On 2023/12/4 17:17, Wang Wensheng wrote:
ascend inclusion category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/I8LNGH
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Add hugetlb_insert_hugepage_pte[_by_pa] to insert hugepages into process page table. The by_pa version performs like remap_pfn_range() that make the pte special and can be used for reserved physical memory.
Signed-off-by: Wang Wensheng <wangwensheng4@huawei.com> --- include/linux/hugetlb.h | 32 +++++++++++++++++++ mm/Kconfig | 15 +++++++++ mm/hugetlb.c | 70 +++++++++++++++++++++++++++++++++++++++++ 3 files changed, 117 insertions(+)
diff --git a/include/linux/hugetlb.h b/include/linux/hugetlb.h index 47d25a5e1933..57c2630cb80d 100644 --- a/include/linux/hugetlb.h +++ b/include/linux/hugetlb.h @@ -282,6 +282,26 @@ long hugetlb_change_protection(struct vm_area_struct *vma, bool is_hugetlb_entry_migration(pte_t pte); void hugetlb_unshare_all_pmds(struct vm_area_struct *vma);
+#ifdef CONFIG_HUGETLB_INSERT_PAGE +int hugetlb_insert_hugepage_pte(struct mm_struct *mm, unsigned long addr, + pgprot_t prot, struct page *hpage); +int hugetlb_insert_hugepage_pte_by_pa(struct mm_struct *mm, + unsigned long vir_addr, + pgprot_t prot, unsigned long phy_addr); +#else /* CONFIG_HUGETLB_INSERT_PAGE */ +static inline int hugetlb_insert_hugepage_pte(struct mm_struct *mm, unsigned long addr, + pgprot_t prot, struct page *hpage) +{ + return -EPERM; +} +static inline int hugetlb_insert_hugepage_pte_by_pa(struct mm_struct *mm, + unsigned long vir_addr, + pgprot_t prot, unsigned long phy_addr) +{ + return -EPERM; +} +#endif /* CONFIG_HUGETLB_INSERT_PAGE */ + #else /* !CONFIG_HUGETLB_PAGE */
static inline void hugetlb_dup_vma_private(struct vm_area_struct *vma) @@ -491,6 +511,18 @@ static inline vm_fault_t hugetlb_fault(struct mm_struct *mm,
static inline void hugetlb_unshare_all_pmds(struct vm_area_struct *vma) { }
+static inline int hugetlb_insert_hugepage_pte(struct mm_struct *mm, unsigned long addr, + pgprot_t prot, struct page *hpage) +{ + return -EPERM; +} +static inline int hugetlb_insert_hugepage_pte_by_pa(struct mm_struct *mm, + unsigned long vir_addr, + pgprot_t prot, unsigned long phy_addr) +{ + return -EPERM; +} + #endif /* !CONFIG_HUGETLB_PAGE */ /* * hugepages at page global directory. If arch support diff --git a/mm/Kconfig b/mm/Kconfig index ece4f2847e2b..3dead7328cd5 100644 --- a/mm/Kconfig +++ b/mm/Kconfig @@ -1269,6 +1269,21 @@ config LOCK_MM_AND_FIND_VMA bool depends on !STACK_GROWSUP
+menuconfig ASCEND_FEATURES + bool "Support Ascend Features" + depends on ARM64 + select HUGETLB_INSERT_PAGE + help + The Ascend chip use the Hisilicon DaVinci architecture, and mainly + focus on AI and machine leanring area, contains many external features. + Enable this config to enable selective list of these features. + If unsure, say N + +config HUGETLB_INSERT_PAGE + bool + help + This allowed a driver to insert hugetlb mapping into user address space. +
endmenu ?