the-linux-kernel.h revision 7995839c0b791ae2334df998d34dbccac12b3b41
45565249f149f7562fc6ee85be7ca3a3706e32e6vboxsync * IPRT - Include all necessary headers for the Linux kernel.
bb73206f5ad484c56a70984ee9897e9ffee18b8bvboxsync * Copyright (C) 2006-2007 Oracle Corporation
bb73206f5ad484c56a70984ee9897e9ffee18b8bvboxsync * This file is part of VirtualBox Open Source Edition (OSE), as
bb73206f5ad484c56a70984ee9897e9ffee18b8bvboxsync * available from http://www.virtualbox.org. This file is free software;
bb73206f5ad484c56a70984ee9897e9ffee18b8bvboxsync * you can redistribute it and/or modify it under the terms of the GNU
bb73206f5ad484c56a70984ee9897e9ffee18b8bvboxsync * General Public License (GPL) as published by the Free Software
bb73206f5ad484c56a70984ee9897e9ffee18b8bvboxsync * Foundation, in version 2 as it comes in the "COPYING" file of the
bb73206f5ad484c56a70984ee9897e9ffee18b8bvboxsync * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
bb73206f5ad484c56a70984ee9897e9ffee18b8bvboxsync * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
bb73206f5ad484c56a70984ee9897e9ffee18b8bvboxsync * The contents of this file may alternatively be used under the terms
bb73206f5ad484c56a70984ee9897e9ffee18b8bvboxsync * of the Common Development and Distribution License Version 1.0
bb73206f5ad484c56a70984ee9897e9ffee18b8bvboxsync * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
bb73206f5ad484c56a70984ee9897e9ffee18b8bvboxsync * VirtualBox OSE distribution, in which case the provisions of the
bb73206f5ad484c56a70984ee9897e9ffee18b8bvboxsync * CDDL are applicable instead of those of the GPL.
bb73206f5ad484c56a70984ee9897e9ffee18b8bvboxsync * You may elect to license modified versions of this file under the
bb73206f5ad484c56a70984ee9897e9ffee18b8bvboxsync * terms and conditions of either the GPL or the CDDL or both.
bb73206f5ad484c56a70984ee9897e9ffee18b8bvboxsync * Include iprt/types.h to install the bool wrappers.
bb73206f5ad484c56a70984ee9897e9ffee18b8bvboxsync * Then use the linux bool type for all the stuff include here.
bb73206f5ad484c56a70984ee9897e9ffee18b8bvboxsync/* We only support 2.4 and 2.6 series kernels */
bb73206f5ad484c56a70984ee9897e9ffee18b8bvboxsync#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 5, 0) && LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 0)
cea5568645ca17479265436cfd5ba010ddd106d9vboxsync#if defined(CONFIG_MODVERSIONS) && !defined(MODVERSIONS)
cea5568645ca17479265436cfd5ba010ddd106d9vboxsync# define KBUILD_STR(s) #s
84eeabfd29e718854e00e795879dab6ce61469e5vboxsync#else /* older kernels */
7df18da2bb5ae3a14ee50837d5eceb4212b0692dvboxsync#endif /* older kernels */
bb73206f5ad484c56a70984ee9897e9ffee18b8bvboxsync/* For the basic additions module */
7df18da2bb5ae3a14ee50837d5eceb4212b0692dvboxsync#ifndef HAVE_UNLOCKED_IOCTL /* linux/fs.h defines this */
7df18da2bb5ae3a14ee50837d5eceb4212b0692dvboxsync/* For the shared folders module */
bb73206f5ad484c56a70984ee9897e9ffee18b8bvboxsync# define DEFINE_WAIT(name) DECLARE_WAITQUEUE(name, current)
bb73206f5ad484c56a70984ee9897e9ffee18b8bvboxsync * 2.4 / early 2.6 compatibility wrappers
bb73206f5ad484c56a70984ee9897e9ffee18b8bvboxsync# if LINUX_VERSION_CODE < KERNEL_VERSION(2, 4, 29) || LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 0)
bb73206f5ad484c56a70984ee9897e9ffee18b8bvboxsyncDECLINLINE(unsigned int) jiffies_to_msecs(unsigned long cJiffies)
bb73206f5ad484c56a70984ee9897e9ffee18b8bvboxsyncDECLINLINE(unsigned long) msecs_to_jiffies(unsigned int cMillies)
4b30f6c72b07654509606857da385afcc09aaae3vboxsync# endif /* < 2.4.29 || >= 2.6.0 */
bb73206f5ad484c56a70984ee9897e9ffee18b8bvboxsync#endif /* < 2.6.7 */
bb73206f5ad484c56a70984ee9897e9ffee18b8bvboxsync * 2.4 compatibility wrappers
bb73206f5ad484c56a70984ee9897e9ffee18b8bvboxsync } while (0)
7df18da2bb5ae3a14ee50837d5eceb4212b0692dvboxsync } while (0)
bb73206f5ad484c56a70984ee9897e9ffee18b8bvboxsync } while (0)
bb73206f5ad484c56a70984ee9897e9ffee18b8bvboxsync#else /* >= 2.6.0 */
bb73206f5ad484c56a70984ee9897e9ffee18b8bvboxsync#endif /* >= 2.6.0 */
a1537beae84f906549aaabab46d498051e438267vboxsync/** @def TICK_NSEC
bb73206f5ad484c56a70984ee9897e9ffee18b8bvboxsync * The time between ticks in nsec */
bb73206f5ad484c56a70984ee9897e9ffee18b8bvboxsync * This sucks soooo badly on x86! Why don't they export __PAGE_KERNEL_EXEC so PAGE_KERNEL_EXEC would be usable?
bb73206f5ad484c56a70984ee9897e9ffee18b8bvboxsync#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 8) && defined(RT_ARCH_AMD64)
bb73206f5ad484c56a70984ee9897e9ffee18b8bvboxsync#elif LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 8) && defined(PAGE_KERNEL_EXEC) && defined(CONFIG_X86_PAE)
bb73206f5ad484c56a70984ee9897e9ffee18b8bvboxsync /* >= 2.6.27 */
bb73206f5ad484c56a70984ee9897e9ffee18b8bvboxsync# define MY_PAGE_KERNEL_EXEC __pgprot(cpu_has_pge ? __PAGE_KERNEL_EXEC | _PAGE_GLOBAL : __PAGE_KERNEL_EXEC)
bb73206f5ad484c56a70984ee9897e9ffee18b8bvboxsync# define MY_PAGE_KERNEL_EXEC __pgprot(cpu_has_pge ? _PAGE_KERNEL_EXEC | _PAGE_GLOBAL : _PAGE_KERNEL_EXEC)
7df18da2bb5ae3a14ee50837d5eceb4212b0692dvboxsync * The redhat hack section.
84eeabfd29e718854e00e795879dab6ce61469e5vboxsync * - The current hacks are for 2.4.21-15.EL only.
84eeabfd29e718854e00e795879dab6ce61469e5vboxsync/* accounting. */
84eeabfd29e718854e00e795879dab6ce61469e5vboxsync# define MY_DO_MUNMAP(a,b,c) do_munmap(a, b, c, 0) /* should it be 1 or 0? */
84eeabfd29e718854e00e795879dab6ce61469e5vboxsync/* backported remap_page_range. */
84eeabfd29e718854e00e795879dab6ce61469e5vboxsync/* In 2.6.9-22.ELsmp we have to call change_page_attr() twice when changing
84eeabfd29e718854e00e795879dab6ce61469e5vboxsync * the page attributes from PAGE_KERNEL to something else, because there appears
1c2c968fd241148110002d75b2c0fdeddc211e14vboxsync * to be a bug in one of the many patches that redhat applied.
3a5d16e1911830b585d10278ea2cdbb408e261e6vboxsync * It should be safe to do this on less buggy linux kernels too. ;-)
59e8feed5ffd306be4de820c67f766591aaa9b69vboxsync# define MY_CHANGE_PAGE_ATTR(pPages, cPages, prot) \
84eeabfd29e718854e00e795879dab6ce61469e5vboxsync } while (0)
84eeabfd29e718854e00e795879dab6ce61469e5vboxsync# endif /* !RT_ARCH_AMD64 */
bb73206f5ad484c56a70984ee9897e9ffee18b8bvboxsync#endif /* !NO_REDHAT_HACKS */
7df18da2bb5ae3a14ee50837d5eceb4212b0692dvboxsync# ifdef RT_ARCH_AMD64 /** @todo This is a cheap hack, but it'll get around that 'else BUG();' in __change_page_attr(). */
7df18da2bb5ae3a14ee50837d5eceb4212b0692dvboxsync# define MY_CHANGE_PAGE_ATTR(pPages, cPages, prot) \
7df18da2bb5ae3a14ee50837d5eceb4212b0692dvboxsync change_page_attr(pPages, cPages, PAGE_KERNEL_NOCACHE); \
7df18da2bb5ae3a14ee50837d5eceb4212b0692dvboxsync } while (0)
7df18da2bb5ae3a14ee50837d5eceb4212b0692dvboxsync# define MY_CHANGE_PAGE_ATTR(pPages, cPages, prot) change_page_attr(pPages, cPages, prot)
84eeabfd29e718854e00e795879dab6ce61469e5vboxsync# define MY_SET_PAGES_EXEC(pPages, cPages) set_pages_x(pPages, cPages)
84eeabfd29e718854e00e795879dab6ce61469e5vboxsync# define MY_SET_PAGES_NOEXEC(pPages, cPages) set_pages_nx(pPages, cPages)
84eeabfd29e718854e00e795879dab6ce61469e5vboxsync if (pgprot_val(MY_PAGE_KERNEL_EXEC) != pgprot_val(PAGE_KERNEL)) \
84eeabfd29e718854e00e795879dab6ce61469e5vboxsync MY_CHANGE_PAGE_ATTR(pPages, cPages, MY_PAGE_KERNEL_EXEC); \
59e8feed5ffd306be4de820c67f766591aaa9b69vboxsync } while (0)
59e8feed5ffd306be4de820c67f766591aaa9b69vboxsync if (pgprot_val(MY_PAGE_KERNEL_EXEC) != pgprot_val(PAGE_KERNEL)) \
84eeabfd29e718854e00e795879dab6ce61469e5vboxsync MY_CHANGE_PAGE_ATTR(pPages, cPages, PAGE_KERNEL); \
84eeabfd29e718854e00e795879dab6ce61469e5vboxsync } while (0)
d27bf03c13c7a5707386600ef9b0bbb82fb3420dvboxsync/** @def ONE_MSEC_IN_JIFFIES
59e8feed5ffd306be4de820c67f766591aaa9b69vboxsync * The number of jiffies that make up 1 millisecond. Must be at least 1! */
84eeabfd29e718854e00e795879dab6ce61469e5vboxsync# error "HZ is not a multiple of 1000, the GIP stuff won't work right!"
84eeabfd29e718854e00e795879dab6ce61469e5vboxsync * Stop using the linux bool type.
59e8feed5ffd306be4de820c67f766591aaa9b69vboxsync * There are post-2.6.24 kernels (confusingly with unchanged version number)
59e8feed5ffd306be4de820c67f766591aaa9b69vboxsync * which eliminate macros which were marked as deprecated.
7df18da2bb5ae3a14ee50837d5eceb4212b0692dvboxsync * Hack for shortening pointers on linux so we can stuff more stuff into the
7df18da2bb5ae3a14ee50837d5eceb4212b0692dvboxsync * task_struct::comm field. This is used by the semaphore code but put here
0dd363d45ea01de87d37118985064da6e0f86f36vboxsync * because we don't have any better place atm. Don't use outside IPRT, please.
bb73206f5ad484c56a70984ee9897e9ffee18b8bvboxsync# define IPRT_DEBUG_SEMS_ADDRESS(addr) ( ((long)(addr) & (long)~UINT64_C(0xfffffff000000000)) )
bb73206f5ad484c56a70984ee9897e9ffee18b8bvboxsync# define IPRT_DEBUG_SEMS_ADDRESS(addr) ( (long)(addr) )
84eeabfd29e718854e00e795879dab6ce61469e5vboxsync * Puts semaphore info into the task_struct::comm field if IPRT_DEBUG_SEMS is
bb73206f5ad484c56a70984ee9897e9ffee18b8bvboxsync snprintf(current->comm, sizeof(current->comm), "%c%lx", (chState), IPRT_DEBUG_SEMS_ADDRESS(pThis));
bb73206f5ad484c56a70984ee9897e9ffee18b8bvboxsync# define IPRT_DEBUG_SEMS_STATE(pThis, chState) do { } while (0)
84eeabfd29e718854e00e795879dab6ce61469e5vboxsync * Puts semaphore info into the task_struct::comm field if IPRT_DEBUG_SEMS is
84eeabfd29e718854e00e795879dab6ce61469e5vboxsync# define IPRT_DEBUG_SEMS_STATE_RC(pThis, chState, rc) \
bb73206f5ad484c56a70984ee9897e9ffee18b8bvboxsync snprintf(current->comm, sizeof(current->comm), "%c%lx:%d", (chState), IPRT_DEBUG_SEMS_ADDRESS(pThis), rc);
84eeabfd29e718854e00e795879dab6ce61469e5vboxsync# define IPRT_DEBUG_SEMS_STATE_RC(pThis, chState, rc) do { } while (0)
84eeabfd29e718854e00e795879dab6ce61469e5vboxsync * There are some conflicting defines in iprt/param.h, sort them out here.
84eeabfd29e718854e00e795879dab6ce61469e5vboxsync * Some global indicator macros.
84eeabfd29e718854e00e795879dab6ce61469e5vboxsync/** @def IPRT_LINUX_HAS_HRTIMER
84eeabfd29e718854e00e795879dab6ce61469e5vboxsync * Whether the kernel support high resolution timers (Linux kernel versions
bb73206f5ad484c56a70984ee9897e9ffee18b8bvboxsync * 2.6.28 and later (hrtimer_add_expires_ns() & schedule_hrtimeout). */