[PATCH 2/3] KVM: PPC: Fix vmx/vsx mixup in mmio emulation

[Nicholas Piggin]

Excerpts from Fabiano Rosas's message of December 24, 2021 7:15 am:
> The MMIO emulation code for vector instructions is duplicated between
> VSX and VMX. When emulating VMX we should check the VMX copy size
> instead of the VSX one.
> 
> Fixes: acc9eb9305fe ("KVM: PPC: Reimplement LOAD_VMX/STORE_VMX instruction ...")
> Signed-off-by: Fabiano Rosas <farosas at linux.ibm.com>

Good catch. AFAIKS handle_vmx_store needs the same treatment? If you
agree then

Reviewed-by: Nicholas Piggin <npiggin at gmail.com>

> ---
>  arch/powerpc/kvm/powerpc.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/arch/powerpc/kvm/powerpc.c b/arch/powerpc/kvm/powerpc.c
> index 1e130bb087c4..793d42bd6c8f 100644
> --- a/arch/powerpc/kvm/powerpc.c
> +++ b/arch/powerpc/kvm/powerpc.c
> @@ -1507,7 +1507,7 @@ int kvmppc_handle_vmx_load(struct kvm_vcpu *vcpu,
>  {
>  	enum emulation_result emulated = EMULATE_DONE;
>  
> -	if (vcpu->arch.mmio_vsx_copy_nums > 2)
> +	if (vcpu->arch.mmio_vmx_copy_nums > 2)
>  		return EMULATE_FAIL;
>  
>  	while (vcpu->arch.mmio_vmx_copy_nums) {
> -- 
> 2.33.1
> 
>