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s390x/cpu topology: interception of PTF instruction

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When the host supports the CPU topology facility, the PTF
instruction with function code 2 is interpreted by the SIE,
provided that the userland hypervisor activates the interpretation
by using the KVM_CAP_S390_CPU_TOPOLOGY KVM extension.

The PTF instructions with function code 0 and 1 are intercepted
and must be emulated by the userland hypervisor.

During RESET all CPU of the configuration are placed in
horizontal polarity.

Signed-off-by: Pierre Morel <pmorel@linux.ibm.com>
Reviewed-by: Nina Schoetterl-Glausch <nsg@linux.ibm.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Co-developed-by: Nina Schoetterl-Glausch <nsg@linux.ibm.com>
Signed-off-by: Nina Schoetterl-Glausch <nsg@linux.ibm.com>
Message-ID: <20231016183925.2384704-8-nsg@linux.ibm.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
This commit is contained in:
Pierre Morel 2023-10-16 20:39:11 +02:00 • committed by Thomas Huth
parent 3d6e75f4df
commit af37bad52e
3 changed files with 72 additions and 0 deletions
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6
include/hw/s390x/s390-virtio-ccw.h
View file

@ -30,6 +30,12 @@ struct S390CcwMachineState {
uint8_t loadparm[8];
};
#define S390_PTF_REASON_NONE (0x00 << 8)
#define S390_PTF_REASON_DONE (0x01 << 8)
#define S390_PTF_REASON_BUSY (0x02 << 8)
#define S390_TOPO_FC_MASK 0xffUL
void s390_handle_ptf(S390CPU *cpu, uint8_t r1, uintptr_t ra);
struct S390CcwMachineClass {
/*< private >*/
MachineClass parent_class;