kernel/arch/powerpc/include/asm/pgalloc-64.h, branch linux-rolling-stable

powerpc/mm: Copy pgalloc (part 2)

2016-05-11T11:53:49Z

This moves the nohash variant of pgalloc headers to nohash/ directory Signed-off-by: Aneesh Kumar K.V Signed-off-by: Michael Ellerman

powerpc/mm: Switch book3s 64 with 64K page size to 4 level page table

2016-03-03T10:18:28Z

This is needed so that we can support both hash and radix page table using single kernel. Radix kernel uses a 4 level table. We now use physical address in upper page table tree levels. Even though they are aligned to their size, for the masked bits we use the bit positions as per PowerISA 3.0. Signed-off-by: Aneesh Kumar K.V Signed-off-by: Michael Ellerman

powerpc/mm/book3s-64: Use physical addresses in upper page table tree levels

2016-02-29T09:34:34Z

This changes the Linux page tables to store physical addresses rather than kernel virtual addresses in the upper levels of the tree (pgd, pud and pmd) for 64-bit Book 3S machines. This also changes the hugepd pointers used to implement hugepages when the base page size is 4k to store physical addresses rather than virtual addresses (again just for 64-bit Book3S machines). This frees up some high order bits, and will be needed with PowerISA v3.0 machines which read the page table tree in hardware in radix mode. Signed-off-by: Paul Mackerras Signed-off-by: Michael Ellerman

powerpc/mm: Don't hardcode page table size

2015-12-14T04:19:15Z

pte and pmd table size are dependent on config items. Don't hard code the same. This make sure we use the right value when masking pmd entries and also while checking pmd_bad Signed-off-by: Aneesh Kumar K.V Signed-off-by: Michael Ellerman

powerpc/mm: Don't use pmd_val, pud_val and pgd_val as lvalue

2015-12-14T04:19:07Z

We convert them static inline function here as we did with pte_val in the previous patch Acked-by: Scott Wood Signed-off-by: Aneesh Kumar K.V Signed-off-by: Michael Ellerman

powerpc: Fix PTE page address mismatch in pgtable ctor/dtor

2013-12-10T00:25:05Z

In pte_alloc_one(), pgtable_page_ctor() is passed an address that has not been converted by page_address() to the newly allocated PTE page. When the PTE is freed, __pte_free_tlb() calls pgtable_page_dtor() with an address to the PTE page that has been converted by page_address(). The mismatch in the PTE's page address causes pgtable_page_dtor() to access invalid memory, so resources for that PTE (such as the page lock) is not properly cleaned up. On PPC32, only SMP kernels are affected. On PPC64, only SMP kernels with 4K page size are affected. This bug was introduced by commit d614bb041209fd7cb5e4b35e11a7b2f6ee8f62b8 "powerpc: Move the pte free routines from common header". On a preempt-rt kernel, a spinlock is dynamically allocated for each PTE in pgtable_page_ctor(). When the PTE is freed, calling pgtable_page_dtor() with a mismatched page address causes a memory leak, as the pointer to the PTE's spinlock is bogus. On mainline, there isn't any immediately obvious symptoms, but the problem still exists here. Fixes: d614bb041209fd7c "powerpc: Move the pte free routes from common header" Cc: Paul Mackerras Cc: Aneesh Kumar K.V Cc: Benjamin Herrenschmidt Cc: linux-stable # v3.10+ Signed-off-by: Hong H. Pham Reviewed-by: Aneesh Kumar K.V Signed-off-by: Benjamin Herrenschmidt

powerpc/kdump: Adding symbols in vmcoreinfo to facilitate dump filtering

2013-11-25T00:50:12Z

When CONFIG_SPARSEMEM_VMEMMAP option is used in kernel, makedumpfile fails to filter vmcore dump as it fails to do vmemmap translations. So far dump filtering on ppc64 never had to deal with vmemmap addresses seperately as vmemmap regions where mapped in zone normal. But with the inclusion of CONFIG_SPARSEMEM_VMEMMAP config option in kernel, this vmemmap address translation support becomes necessary for dump filtering. For vmemmap adress translation, few kernel symbols are needed by dump filtering tool. This patch adds those symbols to vmcoreinfo, which a dump filtering tool can use for filtering the kernel dump. Tested this changes successfully with makedumpfile tool that supports vmemmap to physical address translation outside zone normal. [ Removed unneeded #ifdef as suggested by Michael Ellerman --BenH ] Signed-off-by: Hari Bathini Signed-off-by: Benjamin Herrenschmidt

powerpc: handle pgtable_page_ctor() fail

2013-11-15T00:32:18Z

Signed-off-by: Kirill A. Shutemov Cc: Benjamin Herrenschmidt Cc: Paul Mackerras Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

powerpc/THP: Double the PMD table size for THP

2013-06-21T06:01:53Z

THP code does PTE page allocation along with large page request and deposit them for later use. This is to ensure that we won't have any failures when we split hugepages to regular pages. On powerpc we want to use the deposited PTE page for storing hash pte slot and secondary bit information for the HPTEs. We use the second half of the pmd table to save the deposted PTE page. Reviewed-by: David Gibson Signed-off-by: Aneesh Kumar K.V Signed-off-by: Benjamin Herrenschmidt

powerpc/mm: Use the correct mask value when looking at pgtable address

2013-05-14T04:36:17Z

Our pgtable are 2*sizeof(pte_t)*PTRS_PER_PTE which is PTE_FRAG_SIZE. Instead of depending on frag size, mask with PMD_MASKED_BITS. Signed-off-by: Aneesh Kumar K.V Signed-off-by: Benjamin Herrenschmidt