On Tue, 17 May 2022 16:36:26 +0000
Janosch Frank <frankja@xxxxxxxxxxxxx> wrote:
> The capability indicates dump support for protected VMs.
>
> Signed-off-by: Janosch Frank <frankja@xxxxxxxxxxxxx>
Reviewed-by: Claudio Imbrenda <imbrenda@xxxxxxxxxxxxx>
> ---
> arch/s390/kvm/kvm-s390.c | 20 ++++++++++++++++++++
> include/uapi/linux/kvm.h | 1 +
> 2 files changed, 21 insertions(+)
>
> diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c
> index 1938756d4a32..99ce1aced86b 100644
> --- a/arch/s390/kvm/kvm-s390.c
> +++ b/arch/s390/kvm/kvm-s390.c
> @@ -606,6 +606,26 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
> case KVM_CAP_S390_PROTECTED:
> r = is_prot_virt_host();
> break;
> + case KVM_CAP_S390_PROTECTED_DUMP: {
> + u64 pv_cmds_dump[] = {
> + BIT_UVC_CMD_DUMP_INIT,
> + BIT_UVC_CMD_DUMP_CONFIG_STOR_STATE,
> + BIT_UVC_CMD_DUMP_CPU,
> + BIT_UVC_CMD_DUMP_COMPLETE,
> + };
> + int i;
> +
> + r = is_prot_virt_host();
> +
> + for (i = 0; i < ARRAY_SIZE(pv_cmds_dump); i++) {
> + if (!test_bit_inv(pv_cmds_dump[i],
> + (unsigned long *)&uv_info.inst_calls_list)) {
> + r = 0;
> + break;
> + }
> + }
> + break;
> + }
> default:
> r = 0;
> }
> diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h
> index 204b06e3a50b..108bc7b7a71b 100644
> --- a/include/uapi/linux/kvm.h
> +++ b/include/uapi/linux/kvm.h
> @@ -1144,6 +1144,7 @@ struct kvm_ppc_resize_hpt {
> #define KVM_CAP_S390_MEM_OP_EXTENSION 211
> #define KVM_CAP_PMU_CAPABILITY 212
> #define KVM_CAP_DISABLE_QUIRKS2 213
> +#define KVM_CAP_S390_PROTECTED_DUMP 214
>
> #ifdef KVM_CAP_IRQ_ROUTING
>
