1 files changed, 324 insertions, 0 deletions
diff --git a/src/VBox/Runtime/r0drv/darwin/mp-r0drv-darwin.cpp b/src/VBox/Runtime/r0drv/darwin/mp-r0drv-darwin.cpp
new file mode 100644
index 00000000..7e7ad56e
--- /dev/null
+++ b/src/VBox/Runtime/r0drv/darwin/mp-r0drv-darwin.cpp
@@ -0,0 +1,324 @@
+/* $Id: mp-r0drv-darwin.cpp $ */
+/** @file
+ * IPRT - Multiprocessor, Ring-0 Driver, Darwin.
+ */
+
+/*
+ * Copyright (C) 2008-2023 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 <https://www.gnu.org/licenses>.
+ *
+ * The contents of this file may alternatively be used under the terms
+ * of the Common Development and Distribution License Version 1.0
+ * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
+ * in the VirtualBox 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.
+ *
+ * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
+ */
+
+
+/*********************************************************************************************************************************
+*   Header Files                                                                                                                 *
+*********************************************************************************************************************************/
+#include "the-darwin-kernel.h"
+#include "internal/iprt.h"
+#include <iprt/mp.h>
+
+#if defined(RT_ARCH_AMD64) || defined(RT_ARCH_X86)
+# include <iprt/asm-amd64-x86.h>
+#endif
+#include <iprt/cpuset.h>
+#include <iprt/err.h>
+#include "r0drv/mp-r0drv.h"
+
+
+/*********************************************************************************************************************************
+*   Global Variables                                                                                                             *
+*********************************************************************************************************************************/
+static int32_t volatile g_cMaxCpus = -1;
+
+
+static int rtMpDarwinInitMaxCpus(void)
+{
+    IPRT_DARWIN_SAVE_EFL_AC();
+
+    int32_t cCpus = -1;
+    size_t  oldLen = sizeof(cCpus);
+    int rc = sysctlbyname("hw.ncpu", &cCpus, &oldLen, NULL, NULL);
+    if (rc)
+    {
+        printf("IPRT: sysctlbyname(hw.ncpu) failed with rc=%d!\n", rc);
+        cCpus = 64; /* whatever */
+    }
+
+    ASMAtomicWriteS32(&g_cMaxCpus, cCpus);
+
+    IPRT_DARWIN_RESTORE_EFL_AC();
+    return cCpus;
+}
+
+
+DECLINLINE(int) rtMpDarwinMaxCpus(void)
+{
+    int cCpus = g_cMaxCpus;
+    if (RT_UNLIKELY(cCpus <= 0))
+        return rtMpDarwinInitMaxCpus();
+    return cCpus;
+}
+
+
+RTDECL(RTCPUID) RTMpCpuId(void)
+{
+    return cpu_number();
+}
+
+
+RTDECL(int) RTMpCurSetIndex(void)
+{
+    return cpu_number();
+}
+
+
+RTDECL(int) RTMpCurSetIndexAndId(PRTCPUID pidCpu)
+{
+    return *pidCpu = cpu_number();
+}
+
+
+RTDECL(int) RTMpCpuIdToSetIndex(RTCPUID idCpu)
+{
+    return idCpu < RTCPUSET_MAX_CPUS ? (int)idCpu : -1;
+}
+
+
+RTDECL(RTCPUID) RTMpCpuIdFromSetIndex(int iCpu)
+{
+    return (unsigned)iCpu < RTCPUSET_MAX_CPUS ? (RTCPUID)iCpu : NIL_RTCPUID;
+}
+
+
+RTDECL(RTCPUID) RTMpGetMaxCpuId(void)
+{
+    return rtMpDarwinMaxCpus() - 1;
+}
+
+
+RTDECL(bool) RTMpIsCpuPossible(RTCPUID idCpu)
+{
+    return idCpu < RTCPUSET_MAX_CPUS
+        && idCpu < (RTCPUID)rtMpDarwinMaxCpus();
+}
+
+
+RTDECL(PRTCPUSET) RTMpGetSet(PRTCPUSET pSet)
+{
+    RTCPUID idCpu;
+
+    RTCpuSetEmpty(pSet);
+    idCpu = RTMpGetMaxCpuId();
+    do
+    {
+        if (RTMpIsCpuPossible(idCpu))
+            RTCpuSetAdd(pSet, idCpu);
+    } while (idCpu-- > 0);
+    return pSet;
+}
+
+
+RTDECL(RTCPUID) RTMpGetCount(void)
+{
+    return rtMpDarwinMaxCpus();
+}
+
+
+RTDECL(PRTCPUSET) RTMpGetOnlineSet(PRTCPUSET pSet)
+{
+    /** @todo darwin R0 MP */
+    return RTMpGetSet(pSet);
+}
+
+
+RTDECL(RTCPUID) RTMpGetOnlineCount(void)
+{
+    /** @todo darwin R0 MP */
+    return RTMpGetCount();
+}
+
+
+RTDECL(bool) RTMpIsCpuOnline(RTCPUID idCpu)
+{
+    /** @todo darwin R0 MP */
+    return RTMpIsCpuPossible(idCpu);
+}
+
+
+RTDECL(uint32_t) RTMpGetCurFrequency(RTCPUID idCpu)
+{
+    /** @todo darwin R0 MP (rainy day) */
+    RT_NOREF(idCpu);
+    return 0;
+}
+
+
+RTDECL(uint32_t) RTMpGetMaxFrequency(RTCPUID idCpu)
+{
+    /** @todo darwin R0 MP (rainy day) */
+    RT_NOREF(idCpu);
+    return 0;
+}
+
+
+RTDECL(bool) RTMpIsCpuWorkPending(void)
+{
+    /** @todo (not used on non-Windows platforms yet). */
+    return false;
+}
+
+
+/**
+ * Wrapper between the native darwin per-cpu callback and PFNRTWORKER
+ * for the RTMpOnAll API.
+ *
+ * @param   pvArg   Pointer to the RTMPARGS package.
+ */
+static void rtmpOnAllDarwinWrapper(void *pvArg)
+{
+    PRTMPARGS pArgs = (PRTMPARGS)pvArg;
+    IPRT_DARWIN_SAVE_EFL_AC();
+    pArgs->pfnWorker(cpu_number(), pArgs->pvUser1, pArgs->pvUser2);
+    IPRT_DARWIN_RESTORE_EFL_AC();
+}
+
+
+RTDECL(int) RTMpOnAll(PFNRTMPWORKER pfnWorker, void *pvUser1, void *pvUser2)
+{
+    RT_ASSERT_INTS_ON();
+    IPRT_DARWIN_SAVE_EFL_AC();
+
+    RTMPARGS Args;
+    Args.pfnWorker = pfnWorker;
+    Args.pvUser1 = pvUser1;
+    Args.pvUser2 = pvUser2;
+    Args.idCpu = NIL_RTCPUID;
+    Args.cHits = 0;
+    mp_rendezvous_no_intrs(rtmpOnAllDarwinWrapper, &Args);
+
+    IPRT_DARWIN_RESTORE_EFL_AC();
+    return VINF_SUCCESS;
+}
+
+
+/**
+ * Wrapper between the native darwin per-cpu callback and PFNRTWORKER
+ * for the RTMpOnOthers API.
+ *
+ * @param   pvArg   Pointer to the RTMPARGS package.
+ */
+static void rtmpOnOthersDarwinWrapper(void *pvArg)
+{
+    PRTMPARGS pArgs = (PRTMPARGS)pvArg;
+    RTCPUID idCpu = cpu_number();
+    if (pArgs->idCpu != idCpu)
+    {
+        IPRT_DARWIN_SAVE_EFL_AC();
+        pArgs->pfnWorker(idCpu, pArgs->pvUser1, pArgs->pvUser2);
+        IPRT_DARWIN_RESTORE_EFL_AC();
+    }
+}
+
+
+RTDECL(int) RTMpOnOthers(PFNRTMPWORKER pfnWorker, void *pvUser1, void *pvUser2)
+{
+    RT_ASSERT_INTS_ON();
+    IPRT_DARWIN_SAVE_EFL_AC();
+
+    RTMPARGS Args;
+    Args.pfnWorker = pfnWorker;
+    Args.pvUser1 = pvUser1;
+    Args.pvUser2 = pvUser2;
+    Args.idCpu = RTMpCpuId();
+    Args.cHits = 0;
+    mp_rendezvous_no_intrs(rtmpOnOthersDarwinWrapper, &Args);
+
+    IPRT_DARWIN_RESTORE_EFL_AC();
+    return VINF_SUCCESS;
+}
+
+
+/**
+ * Wrapper between the native darwin per-cpu callback and PFNRTWORKER
+ * for the RTMpOnSpecific API.
+ *
+ * @param   pvArg   Pointer to the RTMPARGS package.
+ */
+static void rtmpOnSpecificDarwinWrapper(void *pvArg)
+{
+    PRTMPARGS pArgs = (PRTMPARGS)pvArg;
+    RTCPUID idCpu = cpu_number();
+    if (pArgs->idCpu == idCpu)
+    {
+        IPRT_DARWIN_SAVE_EFL_AC();
+        pArgs->pfnWorker(idCpu, pArgs->pvUser1, pArgs->pvUser2);
+        ASMAtomicIncU32(&pArgs->cHits);
+        IPRT_DARWIN_RESTORE_EFL_AC();
+    }
+}
+
+
+RTDECL(int) RTMpOnSpecific(RTCPUID idCpu, PFNRTMPWORKER pfnWorker, void *pvUser1, void *pvUser2)
+{
+    RT_ASSERT_INTS_ON();
+    IPRT_DARWIN_SAVE_EFL_AC();
+
+    RTMPARGS Args;
+    Args.pfnWorker = pfnWorker;
+    Args.pvUser1 = pvUser1;
+    Args.pvUser2 = pvUser2;
+    Args.idCpu = idCpu;
+    Args.cHits = 0;
+    mp_rendezvous_no_intrs(rtmpOnSpecificDarwinWrapper, &Args);
+
+    IPRT_DARWIN_RESTORE_EFL_AC();
+    return Args.cHits == 1
+         ? VINF_SUCCESS
+         : VERR_CPU_NOT_FOUND;
+}
+
+
+RTDECL(int) RTMpPokeCpu(RTCPUID idCpu)
+{
+    RT_ASSERT_INTS_ON();
+
+    if (g_pfnR0DarwinCpuInterrupt == NULL)
+        return VERR_NOT_SUPPORTED;
+    IPRT_DARWIN_SAVE_EFL_AC(); /* paranoia */
+    /// @todo use mp_cpus_kick() when available (since 10.10)?  It's probably slower (locks, mask iteration, checks), though...
+    g_pfnR0DarwinCpuInterrupt(idCpu);
+    IPRT_DARWIN_RESTORE_EFL_AC();
+    return VINF_SUCCESS;
+}
+
+
+RTDECL(bool) RTMpOnAllIsConcurrentSafe(void)
+{
+    return true;
+}
+