[libvirt PATCH v2 1/5] add QEMU_CAPS_TCG_DISABLED and probe conditionally
Only probe QEMU binary with accel=tcg if TCG is not disabled.
Similarly, only add a VIR_DOMAIN_VIRT_QEMU guest if TCG
is available.
Signed-off-by: Tobin Feldman-Fitzthum <tobin(a)linux.vnet.ibm.com>
---
src/qemu/qemu_capabilities.c | 22 ++++++++++++++--------
src/qemu/qemu_capabilities.h | 1 +
2 files changed, 15 insertions(+), 8 deletions(-)
diff --git a/src/qemu/qemu_capabilities.c b/src/qemu/qemu_capabilities.c
index a95a60c36a..61123f0e63 100644
--- a/src/qemu/qemu_capabilities.c
+++ b/src/qemu/qemu_capabilities.c
@@ -567,6 +567,7 @@ VIR_ENUM_IMPL(virQEMUCaps,
"query-named-block-nodes.flat",
"blockdev-snapshot.allow-write-only-overlay",
"blockdev-reopen",
+ "tcg-disabled",
);
@@ -1008,13 +1009,16 @@ virQEMUCapsInitGuestFromBinary(virCapsPtr caps,
virCapabilitiesAddGuestFeatureWithToggle(guest,
VIR_CAPS_GUEST_FEATURE_TYPE_DISKSNAPSHOT,
true, false);
- if (virCapabilitiesAddGuestDomain(guest,
- VIR_DOMAIN_VIRT_QEMU,
- NULL,
- NULL,
- 0,
- NULL) == NULL)
- goto cleanup;
+ if (!virQEMUCapsGet(qemuCaps, QEMU_CAPS_TCG_DISABLED)) {
+ if (virCapabilitiesAddGuestDomain(guest,
+ VIR_DOMAIN_VIRT_QEMU,
+ NULL,
+ NULL,
+ 0,
+ NULL) == NULL) {
+ goto cleanup;
+ }
+ }
if (virQEMUCapsGet(qemuCaps, QEMU_CAPS_KVM)) {
if (virCapabilitiesAddGuestDomain(guest,
@@ -2274,7 +2278,8 @@ bool
virQEMUCapsIsVirtTypeSupported(virQEMUCapsPtr qemuCaps,
virDomainVirtType virtType)
{
- if (virtType == VIR_DOMAIN_VIRT_QEMU)
+ if (virtType == VIR_DOMAIN_VIRT_QEMU &&
+ !virQEMUCapsGet(qemuCaps, QEMU_CAPS_TCG_DISABLED))
return true;
if (virtType == VIR_DOMAIN_VIRT_KVM &&
@@ -5123,6 +5128,7 @@ virQEMUCapsInitQMP(virQEMUCapsPtr qemuCaps,
* off.
*/
if (virQEMUCapsGet(qemuCaps, QEMU_CAPS_KVM) &&
+ !virQEMUCapsGet(qemuCaps, QEMU_CAPS_TCG_DISABLED) &&
virQEMUCapsInitQMPSingle(qemuCaps, libDir, runUid, runGid, true) < 0)
return -1;
diff --git a/src/qemu/qemu_capabilities.h b/src/qemu/qemu_capabilities.h
index f0961e273c..372806f585 100644
--- a/src/qemu/qemu_capabilities.h
+++ b/src/qemu/qemu_capabilities.h
@@ -548,6 +548,7 @@ typedef enum { /* virQEMUCapsFlags grouping marker for syntax-check
*/
QEMU_CAPS_QMP_QUERY_NAMED_BLOCK_NODES_FLAT, /* query-named-block-nodes supports the
'flat' option */
QEMU_CAPS_BLOCKDEV_SNAPSHOT_ALLOW_WRITE_ONLY, /* blockdev-snapshot has the
'allow-write-only-overlay' feature */
QEMU_CAPS_BLOCKDEV_REOPEN, /* 'blockdev-reopen' qmp command is supported */
+ QEMU_CAPS_TCG_DISABLED, /* QEMU does not support TCG */
QEMU_CAPS_LAST /* this must always be the last item */
} virQEMUCapsFlags;
--
2.20.1 (Apple Git-117)