#include <linux/cpumask.h>
#include <linux/spinlock.h>
#include <linux/page-flags.h>
+#include <linux/srcu.h>
#include <asm/reg.h>
#include <asm/cputable.h>
vpa->yield_count = 1;
}
+static int set_vpa(struct kvm_vcpu *vcpu, struct kvmppc_vpa *v,
+ unsigned long addr, unsigned long len)
+{
+ /* check address is cacheline aligned */
+ if (addr & (L1_CACHE_BYTES - 1))
+ return -EINVAL;
+ spin_lock(&vcpu->arch.vpa_update_lock);
+ if (v->next_gpa != addr || v->len != len) {
+ v->next_gpa = addr;
+ v->len = addr ? len : 0;
+ v->update_pending = 1;
+ }
+ spin_unlock(&vcpu->arch.vpa_update_lock);
+ return 0;
+}
+
/* Length for a per-processor buffer is passed in at offset 4 in the buffer */
struct reg_vpa {
u32 dummy;
spin_lock(&vcpu->arch.vpa_update_lock);
if (vcpu->arch.vpa.update_pending) {
kvmppc_update_vpa(vcpu, &vcpu->arch.vpa);
- init_vpa(vcpu, vcpu->arch.vpa.pinned_addr);
+ if (vcpu->arch.vpa.pinned_addr)
+ init_vpa(vcpu, vcpu->arch.vpa.pinned_addr);
}
if (vcpu->arch.dtl.update_pending) {
kvmppc_update_vpa(vcpu, &vcpu->arch.dtl);
unsigned long req = kvmppc_get_gpr(vcpu, 3);
unsigned long target, ret = H_SUCCESS;
struct kvm_vcpu *tvcpu;
+ int idx;
switch (req) {
case H_ENTER:
+ idx = srcu_read_lock(&vcpu->kvm->srcu);
ret = kvmppc_virtmode_h_enter(vcpu, kvmppc_get_gpr(vcpu, 4),
kvmppc_get_gpr(vcpu, 5),
kvmppc_get_gpr(vcpu, 6),
kvmppc_get_gpr(vcpu, 7));
+ srcu_read_unlock(&vcpu->kvm->srcu, idx);
break;
case H_CEDE:
break;
struct task_struct *tsk)
{
int r = RESUME_HOST;
+ int srcu_idx;
vcpu->stat.sum_exits++;
* have been handled already.
*/
case BOOK3S_INTERRUPT_H_DATA_STORAGE:
+ srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
r = kvmppc_book3s_hv_page_fault(run, vcpu,
vcpu->arch.fault_dar, vcpu->arch.fault_dsisr);
+ srcu_read_unlock(&vcpu->kvm->srcu, srcu_idx);
break;
case BOOK3S_INTERRUPT_H_INST_STORAGE:
+ srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
r = kvmppc_book3s_hv_page_fault(run, vcpu,
kvmppc_get_pc(vcpu), 0);
+ srcu_read_unlock(&vcpu->kvm->srcu, srcu_idx);
break;
/*
* This occurs if the guest executes an illegal instruction.
return 0;
}
-int kvm_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg)
+int kvmppc_get_one_reg(struct kvm_vcpu *vcpu, u64 id, union kvmppc_one_reg *val)
{
- int r = -EINVAL;
+ int r = 0;
+ long int i;
- switch (reg->id) {
+ switch (id) {
case KVM_REG_PPC_HIOR:
- r = put_user(0, (u64 __user *)reg->addr);
+ *val = get_reg_val(id, 0);
+ break;
+ case KVM_REG_PPC_DABR:
+ *val = get_reg_val(id, vcpu->arch.dabr);
+ break;
+ case KVM_REG_PPC_DSCR:
+ *val = get_reg_val(id, vcpu->arch.dscr);
+ break;
+ case KVM_REG_PPC_PURR:
+ *val = get_reg_val(id, vcpu->arch.purr);
+ break;
+ case KVM_REG_PPC_SPURR:
+ *val = get_reg_val(id, vcpu->arch.spurr);
+ break;
+ case KVM_REG_PPC_AMR:
+ *val = get_reg_val(id, vcpu->arch.amr);
+ break;
+ case KVM_REG_PPC_UAMOR:
+ *val = get_reg_val(id, vcpu->arch.uamor);
+ break;
+ case KVM_REG_PPC_MMCR0 ... KVM_REG_PPC_MMCRA:
+ i = id - KVM_REG_PPC_MMCR0;
+ *val = get_reg_val(id, vcpu->arch.mmcr[i]);
+ break;
+ case KVM_REG_PPC_PMC1 ... KVM_REG_PPC_PMC8:
+ i = id - KVM_REG_PPC_PMC1;
+ *val = get_reg_val(id, vcpu->arch.pmc[i]);
+ break;
+#ifdef CONFIG_VSX
+ case KVM_REG_PPC_FPR0 ... KVM_REG_PPC_FPR31:
+ if (cpu_has_feature(CPU_FTR_VSX)) {
+ /* VSX => FP reg i is stored in arch.vsr[2*i] */
+ long int i = id - KVM_REG_PPC_FPR0;
+ *val = get_reg_val(id, vcpu->arch.vsr[2 * i]);
+ } else {
+ /* let generic code handle it */
+ r = -EINVAL;
+ }
+ break;
+ case KVM_REG_PPC_VSR0 ... KVM_REG_PPC_VSR31:
+ if (cpu_has_feature(CPU_FTR_VSX)) {
+ long int i = id - KVM_REG_PPC_VSR0;
+ val->vsxval[0] = vcpu->arch.vsr[2 * i];
+ val->vsxval[1] = vcpu->arch.vsr[2 * i + 1];
+ } else {
+ r = -ENXIO;
+ }
+ break;
+#endif /* CONFIG_VSX */
+ case KVM_REG_PPC_VPA_ADDR:
+ spin_lock(&vcpu->arch.vpa_update_lock);
+ *val = get_reg_val(id, vcpu->arch.vpa.next_gpa);
+ spin_unlock(&vcpu->arch.vpa_update_lock);
+ break;
+ case KVM_REG_PPC_VPA_SLB:
+ spin_lock(&vcpu->arch.vpa_update_lock);
+ val->vpaval.addr = vcpu->arch.slb_shadow.next_gpa;
+ val->vpaval.length = vcpu->arch.slb_shadow.len;
+ spin_unlock(&vcpu->arch.vpa_update_lock);
+ break;
+ case KVM_REG_PPC_VPA_DTL:
+ spin_lock(&vcpu->arch.vpa_update_lock);
+ val->vpaval.addr = vcpu->arch.dtl.next_gpa;
+ val->vpaval.length = vcpu->arch.dtl.len;
+ spin_unlock(&vcpu->arch.vpa_update_lock);
break;
default:
+ r = -EINVAL;
break;
}
return r;
}
-int kvm_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg)
+int kvmppc_set_one_reg(struct kvm_vcpu *vcpu, u64 id, union kvmppc_one_reg *val)
{
- int r = -EINVAL;
+ int r = 0;
+ long int i;
+ unsigned long addr, len;
- switch (reg->id) {
+ switch (id) {
case KVM_REG_PPC_HIOR:
- {
- u64 hior;
/* Only allow this to be set to zero */
- r = get_user(hior, (u64 __user *)reg->addr);
- if (!r && (hior != 0))
+ if (set_reg_val(id, *val))
r = -EINVAL;
break;
- }
+ case KVM_REG_PPC_DABR:
+ vcpu->arch.dabr = set_reg_val(id, *val);
+ break;
+ case KVM_REG_PPC_DSCR:
+ vcpu->arch.dscr = set_reg_val(id, *val);
+ break;
+ case KVM_REG_PPC_PURR:
+ vcpu->arch.purr = set_reg_val(id, *val);
+ break;
+ case KVM_REG_PPC_SPURR:
+ vcpu->arch.spurr = set_reg_val(id, *val);
+ break;
+ case KVM_REG_PPC_AMR:
+ vcpu->arch.amr = set_reg_val(id, *val);
+ break;
+ case KVM_REG_PPC_UAMOR:
+ vcpu->arch.uamor = set_reg_val(id, *val);
+ break;
+ case KVM_REG_PPC_MMCR0 ... KVM_REG_PPC_MMCRA:
+ i = id - KVM_REG_PPC_MMCR0;
+ vcpu->arch.mmcr[i] = set_reg_val(id, *val);
+ break;
+ case KVM_REG_PPC_PMC1 ... KVM_REG_PPC_PMC8:
+ i = id - KVM_REG_PPC_PMC1;
+ vcpu->arch.pmc[i] = set_reg_val(id, *val);
+ break;
+#ifdef CONFIG_VSX
+ case KVM_REG_PPC_FPR0 ... KVM_REG_PPC_FPR31:
+ if (cpu_has_feature(CPU_FTR_VSX)) {
+ /* VSX => FP reg i is stored in arch.vsr[2*i] */
+ long int i = id - KVM_REG_PPC_FPR0;
+ vcpu->arch.vsr[2 * i] = set_reg_val(id, *val);
+ } else {
+ /* let generic code handle it */
+ r = -EINVAL;
+ }
+ break;
+ case KVM_REG_PPC_VSR0 ... KVM_REG_PPC_VSR31:
+ if (cpu_has_feature(CPU_FTR_VSX)) {
+ long int i = id - KVM_REG_PPC_VSR0;
+ vcpu->arch.vsr[2 * i] = val->vsxval[0];
+ vcpu->arch.vsr[2 * i + 1] = val->vsxval[1];
+ } else {
+ r = -ENXIO;
+ }
+ break;
+#endif /* CONFIG_VSX */
+ case KVM_REG_PPC_VPA_ADDR:
+ addr = set_reg_val(id, *val);
+ r = -EINVAL;
+ if (!addr && (vcpu->arch.slb_shadow.next_gpa ||
+ vcpu->arch.dtl.next_gpa))
+ break;
+ r = set_vpa(vcpu, &vcpu->arch.vpa, addr, sizeof(struct lppaca));
+ break;
+ case KVM_REG_PPC_VPA_SLB:
+ addr = val->vpaval.addr;
+ len = val->vpaval.length;
+ r = -EINVAL;
+ if (addr && !vcpu->arch.vpa.next_gpa)
+ break;
+ r = set_vpa(vcpu, &vcpu->arch.slb_shadow, addr, len);
+ break;
+ case KVM_REG_PPC_VPA_DTL:
+ addr = val->vpaval.addr;
+ len = val->vpaval.length;
+ r = -EINVAL;
+ if (len < sizeof(struct dtl_entry))
+ break;
+ if (addr && !vcpu->arch.vpa.next_gpa)
+ break;
+ len -= len % sizeof(struct dtl_entry);
+ r = set_vpa(vcpu, &vcpu->arch.dtl, addr, len);
+ break;
default:
+ r = -EINVAL;
break;
}
static void kvmppc_remove_runnable(struct kvmppc_vcore *vc,
struct kvm_vcpu *vcpu)
{
- struct kvm_vcpu *v;
-
if (vcpu->arch.state != KVMPPC_VCPU_RUNNABLE)
return;
vcpu->arch.state = KVMPPC_VCPU_BUSY_IN_HOST;
--vc->n_runnable;
++vc->n_busy;
- /* decrement the physical thread id of each following vcpu */
- v = vcpu;
- list_for_each_entry_continue(v, &vc->runnable_threads, arch.run_list)
- --v->arch.ptid;
list_del(&vcpu->arch.run_list);
}
long ret;
u64 now;
int ptid, i, need_vpa_update;
+ int srcu_idx;
/* don't start if any threads have a signal pending */
need_vpa_update = 0;
spin_unlock(&vc->lock);
kvm_guest_enter();
+
+ srcu_idx = srcu_read_lock(&vcpu0->kvm->srcu);
+
__kvmppc_vcore_entry(NULL, vcpu0);
for (i = 0; i < threads_per_core; ++i)
kvmppc_release_hwthread(vc->pcpu + i);
vc->vcore_state = VCORE_EXITING;
spin_unlock(&vc->lock);
+ srcu_read_unlock(&vcpu0->kvm->srcu, srcu_idx);
+
/* make sure updates to secondary vcpu structs are visible now */
smp_mb();
kvm_guest_exit();
n = kvm_dirty_bitmap_bytes(memslot);
memset(memslot->dirty_bitmap, 0, n);
- r = kvmppc_hv_get_dirty_log(kvm, memslot);
+ r = kvmppc_hv_get_dirty_log(kvm, memslot, memslot->dirty_bitmap);
if (r)
goto out;
return senc;
}
-int kvmppc_core_prepare_memory_region(struct kvm *kvm,
- struct kvm_userspace_memory_region *mem)
+static void unpin_slot(struct kvm_memory_slot *memslot)
{
- unsigned long npages;
- unsigned long *phys;
+ unsigned long *physp;
+ unsigned long j, npages, pfn;
+ struct page *page;
- /* Allocate a slot_phys array */
- phys = kvm->arch.slot_phys[mem->slot];
- if (!kvm->arch.using_mmu_notifiers && !phys) {
- npages = mem->memory_size >> PAGE_SHIFT;
- phys = vzalloc(npages * sizeof(unsigned long));
- if (!phys)
- return -ENOMEM;
- kvm->arch.slot_phys[mem->slot] = phys;
- kvm->arch.slot_npages[mem->slot] = npages;
+ physp = memslot->arch.slot_phys;
+ npages = memslot->npages;
+ if (!physp)
+ return;
+ for (j = 0; j < npages; j++) {
+ if (!(physp[j] & KVMPPC_GOT_PAGE))
+ continue;
+ pfn = physp[j] >> PAGE_SHIFT;
+ page = pfn_to_page(pfn);
+ SetPageDirty(page);
+ put_page(page);
}
+}
+
+void kvmppc_core_free_memslot(struct kvm_memory_slot *free,
+ struct kvm_memory_slot *dont)
+{
+ if (!dont || free->arch.rmap != dont->arch.rmap) {
+ vfree(free->arch.rmap);
+ free->arch.rmap = NULL;
+ }
+ if (!dont || free->arch.slot_phys != dont->arch.slot_phys) {
+ unpin_slot(free);
+ vfree(free->arch.slot_phys);
+ free->arch.slot_phys = NULL;
+ }
+}
+
+int kvmppc_core_create_memslot(struct kvm_memory_slot *slot,
+ unsigned long npages)
+{
+ slot->arch.rmap = vzalloc(npages * sizeof(*slot->arch.rmap));
+ if (!slot->arch.rmap)
+ return -ENOMEM;
+ slot->arch.slot_phys = NULL;
return 0;
}
-static void unpin_slot(struct kvm *kvm, int slot_id)
+int kvmppc_core_prepare_memory_region(struct kvm *kvm,
+ struct kvm_memory_slot *memslot,
+ struct kvm_userspace_memory_region *mem)
{
- unsigned long *physp;
- unsigned long j, npages, pfn;
- struct page *page;
+ unsigned long *phys;
- physp = kvm->arch.slot_phys[slot_id];
- npages = kvm->arch.slot_npages[slot_id];
- if (physp) {
- spin_lock(&kvm->arch.slot_phys_lock);
- for (j = 0; j < npages; j++) {
- if (!(physp[j] & KVMPPC_GOT_PAGE))
- continue;
- pfn = physp[j] >> PAGE_SHIFT;
- page = pfn_to_page(pfn);
- SetPageDirty(page);
- put_page(page);
- }
- kvm->arch.slot_phys[slot_id] = NULL;
- spin_unlock(&kvm->arch.slot_phys_lock);
- vfree(physp);
+ /* Allocate a slot_phys array if needed */
+ phys = memslot->arch.slot_phys;
+ if (!kvm->arch.using_mmu_notifiers && !phys && memslot->npages) {
+ phys = vzalloc(memslot->npages * sizeof(unsigned long));
+ if (!phys)
+ return -ENOMEM;
+ memslot->arch.slot_phys = phys;
}
+
+ return 0;
}
void kvmppc_core_commit_memory_region(struct kvm *kvm,
- struct kvm_userspace_memory_region *mem)
+ struct kvm_userspace_memory_region *mem,
+ struct kvm_memory_slot old)
{
+ unsigned long npages = mem->memory_size >> PAGE_SHIFT;
+ struct kvm_memory_slot *memslot;
+
+ if (npages && old.npages) {
+ /*
+ * If modifying a memslot, reset all the rmap dirty bits.
+ * If this is a new memslot, we don't need to do anything
+ * since the rmap array starts out as all zeroes,
+ * i.e. no pages are dirty.
+ */
+ memslot = id_to_memslot(kvm->memslots, mem->slot);
+ kvmppc_hv_get_dirty_log(kvm, memslot, NULL);
+ }
}
static int kvmppc_hv_setup_htab_rma(struct kvm_vcpu *vcpu)
unsigned long rmls;
unsigned long *physp;
unsigned long i, npages;
+ int srcu_idx;
mutex_lock(&kvm->lock);
if (kvm->arch.rma_setup_done)
}
/* Look up the memslot for guest physical address 0 */
+ srcu_idx = srcu_read_lock(&kvm->srcu);
memslot = gfn_to_memslot(kvm, 0);
/* We must have some memory at 0 by now */
err = -EINVAL;
if (!memslot || (memslot->flags & KVM_MEMSLOT_INVALID))
- goto out;
+ goto out_srcu;
/* Look up the VMA for the start of this memory slot */
hva = memslot->userspace_addr;
err = -EPERM;
if (cpu_has_feature(CPU_FTR_ARCH_201)) {
pr_err("KVM: CPU requires an RMO\n");
- goto out;
+ goto out_srcu;
}
/* We can handle 4k, 64k or 16M pages in the VRMA */
err = -EINVAL;
if (!(psize == 0x1000 || psize == 0x10000 ||
psize == 0x1000000))
- goto out;
+ goto out_srcu;
/* Update VRMASD field in the LPCR */
senc = slb_pgsize_encoding(psize);
err = -EINVAL;
if (rmls < 0) {
pr_err("KVM: Can't use RMA of 0x%lx bytes\n", rma_size);
- goto out;
+ goto out_srcu;
}
atomic_inc(&ri->use_count);
kvm->arch.rma = ri;
/* Initialize phys addrs of pages in RMO */
npages = ri->npages;
porder = __ilog2(npages);
- physp = kvm->arch.slot_phys[memslot->id];
- spin_lock(&kvm->arch.slot_phys_lock);
- for (i = 0; i < npages; ++i)
- physp[i] = ((ri->base_pfn + i) << PAGE_SHIFT) + porder;
- spin_unlock(&kvm->arch.slot_phys_lock);
+ physp = memslot->arch.slot_phys;
+ if (physp) {
+ if (npages > memslot->npages)
+ npages = memslot->npages;
+ spin_lock(&kvm->arch.slot_phys_lock);
+ for (i = 0; i < npages; ++i)
+ physp[i] = ((ri->base_pfn + i) << PAGE_SHIFT) +
+ porder;
+ spin_unlock(&kvm->arch.slot_phys_lock);
+ }
}
/* Order updates to kvm->arch.lpcr etc. vs. rma_setup_done */
smp_wmb();
kvm->arch.rma_setup_done = 1;
err = 0;
+ out_srcu:
+ srcu_read_unlock(&kvm->srcu, srcu_idx);
out:
mutex_unlock(&kvm->lock);
return err;
void kvmppc_core_destroy_vm(struct kvm *kvm)
{
- unsigned long i;
-
- if (!kvm->arch.using_mmu_notifiers)
- for (i = 0; i < KVM_MEM_SLOTS_NUM; i++)
- unpin_slot(kvm, i);
-
if (kvm->arch.rma) {
kvm_release_rma(kvm->arch.rma);
kvm->arch.rma = NULL;
git.samba.org / sfrench / cifs-2.6.git / blobdiff