linux.git/arch/powerpc/include/asm/pgtable.h, branch v6.9

mm/treewide: drop pXd_large()

2024-03-06T21:04:19+00:00

They're not used anymore, drop all of them.

Link: https://lkml.kernel.org/r/20240305043750.93762-10-peterx@redhat.com
Signed-off-by: Peter Xu 
Reviewed-by: Jason Gunthorpe 
Reviewed-by: Mike Rapoport (IBM) 
Cc: Alexander Potapenko 
Cc: Andrey Konovalov 
Cc: Andrey Ryabinin 
Cc: "Aneesh Kumar K.V" 
Cc: Borislav Petkov 
Cc: Christophe Leroy 
Cc: Dave Hansen 
Cc: Dmitry Vyukov 
Cc: Ingo Molnar 
Cc: Kirill A. Shutemov 
Cc: Michael Ellerman 
Cc: Muchun Song 
Cc: "Naveen N. Rao" 
Cc: Nicholas Piggin 
Cc: Thomas Gleixner 
Cc: Vincenzo Frascino 
Cc: Yang Shi 
Signed-off-by: Andrew Morton

mm/powerpc: replace pXd_is_leaf() with pXd_leaf()

2024-03-06T21:04:19+00:00

They're the same macros underneath.  Drop pXd_is_leaf(), instead always use
pXd_leaf().

At the meantime, instead of renames, drop the pXd_is_leaf() fallback
definitions directly in arch/powerpc/include/asm/pgtable.h.  because
similar fallback macros for pXd_leaf() are already defined in
include/linux/pgtable.h.

Link: https://lkml.kernel.org/r/20240305043750.93762-3-peterx@redhat.com
Signed-off-by: Peter Xu 
Suggested-by: Christophe Leroy 
Reviewed-by: Jason Gunthorpe 
Reviewed-by: Christophe Leroy 
Reviewed-by: Mike Rapoport (IBM) 
Cc: Michael Ellerman 
Cc: Nicholas Piggin 
Cc: "Aneesh Kumar K.V" 
Cc: "Naveen N. Rao" 
Cc: Alexander Potapenko 
Cc: Andrey Konovalov 
Cc: Andrey Ryabinin 
Cc: Borislav Petkov 
Cc: Dave Hansen 
Cc: Dmitry Vyukov 
Cc: Ingo Molnar 
Cc: Kirill A. Shutemov 
Cc: Muchun Song 
Cc: Thomas Gleixner 
Cc: Vincenzo Frascino 
Cc: Yang Shi 
Signed-off-by: Andrew Morton

mm/powerpc: define pXd_large() with pXd_leaf()

2024-03-06T21:04:19+00:00

Patch series "mm/treewide: Replace pXd_large() with pXd_leaf()", v3.

These two APIs are mostly always the same.  It's confusing to have both of
them.  Merge them into one.  Here I used pXd_leaf() only because
pXd_leaf() is a global API which is always defined, while pXd_large() is
not.

We have yet one more API that is similar which is pXd_huge(), but that's
even trickier, so let's do it step by step.

Some special cares are taken for ppc and x86, they're done as separate
cleanups first.  


This patch (of 10):

The two definitions are the same.  The only difference is that pXd_large()
is only defined with THP selected, and only on book3s 64bits.

Instead of implementing it twice, make pXd_large() a macro to pXd_leaf(). 
Define it unconditionally just like pXd_leaf().  This helps to prepare
merging the two APIs.

Link: https://lkml.kernel.org/r/20240305043750.93762-1-peterx@redhat.com
Link: https://lkml.kernel.org/r/20240305043750.93762-2-peterx@redhat.com
Signed-off-by: Peter Xu 
Reviewed-by: Jason Gunthorpe 
Reviewed-by: Mike Rapoport (IBM) 
Cc: Michael Ellerman 
Cc: Nicholas Piggin 
Cc: Christophe Leroy 
Cc: "Aneesh Kumar K.V" 
Cc: "Naveen N. Rao" 
Cc: Kirill A. Shutemov 
Cc: Muchun Song 
Cc: Yang Shi 
Cc: Alexander Potapenko 
Cc: Andrey Konovalov 
Cc: Andrey Ryabinin 
Cc: Borislav Petkov 
Cc: Dave Hansen 
Cc: Dmitry Vyukov 
Cc: Ingo Molnar 
Cc: Thomas Gleixner 
Cc: Vincenzo Frascino 
Signed-off-by: Andrew Morton

powerpc/pgtable: define PFN_PTE_SHIFT

2024-02-22T18:24:50+00:00

We want to make use of pte_next_pfn() outside of set_ptes().  Let's simply
define PFN_PTE_SHIFT, required by pte_next_pfn().

Link: https://lkml.kernel.org/r/20240129124649.189745-5-david@redhat.com
Signed-off-by: David Hildenbrand 
Reviewed-by: Christophe Leroy 
Tested-by: Ryan Roberts 
Reviewed-by: Mike Rapoport (IBM) 
Cc: Albert Ou 
Cc: Alexander Gordeev 
Cc: Alexandre Ghiti 
Cc: Aneesh Kumar K.V 
Cc: Catalin Marinas 
Cc: Christian Borntraeger 
Cc: David S. Miller 
Cc: Dinh Nguyen 
Cc: Gerald Schaefer 
Cc: Heiko Carstens 
Cc: Matthew Wilcox 
Cc: Michael Ellerman 
Cc: Naveen N. Rao 
Cc: Nicholas Piggin 
Cc: Palmer Dabbelt 
Cc: Paul Walmsley 
Cc: Russell King (Oracle) 
Cc: Sven Schnelle 
Cc: Vasily Gorbik 
Cc: Will Deacon 
Signed-off-by: Andrew Morton

powerpc: Remove file parameter from phys_mem_access_prot()

2023-11-06T04:21:33+00:00

Remove 'file' parameter from struct machdep_calls.phys_mem_access_prot
and its implementation in pci_phys_mem_access_prot(). The file is not
used on PowerPC. By removing it, a later patch can simplify fbdev's
mmap code, which uses phys_mem_access_prot() on PowerPC.

Signed-off-by: Thomas Zimmermann 
Reviewed-by: Arnd Bergmann 
[mpe: Rebase on unrelated changes to phys_mem_access_prot()]
Signed-off-by: Michael Ellerman 
Link: https://msgid.link/20230922080636.26762-5-tzimmermann@suse.de

powerpc: Implement and use pgprot_nx()

2023-10-19T06:12:45+00:00

ioremap_page_range() calls pgprot_nx() vmap() and vmap_pfn()
clear execute permission by calling pgprot_nx().

When pgprot_nx() is not defined it falls back to a nop.

Implement it for powerpc then use it in early_ioremap_range().

Then the call to pte_exprotect() can be removed from ioremap_prot().

Signed-off-by: Christophe Leroy 
Signed-off-by: Michael Ellerman 
Link: https://msgid.link/5993a7a097e989af1c97fc4a6c011fefc67dbe6e.1695659959.git.christophe.leroy@csgroup.eu

powerpc: Refactor update_mmu_cache_range()

2023-10-19T06:12:44+00:00

On nohash, this function voids except for E500 with hugepages.

On book3s, this function is for hash MMUs only.

Combine those tests and rename E500 update_mmu_cache_range()
as __update_mmu_cache() which gets called by
update_mmu_cache_range().

Signed-off-by: Christophe Leroy 
Signed-off-by: Michael Ellerman 
Link: https://msgid.link/b029842cb6783cbeb43d202e69a90341d65295a4.1695659959.git.christophe.leroy@csgroup.eu

powerpc: Deduplicate prototypes of ptep_set_access_flags() and phys_mem_access_prot()

2023-10-19T06:12:44+00:00

Prototypes of ptep_set_access_flags() and phys_mem_access_prot() are identical
for book3s and nohash.

Deduplicate them.

Signed-off-by: Christophe Leroy 
Signed-off-by: Michael Ellerman 
Link: https://msgid.link/b846832cce842a2852615b7356937fb9507e436d.1695659959.git.christophe.leroy@csgroup.eu

Merge tag 'powerpc-6.6-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux

2023-08-31T19:43:10+00:00

Pull powerpc updates from Michael Ellerman:

 - Add HOTPLUG_SMT support (/sys/devices/system/cpu/smt) and honour the
   configured SMT state when hotplugging CPUs into the system

 - Combine final TLB flush and lazy TLB mm shootdown IPIs when using the
   Radix MMU to avoid a broadcast TLBIE flush on exit

 - Drop the exclusion between ptrace/perf watchpoints, and drop the now
   unused associated arch hooks

 - Add support for the "nohlt" command line option to disable CPU idle

 - Add support for -fpatchable-function-entry for ftrace, with GCC >=
   13.1

 - Rework memory block size determination, and support 256MB size on
   systems with GPUs that have hotpluggable memory

 - Various other small features and fixes

Thanks to Andrew Donnellan, Aneesh Kumar K.V, Arnd Bergmann, Athira
Rajeev, Benjamin Gray, Christophe Leroy, Frederic Barrat, Gautam
Menghani, Geoff Levand, Hari Bathini, Immad Mir, Jialin Zhang, Joel
Stanley, Jordan Niethe, Justin Stitt, Kajol Jain, Kees Cook, Krzysztof
Kozlowski, Laurent Dufour, Liang He, Linus Walleij, Mahesh Salgaonkar,
Masahiro Yamada, Michal Suchanek, Nageswara R Sastry, Nathan Chancellor,
Nathan Lynch, Naveen N Rao, Nicholas Piggin, Nick Desaulniers, Omar
Sandoval, Randy Dunlap, Reza Arbab, Rob Herring, Russell Currey, Sourabh
Jain, Thomas Gleixner, Trevor Woerner, Uwe Kleine-König, Vaibhav Jain,
Xiongfeng Wang, Yuan Tan, Zhang Rui, and Zheng Zengkai.

* tag 'powerpc-6.6-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: (135 commits)
  macintosh/ams: linux/platform_device.h is needed
  powerpc/xmon: Reapply "Relax frame size for clang"
  powerpc/mm/book3s64: Use 256M as the upper limit with coherent device memory attached
  powerpc/mm/book3s64: Fix build error with SPARSEMEM disabled
  powerpc/iommu: Fix notifiers being shared by PCI and VIO buses
  powerpc/mpc5xxx: Add missing fwnode_handle_put()
  powerpc/config: Disable SLAB_DEBUG_ON in skiroot
  powerpc/pseries: Remove unused hcall tracing instruction
  powerpc/pseries: Fix hcall tracepoints with JUMP_LABEL=n
  powerpc: dts: add missing space before {
  powerpc/eeh: Use pci_dev_id() to simplify the code
  powerpc/64s: Move CPU -mtune options into Kconfig
  powerpc/powermac: Fix unused function warning
  powerpc/pseries: Rework lppaca_shared_proc() to avoid DEBUG_PREEMPT
  powerpc: Don't include lppaca.h in paca.h
  powerpc/pseries: Move hcall_vphn() prototype into vphn.h
  powerpc/pseries: Move VPHN constants into vphn.h
  cxl: Drop unused detach_spa()
  powerpc: Drop zalloc_maybe_bootmem()
  powerpc/powernv: Use struct opal_prd_msg in more places
  ...

powerpc: implement the new page table range API

2023-08-24T23:20:23+00:00

Add set_ptes(), update_mmu_cache_range() and flush_dcache_folio().  Change
the PG_arch_1 (aka PG_dcache_dirty) flag from being per-page to per-folio.

[willy@infradead.org: re-export flush_dcache_icache_folio()]
  Link: https://lkml.kernel.org/r/ZMx1daYwvD9EM7Cv@casper.infradead.org
Link: https://lkml.kernel.org/r/20230802151406.3735276-22-willy@infradead.org
Signed-off-by: Matthew Wilcox (Oracle) 
Acked-by: Mike Rapoport (IBM) 
Cc: Michael Ellerman 
Cc: Nicholas Piggin 
Cc: Christophe Leroy 
Signed-off-by: Andrew Morton