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2019-05-03powerpc/mm: refactor pte_alloc_one() and pte_free() families definition.Christophe Leroy5-97/+25
Functions pte_alloc_one(), pte_alloc_one_kernel(), pte_free(), pte_free_kernel() are identical for the four subarches. This patch moves their definition in a common place. Reviewed-by: Aneesh Kumar K.V <[email protected]> Signed-off-by: Christophe Leroy <[email protected]> Signed-off-by: Michael Ellerman <[email protected]>
2019-05-03powerpc/mm: inline pte_alloc_one_kernel() and pte_alloc_one() on PPC32Christophe Leroy3-16/+24
pte_alloc_one_kernel() and pte_alloc_one() are simple calls to pte_fragment_alloc(), so they are good candidates for inlining as already done on PPC64. Reviewed-by: Aneesh Kumar K.V <[email protected]> Signed-off-by: Christophe Leroy <[email protected]> Signed-off-by: Michael Ellerman <[email protected]>
2019-05-03powerpc/mm: don't use pte_alloc_kernel() until slab is available on PPC32Christophe Leroy1-6/+28
In the same way as PPC64, implement early allocation functions and avoid calling pte_alloc_kernel() before slab is available. Reviewed-by: Aneesh Kumar K.V <[email protected]> Signed-off-by: Christophe Leroy <[email protected]> Signed-off-by: Michael Ellerman <[email protected]>
2019-05-03powerpc/book3e: move early_alloc_pgtable() to init sectionChristophe Leroy1-2/+2
early_alloc_pgtable() is only used during init. Reviewed-by: Aneesh Kumar K.V <[email protected]> Signed-off-by: Christophe Leroy <[email protected]> Signed-off-by: Michael Ellerman <[email protected]>
2019-05-03powerpc/Kconfig: select PPC_MM_SLICES from subarch typeChristophe Leroy1-2/+2
Lets select PPC_MM_SLICES from the subarch config item instead of doing it via defaults declaration in the PPC_MM_SLICES item itself. Reviewed-by: Aneesh Kumar K.V <[email protected]> Signed-off-by: Christophe Leroy <[email protected]> Signed-off-by: Michael Ellerman <[email protected]>
2019-05-03powerpc/mm: get rid of nohash/32/mmu.h and nohash/64/mmu.hChristophe Leroy4-33/+14
Those files have no real added values, especially the 64 bit which only includes the common book3e mmu.h which is also included from 32 bits side. So lets do the final inclusion directly from nohash/mmu.h Reviewed-by: Aneesh Kumar K.V <[email protected]> Signed-off-by: Christophe Leroy <[email protected]> Signed-off-by: Michael Ellerman <[email protected]>
2019-05-03powerpc/mm: move pgtable_t in asm/mmu.hChristophe Leroy5-24/+3
pgtable_t is now identical for all subarches, move it to the top level asm/mmu.h Reviewed-by: Aneesh Kumar K.V <[email protected]> Signed-off-by: Christophe Leroy <[email protected]> Signed-off-by: Michael Ellerman <[email protected]>
2019-05-03powerpc/mm: convert Book3E 64 to pte_fragmentChristophe Leroy5-30/+17
Book3E 64 is the only subarch not using pte_fragment. In order to allow refactorisation, this patch converts it to pte_fragment. Reviewed-by: Aneesh Kumar K.V <[email protected]> Signed-off-by: Christophe Leroy <[email protected]> Signed-off-by: Michael Ellerman <[email protected]>
2019-05-03powerpc/mm: drop __bad_pte()Christophe Leroy2-4/+0
This has never been called (since Kernel has been in git at least), drop it. Reviewed-by: Aneesh Kumar K.V <[email protected]> Signed-off-by: Christophe Leroy <[email protected]> Signed-off-by: Michael Ellerman <[email protected]>
2019-05-03powerpc/mm: flatten function __find_linux_pte() step 3Christophe Leroy1-49/+49
__find_linux_pte() is full of if/else which is hard to follow allthough the handling is pretty simple. Previous patches left a { } block. This patch removes it. Signed-off-by: Christophe Leroy <[email protected]> Signed-off-by: Michael Ellerman <[email protected]>
2019-05-03powerpc/mm: flatten function __find_linux_pte() step 2Christophe Leroy1-32/+30
__find_linux_pte() is full of if/else which is hard to follow allthough the handling is pretty simple. Previous patch left { } blocks. This patch removes the first one by shifting its content to the left. Signed-off-by: Christophe Leroy <[email protected]> Signed-off-by: Michael Ellerman <[email protected]>
2019-05-03powerpc/mm: flatten function __find_linux_pte() step 1Christophe Leroy1-10/+22
__find_linux_pte() is full of if/else which is hard to follow allthough the handling is pretty simple. This patch flattens the function by getting rid of as much if/else as possible. In order to ease the review, this is done in three steps. Signed-off-by: Christophe Leroy <[email protected]> Signed-off-by: Michael Ellerman <[email protected]>
2019-05-03powerpc/mm: cleanup remaining ifdef mess in hugetlbpage.cChristophe Leroy1-7/+5
Only 3 subarches support huge pages. So when it is either 2 of them, it is not the third one. And mmu_has_feature() is known by all subarches so IS_ENABLED() can be used instead of #ifdef Signed-off-by: Christophe Leroy <[email protected]> Signed-off-by: Michael Ellerman <[email protected]>
2019-05-03powerpc/mm: cleanup HPAGE_SHIFT setupChristophe Leroy5-24/+30
Only book3s/64 may select default among several HPAGE_SHIFT at runtime. 8xx always defines 512K pages as default FSL_BOOK3E always defines 4M pages as default This patch limits HUGETLB_PAGE_SIZE_VARIABLE to book3s/64 moves the definitions in subarches files. Signed-off-by: Christophe Leroy <[email protected]> Signed-off-by: Michael Ellerman <[email protected]>
2019-05-03powerpc/mm: move hugetlb_disabled into asm/hugetlb.hChristophe Leroy4-1/+4
No need to have this in asm/page.h, move it into asm/hugetlb.h Signed-off-by: Christophe Leroy <[email protected]> Signed-off-by: Michael Ellerman <[email protected]>
2019-05-03powerpc/mm: cleanup ifdef mess in add_huge_page_size()Christophe Leroy4-34/+43
Introduce a subarch specific helper check_and_get_huge_psize() to check the huge page sizes and cleanup the ifdef mess in add_huge_page_size() Signed-off-by: Christophe Leroy <[email protected]> Signed-off-by: Michael Ellerman <[email protected]>
2019-05-03powerpc/mm: add a helper to populate hugepdChristophe Leroy4-19/+20
This patchs adds a subarch helper to populate hugepd. Signed-off-by: Christophe Leroy <[email protected]> Signed-off-by: Michael Ellerman <[email protected]>
2019-05-03powerpc/mm: split asm/hugetlb.h into dedicated subarch filesChristophe Leroy4-83/+106
Three subarches support hugepages: - fsl book3e - book3s/64 - 8xx This patch splits asm/hugetlb.h to reduce the #ifdef mess. Signed-off-by: Christophe Leroy <[email protected]> Signed-off-by: Michael Ellerman <[email protected]>
2019-05-03powerpc/mm: make gup_hugepte() staticChristophe Leroy2-22/+19
gup_huge_pd() is the only user of gup_hugepte() and it is located in the same file. This patch moves gup_huge_pd() after gup_hugepte() and makes gup_hugepte() static. Signed-off-by: Christophe Leroy <[email protected]> Signed-off-by: Michael Ellerman <[email protected]>
2019-05-03powerpc/mm: make hugetlbpage.c depend on CONFIG_HUGETLB_PAGEChristophe Leroy2-6/+1
The only function in hugetlbpage.c which doesn't depend on CONFIG_HUGETLB_PAGE is gup_hugepte(), and this function is only called from gup_huge_pd() which depends on CONFIG_HUGETLB_PAGE so all the content of hugetlbpage.c depends on CONFIG_HUGETLB_PAGE. This patch modifies Makefile to only compile hugetlbpage.c when CONFIG_HUGETLB_PAGE is set. Signed-off-by: Christophe Leroy <[email protected]> Signed-off-by: Michael Ellerman <[email protected]>
2019-05-03powerpc/mm: move __find_linux_pte() out of hugetlbpage.cChristophe Leroy2-103/+104
__find_linux_pte() is the only function in hugetlbpage.c which is compiled in regardless on CONFIG_HUGETLBPAGE This patch moves it in pgtable.c. Signed-off-by: Christophe Leroy <[email protected]> Signed-off-by: Michael Ellerman <[email protected]>
2019-05-03powerpc/book3e: hugetlbpage is only for CONFIG_PPC_FSL_BOOK3EChristophe Leroy2-29/+20
As per Kconfig.cputype, only CONFIG_PPC_FSL_BOOK3E gets to select SYS_SUPPORTS_HUGETLBFS so simplify accordingly. Signed-off-by: Christophe Leroy <[email protected]> Signed-off-by: Michael Ellerman <[email protected]>
2019-05-03powerpc/64: only book3s/64 supports CONFIG_PPC_64K_PAGESChristophe Leroy9-72/+5
CONFIG_PPC_64K_PAGES cannot be selected by nohash/64. Signed-off-by: Christophe Leroy <[email protected]> Signed-off-by: Michael Ellerman <[email protected]>
2019-05-03powerpc/book3e: drop mmu_get_tsize()Christophe Leroy1-5/+0
This function is not used anymore, drop it. Fixes: b42279f0165c ("powerpc/mm/nohash: MM_SLICE is only used by book3s 64") Signed-off-by: Christophe Leroy <[email protected]> Signed-off-by: Michael Ellerman <[email protected]>
2019-05-03powerpc/mm: define subarch SLB_ADDR_LIMIT_DEFAULTChristophe Leroy5-9/+7
This patch defines a subarch specific SLB_ADDR_LIMIT_DEFAULT to remove the #ifdefs around the setup of mm->context.slb_addr_limit It also generalises the use of mm_ctx_set_slb_addr_limit() helper. Signed-off-by: Christophe Leroy <[email protected]> Reviewed-by: Aneesh Kumar K.V <[email protected]> Signed-off-by: Michael Ellerman <[email protected]>
2019-05-03powerpc/mm: define get_slice_psize() all the timeChristophe Leroy2-3/+6
get_slice_psize() can be defined regardless of CONFIG_PPC_MM_SLICES to avoid ifdefs Signed-off-by: Christophe Leroy <[email protected]> Reviewed-by: Aneesh Kumar K.V <[email protected]> Signed-off-by: Michael Ellerman <[email protected]>
2019-05-03powerpc/8xx: get rid of #ifdef CONFIG_HUGETLB_PAGE for slicesChristophe Leroy1-4/+1
The 8xx only selects CONFIG_PPC_MM_SLICES when CONFIG_HUGETLB_PAGE is set. Signed-off-by: Christophe Leroy <[email protected]> Signed-off-by: Michael Ellerman <[email protected]>
2019-05-03powerpc/mm: remove a couple of #ifdef CONFIG_PPC_64K_PAGES in mm/slice.cChristophe Leroy1-6/+4
This patch replaces a couple of #ifdef CONFIG_PPC_64K_PAGES by IS_ENABLED(CONFIG_PPC_64K_PAGES) to improve code maintainability. Signed-off-by: Christophe Leroy <[email protected]> Reviewed-by: Aneesh Kumar K.V <[email protected]> Signed-off-by: Michael Ellerman <[email protected]>
2019-05-03powerpc/mm: remove unnecessary #ifdef CONFIG_PPC64Christophe Leroy1-3/+1
For PPC32 that's a noop, gcc should be smart enough to ignore it. Signed-off-by: Christophe Leroy <[email protected]> Signed-off-by: Michael Ellerman <[email protected]>
2019-05-03powerpc/mm: get rid of mm_ctx_slice_mask_xxx()Christophe Leroy2-45/+4
Now that slice_mask_for_size() is in mmu.h, the mm_ctx_slice_mask_xxx() are not needed anymore, so drop them. Note that the 8xx ones where not used anyway. Signed-off-by: Christophe Leroy <[email protected]> Reviewed-by: Aneesh Kumar K.V <[email protected]> Signed-off-by: Michael Ellerman <[email protected]>
2019-05-03powerpc/mm: move slice_mask_for_size() into mmu.hChristophe Leroy3-47/+46
Move slice_mask_for_size() into subarch mmu.h Signed-off-by: Christophe Leroy <[email protected]> Reviewed-by: Aneesh Kumar K.V <[email protected]> [mpe: Retain the BUG_ON()s, rather than converting to VM_BUG_ON()] Signed-off-by: Michael Ellerman <[email protected]>
2019-05-03powerpc/mm: hand a context_t over to slice_mask_for_size() instead of mm_structChristophe Leroy1-17/+17
slice_mask_for_size() only uses mm->context, so hand directly a pointer to the context. This will help moving the function in subarch mmu.h in the next patch by avoiding having to include the definition of struct mm_struct Signed-off-by: Christophe Leroy <[email protected]> Reviewed-by: Aneesh Kumar K.V <[email protected]> Signed-off-by: Michael Ellerman <[email protected]>
2019-05-03powerpc/mm: no slice for nohash/64Christophe Leroy3-15/+5
Only nohash/32 and book3s/64 support mm slices. Signed-off-by: Christophe Leroy <[email protected]> Reviewed-by: Aneesh Kumar K.V <[email protected]> Signed-off-by: Michael Ellerman <[email protected]>
2019-05-03powerpc/mm: fix erroneous duplicate slb_addr_limit initChristophe Leroy1-6/+0
Commit 67fda38f0d68 ("powerpc/mm: Move slb_addr_linit to early_init_mmu") moved slb_addr_limit init out of setup_arch(). Commit 701101865f5d ("powerpc/mm: Reduce memory usage for mm_context_t for radix") brought it back into setup_arch() by error. This patch reverts that erroneous regress. Fixes: 701101865f5d ("powerpc/mm: Reduce memory usage for mm_context_t for radix") Signed-off-by: Christophe Leroy <[email protected]> Reviewed-by: Aneesh Kumar K.V <[email protected]> Signed-off-by: Michael Ellerman <[email protected]>
2019-05-03powerpc/mm: Move nohash specifics in subdirectory mm/nohashChristophe Leroy12-16/+19
Many files in arch/powerpc/mm are only for nohash. This patch creates a subdirectory for them. Signed-off-by: Christophe Leroy <[email protected]> [mpe: Shorten new filenames] Signed-off-by: Michael Ellerman <[email protected]>
2019-05-03powerpc/mm: Move book3s32 specifics in subdirectory mm/book3s64Christophe Leroy6-2/+4
Several files in arch/powerpc/mm are only for book3S32. This patch creates a subdirectory for them. Signed-off-by: Christophe Leroy <[email protected]> [mpe: Shorten new filenames] Signed-off-by: Michael Ellerman <[email protected]>
2019-05-03powerpc/mm: Move book3s64 specifics in subdirectory mm/book3s64Christophe Leroy22-90/+124
Many files in arch/powerpc/mm are only for book3S64. This patch creates a subdirectory for them. Signed-off-by: Christophe Leroy <[email protected]> [mpe: Update the selftest sym links, shorten new filenames, cleanup some whitespace and formatting in the new files.] Signed-off-by: Michael Ellerman <[email protected]>
2019-05-02s390: simplify disabled_waitMartin Schwidefsky8-12/+12
The disabled_wait() function uses its argument as the PSW address when it stops the CPU with a wait PSW that is disabled for interrupts. The different callers sometimes use a specific number like 0xdeadbeef to indicate a specific failure, the early boot code uses 0 and some other calls sites use __builtin_return_address(0). At the time a dump is created the current PSW and the registers of a CPU are written to lowcore to make them avaiable to the dump analysis tool. For a CPU stopped with disabled_wait the PSW and the registers do not really make sense together, the PSW address does not point to the function the registers belong to. Simplify disabled_wait() by using _THIS_IP_ for the PSW address and drop the argument to the function. Signed-off-by: Martin Schwidefsky <[email protected]>
2019-05-02s390/ftrace: use HAVE_FUNCTION_GRAPH_RET_ADDR_PTRMartin Schwidefsky5-8/+11
Make the call chain more reliable by tagging the ftrace stack entries with the stack pointer that is associated with the return address. Signed-off-by: Martin Schwidefsky <[email protected]>
2019-05-02s390/unwind: introduce stack unwind APIMartin Schwidefsky16-205/+521
Rework the dump_trace() stack unwinder interface to support different unwinding algorithms. The new interface looks like this: struct unwind_state state; unwind_for_each_frame(&state, task, regs, start_stack) do_something(state.sp, state.ip, state.reliable); The unwind_bc.c file contains the implementation for the classic back-chain unwinder. One positive side effect of the new code is it now handles ftraced functions gracefully. It prints the real name of the return function instead of 'return_to_handler'. Signed-off-by: Martin Schwidefsky <[email protected]>
2019-05-02s390/opcodes: add missing instructions to the disassemblerMartin Schwidefsky1-0/+11
Signed-off-by: Martin Schwidefsky <[email protected]>
2019-05-02s390/bug: add entry size to the __bug_table sectionMartin Schwidefsky1-12/+12
Change the __EMIT_BUG inline assembly to emit mergeable __bug_table entries with type @progbits and specify the size of each entry. The entry size is encoded sh_entsize field of the section definition, it allows to identify which struct bug_entry to use to decode the entries. This will be needed for the objtool support. Signed-off-by: Martin Schwidefsky <[email protected]>
2019-05-02s390: use proper expoline sections for .dma codeMartin Schwidefsky1-4/+15
The text_dma.S code uses its own macro to generate an inline version of an expoline. To make it easier to identify all expolines in the kernel use a thunk and a branch to the thunk just like the rest of the kernel code does it. The name of the text_dma.S expoline thunk is __dma__s390_indirect_jump_r14 and the section is named .dma.text.__s390_indirect_jump_r14. This will be needed for the objtool support. Signed-off-by: Martin Schwidefsky <[email protected]>
2019-05-02s390/nospec: rename assembler generated expoline thunksMartin Schwidefsky1-5/+5
The assembler version of the expoline thunk use the naming __s390x_indirect_jump_rxuse_ry while the compiler generates names like __s390_indirect_jump_rx_use_ry. Make the naming more consistent. Signed-off-by: Martin Schwidefsky <[email protected]>
2019-05-02s390: add missing ENDPROC statements to assembler functionsMartin Schwidefsky10-6/+47
The assembler code in arch/s390 misses proper ENDPROC statements to properly end functions in a few places. Add them. Signed-off-by: Martin Schwidefsky <[email protected]>
2019-05-02powerpc/mm: change #include "mmu_decl.h" to <mm/mmu_decl.h>Christophe Leroy17-17/+17
This patch make inclusion of mmu_decl.h independant of the location of the file including it. Signed-off-by: Christophe Leroy <[email protected]> Signed-off-by: Michael Ellerman <[email protected]>
2019-05-02powerpc/nohash64: clean pgtable.hChristophe Leroy1-5/+0
TRANSPARENT_HUGEPAGE is only supported by book3s VMEMMAP_REGION_ID is never used Signed-off-by: Christophe Leroy <[email protected]> Signed-off-by: Michael Ellerman <[email protected]>
2019-05-02powerpc/book3e: drop BUG_ON() in map_kernel_page()Christophe Leroy1-3/+0
early_alloc_pgtable() never returns NULL as it panics on failure. This patch drops the three BUG_ON() which check the non nullity of early_alloc_pgtable() returned value. Signed-off-by: Christophe Leroy <[email protected]> Signed-off-by: Michael Ellerman <[email protected]>
2019-05-02powerpc/32s: Fix BATs setting with CONFIG_STRICT_KERNEL_RWXChristophe Leroy1-4/+14
Serge reported some crashes with CONFIG_STRICT_KERNEL_RWX enabled on a book3s32 machine. Analysis shows two issues: - BATs addresses and sizes are not properly aligned. - There is a gap between the last address covered by BATs and the first address covered by pages. Memory mapped with DBATs: 0: 0xc0000000-0xc07fffff 0x00000000 Kernel RO coherent 1: 0xc0800000-0xc0bfffff 0x00800000 Kernel RO coherent 2: 0xc0c00000-0xc13fffff 0x00c00000 Kernel RW coherent 3: 0xc1400000-0xc23fffff 0x01400000 Kernel RW coherent 4: 0xc2400000-0xc43fffff 0x02400000 Kernel RW coherent 5: 0xc4400000-0xc83fffff 0x04400000 Kernel RW coherent 6: 0xc8400000-0xd03fffff 0x08400000 Kernel RW coherent 7: 0xd0400000-0xe03fffff 0x10400000 Kernel RW coherent Memory mapped with pages: 0xe1000000-0xefffffff 0x21000000 240M rw present dirty accessed This patch fixes both issues. With the patch, we get the following which is as expected: Memory mapped with DBATs: 0: 0xc0000000-0xc07fffff 0x00000000 Kernel RO coherent 1: 0xc0800000-0xc0bfffff 0x00800000 Kernel RO coherent 2: 0xc0c00000-0xc0ffffff 0x00c00000 Kernel RW coherent 3: 0xc1000000-0xc1ffffff 0x01000000 Kernel RW coherent 4: 0xc2000000-0xc3ffffff 0x02000000 Kernel RW coherent 5: 0xc4000000-0xc7ffffff 0x04000000 Kernel RW coherent 6: 0xc8000000-0xcfffffff 0x08000000 Kernel RW coherent 7: 0xd0000000-0xdfffffff 0x10000000 Kernel RW coherent Memory mapped with pages: 0xe0000000-0xefffffff 0x20000000 256M rw present dirty accessed Fixes: 63b2bc619565 ("powerpc/mm/32s: Use BATs for STRICT_KERNEL_RWX") Reported-by: Serge Belyshev <[email protected]> Acked-by: Segher Boessenkool <[email protected]> Signed-off-by: Christophe Leroy <[email protected]> Signed-off-by: Michael Ellerman <[email protected]>
2019-05-01spufs: switch to ->free_inode()Al Viro1-8/+2
Signed-off-by: Al Viro <[email protected]>
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