/* $Id: tstMicroRC.cpp 98103 2023-01-17 14:15:46Z vboxsync $ */ /** @file * Micro Testcase, profiling special CPU operations - GC Code (hacks). */ /* * Copyright (C) 2006-2023 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 * *********************************************************************************************************************************/ #include #include #include #include "tstMicro.h" #include #include #include #include #include /********************************************************************************************************************************* * Internal Functions * *********************************************************************************************************************************/ RT_C_DECLS_BEGIN DECLEXPORT(int) tstMicroRC(PTSTMICRO pTst, unsigned uTestcase); RT_C_DECLS_END /** * Save and load our IDT. * * @param pTst Pointer to the instance data. * @param iIDT The index of the IDT entry which should be hooked. */ void idtInstall(PTSTMICRO pTst, int iIDT) { RTIDTR Idtr; ASMGetIDTR(&Idtr); if (Idtr.pIdt == (uintptr_t)&pTst->aIDT[0]) return; pTst->OriginalIDTR.cbIdt = Idtr.cbIdt; pTst->OriginalIDTR.pIdt = Idtr.pIdt; /* * Copy the IDT. */ if (Idtr.cbIdt >= sizeof(pTst->aIDT)) Idtr.cbIdt = sizeof(pTst->aIDT) - 1; memcpy(&pTst->aIDT[0], (void *)Idtr.pIdt, Idtr.cbIdt + 1); /* Hook up IDT entry. */ if (iIDT >= 0) { uintptr_t uHandler = (uintptr_t)tstTrapHandlerNoErr; if ( iIDT == 8 || iIDT == 0xa || iIDT == 0xb || iIDT == 0xc || iIDT == 0xd || iIDT == 0xe || iIDT == 0x11) uHandler = (uintptr_t)tstTrapHandler; pTst->aIDT[iIDT].Int.u16OffsetHigh = uHandler >> 16; pTst->aIDT[iIDT].Int.u16OffsetLow = uHandler & 0xffff; pTst->aIDT[iIDT].Int.u16SegSel = SELMGetHyperCS(&g_VM); pTst->aIDT[iIDT].Int.u2DPL = 3; pTst->aIDT[iIDT].Int.u1Present = 1; pTst->aIDT[iIDT].Int.u1Fixed0 = 0; pTst->aIDT[iIDT].Int.u1Fixed1 = 0; pTst->aIDT[iIDT].Int.u1Fixed2 = 0; pTst->aIDT[iIDT].Int.u1Fixed3 = 0; pTst->aIDT[iIDT].Int.u1Fixed4 = 1; pTst->aIDT[iIDT].Int.u1Fixed5 = 1; pTst->aIDT[iIDT].Int.u132BitGate = 1; pTst->aIDT[iIDT].Int.u1Fixed6 = 0; pTst->aIDT[iIDT].Int.u5Reserved2 = 0; } /* Install int 42h, R3 gate */ pTst->aIDT[0x42].Int.u16OffsetHigh = (uintptr_t)tstInterrupt42 >> 16; pTst->aIDT[0x42].Int.u16OffsetLow = (uintptr_t)tstInterrupt42 & 0xffff; pTst->aIDT[0x42].Int.u16SegSel = SELMGetHyperCS(&g_VM); pTst->aIDT[0x42].Int.u2DPL = 3; pTst->aIDT[0x42].Int.u1Present = 1; pTst->aIDT[0x42].Int.u1Fixed0 = 0; pTst->aIDT[0x42].Int.u1Fixed1 = 0; pTst->aIDT[0x42].Int.u1Fixed2 = 0; pTst->aIDT[0x42].Int.u1Fixed3 = 0; pTst->aIDT[0x42].Int.u1Fixed4 = 1; pTst->aIDT[0x42].Int.u1Fixed5 = 1; pTst->aIDT[0x42].Int.u132BitGate = 1; pTst->aIDT[0x42].Int.u1Fixed6 = 0; pTst->aIDT[0x42].Int.u5Reserved2 = 0; /* * Load our IDT. */ Idtr.pIdt = (uintptr_t)&pTst->aIDT[0]; ASMSetIDTR(&Idtr); RTIDTR Idtr2; ASMGetIDTR(&Idtr2); Assert(Idtr2.pIdt == (uintptr_t)&pTst->aIDT[0]); } /** * Removes all trap overrides except for gate 42. */ DECLASM(void) idtOnly42(PTSTMICRO pTst) { if (pTst->OriginalIDTR.pIdt) memcpy(&pTst->aIDT[0], (void *)(uintptr_t)pTst->OriginalIDTR.pIdt, sizeof(VBOXIDTE) * 32); } DECLEXPORT(int) tstMicroRC(PTSTMICRO pTst, unsigned uTestcase) { RTLogPrintf("pTst=%p uTestcase=%d\n", pTst, uTestcase); /* * Validate input. */ if (uTestcase >= TSTMICROTEST_MAX) return VERR_INVALID_PARAMETER; /* * Clear the results. */ pTst->u64TSCR0Start = 0; pTst->u64TSCRxStart = 0; pTst->u64TSCR0Enter = 0; pTst->u64TSCR0Exit = 0; pTst->u64TSCRxEnd = 0; pTst->u64TSCR0End = 0; pTst->cHits = 0; pTst->offEIPAdd = 0; pTst->u32CR2 = 0; pTst->u32EIP = 0; pTst->u32ErrCd = 0; PTSTMICRORESULT pRes = &pTst->aResults[uTestcase]; memset(&pTst->aResults[uTestcase], 0, sizeof(pTst->aResults[uTestcase])); /* * Do the testcase. */ int rc = VINF_SUCCESS; switch (uTestcase) { case TSTMICROTEST_OVERHEAD: { tstOverhead(pTst); break; } case TSTMICROTEST_INVLPG_0: { tstInvlpg0(pTst); break; } case TSTMICROTEST_INVLPG_EIP: { tstInvlpgEIP(pTst); break; } case TSTMICROTEST_INVLPG_ESP: { tstInvlpgESP(pTst); break; } case TSTMICROTEST_CR3_RELOAD: { tstCR3Reload(pTst); break; } case TSTMICROTEST_WP_DISABLE: { tstWPDisable(pTst); break; } case TSTMICROTEST_WP_ENABLE: { tstWPEnable(pTst); break; } case TSTMICROTEST_PF_R0: { idtInstall(pTst, 0xe); pTst->offEIPAdd = 2; rc = tstPFR0(pTst); break; } case TSTMICROTEST_PF_R1: { idtInstall(pTst, 0xe); pTst->offEIPAdd = 2; rc = tstPFR1(pTst); break; } case TSTMICROTEST_PF_R2: { idtInstall(pTst, 0xe); pTst->offEIPAdd = 2; rc = tstPFR2(pTst); break; } case TSTMICROTEST_PF_R3: { idtInstall(pTst, 0xe); pTst->offEIPAdd = 2; rc = tstPFR3(pTst); break; } } /* * Compute the results. */ if (pTst->u64TSCR0End && pTst->u64TSCR0Start) pRes->cTotalTicks = pTst->u64TSCR0End - pTst->u64TSCR0Start - pTst->u64Overhead; if (pTst->u64TSCRxStart && pTst->u64TSCR0Start) pRes->cToRxFirstTicks = pTst->u64TSCRxStart - pTst->u64TSCR0Start - pTst->u64Overhead; if (pTst->u64TSCR0Enter && pTst->u64TSCRxStart) pRes->cTrapTicks = pTst->u64TSCR0Enter - pTst->u64TSCRxStart - pTst->u64Overhead; if (pTst->u64TSCRxEnd && pTst->u64TSCR0Exit) pRes->cToRxTrapTicks = pTst->u64TSCRxEnd - pTst->u64TSCR0Exit - pTst->u64Overhead; if (pTst->u64TSCR0End && pTst->u64TSCRxEnd) pRes->cToR0Ticks = pTst->u64TSCR0End - pTst->u64TSCRxEnd - pTst->u64Overhead; return rc; }