kernel.git/arch/powerpc/mm/slice.c, branch linux-4.10.y

powerpc/mm/radix: Add checks in slice code to catch radix usage

2016-05-11T11:53:46Z

Radix doesn't need slice support. Catch incorrect usage of slice code when radix is enabled. Signed-off-by: Aneesh Kumar K.V Signed-off-by: Michael Ellerman

powerpc/mm: Make page table size a variable

2016-05-01T08:32:48Z

Radix and hash MMU models support different page table sizes. Make the #defines a variable so that existing code can work with variable sizes. Slice related code is only used by hash, so use hash constants there. We will replicate some of the boundary conditions with resepct to TASK_SIZE using radix values too. Right now we do boundary condition check using hash constants. Swapper pgdir size is initialized in asm code. We select the max pgd size to keep it simple. For now we select hash pgdir. When adding radix we will switch that to radix pgdir which is 64K. BUILD_BUG_ON check which is removed is already done in hugepage_init() using MAYBE_BUILD_BUG_ON(). Signed-off-by: Aneesh Kumar K.V Signed-off-by: Michael Ellerman

powerpc: Add function to copy mm_context_t to the paca

2015-12-19T11:13:12Z

This adds a function to copy the mm->context to the paca. This is only a basic conversion for now but will be used more extensively in the next patch. This also adds #ifdef CONFIG_PPC_BOOK3S around this code since it's not used elsewhere. Signed-off-by: Michael Neuling Signed-off-by: Michael Ellerman

powerpc: Remove some unused functions

2015-01-28T04:00:24Z

Remove slice_set_psize() which is not used. It was added in 3a8247cc2c85 "powerpc: Only demote individual slices rather than whole process" but was never used. Remove vsx_assist_exception() which is not used. It was added in ce48b2100785 "powerpc: Add VSX context save/restore, ptrace and signal support" but was never used. Remove generic_mach_cpu_die() which is not used. Its last caller was removed in 375f561a4131 "powerpc/powernv: Always go into nap mode when CPU is offline". Remove mpc7448_hpc2_power_off() and mpc7448_hpc2_halt() which are unused. These were introduced in c5d56332fd6c "[POWERPC] Add general support for mpc7448hpc2 (Taiga) platform" but were never used. This was partially found by using a static code analysis program called cppcheck. Signed-off-by: Rickard Strandqvist [mpe: Update changelog with details on when/why they are unused] Signed-off-by: Michael Ellerman

powerpc/mm: Fix build error with hugetlfs disabled

2014-10-22T03:03:06Z

arch/powerpc/mm/slice.c:704:5: error: expected identifier or ‘(’ before numeric constant int is_hugepage_only_range(struct mm_struct *mm, unsigned long addr, ^ make[1]: *** [arch/powerpc/mm/slice.o] Error 1 make: *** [arch/powerpc/mm/slice.o] Error 2 This got introduced via 1217d34b531c76362217057ca70a8ce8950574e0 "powerpc: Ensure global functions include their prototype". We started including linux/hugetlb.h with that patch and now we have #define is_hugepage_only_range(mm, addr, len) 0 with hugetlbfs disabled. Fixes: 1217d34b531c ("powerpc: Ensure global functions include their prototype") Signed-off-by: Aneesh Kumar K.V Signed-off-by: Michael Ellerman

powerpc/cell: Make spu_flush_all_slbs() generic

2014-10-08T09:15:37Z

This moves spu_flush_all_slbs() into a generic call copro_flush_all_slbs(). This will be useful when we add cxl which also needs a similar SLB flush call. Signed-off-by: Ian Munsie Signed-off-by: Michael Neuling Signed-off-by: Michael Ellerman

powerpc: Ensure global functions include their prototype

2014-09-25T13:14:42Z

Fix a number of places where global functions were not including their prototype. This ensures the prototype and the function match. Signed-off-by: Anton Blanchard Signed-off-by: Michael Ellerman

powerpc/mm: Fix mmap errno when MAP_FIXED is set and mapping exceeds the allowed address space

2014-01-29T06:02:25Z

According to Posix, if MAP_FIXED is specified mmap shall set ENOMEM if the requested mapping exceeds the allowed range for address space of the process. The generic code set it right, but the specific powerpc slice_get_unmapped_area() function currently returns -EINVAL in that case. This patch corrects it. Signed-off-by: Jerome Marchand Signed-off-by: Benjamin Herrenschmidt

powerpc: ppc64 address space capped at 32TB, mmap randomisation disabled

2013-11-20T23:33:41Z

Commit fba2369e6ceb (mm: use vm_unmapped_area() on powerpc architecture) has a bug in slice_scan_available() where we compare an unsigned long (high_slices) against a shifted int. As a result, comparisons against the top 32 bits of high_slices (representing the top 32TB) always returns 0 and the top of our mmap region is clamped at 32TB This also breaks mmap randomisation since the randomised address is always up near the top of the address space and it gets clamped down to 32TB. Cc: stable@vger.kernel.org # v3.10+ Signed-off-by: Anton Blanchard Acked-by: Michel Lespinasse Signed-off-by: Benjamin Herrenschmidt

mm: use vm_unmapped_area() on powerpc architecture

2013-04-30T01:05:17Z

Update the powerpc slice_get_unmapped_area function to make use of vm_unmapped_area() instead of implementing a brute force search. Signed-off-by: Michel Lespinasse Cc: Benjamin Herrenschmidt Cc: Paul Mackerras Tested-by: "Aneesh Kumar K.V" Acked-by: David Gibson Signed-off-by: Andrew Morton Signed-off-by: Benjamin Herrenschmidt