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authorThomas Huth <thuth@redhat.com>2016-02-11 13:47:18 +0100
committerDavid Gibson <david@gibson.dropbear.id.au>2016-02-17 09:59:30 +1100
commit423576f771db8c6dbb944ddb8dc15b472f62de4a (patch)
tree3d6a02fcd670b7d83ee5bcb42a57b6c13ac1707a
parent378bc21756f016abfde16a0de4977be49f499b1c (diff)
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hw/ppc/spapr: Add h_set_sprg0 hypercall
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>
-rw-r--r--hw/ppc/spapr_hcall.c15
1 files changed, 13 insertions, 2 deletions
diff --git a/hw/ppc/spapr_hcall.c b/hw/ppc/spapr_hcall.c
index 12f8c33..63f41ec 100644
--- a/hw/ppc/spapr_hcall.c
+++ b/hw/ppc/spapr_hcall.c
@@ -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);
}