Changes in ioremap.c

86758b50 - mm/ioremap: pass pgprot_t to ioremap_prot() instead of unsigned long

Tue, 18 Feb 2025 10:19:54 +0000

mm/ioremap: pass pgprot_t to ioremap_prot() instead of unsigned longioremap_prot() currently accepts pgprot_val parameter as an unsigned long,thus implicitly assuming that pgprot_val and pgprot_t could never bebigger than unsigned long. But this assumption soon will not be true onarm64 when using D128 pgtables. In 128 bit page table configuration,unsigned long is 64 bit, but pgprot_t is 128 bit.Passing platform abstracted pgprot_t argument is better as compared tosize based data types. Let's change the parameter to directly passpgprot_t like another similar helper generic_ioremap_prot().Without this change in place, D128 configuration does not work on arm64 asthe top 64 bits gets silently stripped when passing the protection valueto this function.Link: https://lkml.kernel.org/r/20250218101954.415331-1-anshuman.khandual@arm.comSigned-off-by: Ryan Roberts Co-developed-by: Anshuman Khandual Signed-off-by: Anshuman Khandual Acked-by: Catalin Marinas [arm64]Signed-off-by: Andrew Morton List of files: /linux-6.15/mm/ioremap.c

95da27c4 - mm: ioremap: remove unneeded ioremap_allowed and iounmap_allowed

Thu, 06 Jul 2023 15:45:20 +0000

mm: ioremap: remove unneeded ioremap_allowed and iounmap_allowedNow there are no users of ioremap_allowed and iounmap_allowed, cleanthem up.Link: https://lkml.kernel.org/r/20230706154520.11257-20-bhe@redhat.comSigned-off-by: Baoquan He Reviewed-by: Christoph Hellwig Reviewed-by: Kefeng Wang Reviewed-by: Mike Rapoport (IBM) Cc: Alexander Gordeev Cc: Arnd Bergmann Cc: Brian Cain Cc: Catalin Marinas Cc: Christian Borntraeger Cc: Christophe Leroy Cc: Chris Zankel Cc: David Laight Cc: Geert Uytterhoeven Cc: Gerald Schaefer Cc: Heiko Carstens Cc: Helge Deller Cc: "James E.J. Bottomley" Cc: John Paul Adrian Glaubitz Cc: Jonas Bonn Cc: Matthew Wilcox Cc: Max Filippov Cc: Michael Ellerman Cc: Nathan Chancellor Cc: Nicholas Piggin Cc: Niklas Schnelle Cc: Rich Felker Cc: Stafford Horne Cc: Stefan Kristiansson Cc: Sven Schnelle Cc: Vasily Gorbik Cc: Vineet Gupta Cc: Will Deacon Cc: Yoshinori Sato Signed-off-by: Andrew Morton List of files: /linux-6.15/mm/ioremap.c

016fec91 - mm: move is_ioremap_addr() into new header file

Thu, 06 Jul 2023 15:45:17 +0000

mm: move is_ioremap_addr() into new header fileNow is_ioremap_addr() is only used in kernel/iomem.c and gonna be used inmm/ioremap.c. Move it into its own new header file linux/ioremap.h.Link: https://lkml.kernel.org/r/20230706154520.11257-17-bhe@redhat.comSuggested-by: Christoph Hellwig Signed-off-by: Baoquan He Reviewed-by: Christoph Hellwig Cc: Alexander Gordeev Cc: Arnd Bergmann Cc: Brian Cain Cc: Catalin Marinas Cc: Christian Borntraeger Cc: Christophe Leroy Cc: Chris Zankel Cc: David Laight Cc: Geert Uytterhoeven Cc: Gerald Schaefer Cc: Heiko Carstens Cc: Helge Deller Cc: "James E.J. Bottomley" Cc: John Paul Adrian Glaubitz Cc: Jonas Bonn Cc: Kefeng Wang Cc: Matthew Wilcox Cc: Max Filippov Cc: Michael Ellerman Cc: Mike Rapoport (IBM) Cc: Nathan Chancellor Cc: Nicholas Piggin Cc: Niklas Schnelle Cc: Rich Felker Cc: Stafford Horne Cc: Stefan Kristiansson Cc: Sven Schnelle Cc: Vasily Gorbik Cc: Vineet Gupta Cc: Will Deacon Cc: Yoshinori Sato Signed-off-by: Andrew Morton List of files: /linux-6.15/mm/ioremap.c

ab1cd020 - mm/ioremap: consider IOREMAP space in generic ioremap

Thu, 06 Jul 2023 15:45:16 +0000

mm/ioremap: consider IOREMAP space in generic ioremapArchitectures like powerpc have a dedicated space for IOREMAP mappings.If so, use it in generic_ioremap_prot().Link: https://lkml.kernel.org/r/20230706154520.11257-16-bhe@redhat.comSigned-off-by: Christophe Leroy Signed-off-by: Baoquan He Reviewed-by: Christoph Hellwig Cc: Alexander Gordeev Cc: Arnd Bergmann Cc: Brian Cain Cc: Catalin Marinas Cc: Christian Borntraeger Cc: Chris Zankel Cc: David Laight Cc: Geert Uytterhoeven Cc: Gerald Schaefer Cc: Heiko Carstens Cc: Helge Deller Cc: "James E.J. Bottomley" Cc: John Paul Adrian Glaubitz Cc: Jonas Bonn Cc: Kefeng Wang Cc: Matthew Wilcox Cc: Max Filippov Cc: Michael Ellerman Cc: Mike Rapoport (IBM) Cc: Nathan Chancellor Cc: Nicholas Piggin Cc: Niklas Schnelle Cc: Rich Felker Cc: Stafford Horne Cc: Stefan Kristiansson Cc: Sven Schnelle Cc: Vasily Gorbik Cc: Vineet Gupta Cc: Will Deacon Cc: Yoshinori Sato Signed-off-by: Andrew Morton List of files: /linux-6.15/mm/ioremap.c

a5f61648 - mm/ioremap: add slab availability checking in ioremap_prot

Thu, 06 Jul 2023 15:45:07 +0000

mm/ioremap: add slab availability checking in ioremap_protSeveral architectures has done checking if slab if available inioremap_prot(). In fact it should be done in generic ioremap_prot() sinceon any architecutre, slab allocator must be available beforeget_vm_area_caller() and vunmap() are used.Add the checking into generic_ioremap_prot().Link: https://lkml.kernel.org/r/20230706154520.11257-7-bhe@redhat.comSuggested-by: Christophe Leroy Signed-off-by: Baoquan He Reviewed-by: Christoph Hellwig Reviewed-by: Kefeng Wang Reviewed-by: Mike Rapoport (IBM) Cc: Alexander Gordeev Cc: Arnd Bergmann Cc: Brian Cain Cc: Catalin Marinas Cc: Christian Borntraeger Cc: Chris Zankel Cc: David Laight Cc: Geert Uytterhoeven Cc: Gerald Schaefer Cc: Heiko Carstens Cc: Helge Deller Cc: "James E.J. Bottomley" Cc: John Paul Adrian Glaubitz Cc: Jonas Bonn Cc: Matthew Wilcox Cc: Max Filippov Cc: Michael Ellerman Cc: Nathan Chancellor Cc: Nicholas Piggin Cc: Niklas Schnelle Cc: Rich Felker Cc: Stafford Horne Cc: Stefan Kristiansson Cc: Sven Schnelle Cc: Vasily Gorbik Cc: Vineet Gupta Cc: Will Deacon Cc: Yoshinori Sato Signed-off-by: Andrew Morton List of files: /linux-6.15/mm/ioremap.c

dfdc6ba9 - mm: ioremap: allow ARCH to have its own ioremap method definition

Thu, 06 Jul 2023 15:45:06 +0000

mm: ioremap: allow ARCH to have its own ioremap method definitionArchitectures can be converted to GENERIC_IOREMAP, to take standardioremap_xxx() and iounmap() way. But some ARCH-es could have specifichandling for ioremap_prot(), ioremap() and iounmap(), than standardmethods.In oder to convert these ARCH-es to take GENERIC_IOREMAP method, allowthese architecutres to have their own ioremap_prot(), ioremap() andiounmap() definitions.Link: https://lkml.kernel.org/r/20230706154520.11257-6-bhe@redhat.comSigned-off-by: Baoquan He Acked-by: Arnd Bergmann Reviewed-by: Christoph Hellwig Reviewed-by: Kefeng Wang Reviewed-by: Mike Rapoport (IBM) Cc: Alexander Gordeev Cc: Brian Cain Cc: Catalin Marinas Cc: Christian Borntraeger Cc: Christophe Leroy Cc: Chris Zankel Cc: David Laight Cc: Geert Uytterhoeven Cc: Gerald Schaefer Cc: Heiko Carstens Cc: Helge Deller Cc: "James E.J. Bottomley" Cc: John Paul Adrian Glaubitz Cc: Jonas Bonn Cc: Matthew Wilcox Cc: Max Filippov Cc: Michael Ellerman Cc: Nathan Chancellor Cc: Nicholas Piggin Cc: Niklas Schnelle Cc: Rich Felker Cc: Stafford Horne Cc: Stefan Kristiansson Cc: Sven Schnelle Cc: Vasily Gorbik Cc: Vineet Gupta Cc: Will Deacon Cc: Yoshinori Sato Signed-off-by: Andrew Morton List of files: /linux-6.15/mm/ioremap.c

7613366a - mm/ioremap: define generic_ioremap_prot() and generic_iounmap()

Thu, 06 Jul 2023 15:45:05 +0000

mm/ioremap: define generic_ioremap_prot() and generic_iounmap()Define a generic version of ioremap_prot() and iounmap() thatarchitectures can call after they have performed the necessary alterationto parameters and/or necessary verifications.Link: https://lkml.kernel.org/r/20230706154520.11257-5-bhe@redhat.comSigned-off-by: Christophe Leroy Signed-off-by: Baoquan He Reviewed-by: Christoph Hellwig Reviewed-by: Kefeng Wang Reviewed-by: Mike Rapoport (IBM) Cc: Alexander Gordeev Cc: Arnd Bergmann Cc: Brian Cain Cc: Catalin Marinas Cc: Christian Borntraeger Cc: Chris Zankel Cc: David Laight Cc: Geert Uytterhoeven Cc: Gerald Schaefer Cc: Heiko Carstens Cc: Helge Deller Cc: "James E.J. Bottomley" Cc: John Paul Adrian Glaubitz Cc: Jonas Bonn Cc: Matthew Wilcox Cc: Max Filippov Cc: Michael Ellerman Cc: Nathan Chancellor Cc: Nicholas Piggin Cc: Niklas Schnelle Cc: Rich Felker Cc: Stafford Horne Cc: Stefan Kristiansson Cc: Sven Schnelle Cc: Vasily Gorbik Cc: Vineet Gupta Cc: Will Deacon Cc: Yoshinori Sato Signed-off-by: Andrew Morton List of files: /linux-6.15/mm/ioremap.c

18e780b4 - mm: ioremap: Add ioremap/iounmap_allowed()

Tue, 07 Jun 2022 12:50:25 +0000

mm: ioremap: Add ioremap/iounmap_allowed()Add special hook for architecture to verify addr, size or protwhen ioremap() or iounmap(), which will make the generic ioremapmore useful. ioremap_allowed() return a bool, - true means continue to remap - false means skip remap and return directly iounmap_allowed() return a bool, - true means continue to vunmap - false code means skip vunmap and return directlyMeanwhile, only vunmap the address when it is in vmalloc areaas the generic ioremap only returns vmalloc addresses.Acked-by: Andrew Morton Signed-off-by: Kefeng Wang Reviewed-by: Christoph Hellwig Reviewed-by: Baoquan He Link: https://lore.kernel.org/r/20220607125027.44946-5-wangkefeng.wang@huawei.comSigned-off-by: Will Deacon List of files: /linux-6.15/mm/ioremap.c

a14fff1c - mm: ioremap: Setup phys_addr of struct vm_struct

Tue, 07 Jun 2022 12:50:24 +0000

mm: ioremap: Setup phys_addr of struct vm_structShow physical address of each ioremap in /proc/vmallocinfo.Acked-by: Andrew Morton Reviewed-by: Christoph Hellwig Reviewed-by: Anshuman Khandual Signed-off-by: Kefeng Wang Link: https://lore.kernel.org/r/20220607125027.44946-4-wangkefeng.wang@huawei.comSigned-off-by: Will Deacon List of files: /linux-6.15/mm/ioremap.c

abc5992b - mm: ioremap: Use more sensible name in ioremap_prot()

Tue, 07 Jun 2022 12:50:23 +0000

mm: ioremap: Use more sensible name in ioremap_prot()Use more meaningful and sensible naming phys_addrinstead addr in ioremap_prot().Suggested-by: Andrew Morton Reviewed-by: Anshuman Khandual Signed-off-by: Kefeng Wang Reviewed-by: Baoquan He Reviewed-by: Christoph Hellwig Link: https://lore.kernel.org/r/20220610092255.32445-1-wangkefeng.wang@huawei.comSigned-off-by: Will Deacon List of files: /linux-6.15/mm/ioremap.c

82a70ce0 - mm: move ioremap_page_range to vmalloc.c

Wed, 08 Sep 2021 02:56:01 +0000

mm: move ioremap_page_range to vmalloc.cPatch series "small ioremap cleanups".The first patch moves a little code around the vmalloc/ioremap boundaryfollowing a bigger move by Nick earlier. The second enforcesnon-executable mapping on ioremap just like we do for vmap. No drivercurrently uses executable mappings anyway, as they should.This patch (of 2):This keeps it together with the implementation, and to remove thevmap_range wrapper.Link: https://lkml.kernel.org/r/20210824091259.1324527-1-hch@lst.deLink: https://lkml.kernel.org/r/20210824091259.1324527-2-hch@lst.deSigned-off-by: Christoph Hellwig Reviewed-by: Nicholas Piggin Cc: Peter Zijlstra Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds List of files: /linux-6.15/mm/ioremap.c

86d0c164 - mm/ioremap: fix iomap_max_page_shift

Sat, 15 May 2021 00:27:39 +0000

mm/ioremap: fix iomap_max_page_shiftiomap_max_page_shift is expected to contain a page shift, so it can't be a'bool', has to be an 'unsigned int'And fix the default values: P4D_SHIFT is when huge iomap is allowed.However, on some architectures (eg: powerpc book3s/64), P4D_SHIFT is not aconstant so it can't be used to initialise a static variable. So,initialise iomap_max_page_shift with a maximum shift supported by thearchitecture, it is gated by P4D_SHIFT in vmap_try_huge_p4d() anyway.Link: https://lkml.kernel.org/r/ad2d366015794a9f21320dcbdd0a8eb98979e9df.1620898113.git.christophe.leroy@csgroup.euFixes: bbc180a5adb0 ("mm: HUGE_VMAP arch support cleanup")Signed-off-by: Christophe Leroy Reviewed-by: Nicholas Piggin Reviewed-by: Anshuman Khandual Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds List of files: /linux-6.15/mm/ioremap.c

5e9e3d77 - mm: move vmap_range from mm/ioremap.c to mm/vmalloc.c

Fri, 30 Apr 2021 05:58:43 +0000

mm: move vmap_range from mm/ioremap.c to mm/vmalloc.cThis is a generic kernel virtual memory mapper, not specific to ioremap.Code is unchanged other than making vmap_range non-static.Link: https://lkml.kernel.org/r/20210317062402.533919-12-npiggin@gmail.comSigned-off-by: Nicholas Piggin Reviewed-by: Christoph Hellwig Cc: Borislav Petkov Cc: Catalin Marinas Cc: Ding Tianhong Cc: "H. Peter Anvin" Cc: Ingo Molnar Cc: Miaohe Lin Cc: Michael Ellerman Cc: Russell King Cc: Thomas Gleixner Cc: Uladzislau Rezki (Sony) Cc: Will Deacon Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds List of files: /linux-6.15/mm/ioremap.c

bbc180a5 - mm: HUGE_VMAP arch support cleanup

Fri, 30 Apr 2021 05:58:26 +0000

mm: HUGE_VMAP arch support cleanupThis changes the awkward approach where architectures provide initfunctions to determine which levels they can provide large mappings for,to one where the arch is queried for each call.This removes code and indirection, and allows constant-folding of deadcode for unsupported levels.This also adds a prot argument to the arch query. This is unusedcurrently but could help with some architectures (e.g., some powerpcprocessors can't map uncacheable memory with large pages).Link: https://lkml.kernel.org/r/20210317062402.533919-7-npiggin@gmail.comSigned-off-by: Nicholas Piggin Reviewed-by: Ding Tianhong Acked-by: Catalin Marinas [arm64]Cc: Will Deacon Cc: Thomas Gleixner Cc: Ingo Molnar Cc: Borislav Petkov Cc: "H. Peter Anvin" Cc: Christoph Hellwig Cc: Miaohe Lin Cc: Michael Ellerman Cc: Russell King Cc: Uladzislau Rezki (Sony) Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds List of files: /linux-6.15/mm/ioremap.c

95f0ddf0 - mm/ioremap: rename ioremap__range to vmap__range

Fri, 30 Apr 2021 05:58:23 +0000

mm/ioremap: rename ioremap_*_range to vmap_*_rangeThis will be used as a generic kernel virtual mapping function, so re-nameit in preparation.Link: https://lkml.kernel.org/r/20210317062402.533919-6-npiggin@gmail.comSigned-off-by: Nicholas Piggin Reviewed-by: Miaohe Lin Reviewed-by: Christoph Hellwig Cc: Borislav Petkov Cc: Catalin Marinas Cc: Ding Tianhong Cc: "H. Peter Anvin" Cc: Ingo Molnar Cc: Michael Ellerman Cc: Russell King Cc: Thomas Gleixner Cc: Uladzislau Rezki (Sony) Cc: Will Deacon Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds List of files: /linux-6.15/mm/ioremap.c

2a681cfa - mm: move p?d_alloc_track to separate header file

Fri, 07 Aug 2020 06:22:55 +0000

mm: move p?d_alloc_track to separate header fileThe functions are only used in two source files, so there is no need forthem to be in the global header. Move them to the new header and include it only where needed.Signed-off-by: Joerg Roedel Signed-off-by: Andrew Morton Reviewed-by: Pekka Enberg Cc: Peter Zijlstra (Intel) Cc: Andy Lutomirski Cc: Abdul Haleem Cc: Satheesh Rajendran Cc: Stephen Rothwell Cc: Steven Rostedt (VMware) Cc: Mike Rapoport Cc: Christophe Leroy Cc: Arnd Bergmann Cc: Max Filippov Cc: Stafford Horne Cc: Geert Uytterhoeven Cc: Matthew Wilcox Link: http://lkml.kernel.org/r/20200609120533.25867-1-joro@8bytes.orgSigned-off-by: Linus Torvalds List of files: /linux-6.15/mm/ioremap.c

ab05eabf - mm: move lib/ioremap.c to mm/

Fri, 07 Aug 2020 06:22:51 +0000

mm: move lib/ioremap.c to mm/The functionality in lib/ioremap.c deals with pagetables, vmalloc andcaches, so it naturally belongs to mm/ Moving it there will also allowdeclaring p?d_alloc_track functions in an header file inside mm/ ratherthan having those declarations in include/linux/mm.hSuggested-by: Andrew Morton Signed-off-by: Mike Rapoport Signed-off-by: Andrew Morton Reviewed-by: Pekka Enberg Cc: Abdul Haleem Cc: Andy Lutomirski Cc: Arnd Bergmann Cc: Christophe Leroy Cc: Joerg Roedel Cc: Joerg Roedel Cc: Max Filippov Cc: Peter Zijlstra (Intel) Cc: Satheesh Rajendran Cc: Stafford Horne Cc: Stephen Rothwell Cc: Steven Rostedt Cc: Geert Uytterhoeven Cc: Matthew Wilcox Link: http://lkml.kernel.org/r/20200627143453.31835-8-rppt@kernel.orgSigned-off-by: Linus Torvalds List of files: /linux-6.15/mm/ioremap.c