On 03.02.20 14:19, Christian Borntraeger wrote:
> From: Janosch Frank <frankja@xxxxxxxxxxxxx>
>
> We have two new SIE exit codes dealing with instructions.
> 104 (0x68) for a secure instruction interception, on which the SIE needs
> hypervisor action to complete the instruction. We can piggy-back on the
> existing instruction handlers.
>
> 108 which is merely a notification and provides data for tracking and
> management. For example this is used to tell the host about a new value
> for the prefix register. As there will be several special case handlers
> in later patches, we handle this in a separate function.
>
> Signed-off-by: Janosch Frank <frankja@xxxxxxxxxxxxx>
> ---
> arch/s390/include/asm/kvm_host.h | 2 ++
> arch/s390/kvm/intercept.c | 11 +++++++++++
> 2 files changed, 13 insertions(+)
>
> diff --git a/arch/s390/include/asm/kvm_host.h b/arch/s390/include/asm/kvm_host.h
> index d63ed05272ec..58845b315be0 100644
> --- a/arch/s390/include/asm/kvm_host.h
> +++ b/arch/s390/include/asm/kvm_host.h
> @@ -217,6 +217,8 @@ struct kvm_s390_sie_block {
> #define ICPT_KSS 0x5c
> #define ICPT_PV_MCHKR 0x60
> #define ICPT_PV_INT_EN 0x64
> +#define ICPT_PV_INSTR 0x68
> +#define ICPT_PV_NOTIF 0x6c
NOTIFY? NOTIFICATION? NOTIF is weird.
> __u8 icptcode; /* 0x0050 */
> __u8 icptstatus; /* 0x0051 */
> __u16 ihcpu; /* 0x0052 */
> diff --git a/arch/s390/kvm/intercept.c b/arch/s390/kvm/intercept.c
> index eaa2a21c3170..4b3fbbde1674 100644
> --- a/arch/s390/kvm/intercept.c
> +++ b/arch/s390/kvm/intercept.c
> @@ -444,6 +444,11 @@ static int handle_operexc(struct kvm_vcpu *vcpu)
> return kvm_s390_inject_program_int(vcpu, PGM_OPERATION);
> }
>
> +static int handle_pv_not(struct kvm_vcpu *vcpu)
"notification" please. not not. You see why ;)
> +{
> + return handle_instruction(vcpu);
> +}
> +
> int kvm_handle_sie_intercept(struct kvm_vcpu *vcpu)
> {
> int rc, per_rc = 0;
> @@ -490,6 +495,12 @@ int kvm_handle_sie_intercept(struct kvm_vcpu *vcpu)
> */
> rc = 0;
> break;
> + case ICPT_PV_INSTR:
> + rc = handle_instruction(vcpu);
> + break;
> + case ICPT_PV_NOTIF:
> + rc = handle_pv_not(vcpu);
> + break;
> default:
> return -EOPNOTSUPP;
> }
Reviewed-by: David Hildenbrand <david@xxxxxxxxxx>
--
Thanks,
David / dhildenb
