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sandbox: vm: add function to iterate though pages in a hugepage

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This commit is contained in:
max 🍓
2023-02-01 17:04:20 +00:00
parent f82ca449b3
commit ca92093c10
2 changed files with 14 additions and 0 deletions
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4
sandbox/vm/include/socks/vm.h
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@@ -19,6 +19,9 @@
#define VM_PAGE_IS_RESERVED(pg) ((pg)->p_flags & VM_PAGE_RESERVED) #define VM_PAGE_IS_RESERVED(pg) ((pg)->p_flags & VM_PAGE_RESERVED)
#define vm_page_foreach(pg, i) \
for (vm_page_t *i = (pg); i; i = vm_page_get_next_tail(i))
typedef phys_addr_t vm_alignment_t; typedef phys_addr_t vm_alignment_t;
typedef unsigned int vm_node_id_t; typedef unsigned int vm_node_id_t;
@@ -138,6 +141,7 @@ extern void vm_page_free(vm_page_t *pg);
extern int vm_page_split(vm_page_t *pg, vm_page_t **a, vm_page_t **b); extern int vm_page_split(vm_page_t *pg, vm_page_t **a, vm_page_t **b);
extern vm_page_t *vm_page_merge(vm_page_t *a, vm_page_t *b); extern vm_page_t *vm_page_merge(vm_page_t *a, vm_page_t *b);
extern vm_page_t *vm_page_get_buddy(vm_page_t *pg); extern vm_page_t *vm_page_get_buddy(vm_page_t *pg);
extern vm_page_t *vm_page_get_next_tail(vm_page_t *pg);
extern size_t vm_bytes_to_pages(size_t bytes); extern size_t vm_bytes_to_pages(size_t bytes);

10
sandbox/vm/page.c
View File

@@ -260,3 +260,13 @@ vm_page_t *vm_page_get_buddy(vm_page_t *pg)
paddr = paddr ^ vm_page_order_to_bytes(pg->p_order); paddr = paddr ^ vm_page_order_to_bytes(pg->p_order);
return vm_page_get(paddr); return vm_page_get(paddr);
} }
vm_page_t *vm_page_get_next_tail(vm_page_t *pg)
{
vm_page_t *next = pg + 1;
if (next->p_flags & VM_PAGE_HEAD || !(next->p_flags & VM_PAGE_HUGE)) {
return NULL;
}
return next;
}