spapr: Drop CAS reboot flag

The CAS reboot flag is false by default and all the locations that
could set it to true have been dropped. This means that all code
blocks depending on the flag being set is dead code and the other
code blocks should be executed always.

Just do that and drop the now uneeded CAS reboot flag. Fix a
comment on the way to make checkpatch happy.

Signed-off-by: Greg Kurz <[email protected]>
Message-Id: <[email protected]>
Signed-off-by: David Gibson <[email protected]>

hw/ppc/spapr.c

@@ -1579,9 +1579,7 @@ void spapr_setup_hpt(SpaprMachineState *spapr)
 {
     int hpt_shift;
 
-    if ((spapr->resize_hpt == SPAPR_RESIZE_HPT_DISABLED)
-        || (spapr->cas_reboot
-            && !spapr_ovec_test(spapr->ov5_cas, OV5_HPT_RESIZE))) {
+    if (spapr->resize_hpt == SPAPR_RESIZE_HPT_DISABLED) {
         hpt_shift = spapr_hpt_shift_for_ramsize(MACHINE(spapr)->maxram_size);
     } else {
         uint64_t current_ram_size;
@@ -1645,16 +1643,10 @@ static void spapr_machine_reset(MachineState *machine)
 
     qemu_devices_reset();
 
-    /*
-     * If this reset wasn't generated by CAS, we should reset our
-     * negotiated options and start from scratch
-     */
-    if (!spapr->cas_reboot) {
-        spapr_ovec_cleanup(spapr->ov5_cas);
-        spapr->ov5_cas = spapr_ovec_new();
+    spapr_ovec_cleanup(spapr->ov5_cas);
+    spapr->ov5_cas = spapr_ovec_new();
 
-        ppc_set_compat_all(spapr->max_compat_pvr, &error_fatal);
-    }
+    ppc_set_compat_all(spapr->max_compat_pvr, &error_fatal);
 
     /*
      * This is fixing some of the default configuration of the XIVE
@@ -1707,8 +1699,6 @@ static void spapr_machine_reset(MachineState *machine)
     spapr_cpu_set_entry_state(first_ppc_cpu, SPAPR_ENTRY_POINT, 0, fdt_addr, 0);
     first_ppc_cpu->env.gpr[5] = 0;
 
-    spapr->cas_reboot = false;
-
     spapr->fwnmi_system_reset_addr = -1;
     spapr->fwnmi_machine_check_addr = -1;
     spapr->fwnmi_machine_check_interlock = -1;

hw/ppc/spapr_hcall.c

@@ -1678,6 +1678,7 @@ target_ulong do_client_architecture_support(PowerPCCPU *cpu,
     bool raw_mode_supported = false;
     bool guest_xive;
     CPUState *cs;
+    void *fdt;
 
     /* CAS is supposed to be called early when only the boot vCPU is active. */
     CPU_FOREACH(cs) {
@@ -1818,27 +1819,21 @@ target_ulong do_client_architecture_support(PowerPCCPU *cpu,
 
     spapr_handle_transient_dev_before_cas(spapr);
 
-    if (!spapr->cas_reboot) {
-        void *fdt;
-
-        /* If spapr_machine_reset() did not set up a HPT but one is necessary
-         * (because the guest isn't going to use radix) then set it up here. */
-        if ((spapr->patb_entry & PATE1_GR) && !guest_radix) {
-            /* legacy hash or new hash: */
-            spapr_setup_hpt(spapr);
-        }
-
-        fdt = spapr_build_fdt(spapr, false, fdt_bufsize);
-
-        g_free(spapr->fdt_blob);
-        spapr->fdt_size = fdt_totalsize(fdt);
-        spapr->fdt_initial_size = spapr->fdt_size;
-        spapr->fdt_blob = fdt;
+    /*
+     * If spapr_machine_reset() did not set up a HPT but one is necessary
+     * (because the guest isn't going to use radix) then set it up here.
+     */
+    if ((spapr->patb_entry & PATE1_GR) && !guest_radix) {
+        /* legacy hash or new hash: */
+        spapr_setup_hpt(spapr);
     }
 
-    if (spapr->cas_reboot) {
-        qemu_system_reset_request(SHUTDOWN_CAUSE_SUBSYSTEM_RESET);
-    }
+    fdt = spapr_build_fdt(spapr, false, fdt_bufsize);
+
+    g_free(spapr->fdt_blob);
+    spapr->fdt_size = fdt_totalsize(fdt);
+    spapr->fdt_initial_size = spapr->fdt_size;
+    spapr->fdt_blob = fdt;
 
     return H_SUCCESS;
 }

include/hw/ppc/spapr.h

@@ -178,7 +178,6 @@ struct SpaprMachineState {
     SpaprEventSource *event_sources;
 
     /* ibm,client-architecture-support option negotiation */
-    bool cas_reboot;
     bool cas_pre_isa3_guest;
     SpaprOptionVector *ov5;         /* QEMU-supported option vectors */
     SpaprOptionVector *ov5_cas;     /* negotiated (via CAS) option vectors */