Re: [libvirt] [PATCH v2 1/3] adding QEMU_CAPS_QUERY_CURRENT_MACHINE and QEMU_CAPS_PM_WAKEUP_SUPPORT

QEMU commit 46ea94ca9cf ("qmp: query-current-machine with wakeup-suspend-support") added a new QMP command called 'query-current-machine' that retrieves guest parameters that can vary in the same machine model (e.g. ACPI support for x86 VMs depends on the '--no-acpi' option). Currently, this API has a single flag, 'wakeup-suspend-support', that indicates whether the guest has the capability of waking up from suspended state. The original intent of this new API is to avoid situations such as [1], where an user can execute "virsh dompmsuspend" in a guest that can't wake up due to lack of support, making the guest unusable. This is currently the case for any non-x86 arch guests and for some x86 guests that starts with --no-acpi (q35 machines implements suspend support even with the --no-acpi flag). This is the Libvirt side of this API that will be available in QEMU 4.0. QEMU_CAPS_QUERY_CURRENT_MACHINE is a new virQEMUCapsCommands that will indicate if the QEMU binary supports the 'query-current-machine' API. QEMU_CAPS_PM_WAKEUP_SUPPORT is a flag that reflects the 'wakeup-suspend-support' value for the current QEMU instance. In the next patches these two caps will be populated and used in qemu_driver.c, 'qemuDomainPMSuspendForDuration', to complete the fix for [1]. [1] https://github.com/open-power-host-os/qemu/issues/31 Signed-off-by: Daniel Henrique Barboza <danielhb413(a)gmail.com&gt; --- src/qemu/qemu_capabilities.c | 5 +++++ src/qemu/qemu_capabilities.h | 4 ++++ tests/qemucapabilitiesdata/caps_4.0.0.riscv32.xml | 1 + tests/qemucapabilitiesdata/caps_4.0.0.riscv64.xml | 1 + tests/qemucapabilitiesdata/caps_4.0.0.x86_64.xml | 1 + 5 files changed, 12 insertions(+) diff --git a/src/qemu/qemu_capabilities.c b/src/qemu/qemu_capabilities.c index 71d4c01296..5c1b41aa3e 100644 --- a/src/qemu/qemu_capabilities.c +++ b/src/qemu/qemu_capabilities.c @@ -523,6 +523,10 @@ VIR_ENUM_IMPL(virQEMUCaps, QEMU_CAPS_LAST, "nvdimm.unarmed", "scsi-disk.device_id", "virtio-pci-non-transitional", + "query-current-machine", + + /* 330 */ + "wakeup-suspend-support",