diff options
Diffstat (limited to 'arch/arm64/kvm/hyp/include/nvhe/gfp.h')
-rw-r--r-- | arch/arm64/kvm/hyp/include/nvhe/gfp.h | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/arch/arm64/kvm/hyp/include/nvhe/gfp.h b/arch/arm64/kvm/hyp/include/nvhe/gfp.h new file mode 100644 index 0000000000..fe5472a184 --- /dev/null +++ b/arch/arm64/kvm/hyp/include/nvhe/gfp.h @@ -0,0 +1,34 @@ +/* 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 */ |