18e17c662SQuentin Perret /* SPDX-License-Identifier: GPL-2.0-only */ 28e17c662SQuentin Perret #ifndef __KVM_HYP_GFP_H 38e17c662SQuentin Perret #define __KVM_HYP_GFP_H 48e17c662SQuentin Perret 58e17c662SQuentin Perret #include <linux/list.h> 68e17c662SQuentin Perret 78e17c662SQuentin Perret #include <nvhe/memory.h> 88e17c662SQuentin Perret #include <nvhe/spinlock.h> 98e17c662SQuentin Perret 1087ec0606SQuentin Perret #define HYP_NO_ORDER USHRT_MAX 118e17c662SQuentin Perret 128e17c662SQuentin Perret struct hyp_pool { 138e17c662SQuentin Perret /* 148e17c662SQuentin Perret * Spinlock protecting concurrent changes to the memory pool as well as 158e17c662SQuentin Perret * the struct hyp_page of the pool's pages until we have a proper atomic 168e17c662SQuentin Perret * API at EL2. 178e17c662SQuentin Perret */ 188e17c662SQuentin Perret hyp_spinlock_t lock; 19ded1ffeaSKirill A. Shutemov struct list_head free_area[NR_PAGE_ORDERS]; 208e17c662SQuentin Perret phys_addr_t range_start; 218e17c662SQuentin Perret phys_addr_t range_end; 2287ec0606SQuentin Perret unsigned short max_order; 238e17c662SQuentin Perret }; 248e17c662SQuentin Perret 258e17c662SQuentin Perret /* Allocation */ 2687ec0606SQuentin Perret void *hyp_alloc_pages(struct hyp_pool *pool, unsigned short order); 271d58a17eSQuentin Perret void hyp_split_page(struct hyp_page *page); 28d978b9cfSQuentin Perret void hyp_get_page(struct hyp_pool *pool, void *addr); 29d978b9cfSQuentin Perret void hyp_put_page(struct hyp_pool *pool, void *addr); 308e17c662SQuentin Perret 318e17c662SQuentin Perret /* Used pages cannot be freed */ 328e17c662SQuentin Perret int hyp_pool_init(struct hyp_pool *pool, u64 pfn, unsigned int nr_pages, 338e17c662SQuentin Perret unsigned int reserved_pages); 348e17c662SQuentin Perret #endif /* __KVM_HYP_GFP_H */ 35