blob: fe5472a184a37d83c5dde7c14c92e559e3d92f3b [file] [log] [blame]
/* SPDX-License-Identifier: GPL-2.0-only */
#ifndef __KVM_HYP_GFP_H
#define __KVM_HYP_GFP_H
#include <linux/list.h>
#include <nvhe/memory.h>
#include <nvhe/spinlock.h>
#define HYP_NO_ORDER USHRT_MAX
struct hyp_pool {
/*
* Spinlock protecting concurrent changes to the memory pool as well as
* the struct hyp_page of the pool's pages until we have a proper atomic
* API at EL2.
*/
hyp_spinlock_t lock;
struct list_head free_area[MAX_ORDER + 1];
phys_addr_t range_start;
phys_addr_t range_end;
unsigned short max_order;
};
/* Allocation */
void *hyp_alloc_pages(struct hyp_pool *pool, unsigned short order);
void hyp_split_page(struct hyp_page *page);
void hyp_get_page(struct hyp_pool *pool, void *addr);
void hyp_put_page(struct hyp_pool *pool, void *addr);
/* Used pages cannot be freed */
int hyp_pool_init(struct hyp_pool *pool, u64 pfn, unsigned int nr_pages,
unsigned int reserved_pages);
#endif /* __KVM_HYP_GFP_H */