Re: [PATCH 0/7] hw/kvm: Exit gracefully when KVM is not supported

[Claudio Fontana]

On 2/19/21 12:44 PM, Philippe Mathieu-Daudé wrote:
> Hi,
> 
> This series aims to improve user experience by providing
> a better error message when the user tries to enable KVM
> on machines not supporting it.
> 
> Regards,
> 
> Phil.

Hi Philippe, not sure if it fits in this series,

but also the experience of a user running on a machine with cortex-a72,
choosing that very same cpu with -cpu and then getting:

qemu-system-aarch64: kvm_init_vcpu: kvm_arch_init_vcpu failed (0): Invalid 
argument

is not super-friendly. Maybe some suggestion to use -cpu host with KVM could be 
good?

Thanks,

Claudio

> 
> Philippe Mathieu-Daudé (7):
>   accel/kvm: Check MachineClass kvm_type() return value
>   hw/boards: Introduce 'kvm_supported' field to MachineClass
>   hw/arm: Set kvm_supported for KVM-compatible machines
>   hw/mips: Set kvm_supported for KVM-compatible machines
>   hw/ppc: Set kvm_supported for KVM-compatible machines
>   hw/s390x: Set kvm_supported to s390-ccw-virtio machines
>   accel/kvm: Exit gracefully when KVM is not supported
> 
>  include/hw/boards.h        |  6 +++++-
>  accel/kvm/kvm-all.c        | 12 ++++++++++++
>  hw/arm/sbsa-ref.c          |  1 +
>  hw/arm/virt.c              |  1 +
>  hw/arm/xlnx-versal-virt.c  |  1 +
>  hw/mips/loongson3_virt.c   |  1 +
>  hw/mips/malta.c            |  1 +
>  hw/ppc/e500plat.c          |  1 +
>  hw/ppc/mac_newworld.c      |  1 +
>  hw/ppc/mac_oldworld.c      |  1 +
>  hw/ppc/mpc8544ds.c         |  1 +
>  hw/ppc/ppc440_bamboo.c     |  1 +
>  hw/ppc/prep.c              |  1 +
>  hw/ppc/sam460ex.c          |  1 +
>  hw/ppc/spapr.c             |  1 +
>  hw/s390x/s390-virtio-ccw.c |  1 +
>  16 files changed, 31 insertions(+), 1 deletion(-)
>