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[Bug 1859310] [NEW] libvirt probing fails due to assertion failure with
From: |
Joey Adams |
Subject: |
[Bug 1859310] [NEW] libvirt probing fails due to assertion failure with KVM and 'none' machine type |
Date: |
Sun, 12 Jan 2020 02:36:12 -0000 |
Public bug reported:
Using libvirt on Ubuntu 19.10, I get the following error when I try to
set <emulator> to the latest qemu from git (commit dc65a5bdc9):
error: internal error: Failed to start QEMU binary /usr/local/bin
/qemu-system-x86_64 for probing:
/home/joey/git/qemu/target/i386/kvm.c:2176:kvm_arch_init: Object
0x564bfd5c3200 is not an instance of type x86-machine
Qemu command line to reproduce:
sudo x86_64-softmmu/qemu-system-x86_64 -machine 'none,accel=kvm'
Commit ed9e923c3c (Dec 12, 2019) introduced the issue by removing an
object_dynamic_cast call. In this scenario, kvm_arch_init is passed an
instance of "none-machine" instead of "x86-machine".
The following one-line change to target/i386/kvm.c reintroduces the
cast:
if (kvm_check_extension(s, KVM_CAP_X86_SMM) &&
+ object_dynamic_cast(OBJECT(ms), TYPE_X86_MACHINE) &&
x86_machine_is_smm_enabled(X86_MACHINE(ms))) {
smram_machine_done.notify = register_smram_listener;
qemu_add_machine_init_done_notifier(&smram_machine_done);
}
** Affects: qemu
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1859310
Title:
libvirt probing fails due to assertion failure with KVM and 'none'
machine type
Status in QEMU:
New
Bug description:
Using libvirt on Ubuntu 19.10, I get the following error when I try to
set <emulator> to the latest qemu from git (commit dc65a5bdc9):
error: internal error: Failed to start QEMU binary /usr/local/bin
/qemu-system-x86_64 for probing:
/home/joey/git/qemu/target/i386/kvm.c:2176:kvm_arch_init: Object
0x564bfd5c3200 is not an instance of type x86-machine
Qemu command line to reproduce:
sudo x86_64-softmmu/qemu-system-x86_64 -machine 'none,accel=kvm'
Commit ed9e923c3c (Dec 12, 2019) introduced the issue by removing an
object_dynamic_cast call. In this scenario, kvm_arch_init is passed
an instance of "none-machine" instead of "x86-machine".
The following one-line change to target/i386/kvm.c reintroduces the
cast:
if (kvm_check_extension(s, KVM_CAP_X86_SMM) &&
+ object_dynamic_cast(OBJECT(ms), TYPE_X86_MACHINE) &&
x86_machine_is_smm_enabled(X86_MACHINE(ms))) {
smram_machine_done.notify = register_smram_listener;
qemu_add_machine_init_done_notifier(&smram_machine_done);
}
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- [Bug 1859310] [NEW] libvirt probing fails due to assertion failure with KVM and 'none' machine type,
Joey Adams <=