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/* $Id: the-linux-kernel.h 133264 2019-09-11 09:56:19Z paulson $ */
/** @file
* IPRT - Include all necessary headers for the Linux kernel.
*/
/*
* Copyright (C) 2006-2019 Oracle Corporation
*
* This file is part of VirtualBox Open Source Edition (OSE), as
* available from http://www.virtualbox.org. This file is free software;
* you can redistribute it and/or modify it under the terms of the GNU
* General Public License (GPL) as published by the Free Software
* Foundation, in version 2 as it comes in the "COPYING" file of the
* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
*
* The contents of this file may alternatively be used under the terms
* of the Common Development and Distribution License Version 1.0
* (CDDL) only, as it comes in the "COPYING.CDDL" file of the
* VirtualBox OSE distribution, in which case the provisions of the
* CDDL are applicable instead of those of the GPL.
*
* You may elect to license modified versions of this file under the
* terms and conditions of either the GPL or the CDDL or both.
*/
#ifndef IPRT_INCLUDED_SRC_r0drv_linux_the_linux_kernel_h
#define IPRT_INCLUDED_SRC_r0drv_linux_the_linux_kernel_h
#ifndef RT_WITHOUT_PRAGMA_ONCE
# pragma once
#endif
/*
* Include iprt/types.h to install the bool wrappers.
* Then use the linux bool type for all the stuff include here.
*/
#include <iprt/types.h>
#define bool linux_bool
#if RT_GNUC_PREREQ(4, 6)
# pragma GCC diagnostic push
#endif
#if RT_GNUC_PREREQ(4, 2)
# pragma GCC diagnostic ignored "-Wunused-parameter"
# if !defined(__cplusplus) && RT_GNUC_PREREQ(4, 3)
# pragma GCC diagnostic ignored "-Wold-style-declaration" /* 2.6.18-411.0.0.0.1.el5/build/include/asm/apic.h:110: warning: 'inline' is not at beginning of declaration [-Wold-style-declaration] */
# endif
#endif
#include <linux/version.h>
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 33)
# include <generated/autoconf.h>
#else
# ifndef AUTOCONF_INCLUDED
# include <linux/autoconf.h>
# endif
#endif
/* We only support 2.4 and 2.6 series kernels */
#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 4, 0)
# error We only support 2.4 and 2.6 series kernels
#endif
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 5, 0) && LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 0)
# error We only support 2.4 and 2.6 series kernels
#endif
#if defined(CONFIG_MODVERSIONS) && !defined(MODVERSIONS)
# define MODVERSIONS
# if LINUX_VERSION_CODE < KERNEL_VERSION(2, 5, 71)
# include <linux/modversions.h>
# endif
#endif
#ifndef KBUILD_STR
# if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 16)
# define KBUILD_STR(s) s
# else
# define KBUILD_STR(s) #s
# endif
#endif
# if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 3, 0)
# include <linux/kconfig.h> /* for macro IS_ENABLED */
# endif
#include <linux/string.h>
#include <linux/spinlock.h>
#include <linux/slab.h>
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 27)
# include <linux/semaphore.h>
#else /* older kernels */
# include <asm/semaphore.h>
#endif /* older kernels */
#include <linux/module.h>
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 0)
# include <linux/moduleparam.h>
#endif
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/fs.h>
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 0)
# include <linux/namei.h>
#endif
#include <linux/mm.h>
#include <linux/pagemap.h>
#include <linux/slab.h>
#include <linux/time.h>
#include <linux/sched.h>
#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 9, 23) && \
LINUX_VERSION_CODE < KERNEL_VERSION(3, 9, 31)
#include <linux/splice.h>
#endif
#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 9, 0)
# include <linux/sched/rt.h>
#endif
#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 11, 0)
# include <linux/sched/signal.h>
# include <linux/sched/types.h>
#endif
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 7)
# include <linux/jiffies.h>
#endif
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 16)
# include <linux/ktime.h>
# include <linux/hrtimer.h>
#endif
#include <linux/wait.h>
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 5, 71)
# include <linux/cpu.h>
# include <linux/notifier.h>
#endif
#if LINUX_VERSION_CODE >= KERNEL_VERSION(5, 1, 0)
# include <uapi/linux/mman.h>
#endif
/* For the basic additions module */
#include <linux/pci.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/completion.h>
#include <linux/compiler.h>
#ifndef HAVE_UNLOCKED_IOCTL /* linux/fs.h defines this */
# include <linux/smp_lock.h>
#endif
/* For the shared folders module */
#include <linux/vmalloc.h>
#define wchar_t linux_wchar_t
#include <linux/nls.h>
#undef wchar_t
#include <asm/mman.h>
#include <asm/io.h>
#include <asm/uaccess.h>
#include <asm/div64.h>
/* For thread-context hooks. */
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 18) && defined(CONFIG_PREEMPT_NOTIFIERS)
# include <linux/preempt.h>
#endif
/* for workqueue / task queues. */
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 5, 41)
# include <linux/workqueue.h>
#else
# include <linux/tqueue.h>
#endif
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 4)
# include <linux/kthread.h>
#endif
/* for cr4_init_shadow() / cpu_tlbstate. */
#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 20, 0)
# include <asm/tlbflush.h>
#endif
/* for set_pages_x() */
#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 12, 0)
# include <asm/set_memory.h>
#endif
#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 7, 0)
# include <asm/smap.h>
#else
static inline void clac(void) { }
static inline void stac(void) { }
#endif
#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 0)
# ifndef page_to_pfn
# define page_to_pfn(page) ((page) - mem_map)
# endif
#endif
#ifndef DEFINE_WAIT
# define DEFINE_WAIT(name) DECLARE_WAITQUEUE(name, current)
#endif
#ifndef __GFP_NOWARN
# define __GFP_NOWARN 0
#endif
/*
* 2.4 / early 2.6 compatibility wrappers
*/
#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 7)
# ifndef MAX_JIFFY_OFFSET
# define MAX_JIFFY_OFFSET ((~0UL >> 1)-1)
# endif
# if LINUX_VERSION_CODE < KERNEL_VERSION(2, 4, 29) || LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 0)
DECLINLINE(unsigned int) jiffies_to_msecs(unsigned long cJiffies)
{
# if HZ <= 1000 && !(1000 % HZ)
return (1000 / HZ) * cJiffies;
# elif HZ > 1000 && !(HZ % 1000)
return (cJiffies + (HZ / 1000) - 1) / (HZ / 1000);
# else
return (cJiffies * 1000) / HZ;
# endif
}
DECLINLINE(unsigned long) msecs_to_jiffies(unsigned int cMillies)
{
# if HZ > 1000
if (cMillies > jiffies_to_msecs(MAX_JIFFY_OFFSET))
return MAX_JIFFY_OFFSET;
# endif
# if HZ <= 1000 && !(1000 % HZ)
return (cMillies + (1000 / HZ) - 1) / (1000 / HZ);
# elif HZ > 1000 && !(HZ % 1000)
return cMillies * (HZ / 1000);
# else
return (cMillies * HZ + 999) / 1000;
# endif
}
# endif /* < 2.4.29 || >= 2.6.0 */
#endif /* < 2.6.7 */
/*
* 2.4 compatibility wrappers
*/
#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 0)
# define prepare_to_wait(q, wait, state) \
do { \
add_wait_queue(q, wait); \
set_current_state(state); \
} while (0)
# define after_wait(wait) \
do { \
list_del_init(&(wait)->task_list); \
} while (0)
# define finish_wait(q, wait) \
do { \
set_current_state(TASK_RUNNING); \
remove_wait_queue(q, wait); \
} while (0)
#else /* >= 2.6.0 */
# define after_wait(wait) do {} while (0)
#endif /* >= 2.6.0 */
/** @def TICK_NSEC
* The time between ticks in nsec */
#ifndef TICK_NSEC
# define TICK_NSEC (1000000000UL / HZ)
#endif
/*
* This sucks soooo badly on x86! Why don't they export __PAGE_KERNEL_EXEC so PAGE_KERNEL_EXEC would be usable?
*/
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 8) && defined(RT_ARCH_AMD64)
# define MY_PAGE_KERNEL_EXEC PAGE_KERNEL_EXEC
#elif LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 8) && defined(PAGE_KERNEL_EXEC) && defined(CONFIG_X86_PAE)
# ifdef __PAGE_KERNEL_EXEC
/* >= 2.6.27 */
# define MY_PAGE_KERNEL_EXEC __pgprot(boot_cpu_has(X86_FEATURE_PGE) ? __PAGE_KERNEL_EXEC | _PAGE_GLOBAL : __PAGE_KERNEL_EXEC)
# else
# define MY_PAGE_KERNEL_EXEC __pgprot(boot_cpu_has(X86_FEATURE_PGE) ? _PAGE_KERNEL_EXEC | _PAGE_GLOBAL : _PAGE_KERNEL_EXEC)
# endif
#else
# define MY_PAGE_KERNEL_EXEC PAGE_KERNEL
#endif
/*
* The redhat hack section.
* - The current hacks are for 2.4.21-15.EL only.
*/
#ifndef NO_REDHAT_HACKS
/* accounting. */
# if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 0)
# ifdef VM_ACCOUNT
# define USE_RHEL4_MUNMAP
# endif
# endif
/* backported remap_page_range. */
# if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 0)
# include <asm/tlb.h>
# ifdef tlb_vma /* probably not good enough... */
# define HAVE_26_STYLE_REMAP_PAGE_RANGE 1
# endif
# endif
# ifndef RT_ARCH_AMD64
/* In 2.6.9-22.ELsmp we have to call change_page_attr() twice when changing
* the page attributes from PAGE_KERNEL to something else, because there appears
* to be a bug in one of the many patches that redhat applied.
* It should be safe to do this on less buggy linux kernels too. ;-)
*/
# define MY_CHANGE_PAGE_ATTR(pPages, cPages, prot) \
do { \
if (pgprot_val(prot) != pgprot_val(PAGE_KERNEL)) \
change_page_attr(pPages, cPages, prot); \
change_page_attr(pPages, cPages, prot); \
} while (0)
# endif /* !RT_ARCH_AMD64 */
#endif /* !NO_REDHAT_HACKS */
#ifndef MY_CHANGE_PAGE_ATTR
# ifdef RT_ARCH_AMD64 /** @todo This is a cheap hack, but it'll get around that 'else BUG();' in __change_page_attr(). */
# define MY_CHANGE_PAGE_ATTR(pPages, cPages, prot) \
do { \
change_page_attr(pPages, cPages, PAGE_KERNEL_NOCACHE); \
change_page_attr(pPages, cPages, prot); \
} while (0)
# else
# define MY_CHANGE_PAGE_ATTR(pPages, cPages, prot) change_page_attr(pPages, cPages, prot)
# endif
#endif
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 25)
# define MY_SET_PAGES_EXEC(pPages, cPages) set_pages_x(pPages, cPages)
# define MY_SET_PAGES_NOEXEC(pPages, cPages) set_pages_nx(pPages, cPages)
#else
# define MY_SET_PAGES_EXEC(pPages, cPages) \
do { \
if (pgprot_val(MY_PAGE_KERNEL_EXEC) != pgprot_val(PAGE_KERNEL)) \
MY_CHANGE_PAGE_ATTR(pPages, cPages, MY_PAGE_KERNEL_EXEC); \
} while (0)
# define MY_SET_PAGES_NOEXEC(pPages, cPages) \
do { \
if (pgprot_val(MY_PAGE_KERNEL_EXEC) != pgprot_val(PAGE_KERNEL)) \
MY_CHANGE_PAGE_ATTR(pPages, cPages, PAGE_KERNEL); \
} while (0)
#endif
/** @def ONE_MSEC_IN_JIFFIES
* The number of jiffies that make up 1 millisecond. Must be at least 1! */
#if HZ <= 1000
# define ONE_MSEC_IN_JIFFIES 1
#elif !(HZ % 1000)
# define ONE_MSEC_IN_JIFFIES (HZ / 1000)
#else
# define ONE_MSEC_IN_JIFFIES ((HZ + 999) / 1000)
# error "HZ is not a multiple of 1000, the GIP stuff won't work right!"
#endif
/*
* Stop using the linux bool type.
*/
#undef bool
#if RT_GNUC_PREREQ(4, 6)
# pragma GCC diagnostic pop
#endif
/*
* There are post-2.6.24 kernels (confusingly with unchanged version number)
* which eliminate macros which were marked as deprecated.
*/
#ifndef __attribute_used__
#define __attribute_used__ __used
#endif
/**
* Hack for shortening pointers on linux so we can stuff more stuff into the
* task_struct::comm field. This is used by the semaphore code but put here
* because we don't have any better place atm. Don't use outside IPRT, please.
*/
#ifdef RT_ARCH_AMD64
# define IPRT_DEBUG_SEMS_ADDRESS(addr) ( ((long)(addr) & (long)~UINT64_C(0xfffffff000000000)) )
#else
# define IPRT_DEBUG_SEMS_ADDRESS(addr) ( (long)(addr) )
#endif
/**
* Puts semaphore info into the task_struct::comm field if IPRT_DEBUG_SEMS is
* defined.
*/
#ifdef IPRT_DEBUG_SEMS
# define IPRT_DEBUG_SEMS_STATE(pThis, chState) \
snprintf(current->comm, sizeof(current->comm), "%c%lx", (chState), IPRT_DEBUG_SEMS_ADDRESS(pThis));
#else
# define IPRT_DEBUG_SEMS_STATE(pThis, chState) do { } while (0)
#endif
/**
* Puts semaphore info into the task_struct::comm field if IPRT_DEBUG_SEMS is
* defined.
*/
#ifdef IPRT_DEBUG_SEMS
# define IPRT_DEBUG_SEMS_STATE_RC(pThis, chState, rc) \
snprintf(current->comm, sizeof(current->comm), "%c%lx:%d", (chState), IPRT_DEBUG_SEMS_ADDRESS(pThis), rc);
#else
# define IPRT_DEBUG_SEMS_STATE_RC(pThis, chState, rc) do { } while (0)
#endif
/** @name Macros for preserving EFLAGS.AC on 3.19+/amd64 paranoid.
* The AMD 64 switch_to in macro in arch/x86/include/asm/switch_to.h stopped
* restoring flags.
* @{ */
#if defined(CONFIG_X86_SMAP) || defined(RT_STRICT) || defined(IPRT_WITH_EFLAGS_AC_PRESERVING)
# include <iprt/asm-amd64-x86.h>
# define IPRT_X86_EFL_AC RT_BIT(18)
# define IPRT_LINUX_SAVE_EFL_AC() RTCCUINTREG fSavedEfl = ASMGetFlags()
# define IPRT_LINUX_RESTORE_EFL_AC() ASMSetFlags(fSavedEfl)
# define IPRT_LINUX_RESTORE_EFL_ONLY_AC() ASMChangeFlags(~IPRT_X86_EFL_AC, fSavedEfl & IPRT_X86_EFL_AC)
#else
# define IPRT_LINUX_SAVE_EFL_AC() do { } while (0)
# define IPRT_LINUX_RESTORE_EFL_AC() do { } while (0)
# define IPRT_LINUX_RESTORE_EFL_ONLY_AC() do { } while (0)
#endif
/** @} */
/*
* There are some conflicting defines in iprt/param.h, sort them out here.
*/
#ifndef IPRT_INCLUDED_param_h
# undef PAGE_SIZE
# undef PAGE_OFFSET_MASK
# include <iprt/param.h>
#endif
/*
* Some global indicator macros.
*/
/** @def IPRT_LINUX_HAS_HRTIMER
* Whether the kernel support high resolution timers (Linux kernel versions
* 2.6.28 and later (hrtimer_add_expires_ns() & schedule_hrtimeout). */
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 28)
# define IPRT_LINUX_HAS_HRTIMER
#endif
/*
* Workqueue stuff, see initterm-r0drv-linux.c.
*/
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 5, 41)
typedef struct work_struct RTR0LNXWORKQUEUEITEM;
#else
typedef struct tq_struct RTR0LNXWORKQUEUEITEM;
#endif
DECLHIDDEN(void) rtR0LnxWorkqueuePush(RTR0LNXWORKQUEUEITEM *pWork, void (*pfnWorker)(RTR0LNXWORKQUEUEITEM *));
DECLHIDDEN(void) rtR0LnxWorkqueueFlush(void);
/*
* Memory hacks from memobj-r0drv-linux.c that shared folders need.
*/
RTDECL(struct page *) rtR0MemObjLinuxVirtToPage(void *pv);
/*
* Guest Additions changes specific to Red Hat 8.1 and later.
*/
#ifdef RHEL_RELEASE_CODE
# if RHEL_RELEASE_CODE >= RHEL_RELEASE_VERSION(8, 1)
# define RHEL_81
# endif
#endif
#endif /* !IPRT_INCLUDED_SRC_r0drv_linux_the_linux_kernel_h */
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