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/* SPDX-License-Identifier: GPL-2.0-only */
/*
* asm-x86/pv/mm.h
*
* Memory management interfaces for PV guests
*
* Copyright (C) 2017 Wei Liu <wei.liu2@citrix.com>
*/
#ifndef __X86_PV_MM_H__
#define __X86_PV_MM_H__
#ifdef CONFIG_PV
int pv_ro_page_fault(unsigned long addr, struct cpu_user_regs *regs);
int pv_set_gdt(struct vcpu *v, const unsigned long frames[],
unsigned int entries);
void pv_destroy_gdt(struct vcpu *v);
bool pv_map_ldt_shadow_page(unsigned int off);
bool pv_destroy_ldt(struct vcpu *v);
int validate_segdesc_page(struct page_info *page);
#else
#include <xen/errno.h>
#include <xen/lib.h>
static inline int pv_ro_page_fault(unsigned long addr,
struct cpu_user_regs *regs)
{
ASSERT_UNREACHABLE();
return 0;
}
static inline int pv_set_gdt(struct vcpu *v, const unsigned long frames[],
unsigned int entries)
{ ASSERT_UNREACHABLE(); return -EINVAL; }
static inline void pv_destroy_gdt(struct vcpu *v) { ASSERT_UNREACHABLE(); }
static inline bool pv_map_ldt_shadow_page(unsigned int off) { return false; }
static inline bool pv_destroy_ldt(struct vcpu *v)
{ ASSERT_UNREACHABLE(); return false; }
#endif
#endif /* __X86_PV_MM_H__ */
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