target/ppc, spapr: Move VPA information to machine_data

CPUPPCState currently contains a number of fields containing the state of
the VPA.  The VPA is a PAPR specific concept covering several guest/host
shared memory areas used to communicate some information with the
hypervisor.

As a PAPR concept this is really machine specific information, although it
is per-cpu, so it doesn't really belong in the core CPU state structure.

There's also other information that's per-cpu, but platform/machine
specific.  So create a (void *)machine_data in PowerPCCPU which can be
used by the machine to locate per-cpu data.  Intialization, lifetime and
cleanup of machine_data is entirely up to the machine type.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Reviewed-by: Greg Kurz <groug@kaod.org>
Tested-by: Greg Kurz <groug@kaod.org>

hw/ppc/spapr_cpu_core.c

@@ -28,6 +28,7 @@ static void spapr_cpu_reset(void *opaque)
     CPUState *cs = CPU(cpu);
     CPUPPCState *env = &cpu->env;
     PowerPCCPUClass *pcc = POWERPC_CPU_GET_CLASS(cpu);
+    sPAPRCPUState *spapr_cpu = spapr_cpu_state(cpu);
     target_ulong lpcr;
 
     cpu_reset(cs);
@@ -69,6 +70,12 @@ static void spapr_cpu_reset(void *opaque)
 
     /* Set a full AMOR so guest can use the AMR as it sees fit */
     env->spr[SPR_AMOR] = 0xffffffffffffffffull;
+
+    spapr_cpu->vpa_addr = 0;
+    spapr_cpu->slb_shadow_addr = 0;
+    spapr_cpu->slb_shadow_size = 0;
+    spapr_cpu->dtl_addr = 0;
+    spapr_cpu->dtl_size = 0;
 }
 
 void spapr_cpu_set_entry_state(PowerPCCPU *cpu, target_ulong nip, target_ulong r3)
@@ -186,6 +193,8 @@ static PowerPCCPU *spapr_create_vcpu(sPAPRCPUCore *sc, int i, Error **errp)
         goto err;
     }
 
+    cpu->machine_data = g_new0(sPAPRCPUState, 1);
+
     object_unref(obj);
     return cpu;
 
@@ -197,6 +206,10 @@ static PowerPCCPU *spapr_create_vcpu(sPAPRCPUCore *sc, int i, Error **errp)
 
 static void spapr_delete_vcpu(PowerPCCPU *cpu)
 {
+    sPAPRCPUState *spapr_cpu = spapr_cpu_state(cpu);
+
+    cpu->machine_data = NULL;
+    g_free(spapr_cpu);
     object_unparent(OBJECT(cpu));
 }
 

hw/ppc/spapr_hcall.c

@@ -8,6 +8,7 @@
 #include "exec/exec-all.h"
 #include "helper_regs.h"
 #include "hw/ppc/spapr.h"
+#include "hw/ppc/spapr_cpu_core.h"
 #include "mmu-hash64.h"
 #include "cpu-models.h"
 #include "trace.h"
@@ -908,9 +909,11 @@ static target_ulong h_page_init(PowerPCCPU *cpu, sPAPRMachineState *spapr,
 #define VPA_SHARED_PROC_OFFSET 0x9
 #define VPA_SHARED_PROC_VAL    0x2
 
-static target_ulong register_vpa(CPUPPCState *env, target_ulong vpa)
+static target_ulong register_vpa(PowerPCCPU *cpu, target_ulong vpa)
 {
-    CPUState *cs = CPU(ppc_env_get_cpu(env));
+    CPUState *cs = CPU(cpu);
+    CPUPPCState *env = &cpu->env;
+    sPAPRCPUState *spapr_cpu = spapr_cpu_state(cpu);
     uint16_t size;
     uint8_t tmp;
 
@@ -935,40 +938,42 @@ static target_ulong register_vpa(CPUPPCState *env, target_ulong vpa)
         return H_PARAMETER;
     }
 
-    env->vpa_addr = vpa;
+    spapr_cpu->vpa_addr = vpa;
 
-    tmp = ldub_phys(cs->as, env->vpa_addr + VPA_SHARED_PROC_OFFSET);
+    tmp = ldub_phys(cs->as, spapr_cpu->vpa_addr + VPA_SHARED_PROC_OFFSET);
     tmp |= VPA_SHARED_PROC_VAL;
-    stb_phys(cs->as, env->vpa_addr + VPA_SHARED_PROC_OFFSET, tmp);
+    stb_phys(cs->as, spapr_cpu->vpa_addr + VPA_SHARED_PROC_OFFSET, tmp);
 
     return H_SUCCESS;
 }
 
-static target_ulong deregister_vpa(CPUPPCState *env, target_ulong vpa)
+static target_ulong deregister_vpa(PowerPCCPU *cpu, target_ulong vpa)
 {
-    if (env->slb_shadow_addr) {
+    sPAPRCPUState *spapr_cpu = spapr_cpu_state(cpu);
+
+    if (spapr_cpu->slb_shadow_addr) {
         return H_RESOURCE;
     }
 
-    if (env->dtl_addr) {
+    if (spapr_cpu->dtl_addr) {
         return H_RESOURCE;
     }
 
-    env->vpa_addr = 0;
+    spapr_cpu->vpa_addr = 0;
     return H_SUCCESS;
 }
 
-static target_ulong register_slb_shadow(CPUPPCState *env, target_ulong addr)
+static target_ulong register_slb_shadow(PowerPCCPU *cpu, target_ulong addr)
 {
-    CPUState *cs = CPU(ppc_env_get_cpu(env));
+    sPAPRCPUState *spapr_cpu = spapr_cpu_state(cpu);
     uint32_t size;
 
     if (addr == 0) {
         hcall_dprintf("Can't cope with SLB shadow at logical 0\n");
         return H_HARDWARE;
     }
 
-    size = ldl_be_phys(cs->as, addr + 0x4);
+    size = ldl_be_phys(CPU(cpu)->as, addr + 0x4);
     if (size < 0x8) {
         return H_PARAMETER;
     }
@@ -977,53 +982,57 @@ static target_ulong register_slb_shadow(CPUPPCState *env, target_ulong addr)
         return H_PARAMETER;
     }
 
-    if (!env->vpa_addr) {
+    if (!spapr_cpu->vpa_addr) {
         return H_RESOURCE;
     }
 
-    env->slb_shadow_addr = addr;
-    env->slb_shadow_size = size;
+    spapr_cpu->slb_shadow_addr = addr;
+    spapr_cpu->slb_shadow_size = size;
 
     return H_SUCCESS;
 }
 
-static target_ulong deregister_slb_shadow(CPUPPCState *env, target_ulong addr)
+static target_ulong deregister_slb_shadow(PowerPCCPU *cpu, target_ulong addr)
 {
-    env->slb_shadow_addr = 0;
-    env->slb_shadow_size = 0;
+    sPAPRCPUState *spapr_cpu = spapr_cpu_state(cpu);
+
+    spapr_cpu->slb_shadow_addr = 0;
+    spapr_cpu->slb_shadow_size = 0;
     return H_SUCCESS;
 }
 
-static target_ulong register_dtl(CPUPPCState *env, target_ulong addr)
+static target_ulong register_dtl(PowerPCCPU *cpu, target_ulong addr)
 {
-    CPUState *cs = CPU(ppc_env_get_cpu(env));
+    sPAPRCPUState *spapr_cpu = spapr_cpu_state(cpu);
     uint32_t size;
 
     if (addr == 0) {
         hcall_dprintf("Can't cope with DTL at logical 0\n");
         return H_HARDWARE;
     }
 
-    size = ldl_be_phys(cs->as, addr + 0x4);
+    size = ldl_be_phys(CPU(cpu)->as, addr + 0x4);
 
     if (size < 48) {
         return H_PARAMETER;
     }
 
-    if (!env->vpa_addr) {
+    if (!spapr_cpu->vpa_addr) {
         return H_RESOURCE;
     }
 
-    env->dtl_addr = addr;
-    env->dtl_size = size;
+    spapr_cpu->dtl_addr = addr;
+    spapr_cpu->dtl_size = size;
 
     return H_SUCCESS;
 }
 
-static target_ulong deregister_dtl(CPUPPCState *env, target_ulong addr)
+static target_ulong deregister_dtl(PowerPCCPU *cpu, target_ulong addr)
 {
-    env->dtl_addr = 0;
-    env->dtl_size = 0;
+    sPAPRCPUState *spapr_cpu = spapr_cpu_state(cpu);
+
+    spapr_cpu->dtl_addr = 0;
+    spapr_cpu->dtl_size = 0;
 
     return H_SUCCESS;
 }
@@ -1035,38 +1044,36 @@ static target_ulong h_register_vpa(PowerPCCPU *cpu, sPAPRMachineState *spapr,
     target_ulong procno = args[1];
     target_ulong vpa = args[2];
     target_ulong ret = H_PARAMETER;
-    CPUPPCState *tenv;
     PowerPCCPU *tcpu;
 
     tcpu = spapr_find_cpu(procno);
     if (!tcpu) {
         return H_PARAMETER;
     }
-    tenv = &tcpu->env;
 
     switch (flags) {
     case FLAGS_REGISTER_VPA:
-        ret = register_vpa(tenv, vpa);
+        ret = register_vpa(tcpu, vpa);
         break;
 
     case FLAGS_DEREGISTER_VPA:
-        ret = deregister_vpa(tenv, vpa);
+        ret = deregister_vpa(tcpu, vpa);
         break;
 
     case FLAGS_REGISTER_SLBSHADOW:
-        ret = register_slb_shadow(tenv, vpa);
+        ret = register_slb_shadow(tcpu, vpa);
         break;
 
     case FLAGS_DEREGISTER_SLBSHADOW:
-        ret = deregister_slb_shadow(tenv, vpa);
+        ret = deregister_slb_shadow(tcpu, vpa);
         break;
 
     case FLAGS_REGISTER_DTL:
-        ret = register_dtl(tenv, vpa);
+        ret = register_dtl(tcpu, vpa);
         break;
 
     case FLAGS_DEREGISTER_DTL:
-        ret = deregister_dtl(tenv, vpa);
+        ret = deregister_dtl(tcpu, vpa);
         break;
     }
 

include/hw/ppc/spapr_cpu_core.h

@@ -41,4 +41,15 @@ typedef struct sPAPRCPUCoreClass {
 const char *spapr_get_cpu_core_type(const char *cpu_type);
 void spapr_cpu_set_entry_state(PowerPCCPU *cpu, target_ulong nip, target_ulong r3);
 
+typedef struct sPAPRCPUState {
+    uint64_t vpa_addr;
+    uint64_t slb_shadow_addr, slb_shadow_size;
+    uint64_t dtl_addr, dtl_size;
+} sPAPRCPUState;
+
+static inline sPAPRCPUState *spapr_cpu_state(PowerPCCPU *cpu)
+{
+    return (sPAPRCPUState *)cpu->machine_data;
+}
+
 #endif

target/ppc/cpu.h

@@ -1091,12 +1091,6 @@ struct CPUPPCState {
     target_ulong rmls;
 #endif
 
-#if defined(TARGET_PPC64) && !defined(CONFIG_USER_ONLY)
-    uint64_t vpa_addr;
-    uint64_t slb_shadow_addr, slb_shadow_size;
-    uint64_t dtl_addr, dtl_size;
-#endif /* TARGET_PPC64 */
-
     int error_code;
     uint32_t pending_interrupts;
 #if !defined(CONFIG_USER_ONLY)
@@ -1205,6 +1199,7 @@ struct PowerPCCPU {
     uint32_t compat_pvr;
     PPCVirtualHypervisor *vhyp;
     Object *intc;
+    void *machine_data;
     int32_t node_id; /* NUMA node this CPU belongs to */
     PPCHash64Options *hash64_opts;
 

target/ppc/kvm.c

@@ -829,32 +829,33 @@ static int kvm_get_fp(CPUState *cs)
 static int kvm_get_vpa(CPUState *cs)
 {
     PowerPCCPU *cpu = POWERPC_CPU(cs);
-    CPUPPCState *env = &cpu->env;
+    sPAPRCPUState *spapr_cpu = spapr_cpu_state(cpu);
     struct kvm_one_reg reg;
     int ret;
 
     reg.id = KVM_REG_PPC_VPA_ADDR;
-    reg.addr = (uintptr_t)&env->vpa_addr;
+    reg.addr = (uintptr_t)&spapr_cpu->vpa_addr;
     ret = kvm_vcpu_ioctl(cs, KVM_GET_ONE_REG, &reg);
     if (ret < 0) {
         DPRINTF("Unable to get VPA address from KVM: %s\n", strerror(errno));
         return ret;
     }
 
-    assert((uintptr_t)&env->slb_shadow_size
-           == ((uintptr_t)&env->slb_shadow_addr + 8));
+    assert((uintptr_t)&spapr_cpu->slb_shadow_size
+           == ((uintptr_t)&spapr_cpu->slb_shadow_addr + 8));
     reg.id = KVM_REG_PPC_VPA_SLB;
-    reg.addr = (uintptr_t)&env->slb_shadow_addr;
+    reg.addr = (uintptr_t)&spapr_cpu->slb_shadow_addr;
     ret = kvm_vcpu_ioctl(cs, KVM_GET_ONE_REG, &reg);
     if (ret < 0) {
         DPRINTF("Unable to get SLB shadow state from KVM: %s\n",
                 strerror(errno));
         return ret;
     }
 
-    assert((uintptr_t)&env->dtl_size == ((uintptr_t)&env->dtl_addr + 8));
+    assert((uintptr_t)&spapr_cpu->dtl_size
+           == ((uintptr_t)&spapr_cpu->dtl_addr + 8));
     reg.id = KVM_REG_PPC_VPA_DTL;
-    reg.addr = (uintptr_t)&env->dtl_addr;
+    reg.addr = (uintptr_t)&spapr_cpu->dtl_addr;
     ret = kvm_vcpu_ioctl(cs, KVM_GET_ONE_REG, &reg);
     if (ret < 0) {
         DPRINTF("Unable to get dispatch trace log state from KVM: %s\n",
@@ -868,49 +869,51 @@ static int kvm_get_vpa(CPUState *cs)
 static int kvm_put_vpa(CPUState *cs)
 {
     PowerPCCPU *cpu = POWERPC_CPU(cs);
-    CPUPPCState *env = &cpu->env;
+    sPAPRCPUState *spapr_cpu = spapr_cpu_state(cpu);
     struct kvm_one_reg reg;
     int ret;
 
     /* SLB shadow or DTL can't be registered unless a master VPA is
      * registered.  That means when restoring state, if a VPA *is*
      * registered, we need to set that up first.  If not, we need to
      * deregister the others before deregistering the master VPA */
-    assert(env->vpa_addr || !(env->slb_shadow_addr || env->dtl_addr));
+    assert(spapr_cpu->vpa_addr
+           || !(spapr_cpu->slb_shadow_addr || spapr_cpu->dtl_addr));
 
-    if (env->vpa_addr) {
+    if (spapr_cpu->vpa_addr) {
         reg.id = KVM_REG_PPC_VPA_ADDR;
-        reg.addr = (uintptr_t)&env->vpa_addr;
+        reg.addr = (uintptr_t)&spapr_cpu->vpa_addr;
         ret = kvm_vcpu_ioctl(cs, KVM_SET_ONE_REG, &reg);
         if (ret < 0) {
             DPRINTF("Unable to set VPA address to KVM: %s\n", strerror(errno));
             return ret;
         }
     }
 
-    assert((uintptr_t)&env->slb_shadow_size
-           == ((uintptr_t)&env->slb_shadow_addr + 8));
+    assert((uintptr_t)&spapr_cpu->slb_shadow_size
+           == ((uintptr_t)&spapr_cpu->slb_shadow_addr + 8));
     reg.id = KVM_REG_PPC_VPA_SLB;
-    reg.addr = (uintptr_t)&env->slb_shadow_addr;
+    reg.addr = (uintptr_t)&spapr_cpu->slb_shadow_addr;
     ret = kvm_vcpu_ioctl(cs, KVM_SET_ONE_REG, &reg);
     if (ret < 0) {
         DPRINTF("Unable to set SLB shadow state to KVM: %s\n", strerror(errno));
         return ret;
     }
 
-    assert((uintptr_t)&env->dtl_size == ((uintptr_t)&env->dtl_addr + 8));
+    assert((uintptr_t)&spapr_cpu->dtl_size
+           == ((uintptr_t)&spapr_cpu->dtl_addr + 8));
     reg.id = KVM_REG_PPC_VPA_DTL;
-    reg.addr = (uintptr_t)&env->dtl_addr;
+    reg.addr = (uintptr_t)&spapr_cpu->dtl_addr;
     ret = kvm_vcpu_ioctl(cs, KVM_SET_ONE_REG, &reg);
     if (ret < 0) {
         DPRINTF("Unable to set dispatch trace log state to KVM: %s\n",
                 strerror(errno));
         return ret;
     }
 
-    if (!env->vpa_addr) {
+    if (!spapr_cpu->vpa_addr) {
         reg.id = KVM_REG_PPC_VPA_ADDR;
-        reg.addr = (uintptr_t)&env->vpa_addr;
+        reg.addr = (uintptr_t)&spapr_cpu->vpa_addr;
         ret = kvm_vcpu_ioctl(cs, KVM_SET_ONE_REG, &reg);
         if (ret < 0) {
             DPRINTF("Unable to set VPA address to KVM: %s\n", strerror(errno));

target/ppc/translate_init.inc.c

@@ -10316,14 +10316,6 @@ static void ppc_cpu_reset(CPUState *s)
     s->exception_index = POWERPC_EXCP_NONE;
     env->error_code = 0;
 
-#if defined(TARGET_PPC64) && !defined(CONFIG_USER_ONLY)
-    env->vpa_addr = 0;
-    env->slb_shadow_addr = 0;
-    env->slb_shadow_size = 0;
-    env->dtl_addr = 0;
-    env->dtl_size = 0;
-#endif /* TARGET_PPC64 */
-
     for (i = 0; i < ARRAY_SIZE(env->spr_cb); i++) {
         ppc_spr_t *spr = &env->spr_cb[i];