mirror of
https://gitlab.com/libvirt/libvirt.git
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0f4d7daa8c
This removes code duplication and simplifies cgroup detection. As a drawback we will not have separate messages to enable cgroup controller in kernel or to mount it. On the other side the rewrite adds support for cgroup v2. The kernel config support was wrong because it was parsing '/proc/self/cgroup' instead of '/proc/cgroups/' file. The mount suggestion is removed as well because it will not work with cgroup v2. Signed-off-by: Pavel Hrdina <phrdina@redhat.com>
117 lines
4.2 KiB
C
117 lines
4.2 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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#include "virarch.h"
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#include "virbitmap.h"
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#include "vircgroup.h"
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int virHostValidateQEMU(void)
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{
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virBitmapPtr flags;
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int ret = 0;
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bool hasHwVirt = false;
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bool hasVirtFlag = false;
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virArch arch = virArchFromHost();
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const char *kvmhint = _("Check that CPU and firmware supports virtualization "
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"and kvm module is loaded");
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if (!(flags = virHostValidateGetCPUFlags()))
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return -1;
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switch ((int)arch) {
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case VIR_ARCH_I686:
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case VIR_ARCH_X86_64:
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hasVirtFlag = true;
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kvmhint = _("Check that the 'kvm-intel' or 'kvm-amd' modules are "
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"loaded & the BIOS has enabled virtualization");
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if (virBitmapIsBitSet(flags, VIR_HOST_VALIDATE_CPU_FLAG_SVM) ||
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virBitmapIsBitSet(flags, VIR_HOST_VALIDATE_CPU_FLAG_VMX))
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hasHwVirt = true;
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break;
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case VIR_ARCH_S390:
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case VIR_ARCH_S390X:
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hasVirtFlag = true;
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if (virBitmapIsBitSet(flags, VIR_HOST_VALIDATE_CPU_FLAG_SIE))
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hasHwVirt = true;
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break;
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default:
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hasHwVirt = false;
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}
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if (hasVirtFlag) {
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virHostMsgCheck("QEMU", "%s", _("for hardware virtualization"));
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if (hasHwVirt) {
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virHostMsgPass();
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} else {
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virHostMsgFail(VIR_HOST_VALIDATE_FAIL,
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_("Only emulated CPUs are available, performance will be significantly limited"));
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ret = -1;
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}
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}
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if (hasHwVirt || !hasVirtFlag) {
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if (virHostValidateDeviceExists("QEMU", "/dev/kvm",
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VIR_HOST_VALIDATE_FAIL,
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kvmhint) <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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}
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virBitmapFree(flags);
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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 (virHostValidateCGroupControllers("QEMU",
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(1 << VIR_CGROUP_CONTROLLER_MEMORY) |
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(1 << VIR_CGROUP_CONTROLLER_CPU) |
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(1 << VIR_CGROUP_CONTROLLER_CPUACCT) |
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(1 << VIR_CGROUP_CONTROLLER_CPUSET) |
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(1 << VIR_CGROUP_CONTROLLER_DEVICES) |
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(1 << VIR_CGROUP_CONTROLLER_BLKIO),
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VIR_HOST_VALIDATE_WARN) < 0) {
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ret = -1;
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}
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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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