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380e49297c
PowerPC has two KVM types (HV, PR) that translate into three kernel modules: kvm.ko - common kvm code kvm_hv.ko - kvm running with MSR_HV=1 or MSR_HV|PR=0 in a nested guest. kvm_pr.ko - kvm running in usermode MSR_PR=1. Since the two KVM types can both be running at the same time, this creates a situation in which it is possible for one or both of the modules to fail to initialize, leaving the generic one behind. This leads QEMU to think it can create a guest, but KVM will fail when calling the type-specific code: ioctl(KVM_CREATE_VM) failed: 22 Invalid argument qemu-kvm: failed to initialize KVM: Invalid argument Ideally this would be solved kernel-side, but it might be a while until we can get rid of one of the modules. So in the meantime this patch tries to make this less confusing for the end user by adding a more elucidative message: ioctl(KVM_CREATE_VM) failed: 22 Invalid argument PPC KVM module is not loaded. Try 'modprobe kvm_hv'. [dwg: Fixed error in #elif which failed compile on !ppc hosts] Signed-off-by: Fabiano Rosas <farosas@linux.ibm.com> Message-Id: <20210722141340.2367905-1-farosas@linux.ibm.com> Signed-off-by: David Gibson <david@gibson.dropbear.id.au> |
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| .. | ||
| kvm-accel-ops.c | ||
| kvm-all.c | ||
| kvm-cpus.h | ||
| meson.build | ||
| sev-stub.c | ||
| trace-events | ||
| trace.h | ||