KVM: target-ppc: Enable TM state migration

This adds migration support for registers saved before Transactional
Memory (TM) transaction started.
Signed-off-by: NAlexey Kardashevskiy <aik@ozlabs.ru>
Reviewed-by: NTom Musta <tommusta@gmail.com>
Signed-off-by: NAlexander Graf <agraf@suse.de>

target-ppc/cpu.h

@@ -1099,6 +1099,20 @@ struct CPUPPCState {
      */
     uint8_t fit_period[4];
     uint8_t wdt_period[4];
+
+    /* Transactional memory state */
+    target_ulong tm_gpr[32];
+    ppc_avr_t tm_vsr[64];
+    uint64_t tm_cr;
+    uint64_t tm_lr;
+    uint64_t tm_ctr;
+    uint64_t tm_fpscr;
+    uint64_t tm_amr;
+    uint64_t tm_ppr;
+    uint64_t tm_vrsave;
+    uint32_t tm_vscr;
+    uint64_t tm_dscr;
+    uint64_t tm_tar;
 };
 
 #define SET_FIT_PERIOD(a_, b_, c_, d_)          \

target-ppc/kvm.c

@@ -865,6 +865,25 @@ int kvm_arch_put_registers(CPUState *cs, int level)
         }
 
 #ifdef TARGET_PPC64
+        if (msr_ts) {
+            for (i = 0; i < ARRAY_SIZE(env->tm_gpr); i++) {
+                kvm_set_one_reg(cs, KVM_REG_PPC_TM_GPR(i), &env->tm_gpr[i]);
+            }
+            for (i = 0; i < ARRAY_SIZE(env->tm_vsr); i++) {
+                kvm_set_one_reg(cs, KVM_REG_PPC_TM_VSR(i), &env->tm_vsr[i]);
+            }
+            kvm_set_one_reg(cs, KVM_REG_PPC_TM_CR, &env->tm_cr);
+            kvm_set_one_reg(cs, KVM_REG_PPC_TM_LR, &env->tm_lr);
+            kvm_set_one_reg(cs, KVM_REG_PPC_TM_CTR, &env->tm_ctr);
+            kvm_set_one_reg(cs, KVM_REG_PPC_TM_FPSCR, &env->tm_fpscr);
+            kvm_set_one_reg(cs, KVM_REG_PPC_TM_AMR, &env->tm_amr);
+            kvm_set_one_reg(cs, KVM_REG_PPC_TM_PPR, &env->tm_ppr);
+            kvm_set_one_reg(cs, KVM_REG_PPC_TM_VRSAVE, &env->tm_vrsave);
+            kvm_set_one_reg(cs, KVM_REG_PPC_TM_VSCR, &env->tm_vscr);
+            kvm_set_one_reg(cs, KVM_REG_PPC_TM_DSCR, &env->tm_dscr);
+            kvm_set_one_reg(cs, KVM_REG_PPC_TM_TAR, &env->tm_tar);
+        }
+
         if (cap_papr) {
             if (kvm_put_vpa(cs) < 0) {
                 DPRINTF("Warning: Unable to set VPA information to KVM\n");
@@ -1091,6 +1110,25 @@ int kvm_arch_get_registers(CPUState *cs)
         }
 
 #ifdef TARGET_PPC64
+        if (msr_ts) {
+            for (i = 0; i < ARRAY_SIZE(env->tm_gpr); i++) {
+                kvm_get_one_reg(cs, KVM_REG_PPC_TM_GPR(i), &env->tm_gpr[i]);
+            }
+            for (i = 0; i < ARRAY_SIZE(env->tm_vsr); i++) {
+                kvm_get_one_reg(cs, KVM_REG_PPC_TM_VSR(i), &env->tm_vsr[i]);
+            }
+            kvm_get_one_reg(cs, KVM_REG_PPC_TM_CR, &env->tm_cr);
+            kvm_get_one_reg(cs, KVM_REG_PPC_TM_LR, &env->tm_lr);
+            kvm_get_one_reg(cs, KVM_REG_PPC_TM_CTR, &env->tm_ctr);
+            kvm_get_one_reg(cs, KVM_REG_PPC_TM_FPSCR, &env->tm_fpscr);
+            kvm_get_one_reg(cs, KVM_REG_PPC_TM_AMR, &env->tm_amr);
+            kvm_get_one_reg(cs, KVM_REG_PPC_TM_PPR, &env->tm_ppr);
+            kvm_get_one_reg(cs, KVM_REG_PPC_TM_VRSAVE, &env->tm_vrsave);
+            kvm_get_one_reg(cs, KVM_REG_PPC_TM_VSCR, &env->tm_vscr);
+            kvm_get_one_reg(cs, KVM_REG_PPC_TM_DSCR, &env->tm_dscr);
+            kvm_get_one_reg(cs, KVM_REG_PPC_TM_TAR, &env->tm_tar);
+        }
+
         if (cap_papr) {
             if (kvm_get_vpa(cs) < 0) {
                 DPRINTF("Warning: Unable to get VPA information from KVM\n");

target-ppc/machine.c

@@ -249,6 +249,38 @@ static const VMStateDescription vmstate_vsx = {
     },
 };
 
+#ifdef TARGET_PPC64
+/* Transactional memory state */
+static bool tm_needed(void *opaque)
+{
+    PowerPCCPU *cpu = opaque;
+    CPUPPCState *env = &cpu->env;
+    return msr_ts;
+}
+
+static const VMStateDescription vmstate_tm = {
+    .name = "cpu/tm",
+    .version_id = 1,
+    .minimum_version_id = 1,
+    .minimum_version_id_old = 1,
+    .fields      = (VMStateField []) {
+        VMSTATE_UINTTL_ARRAY(env.tm_gpr, PowerPCCPU, 32),
+        VMSTATE_AVR_ARRAY(env.tm_vsr, PowerPCCPU, 64),
+        VMSTATE_UINT64(env.tm_cr, PowerPCCPU),
+        VMSTATE_UINT64(env.tm_lr, PowerPCCPU),
+        VMSTATE_UINT64(env.tm_ctr, PowerPCCPU),
+        VMSTATE_UINT64(env.tm_fpscr, PowerPCCPU),
+        VMSTATE_UINT64(env.tm_amr, PowerPCCPU),
+        VMSTATE_UINT64(env.tm_ppr, PowerPCCPU),
+        VMSTATE_UINT64(env.tm_vrsave, PowerPCCPU),
+        VMSTATE_UINT32(env.tm_vscr, PowerPCCPU),
+        VMSTATE_UINT64(env.tm_dscr, PowerPCCPU),
+        VMSTATE_UINT64(env.tm_tar, PowerPCCPU),
+        VMSTATE_END_OF_LIST()
+    },
+};
+#endif
+
 static bool sr_needed(void *opaque)
 {
 #ifdef TARGET_PPC64
@@ -510,6 +542,9 @@ const VMStateDescription vmstate_ppc_cpu = {
             .needed = sr_needed,
         } , {
 #ifdef TARGET_PPC64
+            .vmsd = &vmstate_tm,
+            .needed = tm_needed,
+        } , {
             .vmsd = &vmstate_slb,
             .needed = slb_needed,
         } , {