Merge remote-tracking branch 'remotes/dgibson/tags/ppc-for-2.9-20170301' into staging

ppc patch queue for 2017-03-01

I was hoping to get this pull request squeezed in before the soft
freeze, but I ran into some difficulties during testing.  Everything
here was at least posted before the soft freeze, so I'm hoping we can
still merge it for 2.9.

The biggest things here are:
    * Cleanups to handling of hashed page tables, that will make
      adding support for the POWER9 MMU easier
    * Cleanups to the XICS interrupt controller that will make
      implementing the powernv machine easier
    * TCG implementation of extended overflow and carry handling for
      POWER9

It also includes:
    * Increasing the CPU limit for pseries to 1024 vCPUs
    * Generating proper OF node names in qemu (making hotplug and
      coldplug logic closer together)

# gpg: Signature made Wed 01 Mar 2017 04:43:06 GMT
# gpg:                using RSA key 0x6C38CACA20D9B392
# gpg: Good signature from "David Gibson <david@gibson.dropbear.id.au>"
# gpg:                 aka "David Gibson (Red Hat) <dgibson@redhat.com>"
# gpg:                 aka "David Gibson (ozlabs.org) <dgibson@ozlabs.org>"
# gpg:                 aka "David Gibson (kernel.org) <dwg@kernel.org>"
# Primary key fingerprint: 75F4 6586 AE61 A66C C44E  87DC 6C38 CACA 20D9 B392

* remotes/dgibson/tags/ppc-for-2.9-20170301: (50 commits)
  Add PowerPC 32-bit guest memory dump support
  ppc/xics: rename 'ICPState *' variables to 'icp'
  ppc/xics: move InterruptStatsProvider to the sPAPR machine
  ppc/xics: move ics-simple post_load under the machine
  ppc/xics: remove the XICSState classes
  ppc/xics: export the XICS init routines
  ppc/xics: move the ICP array under the sPAPR machine
  ppc/xics: register the reset handler of ICP objects
  ppc/xics: simplify spapr_dt_xics() interface
  ppc/xics: use the QOM interface to grab an ICP
  ppc/xics: move the cpu_setup() handler under the ICPState class
  ppc/xics: simplify the cpu_setup() handler
  ppc/xics: move kernel_xics_fd out of KVMXICSState
  ppc/xics: extend the QOM interface to handle ICPs
  ppc/xics: remove the XICS list of ICS
  ppc/xics: register the reset handler of ICS objects
  ppc/xics: remove xics_find_source()
  ppc/xics: use the QOM interface to resend irqs
  ppc/xics: use the QOM interface to get irqs
  ppc/xics: use the QOM interface under the sPAPR machine
  ...

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

1 files changed, 52 insertions, 132 deletions

diff --git a/hw/intc/xics_kvm.c b/hw/intc/xics_kvm.c
index 17694eaa87..0a3daca3bb 100644
--- a/hw/intc/xics_kvm.c
+++ b/hw/intc/xics_kvm.c
@@ -40,16 +40,12 @@
 
 #include <sys/ioctl.h>
 
-typedef struct KVMXICSState {
-    XICSState parent_obj;
-
-    int kernel_xics_fd;
-} KVMXICSState;
+static int kernel_xics_fd = -1;
 
 /*
  * ICP-KVM
  */
-static void icp_get_kvm_state(ICPState *ss)
+static void icp_get_kvm_state(ICPState *icp)
 {
     uint64_t state;
     struct kvm_one_reg reg = {
@@ -59,25 +55,25 @@ static void icp_get_kvm_state(ICPState *ss)
     int ret;
 
     /* ICP for this CPU thread is not in use, exiting */
-    if (!ss->cs) {
+    if (!icp->cs) {
         return;
     }
 
-    ret = kvm_vcpu_ioctl(ss->cs, KVM_GET_ONE_REG, &reg);
+    ret = kvm_vcpu_ioctl(icp->cs, KVM_GET_ONE_REG, &reg);
     if (ret != 0) {
         error_report("Unable to retrieve KVM interrupt controller state"
-                " for CPU %ld: %s", kvm_arch_vcpu_id(ss->cs), strerror(errno));
+                " for CPU %ld: %s", kvm_arch_vcpu_id(icp->cs), strerror(errno));
         exit(1);
     }
 
-    ss->xirr = state >> KVM_REG_PPC_ICP_XISR_SHIFT;
-    ss->mfrr = (state >> KVM_REG_PPC_ICP_MFRR_SHIFT)
+    icp->xirr = state >> KVM_REG_PPC_ICP_XISR_SHIFT;
+    icp->mfrr = (state >> KVM_REG_PPC_ICP_MFRR_SHIFT)
         & KVM_REG_PPC_ICP_MFRR_MASK;
-    ss->pending_priority = (state >> KVM_REG_PPC_ICP_PPRI_SHIFT)
+    icp->pending_priority = (state >> KVM_REG_PPC_ICP_PPRI_SHIFT)
         & KVM_REG_PPC_ICP_PPRI_MASK;
 }
 
-static int icp_set_kvm_state(ICPState *ss, int version_id)
+static int icp_set_kvm_state(ICPState *icp, int version_id)
 {
     uint64_t state;
     struct kvm_one_reg reg = {
@@ -87,18 +83,18 @@ static int icp_set_kvm_state(ICPState *ss, int version_id)
     int ret;
 
     /* ICP for this CPU thread is not in use, exiting */
-    if (!ss->cs) {
+    if (!icp->cs) {
         return 0;
     }
 
-    state = ((uint64_t)ss->xirr << KVM_REG_PPC_ICP_XISR_SHIFT)
-        | ((uint64_t)ss->mfrr << KVM_REG_PPC_ICP_MFRR_SHIFT)
-        | ((uint64_t)ss->pending_priority << KVM_REG_PPC_ICP_PPRI_SHIFT);
+    state = ((uint64_t)icp->xirr << KVM_REG_PPC_ICP_XISR_SHIFT)
+        | ((uint64_t)icp->mfrr << KVM_REG_PPC_ICP_MFRR_SHIFT)
+        | ((uint64_t)icp->pending_priority << KVM_REG_PPC_ICP_PPRI_SHIFT);
 
-    ret = kvm_vcpu_ioctl(ss->cs, KVM_SET_ONE_REG, &reg);
+    ret = kvm_vcpu_ioctl(icp->cs, KVM_SET_ONE_REG, &reg);
     if (ret != 0) {
         error_report("Unable to restore KVM interrupt controller state (0x%"
-                PRIx64 ") for CPU %ld: %s", state, kvm_arch_vcpu_id(ss->cs),
+                PRIx64 ") for CPU %ld: %s", state, kvm_arch_vcpu_id(icp->cs),
                 strerror(errno));
         return ret;
     }
@@ -122,6 +118,34 @@ static void icp_kvm_reset(DeviceState *dev)
     icp_set_kvm_state(icp, 1);
 }
 
+static void icp_kvm_cpu_setup(ICPState *icp, PowerPCCPU *cpu)
+{
+    CPUState *cs = CPU(cpu);
+    int ret;
+
+    if (kernel_xics_fd == -1) {
+        abort();
+    }
+
+    /*
+     * If we are reusing a parked vCPU fd corresponding to the CPU
+     * which was hot-removed earlier we don't have to renable
+     * KVM_CAP_IRQ_XICS capability again.
+     */
+    if (icp->cap_irq_xics_enabled) {
+        return;
+    }
+
+    ret = kvm_vcpu_enable_cap(cs, KVM_CAP_IRQ_XICS, 0, kernel_xics_fd,
+                              kvm_arch_vcpu_id(cs));
+    if (ret < 0) {
+        error_report("Unable to connect CPU%ld to kernel XICS: %s",
+                     kvm_arch_vcpu_id(cs), strerror(errno));
+        exit(1);
+    }
+    icp->cap_irq_xics_enabled = true;
+}
+
 static void icp_kvm_class_init(ObjectClass *klass, void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
@@ -130,6 +154,7 @@ static void icp_kvm_class_init(ObjectClass *klass, void *data)
     dc->reset = icp_kvm_reset;
     icpc->pre_save = icp_get_kvm_state;
     icpc->post_load = icp_set_kvm_state;
+    icpc->cpu_setup = icp_kvm_cpu_setup;
 }
 
 static const TypeInfo icp_kvm_info = {
@@ -145,7 +170,6 @@ static const TypeInfo icp_kvm_info = {
  */
 static void ics_get_kvm_state(ICSState *ics)
 {
-    KVMXICSState *xicskvm = XICS_SPAPR_KVM(ics->xics);
     uint64_t state;
     struct kvm_device_attr attr = {
         .flags = 0,
@@ -160,7 +184,7 @@ static void ics_get_kvm_state(ICSState *ics)
 
         attr.attr = i + ics->offset;
 
-        ret = ioctl(xicskvm->kernel_xics_fd, KVM_GET_DEVICE_ATTR, &attr);
+        ret = ioctl(kernel_xics_fd, KVM_GET_DEVICE_ATTR, &attr);
         if (ret != 0) {
             error_report("Unable to retrieve KVM interrupt controller state"
                     " for IRQ %d: %s", i + ics->offset, strerror(errno));
@@ -204,7 +228,6 @@ static void ics_get_kvm_state(ICSState *ics)
 
 static int ics_set_kvm_state(ICSState *ics, int version_id)
 {
-    KVMXICSState *xicskvm = XICS_SPAPR_KVM(ics->xics);
     uint64_t state;
     struct kvm_device_attr attr = {
         .flags = 0,
@@ -238,7 +261,7 @@ static int ics_set_kvm_state(ICSState *ics, int version_id)
             }
         }
 
-        ret = ioctl(xicskvm->kernel_xics_fd, KVM_SET_DEVICE_ATTR, &attr);
+        ret = ioctl(kernel_xics_fd, KVM_SET_DEVICE_ATTR, &attr);
         if (ret != 0) {
             error_report("Unable to restore KVM interrupt controller state"
                     " for IRQs %d: %s", i + ics->offset, strerror(errno));
@@ -308,7 +331,7 @@ static void ics_kvm_class_init(ObjectClass *klass, void *data)
     DeviceClass *dc = DEVICE_CLASS(klass);
     ICSStateClass *icsc = ICS_BASE_CLASS(klass);
 
-    dc->realize = ics_kvm_realize;
+    icsc->realize = ics_kvm_realize;
     dc->reset = ics_kvm_reset;
     icsc->pre_save = ics_get_kvm_state;
     icsc->post_load = ics_set_kvm_state;
@@ -324,57 +347,6 @@ static const TypeInfo ics_kvm_info = {
 /*
  * XICS-KVM
  */
-static void xics_kvm_cpu_setup(XICSState *xics, PowerPCCPU *cpu)
-{
-    CPUState *cs;
-    ICPState *ss;
-    KVMXICSState *xicskvm = XICS_SPAPR_KVM(xics);
-    int ret;
-
-    cs = CPU(cpu);
-    ss = &xics->ss[cs->cpu_index];
-
-    assert(cs->cpu_index < xics->nr_servers);
-    if (xicskvm->kernel_xics_fd == -1) {
-        abort();
-    }
-
-    /*
-     * If we are reusing a parked vCPU fd corresponding to the CPU
-     * which was hot-removed earlier we don't have to renable
-     * KVM_CAP_IRQ_XICS capability again.
-     */
-    if (ss->cap_irq_xics_enabled) {
-        return;
-    }
-
-    ret = kvm_vcpu_enable_cap(cs, KVM_CAP_IRQ_XICS, 0, xicskvm->kernel_xics_fd,
-                              kvm_arch_vcpu_id(cs));
-    if (ret < 0) {
-        error_report("Unable to connect CPU%ld to kernel XICS: %s",
-                     kvm_arch_vcpu_id(cs), strerror(errno));
-        exit(1);
-    }
-    ss->cap_irq_xics_enabled = true;
-}
-
-static void xics_kvm_set_nr_irqs(XICSState *xics, uint32_t nr_irqs,
-                                 Error **errp)
-{
-    ICSState *ics = QLIST_FIRST(&xics->ics);
-
-    /* This needs to be deprecated ... */
-    xics->nr_irqs = nr_irqs;
-    if (ics) {
-        ics->nr_irqs = nr_irqs;
-    }
-}
-
-static void xics_kvm_set_nr_servers(XICSState *xics, uint32_t nr_servers,
-                                    Error **errp)
-{
-    xics_set_nr_servers(xics, nr_servers, TYPE_KVM_ICP, errp);
-}
 
 static void rtas_dummy(PowerPCCPU *cpu, sPAPRMachineState *spapr,
                        uint32_t token,
@@ -385,13 +357,9 @@ static void rtas_dummy(PowerPCCPU *cpu, sPAPRMachineState *spapr,
                  __func__);
 }
 
-static void xics_kvm_realize(DeviceState *dev, Error **errp)
+int xics_kvm_init(sPAPRMachineState *spapr, Error **errp)
 {
-    KVMXICSState *xicskvm = XICS_SPAPR_KVM(dev);
-    XICSState *xics = XICS_COMMON(dev);
-    ICSState *ics;
-    int i, rc;
-    Error *error = NULL;
+    int rc;
     struct kvm_create_device xics_create_device = {
         .type = KVM_DEV_TYPE_XICS,
         .flags = 0,
@@ -439,72 +407,24 @@ static void xics_kvm_realize(DeviceState *dev, Error **errp)
         goto fail;
     }
 
-    xicskvm->kernel_xics_fd = xics_create_device.fd;
-
-    QLIST_FOREACH(ics, &xics->ics, list) {
-        object_property_set_bool(OBJECT(ics), true, "realized", &error);
-        if (error) {
-            error_propagate(errp, error);
-            goto fail;
-        }
-    }
-
-    assert(xics->nr_servers);
-    for (i = 0; i < xics->nr_servers; i++) {
-        object_property_set_bool(OBJECT(&xics->ss[i]), true, "realized",
-                                 &error);
-        if (error) {
-            error_propagate(errp, error);
-            goto fail;
-        }
-    }
+    kernel_xics_fd = xics_create_device.fd;
 
     kvm_kernel_irqchip = true;
     kvm_msi_via_irqfd_allowed = true;
     kvm_gsi_direct_mapping = true;
 
-    return;
+    return rc;
 
 fail:
     kvmppc_define_rtas_kernel_token(0, "ibm,set-xive");
     kvmppc_define_rtas_kernel_token(0, "ibm,get-xive");
     kvmppc_define_rtas_kernel_token(0, "ibm,int-on");
     kvmppc_define_rtas_kernel_token(0, "ibm,int-off");
+    return -1;
 }
 
-static void xics_kvm_initfn(Object *obj)
-{
-    XICSState *xics = XICS_COMMON(obj);
-    ICSState *ics;
-
-    ics = ICS_SIMPLE(object_new(TYPE_ICS_KVM));
-    object_property_add_child(obj, "ics", OBJECT(ics), NULL);
-    ics->xics = xics;
-    QLIST_INSERT_HEAD(&xics->ics, ics, list);
-}
-
-static void xics_kvm_class_init(ObjectClass *oc, void *data)
-{
-    DeviceClass *dc = DEVICE_CLASS(oc);
-    XICSStateClass *xsc = XICS_COMMON_CLASS(oc);
-
-    dc->realize = xics_kvm_realize;
-    xsc->cpu_setup = xics_kvm_cpu_setup;
-    xsc->set_nr_irqs = xics_kvm_set_nr_irqs;
-    xsc->set_nr_servers = xics_kvm_set_nr_servers;
-}
-
-static const TypeInfo xics_spapr_kvm_info = {
-    .name          = TYPE_XICS_SPAPR_KVM,
-    .parent        = TYPE_XICS_COMMON,
-    .instance_size = sizeof(KVMXICSState),
-    .class_init    = xics_kvm_class_init,
-    .instance_init = xics_kvm_initfn,
-};
-
 static void xics_kvm_register_types(void)
 {
-    type_register_static(&xics_spapr_kvm_info);
     type_register_static(&ics_kvm_info);
     type_register_static(&icp_kvm_info);
 }