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spapr: nested: register nested-hv api hcalls only for cap-nested-hv

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Since cap-nested-hv is an optional capability, it makes sense to register
api specfic hcalls only when respective capability is enabled. This
requires to introduce a new API to unregister hypercalls to maintain
sanity across guest reboot since caps are re-applied across reboots and
re-registeration of hypercalls would hit assert otherwise.

Reviewed-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Harsh Prateek Bora <harshpb@linux.ibm.com>
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
This commit is contained in:
Harsh Prateek Bora 2024-03-08 16:49:27 +05:30 • committed by Nicholas Piggin
parent 868cb6bac5
commit 6026fdbdbd
5 changed files with 50 additions and 5 deletions
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4
include/hw/ppc/spapr.h
View file

@ -631,6 +631,7 @@ typedef target_ulong (*spapr_hcall_fn)(PowerPCCPU *cpu, SpaprMachineState *sm,
target_ulong *args);
void spapr_register_hypercall(target_ulong opcode, spapr_hcall_fn fn);
void spapr_unregister_hypercall(target_ulong opcode);
target_ulong spapr_hypercall(PowerPCCPU *cpu, target_ulong opcode,
target_ulong *args);
@ -1028,5 +1029,8 @@ void spapr_vof_client_dt_finalize(SpaprMachineState *spapr, void *fdt);
/* H_WATCHDOG */
void spapr_watchdog_init(SpaprMachineState *spapr);
void spapr_register_nested_hv(void);
void spapr_unregister_nested_hv(void);
void spapr_nested_reset(SpaprMachineState *spapr);
#endif /* HW_SPAPR_H */

1
include/hw/ppc/spapr_nested.h
View file

@ -95,7 +95,6 @@ struct nested_ppc_state {
int64_t tb_offset;
};
void spapr_register_nested(void);
void spapr_exit_nested(PowerPCCPU *cpu, int excp);
#endif /* HW_SPAPR_NESTED_H */