kernel/drivers/misc/ocxl/link.c, branch linux-rolling-stable

misc: ocxl: link: Remove unnecessary (void*) conversions

2023-11-27T11:01:14Z

The link pointer does not need to cast the type. Signed-off-by: Li zeming Acked-by: Andrew Donnellan Acked-by: Frederic Barrat Signed-off-by: Michael Ellerman Link: https://msgid.link/20231113014533.11064-1-zeming@nfschina.com

mmu_notifiers: rename invalidate_range notifier

2023-08-18T17:12:41Z

There are two main use cases for mmu notifiers. One is by KVM which uses mmu_notifier_invalidate_range_start()/end() to manage a software TLB. The other is to manage hardware TLBs which need to use the invalidate_range() callback because HW can establish new TLB entries at any time. Hence using start/end() can lead to memory corruption as these callbacks happen too soon/late during page unmap. mmu notifier users should therefore either use the start()/end() callbacks or the invalidate_range() callbacks. To make this usage clearer rename the invalidate_range() callback to arch_invalidate_secondary_tlbs() and update documention. Link: https://lkml.kernel.org/r/6f77248cd25545c8020a54b4e567e8b72be4dca1.1690292440.git-series.apopple@nvidia.com Signed-off-by: Alistair Popple Suggested-by: Jason Gunthorpe Acked-by: Catalin Marinas Reviewed-by: Jason Gunthorpe Cc: Andrew Donnellan Cc: Chaitanya Kumar Borah Cc: Frederic Barrat Cc: Jason Gunthorpe Cc: John Hubbard Cc: Kevin Tian Cc: Michael Ellerman Cc: Nicholas Piggin Cc: Nicolin Chen Cc: Robin Murphy Cc: Sean Christopherson Cc: SeongJae Park Cc: Tvrtko Ursulin Cc: Will Deacon Cc: Zhi Wang Signed-off-by: Andrew Morton

cxl/ocxl: Prepare cleanup of powerpc's asm/prom.h

2022-05-11T13:06:39Z

powerpc's asm/prom.h brings some headers that it doesn't need itself. In order to clean it up, first add missing headers in users of asm/prom.h Signed-off-by: Christophe Leroy Acked-by: Frederic Barrat Acked-by: Andrew Donnellan Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/a2bae89b280e7a7cb87889635d9911d6a245e780.1648833388.git.christophe.leroy@csgroup.eu

ocxl: Make use of the helper macro LIST_HEAD()

2022-02-25T11:09:56Z

Replace "struct list_head head = LIST_HEAD_INIT(head)" with "LIST_HEAD(head)" to simplify the code. Acked-by: Frederic Barrat Acked-by: Andrew Donnellan Signed-off-by: Cai Huoqing Link: https://lore.kernel.org/r/20220209032421.37725-1-cai.huoqing@linux.dev Signed-off-by: Greg Kroah-Hartman

ocxl: Add new kernel traces

2020-12-03T14:01:30Z

Add specific kernel traces which provide information on mmu notifier and on pages range. Signed-off-by: Christophe Lombard Acked-by: Frederic Barrat Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20201125155013.39955-6-clombard@linux.vnet.ibm.com

ocxl: Add mmu notifier

2020-12-03T14:01:30Z

Add invalidate_range mmu notifier, when required (ATSD access of MMIO registers is available), to initiate TLB invalidation commands. For the time being, the ATSD0 set of registers is used by default. The pasid and bdf values have to be configured in the Process Element Entry. The PEE must be set up to match the BDF/PASID of the AFU. Signed-off-by: Christophe Lombard Acked-by: Frederic Barrat Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20201125155013.39955-5-clombard@linux.vnet.ibm.com

ocxl: Update the Process Element Entry

2020-12-03T14:01:30Z

To complete the MMIO based mechanism, the fields: PASID, bus, device and function of the Process Element Entry have to be filled. (See OpenCAPI Power Platform Architecture document) Hypervisor Process Element Entry Word 0 1 .... 7 8 ...... 12 13 ..15 16.... 19 20 ........... 31 0 OSL Configuration State (0:31) 1 OSL Configuration State (32:63) 2 PASID | Reserved 3 Bus | Device |Function | Reserved 4 Reserved 5 Reserved 6 .... Signed-off-by: Christophe Lombard Acked-by: Frederic Barrat Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20201125155013.39955-4-clombard@linux.vnet.ibm.com

ocxl: Don't return trigger page when allocating an interrupt

2020-08-24T15:31:31Z

Existing users of ocxl_link_irq_alloc() have been converted to obtain the trigger page of an interrupt through xive directly, we therefore have no need to return the trigger page when allocating an interrupt. It also allows ocxl to use the xive native interface to allocate interrupts, instead of its custom service. Signed-off-by: Frederic Barrat Reviewed-by: Cédric Le Goater Reviewed-by: Greg Kurz Acked-by: Andrew Donnellan Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20200403153838.29224-4-fbarrat@linux.ibm.com

ocxl: Allow contexts to be attached with a NULL mm

2019-07-03T19:29:47Z

If an OpenCAPI context is to be used directly by a kernel driver, there may not be a suitable mm to use. The patch makes the mm parameter to ocxl_context_attach optional. Signed-off-by: Alastair D'Silva Acked-by: Andrew Donnellan Acked-by: Frederic Barrat Acked-by: Nicholas Piggin Link: https://lore.kernel.org/r/20190620041203.12274-1-alastair@au1.ibm.com Signed-off-by: Greg Kroah-Hartman

ocxl: Rename struct link to ocxl_link

2019-05-02T16:55:00Z

The term 'link' is ambiguous (especially when the struct is used for a list), so rename it for clarity. Signed-off-by: Alastair D'Silva Reviewed-by: Greg Kurz Acked-by: Frederic Barrat Acked-by: Andrew Donnellan Signed-off-by: Michael Ellerman