/* Used as a "null" value for timebase values */
#define TB_NIL (~(u64)0)
+static DECLARE_BITMAP(default_enabled_hcalls, MAX_HCALL_OPCODE/4 + 1);
+
static void kvmppc_end_cede(struct kvm_vcpu *vcpu);
static int kvmppc_hv_setup_htab_rma(struct kvm_vcpu *vcpu);
vcpu->arch.dtl.dirty = true;
}
+static bool kvmppc_power8_compatible(struct kvm_vcpu *vcpu)
+{
+ if (vcpu->arch.vcore->arch_compat >= PVR_ARCH_207)
+ return true;
+ if ((!vcpu->arch.vcore->arch_compat) &&
+ cpu_has_feature(CPU_FTR_ARCH_207S))
+ return true;
+ return false;
+}
+
+static int kvmppc_h_set_mode(struct kvm_vcpu *vcpu, unsigned long mflags,
+ unsigned long resource, unsigned long value1,
+ unsigned long value2)
+{
+ switch (resource) {
+ case H_SET_MODE_RESOURCE_SET_CIABR:
+ if (!kvmppc_power8_compatible(vcpu))
+ return H_P2;
+ if (value2)
+ return H_P4;
+ if (mflags)
+ return H_UNSUPPORTED_FLAG_START;
+ /* Guests can't breakpoint the hypervisor */
+ if ((value1 & CIABR_PRIV) == CIABR_PRIV_HYPER)
+ return H_P3;
+ vcpu->arch.ciabr = value1;
+ return H_SUCCESS;
+ case H_SET_MODE_RESOURCE_SET_DAWR:
+ if (!kvmppc_power8_compatible(vcpu))
+ return H_P2;
+ if (mflags)
+ return H_UNSUPPORTED_FLAG_START;
+ if (value2 & DABRX_HYP)
+ return H_P4;
+ vcpu->arch.dawr = value1;
+ vcpu->arch.dawrx = value2;
+ return H_SUCCESS;
+ default:
+ return H_TOO_HARD;
+ }
+}
+
int kvmppc_pseries_do_hcall(struct kvm_vcpu *vcpu)
{
unsigned long req = kvmppc_get_gpr(vcpu, 3);
struct kvm_vcpu *tvcpu;
int idx, rc;
+ if (req <= MAX_HCALL_OPCODE &&
+ !test_bit(req/4, vcpu->kvm->arch.enabled_hcalls))
+ return RESUME_HOST;
+
switch (req) {
case H_ENTER:
idx = srcu_read_lock(&vcpu->kvm->srcu);
/* Send the error out to userspace via KVM_RUN */
return rc;
-
+ case H_SET_MODE:
+ ret = kvmppc_h_set_mode(vcpu, kvmppc_get_gpr(vcpu, 4),
+ kvmppc_get_gpr(vcpu, 5),
+ kvmppc_get_gpr(vcpu, 6),
+ kvmppc_get_gpr(vcpu, 7));
+ if (ret == H_TOO_HARD)
+ return RESUME_HOST;
+ break;
case H_XIRR:
case H_CPPR:
case H_EOI:
return RESUME_GUEST;
}
+static int kvmppc_hcall_impl_hv(unsigned long cmd)
+{
+ switch (cmd) {
+ case H_CEDE:
+ case H_PROD:
+ case H_CONFER:
+ case H_REGISTER_VPA:
+ case H_SET_MODE:
+#ifdef CONFIG_KVM_XICS
+ case H_XIRR:
+ case H_CPPR:
+ case H_EOI:
+ case H_IPI:
+ case H_IPOLL:
+ case H_XIRR_X:
+#endif
+ return 1;
+ }
+
+ /* See if it's in the real-mode table */
+ return kvmppc_hcall_impl_hv_realmode(cmd);
+}
+
static int kvmppc_handle_exit_hv(struct kvm_run *run, struct kvm_vcpu *vcpu,
struct task_struct *tsk)
{
case KVM_REG_PPC_CIABR:
*val = get_reg_val(id, vcpu->arch.ciabr);
break;
- case KVM_REG_PPC_IC:
- *val = get_reg_val(id, vcpu->arch.ic);
- break;
- case KVM_REG_PPC_VTB:
- *val = get_reg_val(id, vcpu->arch.vtb);
- break;
case KVM_REG_PPC_CSIGR:
*val = get_reg_val(id, vcpu->arch.csigr);
break;
if ((vcpu->arch.ciabr & CIABR_PRIV) == CIABR_PRIV_HYPER)
vcpu->arch.ciabr &= ~CIABR_PRIV; /* disable */
break;
- case KVM_REG_PPC_IC:
- vcpu->arch.ic = set_reg_val(id, *val);
- break;
- case KVM_REG_PPC_VTB:
- vcpu->arch.vtb = set_reg_val(id, *val);
- break;
case KVM_REG_PPC_CSIGR:
vcpu->arch.csigr = set_reg_val(id, *val);
break;
int core;
struct kvmppc_vcore *vcore;
- core = id / threads_per_core;
+ core = id / threads_per_subcore;
if (core >= KVM_MAX_VCORES)
goto out;
init_waitqueue_head(&vcore->wq);
vcore->preempt_tb = TB_NIL;
vcore->lpcr = kvm->arch.lpcr;
- vcore->first_vcpuid = core * threads_per_core;
+ vcore->first_vcpuid = core * threads_per_subcore;
vcore->kvm = kvm;
}
kvm->arch.vcores[core] = vcore;
static int on_primary_thread(void)
{
int cpu = smp_processor_id();
- int thr = cpu_thread_in_core(cpu);
+ int thr;
- if (thr)
+ /* Are we on a primary subcore? */
+ if (cpu_thread_in_subcore(cpu))
return 0;
- while (++thr < threads_per_core)
+
+ thr = 0;
+ while (++thr < threads_per_subcore)
if (cpu_online(cpu + thr))
return 0;
/* Grab all hw threads so they can't go into the kernel */
- for (thr = 1; thr < threads_per_core; ++thr) {
+ for (thr = 1; thr < threads_per_subcore; ++thr) {
if (kvmppc_grab_hwthread(cpu + thr)) {
/* Couldn't grab one; let the others go */
do {
}
/*
- * Make sure we are running on thread 0, and that
- * secondary threads are offline.
+ * Make sure we are running on primary threads, and that secondary
+ * threads are offline. Also check if the number of threads in this
+ * guest are greater than the current system threads per guest.
*/
- if (threads_per_core > 1 && !on_primary_thread()) {
+ if ((threads_per_core > 1) &&
+ ((vc->num_threads > threads_per_subcore) || !on_primary_thread())) {
list_for_each_entry(vcpu, &vc->runnable_threads, arch.run_list)
vcpu->arch.ret = -EBUSY;
goto out;
}
+
vc->pcpu = smp_processor_id();
list_for_each_entry(vcpu, &vc->runnable_threads, arch.run_list) {
kvmppc_start_thread(vcpu);
/* wait for secondary threads to finish writing their state to memory */
if (vc->nap_count < vc->n_woken)
kvmppc_wait_for_nap(vc);
- for (i = 0; i < threads_per_core; ++i)
+ for (i = 0; i < threads_per_subcore; ++i)
kvmppc_release_hwthread(vc->pcpu + i);
/* prevent other vcpu threads from doing kvmppc_start_thread() now */
vc->vcore_state = VCORE_EXITING;
*/
cpumask_setall(&kvm->arch.need_tlb_flush);
+ /* Start out with the default set of hcalls enabled */
+ memcpy(kvm->arch.enabled_hcalls, default_enabled_hcalls,
+ sizeof(kvm->arch.enabled_hcalls));
+
kvm->arch.rma = NULL;
kvm->arch.host_sdr1 = mfspr(SPRN_SDR1);
spin_lock_init(&kvm->arch.slot_phys_lock);
/*
- * Don't allow secondary CPU threads to come online
- * while any KVM VMs exist.
+ * Track that we now have a HV mode VM active. This blocks secondary
+ * CPU threads from coming online.
*/
- inhibit_secondary_onlining();
+ kvm_hv_vm_activated();
return 0;
}
static void kvmppc_core_destroy_vm_hv(struct kvm *kvm)
{
- uninhibit_secondary_onlining();
+ kvm_hv_vm_deactivated();
kvmppc_free_vcores(kvm);
if (kvm->arch.rma) {
return r;
}
+/*
+ * List of hcall numbers to enable by default.
+ * For compatibility with old userspace, we enable by default
+ * all hcalls that were implemented before the hcall-enabling
+ * facility was added. Note this list should not include H_RTAS.
+ */
+static unsigned int default_hcall_list[] = {
+ H_REMOVE,
+ H_ENTER,
+ H_READ,
+ H_PROTECT,
+ H_BULK_REMOVE,
+ H_GET_TCE,
+ H_PUT_TCE,
+ H_SET_DABR,
+ H_SET_XDABR,
+ H_CEDE,
+ H_PROD,
+ H_CONFER,
+ H_REGISTER_VPA,
+#ifdef CONFIG_KVM_XICS
+ H_EOI,
+ H_CPPR,
+ H_IPI,
+ H_IPOLL,
+ H_XIRR,
+ H_XIRR_X,
+#endif
+ 0
+};
+
+static void init_default_hcalls(void)
+{
+ int i;
+ unsigned int hcall;
+
+ for (i = 0; default_hcall_list[i]; ++i) {
+ hcall = default_hcall_list[i];
+ WARN_ON(!kvmppc_hcall_impl_hv(hcall));
+ __set_bit(hcall / 4, default_enabled_hcalls);
+ }
+}
+
static struct kvmppc_ops kvm_ops_hv = {
.get_sregs = kvm_arch_vcpu_ioctl_get_sregs_hv,
.set_sregs = kvm_arch_vcpu_ioctl_set_sregs_hv,
.emulate_mfspr = kvmppc_core_emulate_mfspr_hv,
.fast_vcpu_kick = kvmppc_fast_vcpu_kick_hv,
.arch_vm_ioctl = kvm_arch_vm_ioctl_hv,
+ .hcall_implemented = kvmppc_hcall_impl_hv,
};
static int kvmppc_book3s_init_hv(void)
kvm_ops_hv.owner = THIS_MODULE;
kvmppc_hv_ops = &kvm_ops_hv;
+ init_default_hcalls();
+
r = kvmppc_mmu_hv_init();
return r;
}
projects / deliverable / linux.git / blobdiff