1 /* SPDX-License-Identifier: GPL-2.0-only */
2 #ifndef __KVM_HYP_GFP_H
3 #define __KVM_HYP_GFP_H
4
5 #include <linux/list.h>
6
7 #include <nvhe/memory.h>
8 #include <nvhe/spinlock.h>
9
10 #define HYP_NO_ORDER USHRT_MAX
11
12 struct hyp_pool {
13 /*
14 * Spinlock protecting concurrent changes to the memory pool as well as
15 * the struct hyp_page of the pool's pages until we have a proper atomic
16 * API at EL2.
17 */
18 hyp_spinlock_t lock;
19 struct list_head free_area[NR_PAGE_ORDERS];
20 phys_addr_t range_start;
21 phys_addr_t range_end;
22 unsigned short max_order;
23 };
24
25 /* Allocation */
26 void *hyp_alloc_pages(struct hyp_pool *pool, unsigned short order);
27 void hyp_split_page(struct hyp_page *page);
28 void hyp_get_page(struct hyp_pool *pool, void *addr);
29 void hyp_put_page(struct hyp_pool *pool, void *addr);
30
31 /* Used pages cannot be freed */
32 int hyp_pool_init(struct hyp_pool *pool, u64 pfn, unsigned int nr_pages,
33 unsigned int reserved_pages);
34 #endif /* __KVM_HYP_GFP_H */
35
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