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qemu: Add capability for vhost-user multiqueue

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The support for this was added in QEMU with commit
830d70db692e374b55555f4407f96a1ceefdcc97.  Unfortunately we have to do
another ugly version-based capability check.  The other option would be
not to check for the capability at all and leave that to qemu as it's
done with multiqueue tap devices.

Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
This commit is contained in:
Martin Kletzander 2015-06-04 11:37:37 +02:00
parent e7f5510ef2
commit 7971723b98
2 changed files with 8 additions and 0 deletions
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7
src/qemu/qemu_capabilities.c
View File

@ -285,6 +285,8 @@ VIR_ENUM_IMPL(virQEMUCaps, QEMU_CAPS_LAST,
"dea-key-wrap",
"pci-serial",
"aarch64-off",
"vhost-user-multiq", /* 190 */
);
@ -3308,6 +3310,11 @@ virQEMUCapsInitQMPMonitor(virQEMUCapsPtr qemuCaps,
qemuCaps->version >= 2003000)
virQEMUCapsSet(qemuCaps, QEMU_CAPS_CPU_AARCH64_OFF);
/* vhost-user supports multi-queue from v2.4.0 onwards,
* but there is no way to query for that capability */
if (qemuCaps->version >= 2004000)
virQEMUCapsSet(qemuCaps, QEMU_CAPS_VHOSTUSER_MULTIQ);
if (virQEMUCapsProbeQMPCommands(qemuCaps, mon) < 0)
goto cleanup;
if (virQEMUCapsProbeQMPEvents(qemuCaps, mon) < 0)

1
src/qemu/qemu_capabilities.h
View File

@ -229,6 +229,7 @@ typedef enum {
QEMU_CAPS_DEA_KEY_WRAP = 187, /* -machine dea_key_wrap */
QEMU_CAPS_DEVICE_PCI_SERIAL = 188, /* -device pci-serial */
QEMU_CAPS_CPU_AARCH64_OFF = 189, /* -cpu ...,aarch64=off */
QEMU_CAPS_VHOSTUSER_MULTIQ = 190, /* vhost-user with -netdev queues= */
QEMU_CAPS_LAST, /* this must always be the last item */
} virQEMUCapsFlags;