From 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 Mon Sep 17 00:00:00 2001 From: Yunhong Jiang Date: Tue, 4 Aug 2015 12:17:53 -0700 Subject: Add the rt linux 4.1.3-rt3 as base Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang --- kernel/arch/tile/include/asm/pgalloc.h | 164 +++++++++++++++++++++++++++++++++ 1 file changed, 164 insertions(+) create mode 100644 kernel/arch/tile/include/asm/pgalloc.h (limited to 'kernel/arch/tile/include/asm/pgalloc.h') diff --git a/kernel/arch/tile/include/asm/pgalloc.h b/kernel/arch/tile/include/asm/pgalloc.h new file mode 100644 index 000000000..1b902508b --- /dev/null +++ b/kernel/arch/tile/include/asm/pgalloc.h @@ -0,0 +1,164 @@ +/* + * Copyright 2010 Tilera Corporation. All Rights Reserved. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation, version 2. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or + * NON INFRINGEMENT. See the GNU General Public License for + * more details. + */ + +#ifndef _ASM_TILE_PGALLOC_H +#define _ASM_TILE_PGALLOC_H + +#include +#include +#include +#include +#include +#include + +/* Bits for the size of the second-level page table. */ +#define L2_KERNEL_PGTABLE_SHIFT _HV_LOG2_L2_SIZE(HPAGE_SHIFT, PAGE_SHIFT) + +/* How big is a kernel L2 page table? */ +#define L2_KERNEL_PGTABLE_SIZE (1UL << L2_KERNEL_PGTABLE_SHIFT) + +/* We currently allocate user L2 page tables by page (unlike kernel L2s). */ +#if L2_KERNEL_PGTABLE_SHIFT < PAGE_SHIFT +#define L2_USER_PGTABLE_SHIFT PAGE_SHIFT +#else +#define L2_USER_PGTABLE_SHIFT L2_KERNEL_PGTABLE_SHIFT +#endif + +/* How many pages do we need, as an "order", for a user L2 page table? */ +#define L2_USER_PGTABLE_ORDER (L2_USER_PGTABLE_SHIFT - PAGE_SHIFT) + +static inline void set_pmd(pmd_t *pmdp, pmd_t pmd) +{ +#ifdef CONFIG_64BIT + set_pte(pmdp, pmd); +#else + set_pte(&pmdp->pud.pgd, pmd.pud.pgd); +#endif +} + +static inline void pmd_populate_kernel(struct mm_struct *mm, + pmd_t *pmd, pte_t *ptep) +{ + set_pmd(pmd, ptfn_pmd(HV_CPA_TO_PTFN(__pa(ptep)), + __pgprot(_PAGE_PRESENT))); +} + +static inline void pmd_populate(struct mm_struct *mm, pmd_t *pmd, + pgtable_t page) +{ + set_pmd(pmd, ptfn_pmd(HV_CPA_TO_PTFN(PFN_PHYS(page_to_pfn(page))), + __pgprot(_PAGE_PRESENT))); +} + +/* + * Allocate and free page tables. + */ + +extern pgd_t *pgd_alloc(struct mm_struct *mm); +extern void pgd_free(struct mm_struct *mm, pgd_t *pgd); + +extern pgtable_t pgtable_alloc_one(struct mm_struct *mm, unsigned long address, + int order); +extern void pgtable_free(struct mm_struct *mm, struct page *pte, int order); + +static inline pgtable_t pte_alloc_one(struct mm_struct *mm, + unsigned long address) +{ + return pgtable_alloc_one(mm, address, L2_USER_PGTABLE_ORDER); +} + +static inline void pte_free(struct mm_struct *mm, struct page *pte) +{ + pgtable_free(mm, pte, L2_USER_PGTABLE_ORDER); +} + +#define pmd_pgtable(pmd) pmd_page(pmd) + +static inline pte_t * +pte_alloc_one_kernel(struct mm_struct *mm, unsigned long address) +{ + return pfn_to_kaddr(page_to_pfn(pte_alloc_one(mm, address))); +} + +static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte) +{ + BUG_ON((unsigned long)pte & (PAGE_SIZE-1)); + pte_free(mm, virt_to_page(pte)); +} + +extern void __pgtable_free_tlb(struct mmu_gather *tlb, struct page *pte, + unsigned long address, int order); +static inline void __pte_free_tlb(struct mmu_gather *tlb, struct page *pte, + unsigned long address) +{ + __pgtable_free_tlb(tlb, pte, address, L2_USER_PGTABLE_ORDER); +} + +#define check_pgt_cache() do { } while (0) + +/* + * Get the small-page pte_t lowmem entry for a given pfn. + * This may or may not be in use, depending on whether the initial + * huge-page entry for the page has already been shattered. + */ +pte_t *get_prealloc_pte(unsigned long pfn); + +/* During init, we can shatter kernel huge pages if needed. */ +void shatter_pmd(pmd_t *pmd); + +/* After init, a more complex technique is required. */ +void shatter_huge_page(unsigned long addr); + +#ifdef __tilegx__ + +#define pud_populate(mm, pud, pmd) \ + pmd_populate_kernel((mm), (pmd_t *)(pud), (pte_t *)(pmd)) + +/* Bits for the size of the L1 (intermediate) page table. */ +#define L1_KERNEL_PGTABLE_SHIFT _HV_LOG2_L1_SIZE(HPAGE_SHIFT) + +/* How big is a kernel L2 page table? */ +#define L1_KERNEL_PGTABLE_SIZE (1UL << L1_KERNEL_PGTABLE_SHIFT) + +/* We currently allocate L1 page tables by page. */ +#if L1_KERNEL_PGTABLE_SHIFT < PAGE_SHIFT +#define L1_USER_PGTABLE_SHIFT PAGE_SHIFT +#else +#define L1_USER_PGTABLE_SHIFT L1_KERNEL_PGTABLE_SHIFT +#endif + +/* How many pages do we need, as an "order", for an L1 page table? */ +#define L1_USER_PGTABLE_ORDER (L1_USER_PGTABLE_SHIFT - PAGE_SHIFT) + +static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address) +{ + struct page *p = pgtable_alloc_one(mm, address, L1_USER_PGTABLE_ORDER); + return (pmd_t *)page_to_virt(p); +} + +static inline void pmd_free(struct mm_struct *mm, pmd_t *pmdp) +{ + pgtable_free(mm, virt_to_page(pmdp), L1_USER_PGTABLE_ORDER); +} + +static inline void __pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmdp, + unsigned long address) +{ + __pgtable_free_tlb(tlb, virt_to_page(pmdp), address, + L1_USER_PGTABLE_ORDER); +} + +#endif /* __tilegx__ */ + +#endif /* _ASM_TILE_PGALLOC_H */ -- cgit 1.2.3-korg