target/ppc: fix CPU hotplug when radix is enabled (TCG)

But when a guest initializes radix mode, it issues a H_REGISTER_PROC_TBL
to update the LPCR of all CPUs. Hot-plugged CPUs inherit from the same
setting under KVM but not under TCG. So, Let's check for radix and update
the default LPCR to keep new CPUs in sync.

Signed-off-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>

diff --git a/target/ppc/translate_init.c b/target/ppc/translate_init.c
index ae25fafab997b3931f6da434a294bf34753e6f7e..b325c2cce6f34de45d5216604e42abc10e019a9c 100644 (file)
--- a/target/ppc/translate_init.c
+++ b/target/ppc/translate_init.c
@@ -9011,8 +9011,16 @@ void cpu_ppc_set_papr(PowerPCCPU *cpu, PPCVirtualHypervisor *vhyp)
         /* By default we choose legacy mode and switch to new hash or radix
          * when a register process table hcall is made. So disable process
          * tables and guest translation shootdown by default
+         *
+         * Hot-plugged CPUs inherit from the guest radix setting under
+         * KVM but not under TCG. Update the default LPCR to keep new
+         * CPUs in sync when radix is enabled.
          */
-        lpcr->default_value &= ~(LPCR_UPRT | LPCR_GTSE);
+        if (ppc64_radix_guest(cpu)) {
+            lpcr->default_value |= LPCR_UPRT | LPCR_GTSE;
+        } else {
+            lpcr->default_value &= ~(LPCR_UPRT | LPCR_GTSE);
+        }
         lpcr->default_value |= LPCR_PDEE | LPCR_HDEE | LPCR_EEE | LPCR_DEE |
                                LPCR_OEE;
         break;