[libvirt] [PATCH v2 2/4] qemu: caps: add QEMU_CAPS_QCOW2_L2_CACHE_SIZE

For qemu capable of setting l2-cache-size for qcow2 images to INT64_MAX and semantics of upper limit on l2 cache size. We can only check this by qemu version (3.1.0) now. Signed-off-by: Nikolay Shirokovskiy <nshirokovskiy(a)virtuozzo.com&gt; --- src/qemu/qemu_capabilities.c | 5 +++++ src/qemu/qemu_capabilities.h | 1 + 2 files changed, 6 insertions(+) diff --git a/src/qemu/qemu_capabilities.c b/src/qemu/qemu_capabilities.c index 2ca5af3..49a3b60 100644 --- a/src/qemu/qemu_capabilities.c +++ b/src/qemu/qemu_capabilities.c @@ -509,6 +509,7 @@ VIR_ENUM_IMPL(virQEMUCaps, QEMU_CAPS_LAST, "vfio-pci.display", "blockdev", "vfio-ap", + "qcow2.l2-cache-size", ); @@ -4117,6 +4118,10 @@ virQEMUCapsInitQMPMonitor(virQEMUCapsPtr qemuCaps, virQEMUCapsSet(qemuCaps, QEMU_CAPS_MACHINE_PSERIES_MAX_CPU_COMPAT); } + /* l2-cache-size before 3001000 does not accept INT64_MAX */ + if (qemuCaps->version >= 3001000) + virQEMUCapsSet(qemuCaps, QEMU_CAPS_QCOW2_L2_CACHE_SIZE); + if (virQEMUCapsProbeQMPCommands(qemuCaps, mon) < 0) goto cleanup; diff --git a/src/qemu/qemu_capabilities.h b/src/qemu/qemu_capabilities.h index 6bb9a2c..bb2ac17 100644 --- a/src/qemu/qemu_capabilities.h +++ b/src/qemu/qemu_capabilities.h @@ -493,6 +493,7 @@ typedef enum { /* virQEMUCapsFlags grouping marker for syntax-check */ QEMU_CAPS_VFIO_PCI_DISPLAY, /* -device vfio-pci.display */ QEMU_CAPS_BLOCKDEV, /* -blockdev and blockdev-add are supported */ QEMU_CAPS_DEVICE_VFIO_AP, /* -device vfio-ap */ + QEMU_CAPS_QCOW2_L2_CACHE_SIZE, /* -blockdev supports l2-cache-size with INT64_MAX value */ QEMU_CAPS_LAST /* this must always be the last item */ } virQEMUCapsFlags; -- 1.8.3.1