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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:17:27 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:17:27 +0000
commitf215e02bf85f68d3a6106c2a1f4f7f063f819064 (patch)
tree6bb5b92c046312c4e95ac2620b10ddf482d3fa8b /src/VBox/Runtime/generic/RTMpOnPair-generic.cpp
parentInitial commit. (diff)
downloadvirtualbox-f215e02bf85f68d3a6106c2a1f4f7f063f819064.tar.xz
virtualbox-f215e02bf85f68d3a6106c2a1f4f7f063f819064.zip
Adding upstream version 7.0.14-dfsg.upstream/7.0.14-dfsg
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/VBox/Runtime/generic/RTMpOnPair-generic.cpp')
-rw-r--r--src/VBox/Runtime/generic/RTMpOnPair-generic.cpp148
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diff --git a/src/VBox/Runtime/generic/RTMpOnPair-generic.cpp b/src/VBox/Runtime/generic/RTMpOnPair-generic.cpp
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+/* $Id: RTMpOnPair-generic.cpp $ */
+/** @file
+ * IPRT - RTMpOnPair, generic implementation using RTMpOnAll.
+ */
+
+/*
+ * Copyright (C) 2015-2023 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 "internal/iprt.h"
+#include <iprt/mp.h>
+
+#include <iprt/asm.h>
+#include <iprt/assert.h>
+#include <iprt/err.h>
+
+
+/*********************************************************************************************************************************
+* Structures and Typedefs *
+*********************************************************************************************************************************/
+/**
+ * Argument package for the generic RTMpOnPair implemenetation.
+ */
+typedef struct RTMPONPAIRGENERIC
+{
+ RTCPUID idCpu1;
+ RTCPUID idCpu2;
+ PFNRTMPWORKER pfnWorker;
+ void *pvUser1;
+ void *pvUser2;
+ /** Count of how many CPUs actually showed up. */
+ uint32_t volatile cPresent;
+} RTMPONPAIRGENERIC;
+/** Pointer to the an argument package for the generic RTMpOnPair
+ * implemenation. */
+typedef RTMPONPAIRGENERIC *PRTMPONPAIRGENERIC;
+
+
+/**
+ * @callback_method_impl{FNRTMPWORKER,
+ * Used by RTMpOnPair to call the worker on the two specified CPUs.}
+ */
+static DECLCALLBACK(void) rtMpOnPairGenericWorker(RTCPUID idCpu, void *pvUser1, void *pvUser2)
+{
+ RT_NOREF(pvUser2);
+ PRTMPONPAIRGENERIC pArgs = (PRTMPONPAIRGENERIC)pvUser1;
+
+ /*
+ * Only the two choosen CPUs should call the worker function, count how
+ * many of them that showed up.
+ */
+ if ( idCpu == pArgs->idCpu1
+ || idCpu == pArgs->idCpu2)
+ {
+ ASMAtomicIncU32(&pArgs->cPresent);
+ pArgs->pfnWorker(idCpu, pArgs->pvUser1, pArgs->pvUser2);
+ }
+}
+
+
+RTDECL(int) RTMpOnPair(RTCPUID idCpu1, RTCPUID idCpu2, uint32_t fFlags, PFNRTMPWORKER pfnWorker, void *pvUser1, void *pvUser2)
+{
+ int rc;
+ AssertReturn(idCpu1 != idCpu2, VERR_INVALID_PARAMETER);
+ AssertReturn(!(fFlags & RTMPON_F_VALID_MASK), VERR_INVALID_FLAGS);
+ if ((fFlags & RTMPON_F_CONCURRENT_EXEC) && !RTMpOnAllIsConcurrentSafe())
+ return VERR_NOT_SUPPORTED;
+
+ /*
+ * Check that both CPUs are online before doing the broadcast call.
+ */
+ if ( RTMpIsCpuOnline(idCpu1)
+ && RTMpIsCpuOnline(idCpu2))
+ {
+ RTMPONPAIRGENERIC Args;
+ Args.idCpu1 = idCpu1;
+ Args.idCpu2 = idCpu2;
+ Args.pfnWorker = pfnWorker;
+ Args.pvUser1 = pvUser1;
+ Args.pvUser2 = pvUser2;
+ Args.cPresent = 0;
+ rc = RTMpOnAll(rtMpOnPairGenericWorker, &Args, pvUser2);
+ if (RT_SUCCESS(rc))
+ {
+ /*
+ * Let's see if both of the CPUs showed up.
+ */
+ if (RT_LIKELY(Args.cPresent == 2))
+ { /* likely */ }
+ else if (Args.cPresent == 0)
+ rc = VERR_CPU_OFFLINE;
+ else if (Args.cPresent == 1)
+ rc = VERR_NOT_ALL_CPUS_SHOWED;
+ else
+ {
+ rc = VERR_CPU_IPE_1;
+ AssertMsgFailed(("cPresent=%#x\n", Args.cPresent));
+ }
+ }
+ }
+ /*
+ * A CPU must be present to be considered just offline.
+ */
+ else if ( RTMpIsCpuPresent(idCpu1)
+ && RTMpIsCpuPresent(idCpu2))
+ rc = VERR_CPU_OFFLINE;
+ else
+ rc = VERR_CPU_NOT_FOUND;
+ return rc;
+}
+
+
+RTDECL(bool) RTMpOnPairIsConcurrentExecSupported(void)
+{
+ return RTMpOnAllIsConcurrentSafe();
+}
+