void kvmppc_core_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
{
+ struct kvmppc_vcore *vc = vcpu->arch.vcore;
+
local_paca->kvm_hstate.kvm_vcpu = vcpu;
- local_paca->kvm_hstate.kvm_vcore = vcpu->arch.vcore;
+ local_paca->kvm_hstate.kvm_vcore = vc;
+ if (vc->runner == vcpu && vc->vcore_state != VCORE_INACTIVE)
+ vc->stolen_tb += mftb() - vc->preempt_tb;
}
void kvmppc_core_vcpu_put(struct kvm_vcpu *vcpu)
{
+ struct kvmppc_vcore *vc = vcpu->arch.vcore;
+
+ if (vc->runner == vcpu && vc->vcore_state != VCORE_INACTIVE)
+ vc->preempt_tb = mftb();
}
void kvmppc_set_msr(struct kvm_vcpu *vcpu, u64 msr)
vpa->yield_count = 1;
}
+/* Length for a per-processor buffer is passed in at offset 4 in the buffer */
+struct reg_vpa {
+ u32 dummy;
+ union {
+ u16 hword;
+ u32 word;
+ } length;
+};
+
+static int vpa_is_registered(struct kvmppc_vpa *vpap)
+{
+ if (vpap->update_pending)
+ return vpap->next_gpa != 0;
+ return vpap->pinned_addr != NULL;
+}
+
static unsigned long do_h_register_vpa(struct kvm_vcpu *vcpu,
unsigned long flags,
unsigned long vcpuid, unsigned long vpa)
unsigned long len, nb;
void *va;
struct kvm_vcpu *tvcpu;
- int err = H_PARAMETER;
+ int err;
+ int subfunc;
+ struct kvmppc_vpa *vpap;
tvcpu = kvmppc_find_vcpu(kvm, vcpuid);
if (!tvcpu)
return H_PARAMETER;
- flags >>= 63 - 18;
- flags &= 7;
- if (flags == 0 || flags == 4)
- return H_PARAMETER;
- if (flags < 4) {
- if (vpa & 0x7f)
+ subfunc = (flags >> H_VPA_FUNC_SHIFT) & H_VPA_FUNC_MASK;
+ if (subfunc == H_VPA_REG_VPA || subfunc == H_VPA_REG_DTL ||
+ subfunc == H_VPA_REG_SLB) {
+ /* Registering new area - address must be cache-line aligned */
+ if ((vpa & (L1_CACHE_BYTES - 1)) || !vpa)
return H_PARAMETER;
- if (flags >= 2 && !tvcpu->arch.vpa)
- return H_RESOURCE;
- /* registering new area; convert logical addr to real */
+
+ /* convert logical addr to kernel addr and read length */
va = kvmppc_pin_guest_page(kvm, vpa, &nb);
if (va == NULL)
return H_PARAMETER;
- if (flags <= 1)
- len = *(unsigned short *)(va + 4);
+ if (subfunc == H_VPA_REG_VPA)
+ len = ((struct reg_vpa *)va)->length.hword;
else
- len = *(unsigned int *)(va + 4);
- if (len > nb)
- goto out_unpin;
- switch (flags) {
- case 1: /* register VPA */
- if (len < 640)
- goto out_unpin;
- if (tvcpu->arch.vpa)
- kvmppc_unpin_guest_page(kvm, vcpu->arch.vpa);
- tvcpu->arch.vpa = va;
- init_vpa(vcpu, va);
- break;
- case 2: /* register DTL */
- if (len < 48)
- goto out_unpin;
- len -= len % 48;
- if (tvcpu->arch.dtl)
- kvmppc_unpin_guest_page(kvm, vcpu->arch.dtl);
- tvcpu->arch.dtl = va;
- tvcpu->arch.dtl_end = va + len;
+ len = ((struct reg_vpa *)va)->length.word;
+ kvmppc_unpin_guest_page(kvm, va);
+
+ /* Check length */
+ if (len > nb || len < sizeof(struct reg_vpa))
+ return H_PARAMETER;
+ } else {
+ vpa = 0;
+ len = 0;
+ }
+
+ err = H_PARAMETER;
+ vpap = NULL;
+ spin_lock(&tvcpu->arch.vpa_update_lock);
+
+ switch (subfunc) {
+ case H_VPA_REG_VPA: /* register VPA */
+ if (len < sizeof(struct lppaca))
break;
- case 3: /* register SLB shadow buffer */
- if (len < 16)
- goto out_unpin;
- if (tvcpu->arch.slb_shadow)
- kvmppc_unpin_guest_page(kvm, vcpu->arch.slb_shadow);
- tvcpu->arch.slb_shadow = va;
+ vpap = &tvcpu->arch.vpa;
+ err = 0;
+ break;
+
+ case H_VPA_REG_DTL: /* register DTL */
+ if (len < sizeof(struct dtl_entry))
break;
- }
- } else {
- switch (flags) {
- case 5: /* unregister VPA */
- if (tvcpu->arch.slb_shadow || tvcpu->arch.dtl)
- return H_RESOURCE;
- if (!tvcpu->arch.vpa)
- break;
- kvmppc_unpin_guest_page(kvm, tvcpu->arch.vpa);
- tvcpu->arch.vpa = NULL;
+ len -= len % sizeof(struct dtl_entry);
+
+ /* Check that they have previously registered a VPA */
+ err = H_RESOURCE;
+ if (!vpa_is_registered(&tvcpu->arch.vpa))
break;
- case 6: /* unregister DTL */
- if (!tvcpu->arch.dtl)
- break;
- kvmppc_unpin_guest_page(kvm, tvcpu->arch.dtl);
- tvcpu->arch.dtl = NULL;
+
+ vpap = &tvcpu->arch.dtl;
+ err = 0;
+ break;
+
+ case H_VPA_REG_SLB: /* register SLB shadow buffer */
+ /* Check that they have previously registered a VPA */
+ err = H_RESOURCE;
+ if (!vpa_is_registered(&tvcpu->arch.vpa))
break;
- case 7: /* unregister SLB shadow buffer */
- if (!tvcpu->arch.slb_shadow)
- break;
- kvmppc_unpin_guest_page(kvm, tvcpu->arch.slb_shadow);
- tvcpu->arch.slb_shadow = NULL;
+
+ vpap = &tvcpu->arch.slb_shadow;
+ err = 0;
+ break;
+
+ case H_VPA_DEREG_VPA: /* deregister VPA */
+ /* Check they don't still have a DTL or SLB buf registered */
+ err = H_RESOURCE;
+ if (vpa_is_registered(&tvcpu->arch.dtl) ||
+ vpa_is_registered(&tvcpu->arch.slb_shadow))
break;
- }
+
+ vpap = &tvcpu->arch.vpa;
+ err = 0;
+ break;
+
+ case H_VPA_DEREG_DTL: /* deregister DTL */
+ vpap = &tvcpu->arch.dtl;
+ err = 0;
+ break;
+
+ case H_VPA_DEREG_SLB: /* deregister SLB shadow buffer */
+ vpap = &tvcpu->arch.slb_shadow;
+ err = 0;
+ break;
+ }
+
+ if (vpap) {
+ vpap->next_gpa = vpa;
+ vpap->len = len;
+ vpap->update_pending = 1;
}
- return H_SUCCESS;
- out_unpin:
- kvmppc_unpin_guest_page(kvm, va);
+ spin_unlock(&tvcpu->arch.vpa_update_lock);
+
return err;
}
+static void kvmppc_update_vpa(struct kvm *kvm, struct kvmppc_vpa *vpap)
+{
+ void *va;
+ unsigned long nb;
+
+ vpap->update_pending = 0;
+ va = NULL;
+ if (vpap->next_gpa) {
+ va = kvmppc_pin_guest_page(kvm, vpap->next_gpa, &nb);
+ if (nb < vpap->len) {
+ /*
+ * If it's now too short, it must be that userspace
+ * has changed the mappings underlying guest memory,
+ * so unregister the region.
+ */
+ kvmppc_unpin_guest_page(kvm, va);
+ va = NULL;
+ }
+ }
+ if (vpap->pinned_addr)
+ kvmppc_unpin_guest_page(kvm, vpap->pinned_addr);
+ vpap->pinned_addr = va;
+ if (va)
+ vpap->pinned_end = va + vpap->len;
+}
+
+static void kvmppc_update_vpas(struct kvm_vcpu *vcpu)
+{
+ struct kvm *kvm = vcpu->kvm;
+
+ spin_lock(&vcpu->arch.vpa_update_lock);
+ if (vcpu->arch.vpa.update_pending) {
+ kvmppc_update_vpa(kvm, &vcpu->arch.vpa);
+ init_vpa(vcpu, vcpu->arch.vpa.pinned_addr);
+ }
+ if (vcpu->arch.dtl.update_pending) {
+ kvmppc_update_vpa(kvm, &vcpu->arch.dtl);
+ vcpu->arch.dtl_ptr = vcpu->arch.dtl.pinned_addr;
+ vcpu->arch.dtl_index = 0;
+ }
+ if (vcpu->arch.slb_shadow.update_pending)
+ kvmppc_update_vpa(kvm, &vcpu->arch.slb_shadow);
+ spin_unlock(&vcpu->arch.vpa_update_lock);
+}
+
+static void kvmppc_create_dtl_entry(struct kvm_vcpu *vcpu,
+ struct kvmppc_vcore *vc)
+{
+ struct dtl_entry *dt;
+ struct lppaca *vpa;
+ unsigned long old_stolen;
+
+ dt = vcpu->arch.dtl_ptr;
+ vpa = vcpu->arch.vpa.pinned_addr;
+ old_stolen = vcpu->arch.stolen_logged;
+ vcpu->arch.stolen_logged = vc->stolen_tb;
+ if (!dt || !vpa)
+ return;
+ memset(dt, 0, sizeof(struct dtl_entry));
+ dt->dispatch_reason = 7;
+ dt->processor_id = vc->pcpu + vcpu->arch.ptid;
+ dt->timebase = mftb();
+ dt->enqueue_to_dispatch_time = vc->stolen_tb - old_stolen;
+ dt->srr0 = kvmppc_get_pc(vcpu);
+ dt->srr1 = vcpu->arch.shregs.msr;
+ ++dt;
+ if (dt == vcpu->arch.dtl.pinned_end)
+ dt = vcpu->arch.dtl.pinned_addr;
+ vcpu->arch.dtl_ptr = dt;
+ /* order writing *dt vs. writing vpa->dtl_idx */
+ smp_wmb();
+ vpa->dtl_idx = ++vcpu->arch.dtl_index;
+}
+
int kvmppc_pseries_do_hcall(struct kvm_vcpu *vcpu)
{
unsigned long req = kvmppc_get_gpr(vcpu, 3);
/* default to host PVR, since we can't spoof it */
vcpu->arch.pvr = mfspr(SPRN_PVR);
kvmppc_set_pvr(vcpu, vcpu->arch.pvr);
+ spin_lock_init(&vcpu->arch.vpa_update_lock);
kvmppc_mmu_book3s_hv_init(vcpu);
INIT_LIST_HEAD(&vcore->runnable_threads);
spin_lock_init(&vcore->lock);
init_waitqueue_head(&vcore->wq);
+ vcore->preempt_tb = mftb();
}
kvm->arch.vcores[core] = vcore;
}
++vcore->num_threads;
spin_unlock(&vcore->lock);
vcpu->arch.vcore = vcore;
+ vcpu->arch.stolen_logged = vcore->stolen_tb;
vcpu->arch.cpu_type = KVM_CPU_3S_64;
kvmppc_sanity_check(vcpu);
void kvmppc_core_vcpu_free(struct kvm_vcpu *vcpu)
{
- if (vcpu->arch.dtl)
- kvmppc_unpin_guest_page(vcpu->kvm, vcpu->arch.dtl);
- if (vcpu->arch.slb_shadow)
- kvmppc_unpin_guest_page(vcpu->kvm, vcpu->arch.slb_shadow);
- if (vcpu->arch.vpa)
- kvmppc_unpin_guest_page(vcpu->kvm, vcpu->arch.vpa);
+ spin_lock(&vcpu->arch.vpa_update_lock);
+ if (vcpu->arch.dtl.pinned_addr)
+ kvmppc_unpin_guest_page(vcpu->kvm, vcpu->arch.dtl.pinned_addr);
+ if (vcpu->arch.slb_shadow.pinned_addr)
+ kvmppc_unpin_guest_page(vcpu->kvm, vcpu->arch.slb_shadow.pinned_addr);
+ if (vcpu->arch.vpa.pinned_addr)
+ kvmppc_unpin_guest_page(vcpu->kvm, vcpu->arch.vpa.pinned_addr);
+ spin_unlock(&vcpu->arch.vpa_update_lock);
kvm_vcpu_uninit(vcpu);
kmem_cache_free(kvm_vcpu_cache, vcpu);
}
list_del(&vcpu->arch.run_list);
}
+static int kvmppc_grab_hwthread(int cpu)
+{
+ struct paca_struct *tpaca;
+ long timeout = 1000;
+
+ tpaca = &paca[cpu];
+
+ /* Ensure the thread won't go into the kernel if it wakes */
+ tpaca->kvm_hstate.hwthread_req = 1;
+
+ /*
+ * If the thread is already executing in the kernel (e.g. handling
+ * a stray interrupt), wait for it to get back to nap mode.
+ * The smp_mb() is to ensure that our setting of hwthread_req
+ * is visible before we look at hwthread_state, so if this
+ * races with the code at system_reset_pSeries and the thread
+ * misses our setting of hwthread_req, we are sure to see its
+ * setting of hwthread_state, and vice versa.
+ */
+ smp_mb();
+ while (tpaca->kvm_hstate.hwthread_state == KVM_HWTHREAD_IN_KERNEL) {
+ if (--timeout <= 0) {
+ pr_err("KVM: couldn't grab cpu %d\n", cpu);
+ return -EBUSY;
+ }
+ udelay(1);
+ }
+ return 0;
+}
+
+static void kvmppc_release_hwthread(int cpu)
+{
+ struct paca_struct *tpaca;
+
+ tpaca = &paca[cpu];
+ tpaca->kvm_hstate.hwthread_req = 0;
+ tpaca->kvm_hstate.kvm_vcpu = NULL;
+}
+
static void kvmppc_start_thread(struct kvm_vcpu *vcpu)
{
int cpu;
smp_wmb();
#if defined(CONFIG_PPC_ICP_NATIVE) && defined(CONFIG_SMP)
if (vcpu->arch.ptid) {
- tpaca->cpu_start = 0x80;
- wmb();
+ kvmppc_grab_hwthread(cpu);
xics_wake_cpu(cpu);
++vc->n_woken;
}
struct kvm_vcpu *vcpu, *vcpu0, *vnext;
long ret;
u64 now;
- int ptid;
+ int ptid, i;
/* don't start if any threads have a signal pending */
list_for_each_entry(vcpu, &vc->runnable_threads, arch.run_list)
vc->nap_count = 0;
vc->entry_exit_count = 0;
vc->vcore_state = VCORE_RUNNING;
+ vc->stolen_tb += mftb() - vc->preempt_tb;
vc->in_guest = 0;
vc->pcpu = smp_processor_id();
vc->napping_threads = 0;
- list_for_each_entry(vcpu, &vc->runnable_threads, arch.run_list)
+ list_for_each_entry(vcpu, &vc->runnable_threads, arch.run_list) {
kvmppc_start_thread(vcpu);
+ if (vcpu->arch.vpa.update_pending ||
+ vcpu->arch.slb_shadow.update_pending ||
+ vcpu->arch.dtl.update_pending)
+ kvmppc_update_vpas(vcpu);
+ kvmppc_create_dtl_entry(vcpu, vc);
+ }
+ /* Grab any remaining hw threads so they can't go into the kernel */
+ for (i = ptid; i < threads_per_core; ++i)
+ kvmppc_grab_hwthread(vc->pcpu + i);
preempt_disable();
spin_unlock(&vc->lock);
kvm_guest_enter();
__kvmppc_vcore_entry(NULL, vcpu0);
+ for (i = 0; i < threads_per_core; ++i)
+ kvmppc_release_hwthread(vc->pcpu + i);
spin_lock(&vc->lock);
/* disable sending of IPIs on virtual external irqs */
spin_lock(&vc->lock);
out:
vc->vcore_state = VCORE_INACTIVE;
+ vc->preempt_tb = mftb();
list_for_each_entry_safe(vcpu, vnext, &vc->runnable_threads,
arch.run_list) {
if (vcpu->arch.ret != RESUME_GUEST) {
spin_lock(&vc->lock);
continue;
}
+ vc->runner = vcpu;
n_ceded = 0;
list_for_each_entry(v, &vc->runnable_threads, arch.run_list)
n_ceded += v->arch.ceded;
wake_up(&v->arch.cpu_run);
}
}
+ vc->runner = NULL;
}
if (signal_pending(current)) {
return r;
}
-static long kvmppc_stt_npages(unsigned long window_size)
-{
- return ALIGN((window_size >> SPAPR_TCE_SHIFT)
- * sizeof(u64), PAGE_SIZE) / PAGE_SIZE;
-}
-
-static void release_spapr_tce_table(struct kvmppc_spapr_tce_table *stt)
-{
- struct kvm *kvm = stt->kvm;
- int i;
-
- mutex_lock(&kvm->lock);
- list_del(&stt->list);
- for (i = 0; i < kvmppc_stt_npages(stt->window_size); i++)
- __free_page(stt->pages[i]);
- kfree(stt);
- mutex_unlock(&kvm->lock);
-
- kvm_put_kvm(kvm);
-}
-
-static int kvm_spapr_tce_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
-{
- struct kvmppc_spapr_tce_table *stt = vma->vm_file->private_data;
- struct page *page;
-
- if (vmf->pgoff >= kvmppc_stt_npages(stt->window_size))
- return VM_FAULT_SIGBUS;
-
- page = stt->pages[vmf->pgoff];
- get_page(page);
- vmf->page = page;
- return 0;
-}
-
-static const struct vm_operations_struct kvm_spapr_tce_vm_ops = {
- .fault = kvm_spapr_tce_fault,
-};
-
-static int kvm_spapr_tce_mmap(struct file *file, struct vm_area_struct *vma)
-{
- vma->vm_ops = &kvm_spapr_tce_vm_ops;
- return 0;
-}
-
-static int kvm_spapr_tce_release(struct inode *inode, struct file *filp)
-{
- struct kvmppc_spapr_tce_table *stt = filp->private_data;
-
- release_spapr_tce_table(stt);
- return 0;
-}
-
-static struct file_operations kvm_spapr_tce_fops = {
- .mmap = kvm_spapr_tce_mmap,
- .release = kvm_spapr_tce_release,
-};
-
-long kvm_vm_ioctl_create_spapr_tce(struct kvm *kvm,
- struct kvm_create_spapr_tce *args)
-{
- struct kvmppc_spapr_tce_table *stt = NULL;
- long npages;
- int ret = -ENOMEM;
- int i;
-
- /* Check this LIOBN hasn't been previously allocated */
- list_for_each_entry(stt, &kvm->arch.spapr_tce_tables, list) {
- if (stt->liobn == args->liobn)
- return -EBUSY;
- }
-
- npages = kvmppc_stt_npages(args->window_size);
-
- stt = kzalloc(sizeof(*stt) + npages* sizeof(struct page *),
- GFP_KERNEL);
- if (!stt)
- goto fail;
-
- stt->liobn = args->liobn;
- stt->window_size = args->window_size;
- stt->kvm = kvm;
-
- for (i = 0; i < npages; i++) {
- stt->pages[i] = alloc_page(GFP_KERNEL | __GFP_ZERO);
- if (!stt->pages[i])
- goto fail;
- }
-
- kvm_get_kvm(kvm);
-
- mutex_lock(&kvm->lock);
- list_add(&stt->list, &kvm->arch.spapr_tce_tables);
-
- mutex_unlock(&kvm->lock);
-
- return anon_inode_getfd("kvm-spapr-tce", &kvm_spapr_tce_fops,
- stt, O_RDWR);
-
-fail:
- if (stt) {
- for (i = 0; i < npages; i++)
- if (stt->pages[i])
- __free_page(stt->pages[i]);
-
- kfree(stt);
- }
- return ret;
-}
/* Work out RMLS (real mode limit selector) field value for a given RMA size.
Assumes POWER7 or PPC970. */
return fd;
}
+static void kvmppc_add_seg_page_size(struct kvm_ppc_one_seg_page_size **sps,
+ int linux_psize)
+{
+ struct mmu_psize_def *def = &mmu_psize_defs[linux_psize];
+
+ if (!def->shift)
+ return;
+ (*sps)->page_shift = def->shift;
+ (*sps)->slb_enc = def->sllp;
+ (*sps)->enc[0].page_shift = def->shift;
+ (*sps)->enc[0].pte_enc = def->penc;
+ (*sps)++;
+}
+
+int kvm_vm_ioctl_get_smmu_info(struct kvm *kvm, struct kvm_ppc_smmu_info *info)
+{
+ struct kvm_ppc_one_seg_page_size *sps;
+
+ info->flags = KVM_PPC_PAGE_SIZES_REAL;
+ if (mmu_has_feature(MMU_FTR_1T_SEGMENT))
+ info->flags |= KVM_PPC_1T_SEGMENTS;
+ info->slb_size = mmu_slb_size;
+
+ /* We only support these sizes for now, and no muti-size segments */
+ sps = &info->sps[0];
+ kvmppc_add_seg_page_size(&sps, MMU_PAGE_4K);
+ kvmppc_add_seg_page_size(&sps, MMU_PAGE_64K);
+ kvmppc_add_seg_page_size(&sps, MMU_PAGE_16M);
+
+ return 0;
+}
+
/*
* Get (and clear) the dirty memory log for a memory slot.
*/
return EMULATE_FAIL;
}
-int kvmppc_core_emulate_mtspr(struct kvm_vcpu *vcpu, int sprn, int rs)
+int kvmppc_core_emulate_mtspr(struct kvm_vcpu *vcpu, int sprn, ulong spr_val)
{
return EMULATE_FAIL;
}
-int kvmppc_core_emulate_mfspr(struct kvm_vcpu *vcpu, int sprn, int rt)
+int kvmppc_core_emulate_mfspr(struct kvm_vcpu *vcpu, int sprn, ulong *spr_val)
{
return EMULATE_FAIL;
}
Code Review / linux-3.10.git / blobdiff