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Diffstat (limited to 'src/VBox/Runtime/r0drv/darwin/mp-r0drv-darwin.cpp')
-rw-r--r--src/VBox/Runtime/r0drv/darwin/mp-r0drv-darwin.cpp324
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;
+}
+
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