35 lines
943 B
C
35 lines
943 B
C
|
/* 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];
|
||
|
|
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 */
|