linux/arch/x86/kernel/cpu/sgx/encl.h

/* SPDX-License-Identifier: GPL-2.0 */
/**
 * Copyright(c) 2016-20 Intel Corporation.
 *
 * Contains the software defined data structures for enclaves.
 */
#ifndef _X86_ENCL_H
#define _X86_ENCL_H

#include <linux/cpumask.h>
#include <linux/kref.h>
#include <linux/list.h>
#include <linux/mm_types.h>
#include <linux/mmu_notifier.h>
#include <linux/mutex.h>
#include <linux/notifier.h>
#include <linux/srcu.h>
#include <linux/workqueue.h>
#include <linux/xarray.h>
#include "sgx.h"

/* 'desc' bits holding the offset in the VA (version array) page. */
#define SGX_ENCL_PAGE_VA_OFFSET_MASK …

/* 'desc' bit marking that the page is being reclaimed. */
#define SGX_ENCL_PAGE_BEING_RECLAIMED …

struct sgx_encl_page { … };

enum sgx_encl_flags { … };

struct sgx_encl_mm { … };

struct sgx_encl { … };

#define SGX_VA_SLOT_COUNT …

struct sgx_va_page { … };

struct sgx_backing { … };

extern const struct vm_operations_struct sgx_vm_ops;

static inline int sgx_encl_find(struct mm_struct *mm, unsigned long addr,
				struct vm_area_struct **vma)
{ … }

int sgx_encl_may_map(struct sgx_encl *encl, unsigned long start,
		     unsigned long end, unsigned long vm_flags);

bool current_is_ksgxd(void);
void sgx_encl_release(struct kref *ref);
int sgx_encl_mm_add(struct sgx_encl *encl, struct mm_struct *mm);
const cpumask_t *sgx_encl_cpumask(struct sgx_encl *encl);
int sgx_encl_alloc_backing(struct sgx_encl *encl, unsigned long page_index,
			   struct sgx_backing *backing);
void sgx_encl_put_backing(struct sgx_backing *backing);
int sgx_encl_test_and_clear_young(struct mm_struct *mm,
				  struct sgx_encl_page *page);
struct sgx_encl_page *sgx_encl_page_alloc(struct sgx_encl *encl,
					  unsigned long offset,
					  u64 secinfo_flags);
void sgx_zap_enclave_ptes(struct sgx_encl *encl, unsigned long addr);
struct sgx_epc_page *sgx_alloc_va_page(bool reclaim);
unsigned int sgx_alloc_va_slot(struct sgx_va_page *va_page);
void sgx_free_va_slot(struct sgx_va_page *va_page, unsigned int offset);
bool sgx_va_page_full(struct sgx_va_page *va_page);
void sgx_encl_free_epc_page(struct sgx_epc_page *page);
struct sgx_encl_page *sgx_encl_load_page(struct sgx_encl *encl,
					 unsigned long addr);
struct sgx_va_page *sgx_encl_grow(struct sgx_encl *encl, bool reclaim);
void sgx_encl_shrink(struct sgx_encl *encl, struct sgx_va_page *va_page);

#endif /* _X86_ENCL_H */