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9139b46a6b
This looks for existance of DMAR (Intel) and IVRS (AMD) files under /sys/firmware/acpi/tables/, as a sign that the platform has IOMMU present & enabled in the BIOS. If these are present and /sys/kernel/iommu_groups does not contain any entries this is taken as a sign that the kernel has not enabled the IOMMU currently. If no ACPI tables are found we can't distinguish between disabled in BIOS and not present in the hardware, so we have to give the user a generic hint. Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
98 lines
3.8 KiB
C
98 lines
3.8 KiB
C
/*
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* virt-host-validate-qemu.c: Sanity check a QEMU hypervisor host
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*
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* Copyright (C) 2012 Red Hat, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see
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* <http://www.gnu.org/licenses/>.
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*
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*/
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#include <config.h>
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#include <unistd.h>
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#include "virt-host-validate-qemu.h"
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#include "virt-host-validate-common.h"
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int virHostValidateQEMU(void)
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{
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int ret = 0;
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virHostMsgCheck("QEMU", "%s", ("for hardware virtualization"));
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if (virHostValidateHasCPUFlag("svm") ||
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virHostValidateHasCPUFlag("vmx")) {
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virHostMsgPass();
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if (virHostValidateDeviceExists("QEMU", "/dev/kvm",
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VIR_HOST_VALIDATE_FAIL,
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_("Check that the 'kvm-intel' or 'kvm-amd' modules are "
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"loaded & the BIOS has enabled virtualization")) < 0)
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ret = -1;
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else if (virHostValidateDeviceAccessible("QEMU", "/dev/kvm",
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VIR_HOST_VALIDATE_FAIL,
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_("Check /dev/kvm is world writable or you are in "
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"a group that is allowed to access it")) < 0)
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ret = -1;
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} else {
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virHostMsgFail(VIR_HOST_VALIDATE_WARN,
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_("Only emulated CPUs are available, performance will be significantly limited"));
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}
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if (virHostValidateDeviceExists("QEMU", "/dev/vhost-net",
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VIR_HOST_VALIDATE_WARN,
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_("Load the 'vhost_net' module to improve performance "
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"of virtio networking")) < 0)
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ret = -1;
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if (virHostValidateDeviceExists("QEMU", "/dev/net/tun",
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VIR_HOST_VALIDATE_FAIL,
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_("Load the 'tun' module to enable networking for QEMU guests")) < 0)
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ret = -1;
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if (virHostValidateCGroupController("QEMU", "memory",
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VIR_HOST_VALIDATE_WARN,
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"MEMCG") < 0)
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ret = -1;
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if (virHostValidateCGroupController("QEMU", "cpu",
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VIR_HOST_VALIDATE_WARN,
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"CGROUP_CPU") < 0)
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ret = -1;
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if (virHostValidateCGroupController("QEMU", "cpuacct",
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VIR_HOST_VALIDATE_WARN,
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"CGROUP_CPUACCT") < 0)
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ret = -1;
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if (virHostValidateCGroupController("QEMU", "devices",
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VIR_HOST_VALIDATE_WARN,
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"CGROUP_DEVICES") < 0)
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ret = -1;
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if (virHostValidateCGroupController("QEMU", "net_cls",
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VIR_HOST_VALIDATE_WARN,
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"NET_CLS_CGROUP") < 0)
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ret = -1;
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if (virHostValidateCGroupController("QEMU", "blkio",
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VIR_HOST_VALIDATE_WARN,
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"BLK_CGROUP") < 0)
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ret = -1;
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if (virHostValidateIOMMU("QEMU",
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VIR_HOST_VALIDATE_WARN) < 0)
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ret = -1;
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return ret;
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}
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