linux-headers/arch/e2k/include/asm/pv_info.h

121 lines
4.5 KiB
C

/*
* Copyright (c) 2016 MCST, Salavat Gilyazov atic@mcst.ru
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#ifndef __ASM_E2K_PV_INFO_H
#define __ASM_E2K_PV_INFO_H
#include <linux/types.h>
/*
* e2k kernel general info
*/
/*
* Even 32-bit applications must have big TASK_SIZE since hardware
* stacks are placed behind the 4Gb boundary.
*/
/* Virtual space is splitted into two parts: user and kernel spaces. */
/* Kernel virtual space takes high area and starts from the following base */
#define NATIVE_KERNEL_VIRTUAL_SPACE_BASE 0x0000d00000000000
/* direct mapping of all physical memory starts now from kernel virtual */
/* space beginning, but cannot map all possible 2**48 bytes */
#define NATIVE_PAGE_OFFSET NATIVE_KERNEL_VIRTUAL_SPACE_BASE
/* Users virtual spaces take low area from 0 right up to kernel base */
#define NATIVE_TASK_SIZE NATIVE_KERNEL_VIRTUAL_SPACE_BASE
#ifdef CONFIG_MMU_SEP_VIRT_SPACE
/* Users Separate Page Tables virtual base at the top of user space */
/* 0x0000 cf80 0000 0000 */
#define USER_VPTB_BASE_SIZE PGDIR_SIZE
#define USER_VPTB_BASE_ADDR (NATIVE_TASK_SIZE - USER_VPTB_BASE_SIZE)
#else /* ! CONFIG_MMU_SEP_VIRT_SPACE */
#define USER_VPTB_BASE_SIZE 0
#define USER_VPTB_BASE_ADDR KERNEL_VPTB_BASE_ADDR
#endif /* CONFIG_MMU_SEP_VIRT_SPACE */
/* virtualization support */
#include <asm/kvm/page.h>
#ifndef CONFIG_VIRTUALIZATION
/* it is native kernel without any virtualization */
#define IS_HOST_KERNEL_ADDRESS(addr) ((addr) >= NATIVE_TASK_SIZE)
#define IS_HOST_USER_ADDRESS(addr) ((addr) < NATIVE_TASK_SIZE)
#define IS_GUEST_KERNEL_ADDRESS(addr) false
#define IS_GUEST_USER_ADDRESS(addr) false
#define IS_GUEST_PHYS_ADDRESS(addr) false
#else /* CONFIG_VIRTUALIZATION */
/* it is host kernel with virtualization support */
/* or paravirtualized host and guest kernel */
/* or pure guest kernel (not paravirtualized based on pv_ops) */
#define HOST_TASK_SIZE (HOST_PAGE_OFFSET)
#define GUEST_TASK_SIZE (GUEST_PAGE_OFFSET)
#define HOST_TASK_TOP HOST_TASK_SIZE
#define GUEST_TASK_TOP GUEST_TASK_SIZE
#define BOOT_HOST_TASK_SIZE HOST_TASK_SIZE
#define BOOT_GUEST_TASK_SIZE GUEST_TASK_SIZE
#define IS_HOST_KERNEL_ADDRESS(addr) ((addr) >= HOST_TASK_SIZE)
#define IS_HOST_USER_ADDRESS(addr) ((addr) < HOST_TASK_SIZE)
#define IS_GUEST_KERNEL_ADDRESS(addr) ((addr) >= GUEST_TASK_SIZE && \
(addr) < HOST_TASK_SIZE)
#define IS_GUEST_USER_ADDRESS(addr) ((addr) < GUEST_TASK_SIZE)
#define IS_GUEST_PHYS_ADDRESS(addr) \
((e2k_addr_t)(addr) >= GUEST_PAGE_OFFSET && \
(e2k_addr_t)(addr) < GUEST_PAGE_OFFSET + MAX_PM_SIZE)
#endif /* ! CONFIG_VIRTUALIZATION */
#ifdef CONFIG_PARAVIRT_GUEST
/* it is paravirtualized host and guest kernel */
#define is_paravirt_kernel() true /* it is paravirtualized */
/* host and guest kernel */
#include <asm/paravirt/pv_info.h>
#elif defined(CONFIG_KVM_GUEST_KERNEL)
/* pure guest kernel (not paravirtualized) */
#define is_paravirt_kernel() false
#include <asm/kvm/guest/pv_info.h>
#else /* ! CONFIG_PARAVIRT_GUEST && ! CONFIG_KVM_GUEST_KERNEL */
/* it is native kernel without virtualization support */
/* or host kernel with virtualization support */
#define TASK_SIZE NATIVE_TASK_SIZE
#define paravirt_enabled() (IS_HV_GM() || false)
#define boot_paravirt_enabled() (BOOT_IS_HV_GM() || false)
#define is_paravirt_kernel() false
#ifndef CONFIG_VIRTUALIZATION
/* it is native kernel without virtualization support */
#define KERNEL_VIRTUAL_SPACE_BASE NATIVE_KERNEL_VIRTUAL_SPACE_BASE
#define PAGE_OFFSET NATIVE_PAGE_OFFSET
#define VMALLOC_START NATIVE_VMALLOC_START
#define VMALLOC_END NATIVE_VMALLOC_END
#define VMEMMAP_START NATIVE_VMEMMAP_START
#define VMEMMAP_END NATIVE_VMEMMAP_END
#define BOOT_KERNEL_VIRTUAL_SPACE_BASE KERNEL_VIRTUAL_SPACE_BASE
#define BOOT_PAGE_OFFSET PAGE_OFFSET
#define BOOT_TASK_SIZE TASK_SIZE
#endif /* ! CONFIG_VIRTUALIZATION */
#endif /* CONFIG_PARAVIRT_GUEST */
#endif /* __ASM_E2K_PV_INFO_H */