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hw/ppc/spapr: Add h_set_sprg0 hypercall

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This is a very simple hypercall that only sets up the SPRG0
register for the guest (since writing to SPRG0 was only permitted
to the hypervisor in older versions of the PowerISA).

Signed-off-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This commit is contained in:
Thomas Huth 2016-02-11 13:47:18 +01:00 committed by David Gibson
parent 378bc21756
commit 423576f771
1 changed files with 13 additions and 2 deletions
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15
hw/ppc/spapr_hcall.c
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@ -332,6 +332,15 @@ static target_ulong h_read(PowerPCCPU *cpu, sPAPRMachineState *spapr,
return H_SUCCESS;
}
static target_ulong h_set_sprg0(PowerPCCPU *cpu, sPAPRMachineState *spapr,
target_ulong opcode, target_ulong *args)
{
cpu_synchronize_state(CPU(cpu));
cpu->env.spr[SPR_SPRG0] = args[0];
return H_SUCCESS;
}
static target_ulong h_set_dabr(PowerPCCPU *cpu, sPAPRMachineState *spapr,
target_ulong opcode, target_ulong *args)
{
@ -997,6 +1006,10 @@ static void hypercall_register_types(void)
spapr_register_hypercall(H_REGISTER_VPA, h_register_vpa);
spapr_register_hypercall(H_CEDE, h_cede);
/* processor register resource access h-calls */
spapr_register_hypercall(H_SET_SPRG0, h_set_sprg0);
spapr_register_hypercall(H_SET_MODE, h_set_mode);
/* "debugger" hcalls (also used by SLOF). Note: We do -not- differenciate
* here between the "CI" and the "CACHE" variants, they will use whatever
* mapping attributes qemu is using. When using KVM, the kernel will
@ -1013,8 +1026,6 @@ static void hypercall_register_types(void)
/* qemu/KVM-PPC specific hcalls */
spapr_register_hypercall(KVMPPC_H_RTAS, h_rtas);
spapr_register_hypercall(H_SET_MODE, h_set_mode);
/* ibm,client-architecture-support support */
spapr_register_hypercall(KVMPPC_H_CAS, h_client_architecture_support);
}