by: David

[PATCH v8 00/15] Add MEMORY_DEVICE_COHERENT for coherent device memory mapping

er for LRU pages handling instead. v8: - Add "mm: move page zone helpers into new header-specific file" patch. The intention is to centralize all page zone helpers and keep them independent from mm.h and memremap.h. Alex Sierra (13): mm: rename is_pinnable_pages to is_longterm_pinn

[PATCH v8 03/15] mm: add zone device coherent type memory support

. Signed-off-by: Alex Sierra Acked-by: Felix Kuehling Reviewed-by: Alistair Popple [hch: rebased ontop of the refcount changes, removed is_dev_private_or_coherent_page] Signed-off-by: Christoph Hellwig Acked-by: David Hildenbrand --- include/linux/mm.h| 4 +++- include/linux

[PATCH v7 14/14] tools: add selftests to hmm for COW in device memory

are duplicated directly from device memory. Signed-off-by: Alex Sierra Acked-by: Felix Kuehling --- tools/testing/selftests/vm/hmm-tests.c | 80 ++ 1 file changed, 80 insertions(+) diff --git a/tools/testing/selftests/vm/hmm-tests.c b/tools/testing/selftests/vm/hmm

[PATCH v7 09/14] lib: test_hmm add module param for zone device type

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. Signed-off-by: Alex Sierra Acked-by: F

[PATCH v7 08/14] lib: test_hmm add ioctl to get zone device type

new ioctl cmd added to query zone device type. This will be used once the test_hmm adds zone device coherent type. Signed-off-by: Alex Sierra Acked-by: Felix Kuehling Reviewed-by: Alistair Poppple Signed-off-by: Christoph Hellwig --- lib/test_hmm.c | 11 +-- lib/test_hmm_uapi.h

[PATCH v7 10/14] lib: add support for device coherent type in test_hmm

e 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. Signed-off-by: Alex Sierra Acked-by: Felix Kuehling Reviewed-by:

[PATCH v7 13/14] tools: add hmm gup tests for device coherent type

The intention is to test hmm device coherent type under different get user pages paths. Also, test gup with FOLL_LONGTERM flag set in device coherent pages. These pages should get migrated back to system memory. Signed-off-by: Alex Sierra Reviewed-by: Alistair Popple --- tools/testing

[PATCH v7 06/14] mm/gup: migrate device coherent pages when pinning instead of failing

From: Alistair Popple Currently any attempts to pin a device coherent page will fail. This is because device coherent pages need to be managed by a device driver, and pinning them would prevent a driver from migrating them off the device. However this is no reason to fail pinning of these pages.

[PATCH v7 11/14] tools: update hmm-test to support device coherent type

migrate_ping_pong test case added to test explicit migration from device to sys memory for both private and coherent zone types. Helpers to migrate from device to sys memory and vicerversa were also added. Signed-off-by: Alex Sierra Acked-by: Felix Kuehling Reviewed-by: Alistair Popple Signed-off-by

[PATCH v7 12/14] tools: update test_hmm script to support SP config

Add two more parameters to set spm_addr_dev0 & spm_addr_dev1 addresses. These two parameters configure the start SP addresses for each device in test_hmm driver. Consequently, this configures zone device type as coherent. Signed-off-by: Alex Sierra Acked-by: Felix Kuehling Reviewed-by: Alis

[PATCH v7 05/14] mm: remove the vma check in migrate_vma_setup()

From: Alistair Popple migrate_vma_setup() checks that a valid vma is passed so that the page tables can be walked to find the pfns associated with a given address range. However in some cases the pfns are already known, such as when migrating device coherent pages during pin_user_pages() meaning

[PATCH v7 03/14] mm: handling Non-LRU pages returned by vm_normal_pages

xpect LRU pages, are also checked for device zone pages due to DEVICE_COHERENT type. Signed-off-by: Alex Sierra Acked-by: Felix Kuehling (v2) Reviewed-by: Alistair Popple (v6) --- fs/proc/task_mmu.c | 2 +- mm/huge_memory.c | 2 +- mm/khugepaged.c| 9 ++--- mm/ksm.c | 6 +++--

[PATCH v7 04/14] mm: add device coherent vma selection for memory migration

This case is used to migrate pages from device memory, back to system memory. Device coherent type memory is cache coherent from device and CPU point of view. Signed-off-by: Alex Sierra Acked-by: Felix Kuehling Reviewed-by: Alistair Poppple Signed-off-by: Christoph Hellwig --- include/linux

[PATCH v7 07/14] drm/amdkfd: add SPM support for SVM

. Also, MIGRATE_VMA_SELECT_DEVICE_COHERENT flag is selected for coherent type case during migration to device. Signed-off-by: Alex Sierra Reviewed-by: Felix Kuehling Signed-off-by: Christoph Hellwig --- drivers/gpu/drm/amd/amdkfd/kfd_migrate.c | 34 +++- 1 file changed, 21

[PATCH v7 02/14] mm: add zone device coherent type memory support

. Signed-off-by: Alex Sierra Acked-by: Felix Kuehling Reviewed-by: Alistair Popple [hch: rebased ontop of the refcount changes, removed is_dev_private_or_coherent_page] Signed-off-by: Christoph Hellwig --- include/linux/memremap.h | 22 +- mm/memcontrol.c | 7

[PATCH v7 01/14] mm: rename is_pinnable_pages to is_pinnable_longterm_pages

is_pinnable_page() and folio_is_pinnable() were renamed to is_longterm_pinnable_page() and folio_is_longterm_pinnable() respectively. These functions are used in the FOLL_LONGTERM flag context. Signed-off-by: Alex Sierra --- include/linux/memremap.h | 24 include/linux

[PATCH v7 00/14] Add MEMORY_DEVICE_COHERENT for coherent device memory mapping

hmm and selftest/vm/hmm-test.c. v6: - Rebase to 5.19.0-rc4 - Rename is_pinnable_page to is_longterm_pinnable_page and add a coherent device checker. - Add a new gup test to hmm-test to cover fast pinnable case with FOLL_LONGTERM. v7: - Reorder patch series. - Remove FOLL_LRU and check on each

[PATCH v6 13/14] tools: add hmm gup tests for device coherent type

The intention is to test hmm device coherent type under different get user pages paths. Also, test gup with FOLL_LONGTERM flag set in device coherent pages. These pages should get migrated back to system memory. Signed-off-by: Alex Sierra Reviewed-by: Alistair Popple --- tools/testing

[PATCH v6 11/14] tools: update hmm-test to support device coherent type

migrate_ping_pong test case added to test explicit migration from device to sys memory for both private and coherent zone types. Helpers to migrate from device to sys memory and vicerversa were also added. Signed-off-by: Alex Sierra Acked-by: Felix Kuehling Reviewed-by: Alistair Popple Signed-off-by

[PATCH v6 09/14] lib: test_hmm add module param for zone device type

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. Signed-off-by: Alex Sierra Acked-by: F

[PATCH v6 14/14] tools: add selftests to hmm for COW in device memory

are duplicated directly from device memory. Signed-off-by: Alex Sierra Acked-by: Felix Kuehling --- tools/testing/selftests/vm/hmm-tests.c | 80 ++ 1 file changed, 80 insertions(+) diff --git a/tools/testing/selftests/vm/hmm-tests.c b/tools/testing/selftests/vm/hmm

[PATCH v6 10/14] lib: add support for device coherent type in test_hmm

e 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. Signed-off-by: Alex Sierra Acked-by: Felix Kuehling Reviewed-by:

[PATCH v6 07/14] drm/amdkfd: add SPM support for SVM

. Also, MIGRATE_VMA_SELECT_DEVICE_COHERENT flag is selected for coherent type case during migration to device. Signed-off-by: Alex Sierra Reviewed-by: Felix Kuehling Signed-off-by: Christoph Hellwig --- drivers/gpu/drm/amd/amdkfd/kfd_migrate.c | 34 +++- 1 file changed, 21

[PATCH v6 06/14] mm: add device coherent checker to is_pinnable_page

is_device_coherent checker was added to is_pinnable_page and renamed to is_longterm_pinnable_page. The reason is that device coherent pages are not supported for longterm pinning. Signed-off-by: Alex Sierra --- include/linux/memremap.h | 25 + include/linux/mm.h

[PATCH v6 12/14] tools: update test_hmm script to support SP config

Add two more parameters to set spm_addr_dev0 & spm_addr_dev1 addresses. These two parameters configure the start SP addresses for each device in test_hmm driver. Consequently, this configures zone device type as coherent. Signed-off-by: Alex Sierra Acked-by: Felix Kuehling Reviewed-by: Alis

[PATCH v6 08/14] lib: test_hmm add ioctl to get zone device type

new ioctl cmd added to query zone device type. This will be used once the test_hmm adds zone device coherent type. Signed-off-by: Alex Sierra Acked-by: Felix Kuehling Reviewed-by: Alistair Poppple Signed-off-by: Christoph Hellwig --- lib/test_hmm.c | 11 +-- lib/test_hmm_uapi.h

[PATCH v6 03/14] mm: add device coherent vma selection for memory migration

This case is used to migrate pages from device memory, back to system memory. Device coherent type memory is cache coherent from device and CPU point of view. Signed-off-by: Alex Sierra Acked-by: Felix Kuehling Reviewed-by: Alistair Poppple Signed-off-by: Christoph Hellwig --- include/linux

[PATCH v6 04/14] mm: remove the vma check in migrate_vma_setup()

From: Alistair Popple migrate_vma_setup() checks that a valid vma is passed so that the page tables can be walked to find the pfns associated with a given address range. However in some cases the pfns are already known, such as when migrating device coherent pages during pin_user_pages() meaning

[PATCH v6 05/14] mm/gup: migrate device coherent pages when pinning instead of failing

From: Alistair Popple Currently any attempts to pin a device coherent page will fail. This is because device coherent pages need to be managed by a device driver, and pinning them would prevent a driver from migrating them off the device. However this is no reason to fail pinning of these pages.

[PATCH v6 02/14] mm: handling Non-LRU pages returned by vm_normal_pages

flag that adds the same behaviour to follow_page and related APIs, to allow callers to specify that they expect to put pages on an LRU list. Signed-off-by: Alex Sierra Acked-by: Felix Kuehling Reviewed-by: Alistair Popple --- fs/proc/task_mmu.c | 2 +- include/linux/mm.h | 3 ++- mm/

[PATCH v6 01/14] mm: add zone device coherent type memory support

. Signed-off-by: Alex Sierra Acked-by: Felix Kuehling Reviewed-by: Alistair Popple [hch: rebased ontop of the refcount changes, removed is_dev_private_or_coherent_page] Signed-off-by: Christoph Hellwig --- include/linux/memremap.h | 19 +++ mm/memcontrol.c | 7

[PATCH v6 00/14] Add MEMORY_DEVICE_COHERENT for coherent device memory mapping

hmm and selftest/vm/hmm-test.c. v6: - Rebase to 5.19.0-rc4 - Rename is_pinnable_page to is_longterm_pinnable_page and add a coherent device checker. - Add a new gup test to hmm-test to cover fast pinnable case with FOLL_LONGTERM Alex Sierra (12): mm: add zone device coherent type memory sup

[PATCH v5 12/13] tools: add hmm gup tests for device coherent type

The intention is to test hmm device coherent type under different get user pages paths. Also, test gup with FOLL_LONGTERM flag set in device coherent pages. These pages should get migrated back to system memory. Signed-off-by: Alex Sierra Reviewed-by: Alistair Popple --- tools/testing

[PATCH v5 11/13] tools: update test_hmm script to support SP config

Add two more parameters to set spm_addr_dev0 & spm_addr_dev1 addresses. These two parameters configure the start SP addresses for each device in test_hmm driver. Consequently, this configures zone device type as coherent. Signed-off-by: Alex Sierra Acked-by: Felix Kuehling Reviewed-by: Alis

[PATCH v5 09/13] lib: add support for device coherent type in test_hmm

e 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. Signed-off-by: Alex Sierra Acked-by: Felix Kuehling Reviewed-by:

[PATCH v5 10/13] tools: update hmm-test to support device coherent type

migrate_ping_pong test case added to test explicit migration from device to sys memory for both private and coherent zone types. Helpers to migrate from device to sys memory and vicerversa were also added. Signed-off-by: Alex Sierra Acked-by: Felix Kuehling Reviewed-by: Alistair Popple Signed-off-by

[PATCH v5 13/13] tools: add selftests to hmm for COW in device memory

are duplicated directly from device memory. Signed-off-by: Alex Sierra Acked-by: Felix Kuehling --- tools/testing/selftests/vm/hmm-tests.c | 80 ++ 1 file changed, 80 insertions(+) diff --git a/tools/testing/selftests/vm/hmm-tests.c b/tools/testing/selftests/vm/hmm

[PATCH v5 07/13] lib: test_hmm add ioctl to get zone device type

new ioctl cmd added to query zone device type. This will be used once the test_hmm adds zone device coherent type. Signed-off-by: Alex Sierra Acked-by: Felix Kuehling Reviewed-by: Alistair Poppple Signed-off-by: Christoph Hellwig --- lib/test_hmm.c | 11 +-- lib/test_hmm_uapi.h

[PATCH v5 08/13] lib: test_hmm add module param for zone device type

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. Signed-off-by: Alex Sierra Acked-by: F

[PATCH v5 06/13] drm/amdkfd: add SPM support for SVM

. Also, MIGRATE_VMA_SELECT_DEVICE_COHERENT flag is selected for coherent type case during migration to device. Signed-off-by: Alex Sierra Reviewed-by: Felix Kuehling Signed-off-by: Christoph Hellwig --- drivers/gpu/drm/amd/amdkfd/kfd_migrate.c | 34 +++- 1 file changed, 21

[PATCH v5 03/13] mm: add device coherent vma selection for memory migration

This case is used to migrate pages from device memory, back to system memory. Device coherent type memory is cache coherent from device and CPU point of view. Signed-off-by: Alex Sierra Acked-by: Felix Kuehling Reviewed-by: Alistair Poppple Signed-off-by: Christoph Hellwig --- include/linux

[PATCH v5 05/13] mm/gup: migrate device coherent pages when pinning instead of failing

From: Alistair Popple Currently any attempts to pin a device coherent page will fail. This is because device coherent pages need to be managed by a device driver, and pinning them would prevent a driver from migrating them off the device. However this is no reason to fail pinning of these pages.

[PATCH v5 04/13] mm: remove the vma check in migrate_vma_setup()

From: Alistair Popple migrate_vma_setup() checks that a valid vma is passed so that the page tables can be walked to find the pfns associated with a given address range. However in some cases the pfns are already known, such as when migrating device coherent pages during pin_user_pages() meaning

[PATCH v5 02/13] mm: handling Non-LRU pages returned by vm_normal_pages

flag that adds the same behaviour to follow_page and related APIs, to allow callers to specify that they expect to put pages on an LRU list. Signed-off-by: Alex Sierra Acked-by: Felix Kuehling --- fs/proc/task_mmu.c | 2 +- include/linux/mm.h | 3 ++- mm/gup.c | 6 +- mm/huge_mem

[PATCH v5 01/13] mm: add zone device coherent type memory support

. Signed-off-by: Alex Sierra Acked-by: Felix Kuehling Reviewed-by: Alistair Popple [hch: rebased ontop of the refcount changes, removed is_dev_private_or_coherent_page] Signed-off-by: Christoph Hellwig --- include/linux/memremap.h | 19 +++ mm/memcontrol.c | 7

[PATCH v5 00/13] Add MEMORY_DEVICE_COHERENT for coherent device memory mapping

quot;mm: handling Non-LRU pages returned by vm_normal_pages" reordered. - Add WARN_ON_ONCE for thp device coherent case. v4: - Rebase to latest 5.18.0 - Fix consitency between pages with FOLL_LRU flag set and pte_devmap at follow_page_pte. v5: - Remove unused zone_device_type from lib/test_hmm

[PATCH v4 09/13] lib: add support for device coherent type in test_hmm

e 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. Signed-off-by: Alex Sierra Acked-by: Felix Kuehling Reviewed-by:

[PATCH v4 13/13] tools: add selftests to hmm for COW in device memory

are duplicated directly from device memory. Signed-off-by: Alex Sierra Acked-by: Felix Kuehling --- tools/testing/selftests/vm/hmm-tests.c | 80 ++ 1 file changed, 80 insertions(+) diff --git a/tools/testing/selftests/vm/hmm-tests.c b/tools/testing/selftests/vm/hmm

[PATCH v4 08/13] lib: test_hmm add module param for zone device type

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. Signed-off-by: Alex Sierra Acked-by: F

[PATCH v4 10/13] tools: update hmm-test to support device coherent type

migrate_ping_pong test case added to test explicit migration from device to sys memory for both private and coherent zone types. Helpers to migrate from device to sys memory and vicerversa were also added. Signed-off-by: Alex Sierra Acked-by: Felix Kuehling Reviewed-by: Alistair Popple Signed-off-by

[PATCH v4 11/13] tools: update test_hmm script to support SP config

Add two more parameters to set spm_addr_dev0 & spm_addr_dev1 addresses. These two parameters configure the start SP addresses for each device in test_hmm driver. Consequently, this configures zone device type as coherent. Signed-off-by: Alex Sierra Acked-by: Felix Kuehling Reviewed-by: Alis

[PATCH v4 12/13] tools: add hmm gup tests for device coherent type

The intention is to test hmm device coherent type under different get user pages paths. Also, test gup with FOLL_LONGTERM flag set in device coherent pages. These pages should get migrated back to system memory. Signed-off-by: Alex Sierra Reviewed-by: Alistair Popple --- tools/testing

[PATCH v4 07/13] lib: test_hmm add ioctl to get zone device type

new ioctl cmd added to query zone device type. This will be used once the test_hmm adds zone device coherent type. Signed-off-by: Alex Sierra Acked-by: Felix Kuehling Reviewed-by: Alistair Poppple Signed-off-by: Christoph Hellwig --- lib/test_hmm.c | 23 +-- lib

[PATCH v4 05/13] mm/gup: migrate device coherent pages when pinning instead of failing

From: Alistair Popple Currently any attempts to pin a device coherent page will fail. This is because device coherent pages need to be managed by a device driver, and pinning them would prevent a driver from migrating them off the device. However this is no reason to fail pinning of these pages.

[PATCH v4 06/13] drm/amdkfd: add SPM support for SVM

. Also, MIGRATE_VMA_SELECT_DEVICE_COHERENT flag is selected for coherent type case during migration to device. Signed-off-by: Alex Sierra Reviewed-by: Felix Kuehling Signed-off-by: Christoph Hellwig --- drivers/gpu/drm/amd/amdkfd/kfd_migrate.c | 34 +++- 1 file changed, 21

[PATCH v4 00/13] Add MEMORY_DEVICE_COHERENT for coherent device memory mapping

quot;mm: handling Non-LRU pages returned by vm_normal_pages" reordered. - Add WARN_ON_ONCE for thp device coherent case. v4: - Rebase to latest 5.18.0 - Fix consitency between pages with FOLL_LRU flag set and pte_devmap at follow_page_pte. Alex Sierra (11): mm: add zone device coherent typ

[PATCH v4 04/13] mm: remove the vma check in migrate_vma_setup()

From: Alistair Popple migrate_vma_setup() checks that a valid vma is passed so that the page tables can be walked to find the pfns associated with a given address range. However in some cases the pfns are already known, such as when migrating device coherent pages during pin_user_pages() meaning

[PATCH v4 02/13] mm: handling Non-LRU pages returned by vm_normal_pages

flag that adds the same behaviour to follow_page and related APIs, to allow callers to specify that they expect to put pages on an LRU list. Signed-off-by: Alex Sierra Acked-by: Felix Kuehling --- fs/proc/task_mmu.c | 2 +- include/linux/mm.h | 3 ++- mm/gup.c | 6 +- mm/huge_mem

[PATCH v4 03/13] mm: add device coherent vma selection for memory migration

This case is used to migrate pages from device memory, back to system memory. Device coherent type memory is cache coherent from device and CPU point of view. Signed-off-by: Alex Sierra Acked-by: Felix Kuehling Reviewed-by: Alistair Poppple Signed-off-by: Christoph Hellwig --- include/linux

[PATCH v4 01/13] mm: add zone device coherent type memory support

. Signed-off-by: Alex Sierra Acked-by: Felix Kuehling Reviewed-by: Alistair Popple [hch: rebased ontop of the refcount changes, removed is_dev_private_or_coherent_page] Signed-off-by: Christoph Hellwig --- include/linux/memremap.h | 19 +++ mm/memcontrol.c | 7

[PATCH v3 13/13] tools: add selftests to hmm for COW in device memory

are duplicated directly from device memory. Signed-off-by: Alex Sierra Acked-by: Felix Kuehling --- tools/testing/selftests/vm/hmm-tests.c | 80 ++ 1 file changed, 80 insertions(+) diff --git a/tools/testing/selftests/vm/hmm-tests.c b/tools/testing/selftests/vm/hmm

[PATCH v3 10/13] tools: update hmm-test to support device coherent type

migrate_ping_pong test case added to test explicit migration from device to sys memory for both private and coherent zone types. Helpers to migrate from device to sys memory and vicerversa were also added. Signed-off-by: Alex Sierra Acked-by: Felix Kuehling Reviewed-by: Alistair Popple Signed-off-by

[PATCH v3 04/13] mm: remove the vma check in migrate_vma_setup()

From: Alistair Popple migrate_vma_setup() checks that a valid vma is passed so that the page tables can be walked to find the pfns associated with a given address range. However in some cases the pfns are already known, such as when migrating device coherent pages during pin_user_pages() meaning

[PATCH v3 12/13] tools: add hmm gup tests for device coherent type

The intention is to test hmm device coherent type under different get user pages paths. Also, test gup with FOLL_LONGTERM flag set in device coherent pages. These pages should get migrated back to system memory. Signed-off-by: Alex Sierra Reviewed-by: Alistair Popple --- tools/testing

[PATCH v3 09/13] lib: add support for device coherent type in test_hmm

e 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. Signed-off-by: Alex Sierra Acked-by: Felix Kuehling Reviewed-by:

[PATCH v3 02/13] mm: handling Non-LRU pages returned by vm_normal_pages

flag that adds the same behaviour to follow_page and related APIs, to allow callers to specify that they expect to put pages on an LRU list. Signed-off-by: Alex Sierra Acked-by: Felix Kuehling --- fs/proc/task_mmu.c | 2 +- include/linux/mm.h | 3 ++- mm/gup.c | 2 ++ mm/huge_memory.c

[PATCH v3 08/13] lib: test_hmm add module param for zone device type

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. Signed-off-by: Alex Sierra Acked-by: F

[PATCH v3 11/13] tools: update test_hmm script to support SP config

Add two more parameters to set spm_addr_dev0 & spm_addr_dev1 addresses. These two parameters configure the start SP addresses for each device in test_hmm driver. Consequently, this configures zone device type as coherent. Signed-off-by: Alex Sierra Acked-by: Felix Kuehling Reviewed-by: Alis

[PATCH v3 07/13] lib: test_hmm add ioctl to get zone device type

new ioctl cmd added to query zone device type. This will be used once the test_hmm adds zone device coherent type. Signed-off-by: Alex Sierra Acked-by: Felix Kuehling Reviewed-by: Alistair Poppple Signed-off-by: Christoph Hellwig --- lib/test_hmm.c | 23 +-- lib

[PATCH v3 03/13] mm: add device coherent vma selection for memory migration

This case is used to migrate pages from device memory, back to system memory. Device coherent type memory is cache coherent from device and CPU point of view. Signed-off-by: Alex Sierra Acked-by: Felix Kuehling Reviewed-by: Alistair Poppple Signed-off-by: Christoph Hellwig --- include/linux

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