qemu/include/hw/s390x/cpu-topology.h
Pierre Morel 3d6e75f4df s390x/cpu topology: resetting the Topology-Change-Report
During a subsystem reset the Topology-Change-Report is cleared
by the machine.
Let's ask KVM to clear the Modified Topology Change Report (MTCR)
bit of the SCA in the case of a subsystem reset.

Signed-off-by: Pierre Morel <pmorel@linux.ibm.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Nina Schoetterl-Glausch <nsg@linux.ibm.com>
Co-developed-by: Nina Schoetterl-Glausch <nsg@linux.ibm.com>
Signed-off-by: Nina Schoetterl-Glausch <nsg@linux.ibm.com>
Message-ID: <20231016183925.2384704-7-nsg@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
2023-10-20 07:16:53 +02:00

84 lines
1.9 KiB
C

/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* CPU Topology
*
* Copyright IBM Corp. 2022, 2023
* Author(s): Pierre Morel <pmorel@linux.ibm.com>
*
*/
#ifndef HW_S390X_CPU_TOPOLOGY_H
#define HW_S390X_CPU_TOPOLOGY_H
#ifndef CONFIG_USER_ONLY
#include "qemu/queue.h"
#include "hw/boards.h"
#include "qapi/qapi-types-machine-target.h"
#define S390_TOPOLOGY_CPU_IFL 0x03
typedef struct S390TopologyId {
uint8_t sentinel;
uint8_t drawer;
uint8_t book;
uint8_t socket;
uint8_t type;
uint8_t vertical:1;
uint8_t entitlement:2;
uint8_t dedicated;
uint8_t origin;
} S390TopologyId;
typedef struct S390TopologyEntry {
QTAILQ_ENTRY(S390TopologyEntry) next;
S390TopologyId id;
uint64_t mask;
} S390TopologyEntry;
typedef struct S390Topology {
uint8_t *cores_per_socket;
CpuS390Polarization polarization;
} S390Topology;
typedef QTAILQ_HEAD(, S390TopologyEntry) S390TopologyList;
#ifdef CONFIG_KVM
bool s390_has_topology(void);
void s390_topology_setup_cpu(MachineState *ms, S390CPU *cpu, Error **errp);
void s390_topology_reset(void);
#else
static inline bool s390_has_topology(void)
{
return false;
}
static inline void s390_topology_setup_cpu(MachineState *ms,
S390CPU *cpu,
Error **errp) {}
static inline void s390_topology_reset(void)
{
/* Unreachable, CPU topology not implemented for TCG */
assert(false);
}
#endif
extern S390Topology s390_topology;
static inline int s390_std_socket(int n, CpuTopology *smp)
{
return (n / smp->cores) % smp->sockets;
}
static inline int s390_std_book(int n, CpuTopology *smp)
{
return (n / (smp->cores * smp->sockets)) % smp->books;
}
static inline int s390_std_drawer(int n, CpuTopology *smp)
{
return (n / (smp->cores * smp->sockets * smp->books)) % smp->drawers;
}
#endif /* CONFIG_USER_ONLY */
#endif