[libvirt] [PATCH 5/5] qemu: Implement virConnectGetEmulatorCapabilities
Michal Privoznik
mprivozn at redhat.com
Fri Jun 20 14:19:10 UTC 2014
The commit produces this nice output:
virsh # emulatorcaps /usr/bin/qemu-system-x86_64 kvm pc-1.3
<emulatorCapabilities>
<path>/usr/bin/qemu-system-x86_64</path>
<domain>kvm</domain>
<machine>pc-1.3</machine>
<arch>x86_64</arch>
<vcpu>255</vcpu>
<devices>
<hostdev>
<driver>
<enum name='driver'>
<value>kvm</value>
<value>vfio</value>
</enum>
</driver>
</hostdev>
</devices>
</emulatorCapabilities>
Signed-off-by: Michal Privoznik <mprivozn at redhat.com>
---
docs/formatemulatorcaps.html.in | 63 +++++++++++++++
docs/schemas/emulatorcapability.rng | 49 ++++++++++++
src/libvirt_private.syms | 1 +
src/qemu/qemu_capabilities.c | 78 ++++++++++--------
src/qemu/qemu_capabilities.h | 3 +
src/qemu/qemu_capabilitiespriv.h | 55 +++++++++++++
src/qemu/qemu_driver.c | 92 ++++++++++++++++++++++
tests/Makefile.am | 18 +++++
.../viremulatorcaps-qemu-kvm-vfio.xml | 17 ++++
tests/viremulatorcapabilitiestest.c | 72 ++++++++++++++++-
tests/virhostdevmock.c | 40 ++++++++++
11 files changed, 456 insertions(+), 32 deletions(-)
create mode 100644 src/qemu/qemu_capabilitiespriv.h
create mode 100644 tests/viremulatorcapabilitiesdata/viremulatorcaps-qemu-kvm-vfio.xml
create mode 100644 tests/virhostdevmock.c
diff --git a/docs/formatemulatorcaps.html.in b/docs/formatemulatorcaps.html.in
index beea1a9..ba87ff1 100644
--- a/docs/formatemulatorcaps.html.in
+++ b/docs/formatemulatorcaps.html.in
@@ -48,5 +48,68 @@
<dd>The domain's <a href="formatdomain.html#elementsOSBIOS">machine
type</a>.</dd>
</dl>
+
+ <p>Besides these three elements, depending on the hypervisor and the driver
+ used other elements may occur. For example:</p>
+<pre>
+<arch>x86_64</arch>
+<vcpu>255</vcpu>
+<devices/>
+</pre>
+ <p>Where:</p>
+ <dl>
+ <dt>arch</dt>
+ <dd>Denotes the <a
+ href="formatdomain.html#elementsOSBIOS">architecture</a> of the
+ domain.</dd>
+
+ <dt>vcpu</dt>
+ <dd>Tells the maximum virtual CPU count supported by the underlying
+ hypervisor.</dd>
+
+ <dt>devices</dt>
+ <dd>Contains info on supported <a href="#elementsDevices">devices</a> features</dd>
+ </dl>
+
+ <h3><a name="elementsDevices">Devices</a></h3>
+ <p>The final set of XML elements is used to describe device capabilities
+ with respect to the hypervisor and host capabilities. For example:</p>
+<pre>
+<devices>
+ <hostdev>
+ <driver>
+ <enum name='driver'>
+ <value>kvm</value>
+ <value>vfio</value>
+ </enum>
+ </driver>
+ </hostdev>
+</devices>
+</pre>
+ <p>The aim is to keep the element names as consistent with <a
+ href="formatdomain.html">domain element names</a> as possible.</p>
+
+ <h4><a name="elementsHostDev">Host device assignment</a></h4>
+ <p>When deciding on the most suitable device passthrough mode, look into
+ this part of the XML document. For instance, in the following snippet both
+ VFIO and legacy KVM passthrough are supported:</p>
+<pre>
+<devices>
+ <hostdev>
+ <driver>
+ <enum name='driver'>
+ <value>kvm</value>
+ <value>vfio</value>
+ </enum>
+ </driver>
+ </hostdev>
+</devices>
+</pre>
+
+ <p>The <code>hostdev</code> element can contain the following elements:</p>
+ <dl>
+ <dt><code>driver</code></dt>
+ <dd>Here are the information on hostdev driver gathered.</dd>
+ </dl>
</body>
</html>
diff --git a/docs/schemas/emulatorcapability.rng b/docs/schemas/emulatorcapability.rng
index 2548cef..0c4a0cb 100644
--- a/docs/schemas/emulatorcapability.rng
+++ b/docs/schemas/emulatorcapability.rng
@@ -20,7 +20,56 @@
<element name='machine'>
<text/>
</element>
+ <optional>
+ <element name='arch'>
+ <text/>
+ </element>
+ <element name='vcpu'>
+ <ref name='unsignedInt'/>
+ </element>
+ <ref name='devices'/>
+ </optional>
</interleave>
</element>
</define>
+
+ <define name='devices'>
+ <element name='devices'>
+ <interleave>
+ <ref name='hostdev'/>
+ </interleave>
+ </element>
+ </define>
+
+ <define name='hostdev'>
+ <element name='hostdev'>
+ <interleave>
+ <ref name='driver'/>
+ </interleave>
+ </element>
+ </define>
+
+ <define name='driver'>
+ <element name='driver'>
+ <interleave>
+ <ref name='enum-driver'/>
+ </interleave>
+ </element>
+ </define>
+
+ <define name='enum-driver'>
+ <element name='enum'>
+ <attribute name='name'>
+ <value>driver</value>
+ </attribute>
+ <zeroOrMore>
+ <element name='value'>
+ <choice>
+ <value>kvm</value>
+ <value>vfio</value>
+ </choice>
+ </element>
+ </zeroOrMore>
+ </element>
+ </define>
</grammar>
diff --git a/src/libvirt_private.syms b/src/libvirt_private.syms
index 2784610..68ad1c7 100644
--- a/src/libvirt_private.syms
+++ b/src/libvirt_private.syms
@@ -426,6 +426,7 @@ virDomainVideoTypeFromString;
virDomainVideoTypeToString;
virDomainVirtioEventIdxTypeFromString;
virDomainVirtioEventIdxTypeToString;
+virDomainVirtTypeFromString;
virDomainVirtTypeToString;
virDomainWatchdogActionTypeFromString;
virDomainWatchdogActionTypeToString;
diff --git a/src/qemu/qemu_capabilities.c b/src/qemu/qemu_capabilities.c
index 245d6b5..68828e3 100644
--- a/src/qemu/qemu_capabilities.c
+++ b/src/qemu/qemu_capabilities.c
@@ -24,6 +24,7 @@
#include <config.h>
#include "qemu_capabilities.h"
+#include "qemu_capabilitiespriv.h"
#include "viralloc.h"
#include "vircrypto.h"
#include "virlog.h"
@@ -39,6 +40,7 @@
#include "virnodesuspend.h"
#include "qemu_monitor.h"
#include "virstring.h"
+#include "virhostdev.h"
#include <fcntl.h>
#include <sys/stat.h>
@@ -259,37 +261,6 @@ VIR_ENUM_IMPL(virQEMUCaps, QEMU_CAPS_LAST,
);
-/*
- * Update the XML parser/formatter when adding more
- * information to this struct so that it gets cached
- * correctly. It does not have to be ABI-stable, as
- * the cache will be discarded & repopulated if the
- * timestamp on the libvirtd binary changes.
- */
-struct _virQEMUCaps {
- virObject object;
-
- bool usedQMP;
-
- char *binary;
- time_t ctime;
-
- virBitmapPtr flags;
-
- unsigned int version;
- unsigned int kvmVersion;
-
- virArch arch;
-
- size_t ncpuDefinitions;
- char **cpuDefinitions;
-
- size_t nmachineTypes;
- char **machineTypes;
- char **machineAliases;
- unsigned int *machineMaxCpus;
-};
-
struct _virQEMUCapsCache {
virMutex lock;
virHashTablePtr binaries;
@@ -3509,3 +3480,48 @@ virQEMUCapsSupportsChardev(virDomainDefPtr def,
(chr->deviceType == VIR_DOMAIN_CHR_DEVICE_TYPE_CONSOLE &&
chr->targetType == VIR_DOMAIN_CHR_CONSOLE_TARGET_TYPE_VIRTIO));
}
+
+int
+virQEMUCapsFormatBuf(virBufferPtr buf,
+ void *opaque,
+ const char *machine)
+{
+ virQEMUCapsPtr qemuCaps = (virQEMUCapsPtr) opaque;
+ bool hostkvm = virHostdevHostSupportsPassthroughLegacy();
+ bool hostvfio = virHostdevHostSupportsPassthroughVFIO();
+ bool qemukvm = virQEMUCapsGet(qemuCaps, QEMU_CAPS_PCIDEVICE) ||
+ virQEMUCapsGet(qemuCaps, QEMU_CAPS_DEVICE);
+ bool qemuvfio = virQEMUCapsGet(qemuCaps, QEMU_CAPS_DEVICE_VFIO_PCI);
+ int maxcpus = virQEMUCapsGetMachineMaxCpus(qemuCaps, machine);
+
+ virBufferAsprintf(buf, "<arch>%s</arch>\n", virArchToString(qemuCaps->arch));
+
+ if (maxcpus > 0)
+ virBufferAsprintf(buf, "<vcpu>%d</vcpu>\n", maxcpus);
+
+ /* So far we want to print the rest iff both host and qemu support kvm/vfio */
+ if (!((hostkvm && qemukvm) || (hostvfio && qemuvfio)))
+ return 0;
+
+ virBufferAddLit(buf, "<devices>\n");
+ virBufferAdjustIndent(buf, 2);
+ virBufferAddLit(buf, "<hostdev>\n");
+ virBufferAdjustIndent(buf, 2);
+ virBufferAddLit(buf, "<driver>\n");
+ virBufferAdjustIndent(buf, 2);
+ virBufferAddLit(buf, "<enum name='driver'>\n");
+ virBufferAdjustIndent(buf, 2);
+ if (hostkvm && qemukvm)
+ virBufferAddLit(buf, "<value>kvm</value>\n");
+ if (hostvfio && qemuvfio)
+ virBufferAddLit(buf, "<value>vfio</value>\n");
+ virBufferAdjustIndent(buf, -2);
+ virBufferAddLit(buf, "</enum>\n");
+ virBufferAdjustIndent(buf, -2);
+ virBufferAddLit(buf, "</driver>\n");
+ virBufferAdjustIndent(buf, -2);
+ virBufferAddLit(buf, "</hostdev>\n");
+ virBufferAdjustIndent(buf, -2);
+ virBufferAddLit(buf, "</devices>\n");
+ return 0;
+}
diff --git a/src/qemu/qemu_capabilities.h b/src/qemu/qemu_capabilities.h
index d755caa..121d1ba 100644
--- a/src/qemu/qemu_capabilities.h
+++ b/src/qemu/qemu_capabilities.h
@@ -307,4 +307,7 @@ int virQEMUCapsInitGuestFromBinary(virCapsPtr caps,
virQEMUCapsPtr kvmbinCaps,
virArch guestarch);
+int virQEMUCapsFormatBuf(virBufferPtr buf,
+ void *opaque,
+ const char *machine);
#endif /* __QEMU_CAPABILITIES_H__*/
diff --git a/src/qemu/qemu_capabilitiespriv.h b/src/qemu/qemu_capabilitiespriv.h
new file mode 100644
index 0000000..9ed6853
--- /dev/null
+++ b/src/qemu/qemu_capabilitiespriv.h
@@ -0,0 +1,55 @@
+/*
+ * qemu_capabilitiespriv.h: private declarations for QEMU capabilities
+ *
+ * Copyright (C) 2014 Red Hat, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library. If not, see
+ * <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef __QEMU_CAPABILITIESPRIV_H__
+# define __QEMU_CAPABILITIESPRIV_H__
+
+/*
+ * Update the XML parser/formatter when adding more
+ * information to this struct so that it gets cached
+ * correctly. It does not have to be ABI-stable, as
+ * the cache will be discarded & repopulated if the
+ * timestamp on the libvirtd binary changes.
+ */
+struct _virQEMUCaps {
+ virObject object;
+
+ bool usedQMP;
+
+ char *binary;
+ time_t ctime;
+
+ virBitmapPtr flags;
+
+ unsigned int version;
+ unsigned int kvmVersion;
+
+ virArch arch;
+
+ size_t ncpuDefinitions;
+ char **cpuDefinitions;
+
+ size_t nmachineTypes;
+ char **machineTypes;
+ char **machineAliases;
+ unsigned int *machineMaxCpus;
+};
+
+#endif /* __QEMU_CAPABILITIESPRIV_H__*/
diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
index ac6aee5..b449770 100644
--- a/src/qemu/qemu_driver.c
+++ b/src/qemu/qemu_driver.c
@@ -95,6 +95,7 @@
#include "viraccessapicheckqemu.h"
#include "storage/storage_driver.h"
#include "virhostdev.h"
+#include "viremulator_capabilities.h"
#define VIR_FROM_THIS VIR_FROM_QEMU
@@ -16897,6 +16898,96 @@ qemuNodeGetFreePages(virConnectPtr conn,
}
+static char *
+qemuConnectGetEmulatorCapabilities(virConnectPtr conn,
+ const char *emulatorbin,
+ const char *machine,
+ const char *virttype_str,
+ unsigned int flags)
+{
+ char *ret = NULL;
+ virQEMUDriverPtr driver = conn->privateData;
+ virQEMUCapsPtr qemuCaps = NULL;
+ virEmulatorCapabilitiesPtr emulCaps = NULL;
+ int virttype; /* virDomainVirtType */
+ size_t ncanonicalMachine, i;
+ const char **canonicalMachine;
+
+ virCheckFlags(0, ret);
+ virCheckNonNullArgGoto(emulatorbin, cleanup);
+ virCheckNonNullArgGoto(virttype_str, cleanup);
+
+ if (virConnectGetEmulatorCapabilitiesEnsureACL(conn) < 0)
+ goto cleanup;
+
+ if ((virttype = virDomainVirtTypeFromString(virttype_str)) < 0) {
+ virReportError(VIR_ERR_INVALID_ARG,
+ _("unknown virttype: %s"), virttype_str);
+ goto cleanup;
+ }
+
+ if (!(qemuCaps = virQEMUCapsCacheLookup(driver->qemuCapsCache,
+ emulatorbin)))
+ goto cleanup;
+
+ if (machine) {
+ const char *machine_tmp;
+
+ if (!(machine_tmp = virQEMUCapsGetCanonicalMachine(qemuCaps,
+ machine))) {
+ /* This should never ever happen (TM) */
+ virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
+ _("an error that should never "
+ "ever happen just occurred"));
+ goto cleanup;
+ }
+ machine = machine_tmp;
+ }
+
+ /* The virQEMUCapsGetMachineTypes expects char *** but we want to stress
+ * the fact that we are not going to change machine types array, so we are
+ * using const char *** */
+ if (!(ncanonicalMachine = virQEMUCapsGetMachineTypes(qemuCaps,
+ (char ***) &canonicalMachine))) {
+ virReportError(VIR_ERR_INVALID_ARG,
+ _(" emulator doesn't support any machines: %s"),
+ emulatorbin);
+ goto cleanup;
+ }
+
+ if (machine) {
+ for (i = 0; i < ncanonicalMachine; i++) {
+ if (STREQ(machine, canonicalMachine[i]))
+ break;
+ }
+
+ if (i == ncanonicalMachine) {
+ virReportError(VIR_ERR_INVALID_ARG,
+ _("the machine '%s' is not supported by emulator '%s'"),
+ machine, emulatorbin);
+ goto cleanup;
+ }
+ } else {
+ /* The default machine type is at the first position */
+ machine = canonicalMachine[0];
+ }
+
+ if (!(emulCaps = virEmulatorCapabilitiesNew(emulatorbin,
+ machine,
+ virttype)))
+ goto cleanup;
+
+ virEmulatorCapabilitiesSetPrivate(emulCaps, qemuCaps, virQEMUCapsFormatBuf);
+
+ ret = virEmulatorCapabilitiesFormat(emulCaps);
+
+ cleanup:
+ virObjectUnref(emulCaps);
+ virObjectUnref(qemuCaps);
+ return ret;
+}
+
+
static virDriver qemuDriver = {
.no = VIR_DRV_QEMU,
.name = QEMU_DRIVER_NAME,
@@ -17092,6 +17183,7 @@ static virDriver qemuDriver = {
.domainGetTime = qemuDomainGetTime, /* 1.2.5 */
.domainSetTime = qemuDomainSetTime, /* 1.2.5 */
.nodeGetFreePages = qemuNodeGetFreePages, /* 1.2.6 */
+ .connectGetEmulatorCapabilities = qemuConnectGetEmulatorCapabilities, /* 1.2.6 */
};
diff --git a/tests/Makefile.am b/tests/Makefile.am
index e7d9f94..fcd65b5 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -388,6 +388,9 @@ if WITH_QEMU
test_libraries += libqemumonitortestutils.la \
qemuxml2argvmock.la \
$(NULL)
+if WITH_LINUX
+test_libraries += virhostdevmock.la
+endif WITH_LINUX
endif WITH_QEMU
if WITH_BHYVE
@@ -831,6 +834,21 @@ vircaps2xmltest_LDADD = $(LDADDS)
viremulatorcapabilitiestest_SOURCES = \
viremulatorcapabilitiestest.c testutils.h testutils.c
viremulatorcapabilitiestest_LDADD = $(LDADDS)
+if WITH_QEMU
+viremulatorcapabilitiestest_LDADD += $(qemu_LDADDS)
+endif WITH_QEMU
+
+if WITH_LINUX
+virhostdevmock_la_SOURCES = \
+ virhostdevmock.c
+virhostdevmock_la_CFLAGS = $(AM_CFLAGS)
+virhostdevmock_la_LIBADD = $(GNULIB_LIBS) \
+ ../src/libvirt.la
+virhostdevmock_la_LDFLAGS = -module -avoid-version \
+ -rpath /evil/libtool/hack/to/force/shared/lib/creation
+else ! WITH_LINUX
+ EXTRA_DIST += virhostdevmock.c
+endif ! WITH_LINUX
if WITH_LIBVIRTD
libvirtdconftest_SOURCES = \
diff --git a/tests/viremulatorcapabilitiesdata/viremulatorcaps-qemu-kvm-vfio.xml b/tests/viremulatorcapabilitiesdata/viremulatorcaps-qemu-kvm-vfio.xml
new file mode 100644
index 0000000..e1d4bab
--- /dev/null
+++ b/tests/viremulatorcapabilitiesdata/viremulatorcaps-qemu-kvm-vfio.xml
@@ -0,0 +1,17 @@
+<emulatorCapabilities>
+ <path>/usr/bin/qemu-system-x86_64</path>
+ <domain>kvm</domain>
+ <machine>pc-i440fx-2.1</machine>
+ <arch>x86_64</arch>
+ <vcpu>255</vcpu>
+ <devices>
+ <hostdev>
+ <driver>
+ <enum name='driver'>
+ <value>kvm</value>
+ <value>vfio</value>
+ </enum>
+ </driver>
+ </hostdev>
+ </devices>
+</emulatorCapabilities>
diff --git a/tests/viremulatorcapabilitiestest.c b/tests/viremulatorcapabilitiestest.c
index 448f0cf..25076a7 100644
--- a/tests/viremulatorcapabilitiestest.c
+++ b/tests/viremulatorcapabilitiestest.c
@@ -24,7 +24,8 @@
#include "testutils.h"
#include "viremulator_capabilities.h"
-
+#include "qemu/qemu_capabilities.h"
+#include "qemu/qemu_capabilitiespriv.h"
#define VIR_FROM_THIS VIR_FROM_NONE
@@ -96,11 +97,50 @@ test_virEmulatorCapabilitiesFormat(const void *opaque)
return ret;
}
+static virQEMUCapsPtr
+buildQEMUCaps(void)
+{
+ virQEMUCapsPtr qemuCaps = NULL;
+
+ if (!(qemuCaps = virQEMUCapsNew()))
+ return NULL;
+
+ if (VIR_ALLOC_N(qemuCaps->machineTypes, 1) < 0 ||
+ VIR_ALLOC_N(qemuCaps->machineAliases, 1) < 0 ||
+ VIR_ALLOC_N(qemuCaps->machineMaxCpus, 1) < 0)
+ goto error;
+
+ if (VIR_STRDUP(qemuCaps->machineTypes[0], "pc-i440fx-2.1") < 0 ||
+ VIR_STRDUP(qemuCaps->machineAliases[0], "pc") < 0)
+ goto error;
+ qemuCaps->machineMaxCpus[0] = 255;
+ qemuCaps->nmachineTypes++;
+
+ qemuCaps->arch = VIR_ARCH_X86_64;
+
+ virQEMUCapsSet(qemuCaps, QEMU_CAPS_PCIDEVICE);
+ virQEMUCapsSet(qemuCaps, QEMU_CAPS_DEVICE_VFIO_PCI);
+
+ return qemuCaps;
+ error:
+ virObjectUnref(qemuCaps);
+ return NULL;
+}
+
static int
mymain(void)
{
int ret = 0;
+#ifdef WITH_QEMU
+ virQEMUCapsPtr qemuCaps;
+
+ if (!(qemuCaps = buildQEMUCaps())) {
+ fprintf(stderr, "unable to build QEMU capabilities\n");
+ return EXIT_FAILURE;
+ }
+#endif
+
#define DO_TEST(Filename, Emulatorbin, Machine, Type, ...) \
do { \
struct test_virEmulatorCapabilitiesFormatData data = {.filename = Filename, \
@@ -109,9 +149,39 @@ mymain(void)
ret = -1; \
} while (0)
+#ifdef WITH_QEMU
+# define DO_TEST_QEMU(Filename, Emulatorbin, Machine, Type, ...) \
+ do { \
+ struct test_virEmulatorCapabilitiesFormatData data = {.filename = Filename, \
+ .emulatorbin = Emulatorbin, .machine = Machine, .type = Type, \
+ .privateData = qemuCaps, .formatFunc = virQEMUCapsFormatBuf, __VA_ARGS__}; \
+ if (virtTestRun(Filename, test_virEmulatorCapabilitiesFormat, &data) < 0) \
+ ret = -1; \
+ } while (0)
+#endif
+
DO_TEST("basic", "/bin/emulatorbin", "my-machine-type", VIR_DOMAIN_VIRT_UML);
+#ifdef WITH_QEMU
+ /* In the following test we are expecting host to support both KVM and
+ * VFIO. However, this is something we must mock and therefore the test can
+ * be run on the Linux platform only. */
+# ifdef __linux__
+ DO_TEST_QEMU("qemu-kvm-vfio", "/usr/bin/qemu-system-x86_64",
+ "pc-i440fx-2.1", VIR_DOMAIN_VIRT_KVM);
+# else
+# error Port me
+# endif
+#endif
+
+#ifdef WITH_QEMU
+ virObjectUnref(qemuCaps);
+#endif
return ret;
}
+#ifdef __linux__
+VIRT_TEST_MAIN_PRELOAD(mymain, abs_builddir "/.libs/virhostdevmock.so")
+#else
VIRT_TEST_MAIN(mymain)
+#endif
diff --git a/tests/virhostdevmock.c b/tests/virhostdevmock.c
new file mode 100644
index 0000000..cb08034
--- /dev/null
+++ b/tests/virhostdevmock.c
@@ -0,0 +1,40 @@
+/*
+ * Copyright (C) 2014 Red Hat, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library. If not, see
+ * <http://www.gnu.org/licenses/>.
+ *
+ * Author: Michal Privoznik <mprivozn at redhat.com>
+ */
+
+#include <config.h>
+
+#ifdef __linux__
+# include "virhostdev.h"
+
+bool
+virHostdevHostSupportsPassthroughLegacy(void)
+{
+ return true;
+}
+
+bool
+virHostdevHostSupportsPassthroughVFIO(void)
+{
+ return true;
+}
+
+#else
+/* Nothing to override on non-__linux__ platforms */
+#endif
--
1.8.5.5
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