On Tue, 2023-04-25 at 18:14 +0200, Pierre Morel wrote:
> On interception of STSI(15.1.x) the System Information Block
> (SYSIB) is built from the list of pre-ordered topology entries.
>
> Signed-off-by: Pierre Morel <pmo...@linux.ibm.com>
> ---
> MAINTAINERS | 1 +
> include/hw/s390x/cpu-topology.h | 24 +++
> include/hw/s390x/sclp.h | 1 +
> target/s390x/cpu.h | 72 ++++++++
> hw/s390x/cpu-topology.c | 13 +-
> target/s390x/kvm/cpu_topology.c | 308 ++++++++++++++++++++++++++++++++
> target/s390x/kvm/kvm.c | 5 +-
> target/s390x/kvm/meson.build | 3 +-
> 8 files changed, 424 insertions(+), 3 deletions(-)
> create mode 100644 target/s390x/kvm/cpu_topology.c
>
> diff --git a/MAINTAINERS b/MAINTAINERS
> index bb7b34d0d8..de9052f753 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -1659,6 +1659,7 @@ M: Pierre Morel <pmo...@linux.ibm.com>
> S: Supported
> F: include/hw/s390x/cpu-topology.h
> F: hw/s390x/cpu-topology.c
> +F: target/s390x/kvm/cpu_topology.c
>
> X86 Machines
> ------------
> diff --git a/include/hw/s390x/cpu-topology.h b/include/hw/s390x/cpu-topology.h
> index af36f634e0..87bfeb631e 100644
> --- a/include/hw/s390x/cpu-topology.h
> +++ b/include/hw/s390x/cpu-topology.h
> @@ -15,9 +15,33 @@
>
[...]
> +typedef struct S390TopologyEntry {
> + QTAILQ_ENTRY(S390TopologyEntry) next;
> + s390_topology_id id;
> + uint64_t mask;
> +} S390TopologyEntry;
> +
> typedef struct S390Topology {
> uint8_t *cores_per_socket;
> + QTAILQ_HEAD(, S390TopologyEntry) list;
Since you recompute the list on every STSI, you no longer need this in here.
You can create it in insert_stsi_15_1_x.
> CpuTopology *smp;
> + bool vertical_polarization;
> } S390Topology;
[...]
> +/*
> + * Macro to check that the size of data after increment
> + * will not get bigger than the size of the SysIB.
> + */
> +#define SYSIB_GUARD(data, x) do { \
> + data += x; \
> + if (data > sizeof(SysIB)) { \
^ two spaces
> + return 0; \
> + } \
> + } while (0)
> +
[...]
> +/**
> + * s390_topology_from_cpu:
> + * @cpu: The S390CPU
> + *
> + * Initialize the topology id from the CPU environment.
> + */
> +static s390_topology_id s390_topology_from_cpu(S390CPU *cpu)
> +{
> + s390_topology_id topology_id = {0};
> +
> + topology_id.drawer = cpu->env.drawer_id;
> + topology_id.book = cpu->env.book_id;
> + topology_id.socket = cpu->env.socket_id;
> + topology_id.origin = cpu->env.core_id / 64;
> + topology_id.type = S390_TOPOLOGY_CPU_IFL;
> + topology_id.dedicated = cpu->env.dedicated;
> +
> + if (s390_topology.vertical_polarization) {
> + /*
> + * Vertical polarization with dedicated CPU implies
> + * vertical high entitlement.
> + */
This has already been adjusted or rejected when the entitlement was set.
> + if (topology_id.dedicated) {
> + topology_id.entitlement = S390_CPU_ENTITLEMENT_HIGH;
> + } else {
> + topology_id.entitlement = cpu->env.entitlement;
You only need this assignment.
> + }
> + }
> +
> + return topology_id;
[...]
