/* $Id: VMMAll.cpp 106061 2024-09-16 14:03:52Z vboxsync $ */ /** @file * VMM All Contexts. */ /* * Copyright (C) 2006-2024 Oracle and/or its affiliates. * * This file is part of VirtualBox base platform packages, as * available from https://www.virtualbox.org. * * 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, in version 3 of the * License. * * 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, see . * * SPDX-License-Identifier: GPL-3.0-only */ /********************************************************************************************************************************* * Header Files * *********************************************************************************************************************************/ #define LOG_GROUP LOG_GROUP_VMM #include #include "VMMInternal.h" #include #ifdef IN_RING0 # include #endif #include #include #include #include #include /********************************************************************************************************************************* * Global Variables * *********************************************************************************************************************************/ /** User counter for the vmmInitFormatTypes function (pro forma). */ static volatile uint32_t g_cFormatTypeUsers = 0; /** * Helper that formats a decimal number in the range 0..9999. * * @returns The length of the formatted number. * @param pszBuf Output buffer with sufficient space. * @param uNumber The number to format. */ static unsigned vmmFormatTypeShortNumber(char *pszBuf, uint32_t uNumber) { unsigned off = 0; if (uNumber >= 10) { if (uNumber >= 100) { if (uNumber >= 1000) pszBuf[off++] = ((uNumber / 1000) % 10) + '0'; pszBuf[off++] = ((uNumber / 100) % 10) + '0'; } pszBuf[off++] = ((uNumber / 10) % 10) + '0'; } pszBuf[off++] = (uNumber % 10) + '0'; pszBuf[off] = '\0'; return off; } /** * @callback_method_impl{FNRTSTRFORMATTYPE, vmsetcpu} */ static DECLCALLBACK(size_t) vmmFormatTypeVmCpuSet(PFNRTSTROUTPUT pfnOutput, void *pvArgOutput, const char *pszType, void const *pvValue, int cchWidth, int cchPrecision, unsigned fFlags, void *pvUser) { NOREF(pszType); NOREF(cchWidth); NOREF(cchPrecision); NOREF(fFlags); PCVMCPUSET pSet = (PCVMCPUSET)pvValue; uint32_t cCpus = 0; uint32_t iCpu = RT_ELEMENTS(pSet->au32Bitmap) * 32; while (iCpu--) if (VMCPUSET_IS_PRESENT(pSet, iCpu)) cCpus++; char szTmp[32]; AssertCompile(RT_ELEMENTS(pSet->au32Bitmap) * 32 < 999); if (cCpus == 1) { iCpu = RT_ELEMENTS(pSet->au32Bitmap) * 32; while (iCpu--) if (VMCPUSET_IS_PRESENT(pSet, iCpu)) { szTmp[0] = 'c'; szTmp[1] = 'p'; szTmp[2] = 'u'; return pfnOutput(pvArgOutput, szTmp, 3 + vmmFormatTypeShortNumber(&szTmp[3], iCpu)); } cCpus = 0; } if (cCpus == 0) return pfnOutput(pvArgOutput, RT_STR_TUPLE("")); if (cCpus == RT_ELEMENTS(pSet->au32Bitmap) * 32) return pfnOutput(pvArgOutput, RT_STR_TUPLE("")); /* * Print cpus that are present: {1,2,7,9 ... } */ size_t cchRet = pfnOutput(pvArgOutput, "{", 1); cCpus = 0; iCpu = 0; while (iCpu < RT_ELEMENTS(pSet->au32Bitmap) * 32) { if (VMCPUSET_IS_PRESENT(pSet, iCpu)) { /* Output the first cpu number. */ int off = 0; if (cCpus != 0) szTmp[off++] = ','; cCpus++; off += vmmFormatTypeShortNumber(&szTmp[off], iCpu); /* Check for sequence. */ uint32_t const iStart = ++iCpu; while ( iCpu < RT_ELEMENTS(pSet->au32Bitmap) * 32 && VMCPUSET_IS_PRESENT(pSet, iCpu)) { iCpu++; cCpus++; } if (iCpu != iStart) { szTmp[off++] = '-'; off += vmmFormatTypeShortNumber(&szTmp[off], iCpu); } /* Terminate and output. */ szTmp[off] = '\0'; cchRet += pfnOutput(pvArgOutput, szTmp, off); } iCpu++; } cchRet += pfnOutput(pvArgOutput, "}", 1); NOREF(pvUser); return cchRet; } /** * Registers the VMM wide format types. * * Called by VMMR3Init, VMMR0Init and VMMRCInit. */ int vmmInitFormatTypes(void) { int rc = VINF_SUCCESS; if (ASMAtomicIncU32(&g_cFormatTypeUsers) == 1) rc = RTStrFormatTypeRegister("vmcpuset", vmmFormatTypeVmCpuSet, NULL); return rc; } /** * Counterpart to vmmInitFormatTypes, called by VMMR3Term and VMMR0Term. */ void vmmTermFormatTypes(void) { if (ASMAtomicDecU32(&g_cFormatTypeUsers) == 0) RTStrFormatTypeDeregister("vmcpuset"); } /** * Gets the ID of the virtual CPU associated with the calling thread. * * @returns The CPU ID. NIL_VMCPUID if the thread isn't an EMT. * * @param pVM The cross context VM structure. * @internal */ VMMDECL(VMCPUID) VMMGetCpuId(PVMCC pVM) { #if defined(IN_RING3) return VMR3GetVMCPUId(pVM); #elif defined(IN_RING0) PVMCPUCC pVCpu = GVMMR0GetGVCpuByGVMandEMT(pVM, NIL_RTNATIVETHREAD); return pVCpu ? pVCpu->idCpu : NIL_VMCPUID; #else /* RC: Always EMT(0) */ NOREF(pVM); return 0; #endif } /** * Returns the VMCPU of the calling EMT. * * @returns The VMCPU pointer. NULL if not an EMT. * * @param pVM The cross context VM structure. * @internal */ VMMDECL(PVMCPUCC) VMMGetCpu(PVMCC pVM) { #ifdef IN_RING3 VMCPUID idCpu = VMR3GetVMCPUId(pVM); if (idCpu == NIL_VMCPUID) return NULL; Assert(idCpu < pVM->cCpus); return VMCC_GET_CPU(pVM, idCpu); #elif defined(IN_RING0) return GVMMR0GetGVCpuByGVMandEMT(pVM, NIL_RTNATIVETHREAD); #else /* RC: Always EMT(0) */ RT_NOREF(pVM); return &g_VCpu0; #endif /* IN_RING0 */ } /** * Returns the VMCPU of the first EMT thread. * * @returns The VMCPU pointer. * @param pVM The cross context VM structure. * @internal */ VMMDECL(PVMCPUCC) VMMGetCpu0(PVMCC pVM) { Assert(pVM->cCpus == 1); return VMCC_GET_CPU_0(pVM); } /** * Returns the VMCPU of the specified virtual CPU. * * @returns The VMCPU pointer. NULL if idCpu is invalid. * * @param pVM The cross context VM structure. * @param idCpu The ID of the virtual CPU. * @internal */ VMMDECL(PVMCPUCC) VMMGetCpuById(PVMCC pVM, RTCPUID idCpu) { AssertReturn(idCpu < pVM->cCpus, NULL); return VMCC_GET_CPU(pVM, idCpu); } /** * Gets the VBOX_SVN_REV. * * This is just to avoid having to compile a bunch of big files * and requires less Makefile mess. * * @returns VBOX_SVN_REV. */ VMM_INT_DECL(uint32_t) VMMGetSvnRev(void) { return VBOX_SVN_REV; } /** * Returns the build type for matching components. * * @returns Build type value. */ uint32_t vmmGetBuildType(void) { uint32_t uRet = 0xbeef0000; #ifdef DEBUG uRet |= RT_BIT_32(0); #endif #ifdef VBOX_WITH_STATISTICS uRet |= RT_BIT_32(1); #endif return uRet; }