mirror of https://gitee.com/openkylin/linux.git
Fixes for PPC and s390.
-----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.22 (GNU/Linux) iQEcBAABAgAGBQJc85ibAAoJEL/70l94x66D72gH/iaXjRF9uqGSnd1/JLHIawfb oH0VQS24tBzRlFREBTA68IxThgjTmSS+yHcAXSO7JmxztjGq3ZWiNaidQIvC1reu t4MJMvf7ZZa7Yq0OAy2jwVAkZMKk5P8hBjjI5N7pEBb4ApJHzsCHV+KEIe5loc+q f5LYLR53keImJ40wxh/qFftNNlYJUMv6tWa8y0mrlBrKABOvdRYFswhqcnEPibi9 cPoHDS6Ep/34eAVQzqHzfDbjezpa342SSw6s66Vpb/qYJyxoUh1Mw+9YCmAWanS8 vuvXz4qjCFvLRrmc9ctASUTEVydqx8IdcKQGiteWgpSrl4kgy6nLMZDY5sbq8UM= =Bgfn -----END PGP SIGNATURE----- Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm Pull KVM fixes from Paolo Bonzini: "Fixes for PPC and s390" * tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: KVM: PPC: Book3S HV: Restore SPRG3 in kvmhv_p9_guest_entry() KVM: PPC: Book3S HV: Fix lockdep warning when entering guest on POWER9 KVM: PPC: Book3S HV: XIVE: Fix page offset when clearing ESB pages KVM: PPC: Book3S HV: XIVE: Take the srcu read lock when accessing memslots KVM: PPC: Book3S HV: XIVE: Do not clear IRQ data of passthrough interrupts KVM: PPC: Book3S HV: XIVE: Introduce a new mutex for the XIVE device KVM: PPC: Book3S HV: XIVE: Fix the enforced limit on the vCPU identifier KVM: PPC: Book3S HV: XIVE: Do not test the EQ flag validity when resetting KVM: PPC: Book3S HV: XIVE: Clear file mapping when device is released KVM: PPC: Book3S HV: Don't take kvm->lock around kvm_for_each_vcpu KVM: PPC: Book3S: Use new mutex to synchronize access to rtas token list KVM: PPC: Book3S HV: Use new mutex to synchronize MMU setup KVM: PPC: Book3S HV: Avoid touching arch.mmu_ready in XIVE release functions KVM: s390: Do not report unusabled IDs via KVM_CAP_MAX_VCPU_ID kvm: fix compile on s390 part 2
This commit is contained in:
Linus Torvalds
commit
b44a1dd3f6
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@ -1122,6 +1122,9 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
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case KVM_CAP_MAX_VCPUS:
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r = KVM_MAX_VCPUS;
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break;
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case KVM_CAP_MAX_VCPU_ID:
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r = KVM_MAX_VCPU_ID;
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break;
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case KVM_CAP_MIPS_FPU:
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/* We don't handle systems with inconsistent cpu_has_fpu */
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r = !!raw_cpu_has_fpu;
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@ -309,6 +309,7 @@ struct kvm_arch {
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#ifdef CONFIG_PPC_BOOK3S_64
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struct list_head spapr_tce_tables;
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struct list_head rtas_tokens;
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struct mutex rtas_token_lock;
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DECLARE_BITMAP(enabled_hcalls, MAX_HCALL_OPCODE/4 + 1);
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#endif
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#ifdef CONFIG_KVM_MPIC
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@ -325,6 +326,7 @@ struct kvm_arch {
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#endif
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struct kvmppc_ops *kvm_ops;
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#ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
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struct mutex mmu_setup_lock; /* nests inside vcpu mutexes */
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u64 l1_ptcr;
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int max_nested_lpid;
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struct kvm_nested_guest *nested_guests[KVM_MAX_NESTED_GUESTS];
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@ -902,6 +902,7 @@ int kvmppc_core_init_vm(struct kvm *kvm)
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#ifdef CONFIG_PPC64
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INIT_LIST_HEAD_RCU(&kvm->arch.spapr_tce_tables);
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INIT_LIST_HEAD(&kvm->arch.rtas_tokens);
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mutex_init(&kvm->arch.rtas_token_lock);
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#endif
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return kvm->arch.kvm_ops->init_vm(kvm);
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@ -63,7 +63,7 @@ struct kvm_resize_hpt {
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struct work_struct work;
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u32 order;
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/* These fields protected by kvm->lock */
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/* These fields protected by kvm->arch.mmu_setup_lock */
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/* Possible values and their usage:
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* <0 an error occurred during allocation,
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@ -73,7 +73,7 @@ struct kvm_resize_hpt {
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int error;
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/* Private to the work thread, until error != -EBUSY,
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* then protected by kvm->lock.
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* then protected by kvm->arch.mmu_setup_lock.
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*/
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struct kvm_hpt_info hpt;
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};
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@ -139,7 +139,7 @@ long kvmppc_alloc_reset_hpt(struct kvm *kvm, int order)
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long err = -EBUSY;
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struct kvm_hpt_info info;
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mutex_lock(&kvm->lock);
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mutex_lock(&kvm->arch.mmu_setup_lock);
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if (kvm->arch.mmu_ready) {
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kvm->arch.mmu_ready = 0;
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/* order mmu_ready vs. vcpus_running */
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@ -183,7 +183,7 @@ long kvmppc_alloc_reset_hpt(struct kvm *kvm, int order)
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/* Ensure that each vcpu will flush its TLB on next entry. */
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cpumask_setall(&kvm->arch.need_tlb_flush);
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mutex_unlock(&kvm->lock);
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mutex_unlock(&kvm->arch.mmu_setup_lock);
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return err;
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}
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@ -1447,7 +1447,7 @@ static void resize_hpt_pivot(struct kvm_resize_hpt *resize)
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static void resize_hpt_release(struct kvm *kvm, struct kvm_resize_hpt *resize)
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{
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if (WARN_ON(!mutex_is_locked(&kvm->lock)))
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if (WARN_ON(!mutex_is_locked(&kvm->arch.mmu_setup_lock)))
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return;
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if (!resize)
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@ -1474,14 +1474,14 @@ static void resize_hpt_prepare_work(struct work_struct *work)
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if (WARN_ON(resize->error != -EBUSY))
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return;
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mutex_lock(&kvm->lock);
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mutex_lock(&kvm->arch.mmu_setup_lock);
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/* Request is still current? */
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if (kvm->arch.resize_hpt == resize) {
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/* We may request large allocations here:
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* do not sleep with kvm->lock held for a while.
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* do not sleep with kvm->arch.mmu_setup_lock held for a while.
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*/
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mutex_unlock(&kvm->lock);
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mutex_unlock(&kvm->arch.mmu_setup_lock);
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resize_hpt_debug(resize, "resize_hpt_prepare_work(): order = %d\n",
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resize->order);
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@ -1494,9 +1494,9 @@ static void resize_hpt_prepare_work(struct work_struct *work)
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if (WARN_ON(err == -EBUSY))
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err = -EINPROGRESS;
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mutex_lock(&kvm->lock);
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mutex_lock(&kvm->arch.mmu_setup_lock);
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/* It is possible that kvm->arch.resize_hpt != resize
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* after we grab kvm->lock again.
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* after we grab kvm->arch.mmu_setup_lock again.
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*/
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}
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@ -1505,7 +1505,7 @@ static void resize_hpt_prepare_work(struct work_struct *work)
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if (kvm->arch.resize_hpt != resize)
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resize_hpt_release(kvm, resize);
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mutex_unlock(&kvm->lock);
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mutex_unlock(&kvm->arch.mmu_setup_lock);
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}
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long kvm_vm_ioctl_resize_hpt_prepare(struct kvm *kvm,
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@ -1522,7 +1522,7 @@ long kvm_vm_ioctl_resize_hpt_prepare(struct kvm *kvm,
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if (shift && ((shift < 18) || (shift > 46)))
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return -EINVAL;
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mutex_lock(&kvm->lock);
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mutex_lock(&kvm->arch.mmu_setup_lock);
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resize = kvm->arch.resize_hpt;
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@ -1565,7 +1565,7 @@ long kvm_vm_ioctl_resize_hpt_prepare(struct kvm *kvm,
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ret = 100; /* estimated time in ms */
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out:
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mutex_unlock(&kvm->lock);
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mutex_unlock(&kvm->arch.mmu_setup_lock);
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return ret;
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}
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@ -1588,7 +1588,7 @@ long kvm_vm_ioctl_resize_hpt_commit(struct kvm *kvm,
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if (shift && ((shift < 18) || (shift > 46)))
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return -EINVAL;
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mutex_lock(&kvm->lock);
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mutex_lock(&kvm->arch.mmu_setup_lock);
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resize = kvm->arch.resize_hpt;
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@ -1625,7 +1625,7 @@ long kvm_vm_ioctl_resize_hpt_commit(struct kvm *kvm,
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smp_mb();
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out_no_hpt:
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resize_hpt_release(kvm, resize);
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mutex_unlock(&kvm->lock);
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mutex_unlock(&kvm->arch.mmu_setup_lock);
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return ret;
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}
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@ -1868,7 +1868,7 @@ static ssize_t kvm_htab_write(struct file *file, const char __user *buf,
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return -EINVAL;
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/* lock out vcpus from running while we're doing this */
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mutex_lock(&kvm->lock);
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mutex_lock(&kvm->arch.mmu_setup_lock);
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mmu_ready = kvm->arch.mmu_ready;
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if (mmu_ready) {
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kvm->arch.mmu_ready = 0; /* temporarily */
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@ -1876,7 +1876,7 @@ static ssize_t kvm_htab_write(struct file *file, const char __user *buf,
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smp_mb();
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if (atomic_read(&kvm->arch.vcpus_running)) {
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kvm->arch.mmu_ready = 1;
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mutex_unlock(&kvm->lock);
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mutex_unlock(&kvm->arch.mmu_setup_lock);
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return -EBUSY;
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}
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}
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@ -1963,7 +1963,7 @@ static ssize_t kvm_htab_write(struct file *file, const char __user *buf,
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/* Order HPTE updates vs. mmu_ready */
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smp_wmb();
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kvm->arch.mmu_ready = mmu_ready;
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mutex_unlock(&kvm->lock);
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mutex_unlock(&kvm->arch.mmu_setup_lock);
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if (err)
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return err;
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@ -446,12 +446,7 @@ static void kvmppc_dump_regs(struct kvm_vcpu *vcpu)
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static struct kvm_vcpu *kvmppc_find_vcpu(struct kvm *kvm, int id)
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{
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struct kvm_vcpu *ret;
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mutex_lock(&kvm->lock);
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ret = kvm_get_vcpu_by_id(kvm, id);
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mutex_unlock(&kvm->lock);
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return ret;
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return kvm_get_vcpu_by_id(kvm, id);
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}
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static void init_vpa(struct kvm_vcpu *vcpu, struct lppaca *vpa)
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@ -1583,7 +1578,6 @@ static void kvmppc_set_lpcr(struct kvm_vcpu *vcpu, u64 new_lpcr,
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struct kvmppc_vcore *vc = vcpu->arch.vcore;
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u64 mask;
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mutex_lock(&kvm->lock);
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spin_lock(&vc->lock);
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/*
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* If ILE (interrupt little-endian) has changed, update the
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@ -1623,7 +1617,6 @@ static void kvmppc_set_lpcr(struct kvm_vcpu *vcpu, u64 new_lpcr,
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mask &= 0xFFFFFFFF;
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vc->lpcr = (vc->lpcr & ~mask) | (new_lpcr & mask);
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spin_unlock(&vc->lock);
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mutex_unlock(&kvm->lock);
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}
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static int kvmppc_get_one_reg_hv(struct kvm_vcpu *vcpu, u64 id,
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@ -2338,11 +2331,17 @@ static struct kvm_vcpu *kvmppc_core_vcpu_create_hv(struct kvm *kvm,
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pr_devel("KVM: collision on id %u", id);
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vcore = NULL;
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} else if (!vcore) {
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/*
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* Take mmu_setup_lock for mutual exclusion
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* with kvmppc_update_lpcr().
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*/
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err = -ENOMEM;
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vcore = kvmppc_vcore_create(kvm,
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id & ~(kvm->arch.smt_mode - 1));
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mutex_lock(&kvm->arch.mmu_setup_lock);
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kvm->arch.vcores[core] = vcore;
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kvm->arch.online_vcores++;
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mutex_unlock(&kvm->arch.mmu_setup_lock);
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}
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}
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mutex_unlock(&kvm->lock);
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@ -3663,6 +3662,7 @@ int kvmhv_p9_guest_entry(struct kvm_vcpu *vcpu, u64 time_limit,
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vc->in_guest = 0;
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mtspr(SPRN_DEC, local_paca->kvm_hstate.dec_expires - mftb());
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mtspr(SPRN_SPRG_VDSO_WRITE, local_paca->sprg_vdso);
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kvmhv_load_host_pmu();
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@ -3859,7 +3859,7 @@ static int kvmhv_setup_mmu(struct kvm_vcpu *vcpu)
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int r = 0;
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struct kvm *kvm = vcpu->kvm;
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mutex_lock(&kvm->lock);
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mutex_lock(&kvm->arch.mmu_setup_lock);
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if (!kvm->arch.mmu_ready) {
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if (!kvm_is_radix(kvm))
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r = kvmppc_hv_setup_htab_rma(vcpu);
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@ -3869,7 +3869,7 @@ static int kvmhv_setup_mmu(struct kvm_vcpu *vcpu)
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kvm->arch.mmu_ready = 1;
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}
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}
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mutex_unlock(&kvm->lock);
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mutex_unlock(&kvm->arch.mmu_setup_lock);
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return r;
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}
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@ -4091,16 +4091,20 @@ int kvmhv_run_single_vcpu(struct kvm_run *kvm_run,
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kvmppc_check_need_tlb_flush(kvm, pcpu, nested);
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}
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trace_hardirqs_on();
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guest_enter_irqoff();
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srcu_idx = srcu_read_lock(&kvm->srcu);
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this_cpu_disable_ftrace();
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/* Tell lockdep that we're about to enable interrupts */
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trace_hardirqs_on();
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trap = kvmhv_p9_guest_entry(vcpu, time_limit, lpcr);
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vcpu->arch.trap = trap;
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trace_hardirqs_off();
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this_cpu_enable_ftrace();
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srcu_read_unlock(&kvm->srcu, srcu_idx);
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@ -4110,7 +4114,6 @@ int kvmhv_run_single_vcpu(struct kvm_run *kvm_run,
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isync();
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}
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trace_hardirqs_off();
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set_irq_happened(trap);
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kvmppc_set_host_core(pcpu);
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@ -4478,7 +4481,8 @@ static void kvmppc_core_commit_memory_region_hv(struct kvm *kvm,
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/*
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* Update LPCR values in kvm->arch and in vcores.
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* Caller must hold kvm->lock.
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* Caller must hold kvm->arch.mmu_setup_lock (for mutual exclusion
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* of kvm->arch.lpcr update).
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*/
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void kvmppc_update_lpcr(struct kvm *kvm, unsigned long lpcr, unsigned long mask)
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{
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@ -4530,7 +4534,7 @@ void kvmppc_setup_partition_table(struct kvm *kvm)
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|
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/*
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* Set up HPT (hashed page table) and RMA (real-mode area).
|
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* Must be called with kvm->lock held.
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* Must be called with kvm->arch.mmu_setup_lock held.
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*/
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static int kvmppc_hv_setup_htab_rma(struct kvm_vcpu *vcpu)
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{
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@ -4618,7 +4622,10 @@ static int kvmppc_hv_setup_htab_rma(struct kvm_vcpu *vcpu)
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goto out_srcu;
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}
|
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|
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/* Must be called with kvm->lock held and mmu_ready = 0 and no vcpus running */
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/*
|
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* Must be called with kvm->arch.mmu_setup_lock held and
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* mmu_ready = 0 and no vcpus running.
|
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*/
|
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int kvmppc_switch_mmu_to_hpt(struct kvm *kvm)
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{
|
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if (nesting_enabled(kvm))
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|
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@ -4635,7 +4642,10 @@ int kvmppc_switch_mmu_to_hpt(struct kvm *kvm)
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return 0;
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}
|
||||
|
||||
/* Must be called with kvm->lock held and mmu_ready = 0 and no vcpus running */
|
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/*
|
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* Must be called with kvm->arch.mmu_setup_lock held and
|
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* mmu_ready = 0 and no vcpus running.
|
||||
*/
|
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int kvmppc_switch_mmu_to_radix(struct kvm *kvm)
|
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{
|
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int err;
|
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|
|
@ -4740,6 +4750,8 @@ static int kvmppc_core_init_vm_hv(struct kvm *kvm)
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|||
char buf[32];
|
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int ret;
|
||||
|
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mutex_init(&kvm->arch.mmu_setup_lock);
|
||||
|
||||
/* Allocate the guest's logical partition ID */
|
||||
|
||||
lpid = kvmppc_alloc_lpid();
|
||||
|
|
@ -5265,7 +5277,7 @@ static int kvmhv_configure_mmu(struct kvm *kvm, struct kvm_ppc_mmuv3_cfg *cfg)
|
|||
if (kvmhv_on_pseries() && !radix)
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return -EINVAL;
|
||||
|
||||
mutex_lock(&kvm->lock);
|
||||
mutex_lock(&kvm->arch.mmu_setup_lock);
|
||||
if (radix != kvm_is_radix(kvm)) {
|
||||
if (kvm->arch.mmu_ready) {
|
||||
kvm->arch.mmu_ready = 0;
|
||||
|
|
@ -5293,7 +5305,7 @@ static int kvmhv_configure_mmu(struct kvm *kvm, struct kvm_ppc_mmuv3_cfg *cfg)
|
|||
err = 0;
|
||||
|
||||
out_unlock:
|
||||
mutex_unlock(&kvm->lock);
|
||||
mutex_unlock(&kvm->arch.mmu_setup_lock);
|
||||
return err;
|
||||
}
|
||||
|
||||
|
|
|
|||
|
|
@ -146,7 +146,7 @@ static int rtas_token_undefine(struct kvm *kvm, char *name)
|
|||
{
|
||||
struct rtas_token_definition *d, *tmp;
|
||||
|
||||
lockdep_assert_held(&kvm->lock);
|
||||
lockdep_assert_held(&kvm->arch.rtas_token_lock);
|
||||
|
||||
list_for_each_entry_safe(d, tmp, &kvm->arch.rtas_tokens, list) {
|
||||
if (rtas_name_matches(d->handler->name, name)) {
|
||||
|
|
@ -167,7 +167,7 @@ static int rtas_token_define(struct kvm *kvm, char *name, u64 token)
|
|||
bool found;
|
||||
int i;
|
||||
|
||||
lockdep_assert_held(&kvm->lock);
|
||||
lockdep_assert_held(&kvm->arch.rtas_token_lock);
|
||||
|
||||
list_for_each_entry(d, &kvm->arch.rtas_tokens, list) {
|
||||
if (d->token == token)
|
||||
|
|
@ -206,14 +206,14 @@ int kvm_vm_ioctl_rtas_define_token(struct kvm *kvm, void __user *argp)
|
|||
if (copy_from_user(&args, argp, sizeof(args)))
|
||||
return -EFAULT;
|
||||
|
||||
mutex_lock(&kvm->lock);
|
||||
mutex_lock(&kvm->arch.rtas_token_lock);
|
||||
|
||||
if (args.token)
|
||||
rc = rtas_token_define(kvm, args.name, args.token);
|
||||
else
|
||||
rc = rtas_token_undefine(kvm, args.name);
|
||||
|
||||
mutex_unlock(&kvm->lock);
|
||||
mutex_unlock(&kvm->arch.rtas_token_lock);
|
||||
|
||||
return rc;
|
||||
}
|
||||
|
|
@ -245,7 +245,7 @@ int kvmppc_rtas_hcall(struct kvm_vcpu *vcpu)
|
|||
orig_rets = args.rets;
|
||||
args.rets = &args.args[be32_to_cpu(args.nargs)];
|
||||
|
||||
mutex_lock(&vcpu->kvm->lock);
|
||||
mutex_lock(&vcpu->kvm->arch.rtas_token_lock);
|
||||
|
||||
rc = -ENOENT;
|
||||
list_for_each_entry(d, &vcpu->kvm->arch.rtas_tokens, list) {
|
||||
|
|
@ -256,7 +256,7 @@ int kvmppc_rtas_hcall(struct kvm_vcpu *vcpu)
|
|||
}
|
||||
}
|
||||
|
||||
mutex_unlock(&vcpu->kvm->lock);
|
||||
mutex_unlock(&vcpu->kvm->arch.rtas_token_lock);
|
||||
|
||||
if (rc == 0) {
|
||||
args.rets = orig_rets;
|
||||
|
|
@ -282,8 +282,6 @@ void kvmppc_rtas_tokens_free(struct kvm *kvm)
|
|||
{
|
||||
struct rtas_token_definition *d, *tmp;
|
||||
|
||||
lockdep_assert_held(&kvm->lock);
|
||||
|
||||
list_for_each_entry_safe(d, tmp, &kvm->arch.rtas_tokens, list) {
|
||||
list_del(&d->list);
|
||||
kfree(d);
|
||||
|
|
|
|||
|
|
@ -271,14 +271,14 @@ static int xive_provision_queue(struct kvm_vcpu *vcpu, u8 prio)
|
|||
return rc;
|
||||
}
|
||||
|
||||
/* Called with kvm_lock held */
|
||||
/* Called with xive->lock held */
|
||||
static int xive_check_provisioning(struct kvm *kvm, u8 prio)
|
||||
{
|
||||
struct kvmppc_xive *xive = kvm->arch.xive;
|
||||
struct kvm_vcpu *vcpu;
|
||||
int i, rc;
|
||||
|
||||
lockdep_assert_held(&kvm->lock);
|
||||
lockdep_assert_held(&xive->lock);
|
||||
|
||||
/* Already provisioned ? */
|
||||
if (xive->qmap & (1 << prio))
|
||||
|
|
@ -621,9 +621,12 @@ int kvmppc_xive_set_xive(struct kvm *kvm, u32 irq, u32 server,
|
|||
irq, server, priority);
|
||||
|
||||
/* First, check provisioning of queues */
|
||||
if (priority != MASKED)
|
||||
if (priority != MASKED) {
|
||||
mutex_lock(&xive->lock);
|
||||
rc = xive_check_provisioning(xive->kvm,
|
||||
xive_prio_from_guest(priority));
|
||||
mutex_unlock(&xive->lock);
|
||||
}
|
||||
if (rc) {
|
||||
pr_devel(" provisioning failure %d !\n", rc);
|
||||
return rc;
|
||||
|
|
@ -1199,7 +1202,7 @@ int kvmppc_xive_connect_vcpu(struct kvm_device *dev,
|
|||
return -ENOMEM;
|
||||
|
||||
/* We need to synchronize with queue provisioning */
|
||||
mutex_lock(&vcpu->kvm->lock);
|
||||
mutex_lock(&xive->lock);
|
||||
vcpu->arch.xive_vcpu = xc;
|
||||
xc->xive = xive;
|
||||
xc->vcpu = vcpu;
|
||||
|
|
@ -1283,7 +1286,7 @@ int kvmppc_xive_connect_vcpu(struct kvm_device *dev,
|
|||
xive_vm_esb_load(&xc->vp_ipi_data, XIVE_ESB_SET_PQ_00);
|
||||
|
||||
bail:
|
||||
mutex_unlock(&vcpu->kvm->lock);
|
||||
mutex_unlock(&xive->lock);
|
||||
if (r) {
|
||||
kvmppc_xive_cleanup_vcpu(vcpu);
|
||||
return r;
|
||||
|
|
@ -1527,13 +1530,12 @@ static int xive_get_source(struct kvmppc_xive *xive, long irq, u64 addr)
|
|||
struct kvmppc_xive_src_block *kvmppc_xive_create_src_block(
|
||||
struct kvmppc_xive *xive, int irq)
|
||||
{
|
||||
struct kvm *kvm = xive->kvm;
|
||||
struct kvmppc_xive_src_block *sb;
|
||||
int i, bid;
|
||||
|
||||
bid = irq >> KVMPPC_XICS_ICS_SHIFT;
|
||||
|
||||
mutex_lock(&kvm->lock);
|
||||
mutex_lock(&xive->lock);
|
||||
|
||||
/* block already exists - somebody else got here first */
|
||||
if (xive->src_blocks[bid])
|
||||
|
|
@ -1560,7 +1562,7 @@ struct kvmppc_xive_src_block *kvmppc_xive_create_src_block(
|
|||
xive->max_sbid = bid;
|
||||
|
||||
out:
|
||||
mutex_unlock(&kvm->lock);
|
||||
mutex_unlock(&xive->lock);
|
||||
return xive->src_blocks[bid];
|
||||
}
|
||||
|
||||
|
|
@ -1670,9 +1672,9 @@ static int xive_set_source(struct kvmppc_xive *xive, long irq, u64 addr)
|
|||
/* If we have a priority target the interrupt */
|
||||
if (act_prio != MASKED) {
|
||||
/* First, check provisioning of queues */
|
||||
mutex_lock(&xive->kvm->lock);
|
||||
mutex_lock(&xive->lock);
|
||||
rc = xive_check_provisioning(xive->kvm, act_prio);
|
||||
mutex_unlock(&xive->kvm->lock);
|
||||
mutex_unlock(&xive->lock);
|
||||
|
||||
/* Target interrupt */
|
||||
if (rc == 0)
|
||||
|
|
@ -1826,7 +1828,6 @@ static void kvmppc_xive_cleanup_irq(u32 hw_num, struct xive_irq_data *xd)
|
|||
{
|
||||
xive_vm_esb_load(xd, XIVE_ESB_SET_PQ_01);
|
||||
xive_native_configure_irq(hw_num, 0, MASKED, 0);
|
||||
xive_cleanup_irq_data(xd);
|
||||
}
|
||||
|
||||
void kvmppc_xive_free_sources(struct kvmppc_xive_src_block *sb)
|
||||
|
|
@ -1840,9 +1841,10 @@ void kvmppc_xive_free_sources(struct kvmppc_xive_src_block *sb)
|
|||
continue;
|
||||
|
||||
kvmppc_xive_cleanup_irq(state->ipi_number, &state->ipi_data);
|
||||
xive_cleanup_irq_data(&state->ipi_data);
|
||||
xive_native_free_irq(state->ipi_number);
|
||||
|
||||
/* Pass-through, cleanup too */
|
||||
/* Pass-through, cleanup too but keep IRQ hw data */
|
||||
if (state->pt_number)
|
||||
kvmppc_xive_cleanup_irq(state->pt_number, state->pt_data);
|
||||
|
||||
|
|
@ -1859,21 +1861,10 @@ static void kvmppc_xive_release(struct kvm_device *dev)
|
|||
struct kvm *kvm = xive->kvm;
|
||||
struct kvm_vcpu *vcpu;
|
||||
int i;
|
||||
int was_ready;
|
||||
|
||||
pr_devel("Releasing xive device\n");
|
||||
|
||||
debugfs_remove(xive->dentry);
|
||||
|
||||
/*
|
||||
* Clearing mmu_ready temporarily while holding kvm->lock
|
||||
* is a way of ensuring that no vcpus can enter the guest
|
||||
* until we drop kvm->lock. Doing kick_all_cpus_sync()
|
||||
* ensures that any vcpu executing inside the guest has
|
||||
* exited the guest. Once kick_all_cpus_sync() has finished,
|
||||
* we know that no vcpu can be executing the XIVE push or
|
||||
* pull code, or executing a XICS hcall.
|
||||
*
|
||||
* Since this is the device release function, we know that
|
||||
* userspace does not have any open fd referring to the
|
||||
* device. Therefore there can not be any of the device
|
||||
|
|
@ -1881,9 +1872,8 @@ static void kvmppc_xive_release(struct kvm_device *dev)
|
|||
* and similarly, the connect_vcpu and set/clr_mapped
|
||||
* functions also cannot be being executed.
|
||||
*/
|
||||
was_ready = kvm->arch.mmu_ready;
|
||||
kvm->arch.mmu_ready = 0;
|
||||
kick_all_cpus_sync();
|
||||
|
||||
debugfs_remove(xive->dentry);
|
||||
|
||||
/*
|
||||
* We should clean up the vCPU interrupt presenters first.
|
||||
|
|
@ -1892,12 +1882,22 @@ static void kvmppc_xive_release(struct kvm_device *dev)
|
|||
/*
|
||||
* Take vcpu->mutex to ensure that no one_reg get/set ioctl
|
||||
* (i.e. kvmppc_xive_[gs]et_icp) can be done concurrently.
|
||||
* Holding the vcpu->mutex also means that the vcpu cannot
|
||||
* be executing the KVM_RUN ioctl, and therefore it cannot
|
||||
* be executing the XIVE push or pull code or accessing
|
||||
* the XIVE MMIO regions.
|
||||
*/
|
||||
mutex_lock(&vcpu->mutex);
|
||||
kvmppc_xive_cleanup_vcpu(vcpu);
|
||||
mutex_unlock(&vcpu->mutex);
|
||||
}
|
||||
|
||||
/*
|
||||
* Now that we have cleared vcpu->arch.xive_vcpu, vcpu->arch.irq_type
|
||||
* and vcpu->arch.xive_esc_[vr]addr on each vcpu, we are safe
|
||||
* against xive code getting called during vcpu execution or
|
||||
* set/get one_reg operations.
|
||||
*/
|
||||
kvm->arch.xive = NULL;
|
||||
|
||||
/* Mask and free interrupts */
|
||||
|
|
@ -1911,8 +1911,6 @@ static void kvmppc_xive_release(struct kvm_device *dev)
|
|||
if (xive->vp_base != XIVE_INVALID_VP)
|
||||
xive_native_free_vp_block(xive->vp_base);
|
||||
|
||||
kvm->arch.mmu_ready = was_ready;
|
||||
|
||||
/*
|
||||
* A reference of the kvmppc_xive pointer is now kept under
|
||||
* the xive_devices struct of the machine for reuse. It is
|
||||
|
|
@ -1967,6 +1965,7 @@ static int kvmppc_xive_create(struct kvm_device *dev, u32 type)
|
|||
dev->private = xive;
|
||||
xive->dev = dev;
|
||||
xive->kvm = kvm;
|
||||
mutex_init(&xive->lock);
|
||||
|
||||
/* Already there ? */
|
||||
if (kvm->arch.xive)
|
||||
|
|
|
|||
|
|
@ -141,6 +141,7 @@ struct kvmppc_xive {
|
|||
struct kvmppc_xive_ops *ops;
|
||||
struct address_space *mapping;
|
||||
struct mutex mapping_lock;
|
||||
struct mutex lock;
|
||||
};
|
||||
|
||||
#define KVMPPC_XIVE_Q_COUNT 8
|
||||
|
|
|
|||
|
|
@ -109,12 +109,12 @@ int kvmppc_xive_native_connect_vcpu(struct kvm_device *dev,
|
|||
return -EPERM;
|
||||
if (vcpu->arch.irq_type != KVMPPC_IRQ_DEFAULT)
|
||||
return -EBUSY;
|
||||
if (server_num >= KVM_MAX_VCPUS) {
|
||||
if (server_num >= (KVM_MAX_VCPUS * vcpu->kvm->arch.emul_smt_mode)) {
|
||||
pr_devel("Out of bounds !\n");
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
mutex_lock(&vcpu->kvm->lock);
|
||||
mutex_lock(&xive->lock);
|
||||
|
||||
if (kvmppc_xive_find_server(vcpu->kvm, server_num)) {
|
||||
pr_devel("Duplicate !\n");
|
||||
|
|
@ -159,7 +159,7 @@ int kvmppc_xive_native_connect_vcpu(struct kvm_device *dev,
|
|||
|
||||
/* TODO: reset all queues to a clean state ? */
|
||||
bail:
|
||||
mutex_unlock(&vcpu->kvm->lock);
|
||||
mutex_unlock(&xive->lock);
|
||||
if (rc)
|
||||
kvmppc_xive_native_cleanup_vcpu(vcpu);
|
||||
|
||||
|
|
@ -172,6 +172,7 @@ int kvmppc_xive_native_connect_vcpu(struct kvm_device *dev,
|
|||
static int kvmppc_xive_native_reset_mapped(struct kvm *kvm, unsigned long irq)
|
||||
{
|
||||
struct kvmppc_xive *xive = kvm->arch.xive;
|
||||
pgoff_t esb_pgoff = KVM_XIVE_ESB_PAGE_OFFSET + irq * 2;
|
||||
|
||||
if (irq >= KVMPPC_XIVE_NR_IRQS)
|
||||
return -EINVAL;
|
||||
|
|
@ -185,7 +186,7 @@ static int kvmppc_xive_native_reset_mapped(struct kvm *kvm, unsigned long irq)
|
|||
mutex_lock(&xive->mapping_lock);
|
||||
if (xive->mapping)
|
||||
unmap_mapping_range(xive->mapping,
|
||||
irq * (2ull << PAGE_SHIFT),
|
||||
esb_pgoff << PAGE_SHIFT,
|
||||
2ull << PAGE_SHIFT, 1);
|
||||
mutex_unlock(&xive->mapping_lock);
|
||||
return 0;
|
||||
|
|
@ -535,6 +536,7 @@ static int kvmppc_xive_native_set_queue_config(struct kvmppc_xive *xive,
|
|||
struct xive_q *q;
|
||||
gfn_t gfn;
|
||||
unsigned long page_size;
|
||||
int srcu_idx;
|
||||
|
||||
/*
|
||||
* Demangle priority/server tuple from the EQ identifier
|
||||
|
|
@ -565,24 +567,6 @@ static int kvmppc_xive_native_set_queue_config(struct kvmppc_xive *xive,
|
|||
__func__, server, priority, kvm_eq.flags,
|
||||
kvm_eq.qshift, kvm_eq.qaddr, kvm_eq.qtoggle, kvm_eq.qindex);
|
||||
|
||||
/*
|
||||
* sPAPR specifies a "Unconditional Notify (n) flag" for the
|
||||
* H_INT_SET_QUEUE_CONFIG hcall which forces notification
|
||||
* without using the coalescing mechanisms provided by the
|
||||
* XIVE END ESBs. This is required on KVM as notification
|
||||
* using the END ESBs is not supported.
|
||||
*/
|
||||
if (kvm_eq.flags != KVM_XIVE_EQ_ALWAYS_NOTIFY) {
|
||||
pr_err("invalid flags %d\n", kvm_eq.flags);
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
rc = xive_native_validate_queue_size(kvm_eq.qshift);
|
||||
if (rc) {
|
||||
pr_err("invalid queue size %d\n", kvm_eq.qshift);
|
||||
return rc;
|
||||
}
|
||||
|
||||
/* reset queue and disable queueing */
|
||||
if (!kvm_eq.qshift) {
|
||||
q->guest_qaddr = 0;
|
||||
|
|
@ -604,26 +588,48 @@ static int kvmppc_xive_native_set_queue_config(struct kvmppc_xive *xive,
|
|||
return 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* sPAPR specifies a "Unconditional Notify (n) flag" for the
|
||||
* H_INT_SET_QUEUE_CONFIG hcall which forces notification
|
||||
* without using the coalescing mechanisms provided by the
|
||||
* XIVE END ESBs. This is required on KVM as notification
|
||||
* using the END ESBs is not supported.
|
||||
*/
|
||||
if (kvm_eq.flags != KVM_XIVE_EQ_ALWAYS_NOTIFY) {
|
||||
pr_err("invalid flags %d\n", kvm_eq.flags);
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
rc = xive_native_validate_queue_size(kvm_eq.qshift);
|
||||
if (rc) {
|
||||
pr_err("invalid queue size %d\n", kvm_eq.qshift);
|
||||
return rc;
|
||||
}
|
||||
|
||||
if (kvm_eq.qaddr & ((1ull << kvm_eq.qshift) - 1)) {
|
||||
pr_err("queue page is not aligned %llx/%llx\n", kvm_eq.qaddr,
|
||||
1ull << kvm_eq.qshift);
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
srcu_idx = srcu_read_lock(&kvm->srcu);
|
||||
gfn = gpa_to_gfn(kvm_eq.qaddr);
|
||||
page = gfn_to_page(kvm, gfn);
|
||||
if (is_error_page(page)) {
|
||||
srcu_read_unlock(&kvm->srcu, srcu_idx);
|
||||
pr_err("Couldn't get queue page %llx!\n", kvm_eq.qaddr);
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
page_size = kvm_host_page_size(kvm, gfn);
|
||||
if (1ull << kvm_eq.qshift > page_size) {
|
||||
srcu_read_unlock(&kvm->srcu, srcu_idx);
|
||||
pr_warn("Incompatible host page size %lx!\n", page_size);
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
qaddr = page_to_virt(page) + (kvm_eq.qaddr & ~PAGE_MASK);
|
||||
srcu_read_unlock(&kvm->srcu, srcu_idx);
|
||||
|
||||
/*
|
||||
* Backup the queue page guest address to the mark EQ page
|
||||
|
|
@ -772,7 +778,7 @@ static int kvmppc_xive_reset(struct kvmppc_xive *xive)
|
|||
|
||||
pr_devel("%s\n", __func__);
|
||||
|
||||
mutex_lock(&kvm->lock);
|
||||
mutex_lock(&xive->lock);
|
||||
|
||||
kvm_for_each_vcpu(i, vcpu, kvm) {
|
||||
struct kvmppc_xive_vcpu *xc = vcpu->arch.xive_vcpu;
|
||||
|
|
@ -810,7 +816,7 @@ static int kvmppc_xive_reset(struct kvmppc_xive *xive)
|
|||
}
|
||||
}
|
||||
|
||||
mutex_unlock(&kvm->lock);
|
||||
mutex_unlock(&xive->lock);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
|
@ -854,6 +860,7 @@ static int kvmppc_xive_native_vcpu_eq_sync(struct kvm_vcpu *vcpu)
|
|||
{
|
||||
struct kvmppc_xive_vcpu *xc = vcpu->arch.xive_vcpu;
|
||||
unsigned int prio;
|
||||
int srcu_idx;
|
||||
|
||||
if (!xc)
|
||||
return -ENOENT;
|
||||
|
|
@ -865,7 +872,9 @@ static int kvmppc_xive_native_vcpu_eq_sync(struct kvm_vcpu *vcpu)
|
|||
continue;
|
||||
|
||||
/* Mark EQ page dirty for migration */
|
||||
srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
|
||||
mark_page_dirty(vcpu->kvm, gpa_to_gfn(q->guest_qaddr));
|
||||
srcu_read_unlock(&vcpu->kvm->srcu, srcu_idx);
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
|
@ -878,7 +887,7 @@ static int kvmppc_xive_native_eq_sync(struct kvmppc_xive *xive)
|
|||
|
||||
pr_devel("%s\n", __func__);
|
||||
|
||||
mutex_lock(&kvm->lock);
|
||||
mutex_lock(&xive->lock);
|
||||
for (i = 0; i <= xive->max_sbid; i++) {
|
||||
struct kvmppc_xive_src_block *sb = xive->src_blocks[i];
|
||||
|
||||
|
|
@ -892,7 +901,7 @@ static int kvmppc_xive_native_eq_sync(struct kvmppc_xive *xive)
|
|||
kvm_for_each_vcpu(i, vcpu, kvm) {
|
||||
kvmppc_xive_native_vcpu_eq_sync(vcpu);
|
||||
}
|
||||
mutex_unlock(&kvm->lock);
|
||||
mutex_unlock(&xive->lock);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
|
@ -965,7 +974,7 @@ static int kvmppc_xive_native_has_attr(struct kvm_device *dev,
|
|||
}
|
||||
|
||||
/*
|
||||
* Called when device fd is closed
|
||||
* Called when device fd is closed. kvm->lock is held.
|
||||
*/
|
||||
static void kvmppc_xive_native_release(struct kvm_device *dev)
|
||||
{
|
||||
|
|
@ -973,21 +982,18 @@ static void kvmppc_xive_native_release(struct kvm_device *dev)
|
|||
struct kvm *kvm = xive->kvm;
|
||||
struct kvm_vcpu *vcpu;
|
||||
int i;
|
||||
int was_ready;
|
||||
|
||||
debugfs_remove(xive->dentry);
|
||||
|
||||
pr_devel("Releasing xive native device\n");
|
||||
|
||||
/*
|
||||
* Clearing mmu_ready temporarily while holding kvm->lock
|
||||
* is a way of ensuring that no vcpus can enter the guest
|
||||
* until we drop kvm->lock. Doing kick_all_cpus_sync()
|
||||
* ensures that any vcpu executing inside the guest has
|
||||
* exited the guest. Once kick_all_cpus_sync() has finished,
|
||||
* we know that no vcpu can be executing the XIVE push or
|
||||
* pull code or accessing the XIVE MMIO regions.
|
||||
*
|
||||
* Clear the KVM device file address_space which is used to
|
||||
* unmap the ESB pages when a device is passed-through.
|
||||
*/
|
||||
mutex_lock(&xive->mapping_lock);
|
||||
xive->mapping = NULL;
|
||||
mutex_unlock(&xive->mapping_lock);
|
||||
|
||||
/*
|
||||
* Since this is the device release function, we know that
|
||||
* userspace does not have any open fd or mmap referring to
|
||||
* the device. Therefore there can not be any of the
|
||||
|
|
@ -996,9 +1002,8 @@ static void kvmppc_xive_native_release(struct kvm_device *dev)
|
|||
* connect_vcpu and set/clr_mapped functions also cannot
|
||||
* be being executed.
|
||||
*/
|
||||
was_ready = kvm->arch.mmu_ready;
|
||||
kvm->arch.mmu_ready = 0;
|
||||
kick_all_cpus_sync();
|
||||
|
||||
debugfs_remove(xive->dentry);
|
||||
|
||||
/*
|
||||
* We should clean up the vCPU interrupt presenters first.
|
||||
|
|
@ -1007,12 +1012,22 @@ static void kvmppc_xive_native_release(struct kvm_device *dev)
|
|||
/*
|
||||
* Take vcpu->mutex to ensure that no one_reg get/set ioctl
|
||||
* (i.e. kvmppc_xive_native_[gs]et_vp) can be being done.
|
||||
* Holding the vcpu->mutex also means that the vcpu cannot
|
||||
* be executing the KVM_RUN ioctl, and therefore it cannot
|
||||
* be executing the XIVE push or pull code or accessing
|
||||
* the XIVE MMIO regions.
|
||||
*/
|
||||
mutex_lock(&vcpu->mutex);
|
||||
kvmppc_xive_native_cleanup_vcpu(vcpu);
|
||||
mutex_unlock(&vcpu->mutex);
|
||||
}
|
||||
|
||||
/*
|
||||
* Now that we have cleared vcpu->arch.xive_vcpu, vcpu->arch.irq_type
|
||||
* and vcpu->arch.xive_esc_[vr]addr on each vcpu, we are safe
|
||||
* against xive code getting called during vcpu execution or
|
||||
* set/get one_reg operations.
|
||||
*/
|
||||
kvm->arch.xive = NULL;
|
||||
|
||||
for (i = 0; i <= xive->max_sbid; i++) {
|
||||
|
|
@ -1025,8 +1040,6 @@ static void kvmppc_xive_native_release(struct kvm_device *dev)
|
|||
if (xive->vp_base != XIVE_INVALID_VP)
|
||||
xive_native_free_vp_block(xive->vp_base);
|
||||
|
||||
kvm->arch.mmu_ready = was_ready;
|
||||
|
||||
/*
|
||||
* A reference of the kvmppc_xive pointer is now kept under
|
||||
* the xive_devices struct of the machine for reuse. It is
|
||||
|
|
@ -1060,6 +1073,7 @@ static int kvmppc_xive_native_create(struct kvm_device *dev, u32 type)
|
|||
xive->kvm = kvm;
|
||||
kvm->arch.xive = xive;
|
||||
mutex_init(&xive->mapping_lock);
|
||||
mutex_init(&xive->lock);
|
||||
|
||||
/*
|
||||
* Allocate a bunch of VPs. KVM_MAX_VCPUS is a large value for
|
||||
|
|
|
|||
|
|
@ -657,6 +657,9 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
|
|||
case KVM_CAP_MAX_VCPUS:
|
||||
r = KVM_MAX_VCPUS;
|
||||
break;
|
||||
case KVM_CAP_MAX_VCPU_ID:
|
||||
r = KVM_MAX_VCPU_ID;
|
||||
break;
|
||||
#ifdef CONFIG_PPC_BOOK3S_64
|
||||
case KVM_CAP_PPC_GET_SMMU_INFO:
|
||||
r = 1;
|
||||
|
|
|
|||
|
|
@ -539,6 +539,7 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
|
|||
break;
|
||||
case KVM_CAP_NR_VCPUS:
|
||||
case KVM_CAP_MAX_VCPUS:
|
||||
case KVM_CAP_MAX_VCPU_ID:
|
||||
r = KVM_S390_BSCA_CPU_SLOTS;
|
||||
if (!kvm_s390_use_sca_entries())
|
||||
r = KVM_MAX_VCPUS;
|
||||
|
|
|
|||
|
|
@ -3122,6 +3122,9 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
|
|||
case KVM_CAP_MAX_VCPUS:
|
||||
r = KVM_MAX_VCPUS;
|
||||
break;
|
||||
case KVM_CAP_MAX_VCPU_ID:
|
||||
r = KVM_MAX_VCPU_ID;
|
||||
break;
|
||||
case KVM_CAP_PV_MMU: /* obsolete */
|
||||
r = 0;
|
||||
break;
|
||||
|
|
|
|||
|
|
@ -224,6 +224,9 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
|
|||
case KVM_CAP_MAX_VCPUS:
|
||||
r = KVM_MAX_VCPUS;
|
||||
break;
|
||||
case KVM_CAP_MAX_VCPU_ID:
|
||||
r = KVM_MAX_VCPU_ID;
|
||||
break;
|
||||
case KVM_CAP_MSI_DEVID:
|
||||
if (!kvm)
|
||||
r = -EINVAL;
|
||||
|
|
|
|||
|
|
@ -1795,8 +1795,10 @@ void kvm_vcpu_unmap(struct kvm_vcpu *vcpu, struct kvm_host_map *map,
|
|||
|
||||
if (map->page)
|
||||
kunmap(map->page);
|
||||
#ifdef CONFIG_HAS_IOMEM
|
||||
else
|
||||
memunmap(map->hva);
|
||||
#endif
|
||||
|
||||
if (dirty) {
|
||||
kvm_vcpu_mark_page_dirty(vcpu, map->gfn);
|
||||
|
|
@ -3149,8 +3151,6 @@ static long kvm_vm_ioctl_check_extension_generic(struct kvm *kvm, long arg)
|
|||
case KVM_CAP_MULTI_ADDRESS_SPACE:
|
||||
return KVM_ADDRESS_SPACE_NUM;
|
||||
#endif
|
||||
case KVM_CAP_MAX_VCPU_ID:
|
||||
return KVM_MAX_VCPU_ID;
|
||||
case KVM_CAP_NR_MEMSLOTS:
|
||||
return KVM_USER_MEM_SLOTS;
|
||||
default:
|
||||
|
|
|
|||
Loading…
Reference in New Issue