diff options
Diffstat (limited to 'src/VBox/Runtime/r0drv/linux/thread2-r0drv-linux.c')
| -rw-r--r-- | src/VBox/Runtime/r0drv/linux/thread2-r0drv-linux.c | 233 |
1 files changed, 233 insertions, 0 deletions
diff --git a/src/VBox/Runtime/r0drv/linux/thread2-r0drv-linux.c b/src/VBox/Runtime/r0drv/linux/thread2-r0drv-linux.c new file mode 100644 index 00000000..cd01f32a --- /dev/null +++ b/src/VBox/Runtime/r0drv/linux/thread2-r0drv-linux.c @@ -0,0 +1,233 @@ +/* $Id: thread2-r0drv-linux.c $ */ +/** @file + * IPRT - Threads (Part 2), Ring-0 Driver, Linux. + */ + +/* + * Copyright (C) 2006-2020 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. + */ + + +/********************************************************************************************************************************* +* Header Files * +*********************************************************************************************************************************/ +#include "the-linux-kernel.h" +#include "internal/iprt.h" + +#include <iprt/assert.h> +#include <iprt/thread.h> +#include <iprt/errcore.h> +#include "internal/thread.h" + +#if RTLNX_VER_MIN(4,11,0) + #include <uapi/linux/sched/types.h> +#endif /* >= KERNEL_VERSION(4, 11, 0) */ + +RTDECL(RTTHREAD) RTThreadSelf(void) +{ + return rtThreadGetByNative((RTNATIVETHREAD)current); +} + + +DECLHIDDEN(int) rtThreadNativeInit(void) +{ + return VINF_SUCCESS; +} + + +DECLHIDDEN(int) rtThreadNativeSetPriority(PRTTHREADINT pThread, RTTHREADTYPE enmType) +{ +#if RTLNX_VER_MIN(2,5,2) + /* + * Assignments are partially based on g_aTypesLinuxFree but + * scaled up in the high priority end. + * + * 5.9.0 - : + * The sched_set_normal interfaces does not really check the input, + * whereas sched_set_fifo & sched_set_fifo_low have fixed assignments. + * 2.6.11 - 5.9.0: + * Use sched_setscheduler to try effect FIFO scheduling + * for IO and TIMER threads, otherwise use set_user_nice. + * 2.5.2 - 5.9.0: + * Use set_user_nice to renice the thread. + */ + int iNice = 0; +# if RTLNX_VER_MAX(5,9,0) + int rc; +# if RTLNX_VER_MIN(2,6,11) + int iSchedClass = SCHED_NORMAL; + struct sched_param Param = { .sched_priority = 0 }; +# endif +# endif + switch (enmType) + { + case RTTHREADTYPE_INFREQUENT_POLLER: + iNice = +3; + break; + + case RTTHREADTYPE_MAIN_HEAVY_WORKER: + iNice = +2; + break; + + case RTTHREADTYPE_EMULATION: + iNice = +1; + break; + + case RTTHREADTYPE_DEFAULT: + case RTTHREADTYPE_GUI: + case RTTHREADTYPE_MAIN_WORKER: + iNice = 0; + break; + + case RTTHREADTYPE_VRDP_IO: + case RTTHREADTYPE_DEBUGGER: + iNice = -1; + break; + + case RTTHREADTYPE_MSG_PUMP: + iNice = -2; + break; + + case RTTHREADTYPE_IO: +# if RTLNX_VER_MIN(5,9,0) + sched_set_fifo_low(current); + return VINF_SUCCESS; +# else + iNice = -12; +# if RTLNX_VER_MIN(2,6,11) + iSchedClass = SCHED_FIFO; + Param.sched_priority = 1; /* => prio=98; */ +# endif + break; +# endif + + case RTTHREADTYPE_TIMER: +# if RTLNX_VER_MIN(5,9,0) + sched_set_fifo(current); + return VINF_SUCCESS; +# else + iNice = -19; +# if RTLNX_VER_MIN(2,6,11) + iSchedClass = SCHED_FIFO; + Param.sched_priority = MAX_RT_PRIO / 2; /* => prio=49 */ +# endif + break; +# endif + default: + AssertMsgFailedReturn(("enmType=%d\n", enmType), VERR_INVALID_PARAMETER); + } + +# if RTLNX_VER_MIN(5,9,0) + /* + * We only get here for renice work. + */ + sched_set_normal(current, iNice); + +# else /* < 5.9.0 */ +# if RTLNX_VER_MIN(2,6,11) + /* + * Try set scheduler parameters. + * Fall back on normal + nice if this fails for FIFO policy.* + */ + rc = sched_setscheduler(current, iSchedClass, &Param); + if (rc) + { + Param.sched_priority = 0; + iSchedClass = SCHED_NORMAL; + rc = sched_setscheduler(current, iSchedClass, &Param); + } + + /* + * Renice if using normal scheduling class. + */ + if (iSchedClass == SCHED_NORMAL) +# endif /* >= 2.6.11 */ + set_user_nice(current, iNice); + +# endif /* < 5.9.0 */ +#else /* < 2.5.2 */ + RT_NOREF_PV(enmType); +#endif /* < 2.5.2 */ + RT_NOREF_PV(pThread); + return VINF_SUCCESS; +} + + +DECLHIDDEN(int) rtThreadNativeAdopt(PRTTHREADINT pThread) +{ + RT_NOREF_PV(pThread); + return VERR_NOT_IMPLEMENTED; +} + + +DECLHIDDEN(void) rtThreadNativeWaitKludge(PRTTHREADINT pThread) +{ + /** @todo fix RTThreadWait/RTR0Term race on linux. */ + RTThreadSleep(1); NOREF(pThread); +} + + +DECLHIDDEN(void) rtThreadNativeDestroy(PRTTHREADINT pThread) +{ + NOREF(pThread); +} + + +#if RTLNX_VER_MIN(2,6,4) +/** + * Native kernel thread wrapper function. + * + * This will forward to rtThreadMain and do termination upon return. + * + * @param pvArg Pointer to the argument package. + */ +static int rtThreadNativeMain(void *pvArg) +{ + PRTTHREADINT pThread = (PRTTHREADINT)pvArg; + + rtThreadMain(pThread, (RTNATIVETHREAD)current, &pThread->szName[0]); + return 0; +} +#endif + + +DECLHIDDEN(int) rtThreadNativeCreate(PRTTHREADINT pThreadInt, PRTNATIVETHREAD pNativeThread) +{ +#if RTLNX_VER_MIN(2,6,4) + struct task_struct *NativeThread; + IPRT_LINUX_SAVE_EFL_AC(); + + RT_ASSERT_PREEMPTIBLE(); + + NativeThread = kthread_run(rtThreadNativeMain, pThreadInt, "iprt-%s", pThreadInt->szName); + + if (!IS_ERR(NativeThread)) + { + *pNativeThread = (RTNATIVETHREAD)NativeThread; + IPRT_LINUX_RESTORE_EFL_AC(); + return VINF_SUCCESS; + } + IPRT_LINUX_RESTORE_EFL_AC(); + return VERR_GENERAL_FAILURE; +#else + return VERR_NOT_IMPLEMENTED; +#endif +} + |