[Qemu-devel] [PATCH v4 2/5] spapr: Implement H_PROD

[Nicholas Piggin <npiggin@gmail.com>]

H_PROD is added, and H_CEDE is modified to test the prod bit
according to PAPR.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
---
 hw/ppc/spapr_hcall.c | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)

diff --git a/hw/ppc/spapr_hcall.c b/hw/ppc/spapr_hcall.c
index e615881ac4..8b208ab259 100644
--- a/hw/ppc/spapr_hcall.c
+++ b/hw/ppc/spapr_hcall.c
@@ -1050,14 +1050,41 @@ static target_ulong h_cede(PowerPCCPU *cpu, SpaprMachineState *spapr,
 {
     CPUPPCState *env = &cpu->env;
     CPUState *cs = CPU(cpu);
+    SpaprCpuState *spapr_cpu = spapr_cpu_state(cpu);
 
     env->msr |= (1ULL << MSR_EE);
     hreg_compute_hflags(env);
+
+    if (spapr_cpu->prod) {
+        spapr_cpu->prod = false;
+        return H_SUCCESS;
+    }
+
     if (!cpu_has_work(cs)) {
         cs->halted = 1;
         cs->exception_index = EXCP_HLT;
         cs->exit_request = 1;
     }
+
+    return H_SUCCESS;
+}
+
+static target_ulong h_prod(PowerPCCPU *cpu, SpaprMachineState *spapr,
+                           target_ulong opcode, target_ulong *args)
+{
+    target_long target = args[0];
+    CPUState *cs;
+    SpaprCpuState *spapr_cpu = spapr_cpu_state(cpu);
+
+    cs = CPU(spapr_find_cpu(target));
+    if (!cs) {
+        return H_PARAMETER;
+    }
+
+    spapr_cpu->prod = true;
+    cs->halted = 0;
+    qemu_cpu_kick(cs);
+
     return H_SUCCESS;
 }
 
@@ -1882,6 +1909,8 @@ static void hypercall_register_types(void)
     /* hcall-splpar */
     spapr_register_hypercall(H_REGISTER_VPA, h_register_vpa);
     spapr_register_hypercall(H_CEDE, h_cede);
+    spapr_register_hypercall(H_PROD, h_prod);
+
     spapr_register_hypercall(H_SIGNAL_SYS_RESET, h_signal_sys_reset);
 
     /* processor register resource access h-calls */
-- 
2.20.1