Message ID | e53234cdee6a92357d06c80c03d77c19cdefb804.1646422845.git.isaku.yamahata@intel.com (mailing list archive) |
---|---|
State | New, archived |
Headers | show |
Series | KVM TDX basic feature support | expand |
On 3/4/22 20:48, isaku.yamahata@intel.com wrote: > From: Sean Christopherson <sean.j.christopherson@intel.com> > > For TDX guests, the maximum number of vcpus needs to be specified when the > TDX guest VM is initialized (creating the TDX data corresponding to TDX > guest) before creating vcpu. It needs to record the maximum number of > vcpus on VM creation (KVM_CREATE_VM) and return error if the number of > vcpus exceeds it > > Because there is already max_vcpu member in arm64 struct kvm_arch, move it > to common struct kvm and initialize it to KVM_MAX_VCPUS before > kvm_arch_init_vm() instead of adding it to x86 struct kvm_arch. > > Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com> > Signed-off-by: Isaku Yamahata <isaku.yamahata@intel.com> > --- > arch/arm64/include/asm/kvm_host.h | 3 --- > arch/arm64/kvm/arm.c | 6 +++--- > arch/arm64/kvm/vgic/vgic-init.c | 6 +++--- > include/linux/kvm_host.h | 1 + > virt/kvm/kvm_main.c | 3 ++- > 5 files changed, 9 insertions(+), 10 deletions(-) > > diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h > index 5bc01e62c08a..27249d634605 100644 > --- a/arch/arm64/include/asm/kvm_host.h > +++ b/arch/arm64/include/asm/kvm_host.h > @@ -107,9 +107,6 @@ struct kvm_arch { > /* VTCR_EL2 value for this VM */ > u64 vtcr; > > - /* The maximum number of vCPUs depends on the used GIC model */ > - int max_vcpus; > - > /* Interrupt controller */ > struct vgic_dist vgic; > > diff --git a/arch/arm64/kvm/arm.c b/arch/arm64/kvm/arm.c > index ecc5958e27fe..defec2cd94bd 100644 > --- a/arch/arm64/kvm/arm.c > +++ b/arch/arm64/kvm/arm.c > @@ -153,7 +153,7 @@ int kvm_arch_init_vm(struct kvm *kvm, unsigned long type) > kvm_vgic_early_init(kvm); > > /* The maximum number of VCPUs is limited by the host's GIC model */ > - kvm->arch.max_vcpus = kvm_arm_default_max_vcpus(); > + kvm->max_vcpus = kvm_arm_default_max_vcpus(); > > set_default_spectre(kvm); > > @@ -229,7 +229,7 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext) > case KVM_CAP_MAX_VCPUS: > case KVM_CAP_MAX_VCPU_ID: > if (kvm) > - r = kvm->arch.max_vcpus; > + r = kvm->max_vcpus; > else > r = kvm_arm_default_max_vcpus(); > break; > @@ -305,7 +305,7 @@ int kvm_arch_vcpu_precreate(struct kvm *kvm, unsigned int id) > if (irqchip_in_kernel(kvm) && vgic_initialized(kvm)) > return -EBUSY; > > - if (id >= kvm->arch.max_vcpus) > + if (id >= kvm->max_vcpus) > return -EINVAL; > > return 0; > diff --git a/arch/arm64/kvm/vgic/vgic-init.c b/arch/arm64/kvm/vgic/vgic-init.c > index fc00304fe7d8..77feafd5c0e3 100644 > --- a/arch/arm64/kvm/vgic/vgic-init.c > +++ b/arch/arm64/kvm/vgic/vgic-init.c > @@ -98,11 +98,11 @@ int kvm_vgic_create(struct kvm *kvm, u32 type) > ret = 0; > > if (type == KVM_DEV_TYPE_ARM_VGIC_V2) > - kvm->arch.max_vcpus = VGIC_V2_MAX_CPUS; > + kvm->max_vcpus = VGIC_V2_MAX_CPUS; > else > - kvm->arch.max_vcpus = VGIC_V3_MAX_CPUS; > + kvm->max_vcpus = VGIC_V3_MAX_CPUS; > > - if (atomic_read(&kvm->online_vcpus) > kvm->arch.max_vcpus) { > + if (atomic_read(&kvm->online_vcpus) > kvm->max_vcpus) { > ret = -E2BIG; > goto out_unlock; > } > diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h > index f11039944c08..a56044a31bc6 100644 > --- a/include/linux/kvm_host.h > +++ b/include/linux/kvm_host.h > @@ -715,6 +715,7 @@ struct kvm { > * and is accessed atomically. > */ > atomic_t online_vcpus; > + int max_vcpus; > int created_vcpus; > int last_boosted_vcpu; > struct list_head vm_list; > diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c > index 52f72a366beb..3adee9c6b370 100644 > --- a/virt/kvm/kvm_main.c > +++ b/virt/kvm/kvm_main.c > @@ -1075,6 +1075,7 @@ static struct kvm *kvm_create_vm(unsigned long type) > spin_lock_init(&kvm->gpc_lock); > > INIT_LIST_HEAD(&kvm->devices); > + kvm->max_vcpus = KVM_MAX_VCPUS; > > BUILD_BUG_ON(KVM_MEM_SLOTS_NUM > SHRT_MAX); > > @@ -3718,7 +3719,7 @@ static int kvm_vm_ioctl_create_vcpu(struct kvm *kvm, u32 id) > return -EINVAL; > > mutex_lock(&kvm->lock); > - if (kvm->created_vcpus == KVM_MAX_VCPUS) { > + if (kvm->created_vcpus >= kvm->max_vcpus) { > mutex_unlock(&kvm->lock); > return -EINVAL; > } Queued this one already, thanks. Paolo
diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h index 5bc01e62c08a..27249d634605 100644 --- a/arch/arm64/include/asm/kvm_host.h +++ b/arch/arm64/include/asm/kvm_host.h @@ -107,9 +107,6 @@ struct kvm_arch { /* VTCR_EL2 value for this VM */ u64 vtcr; - /* The maximum number of vCPUs depends on the used GIC model */ - int max_vcpus; - /* Interrupt controller */ struct vgic_dist vgic; diff --git a/arch/arm64/kvm/arm.c b/arch/arm64/kvm/arm.c index ecc5958e27fe..defec2cd94bd 100644 --- a/arch/arm64/kvm/arm.c +++ b/arch/arm64/kvm/arm.c @@ -153,7 +153,7 @@ int kvm_arch_init_vm(struct kvm *kvm, unsigned long type) kvm_vgic_early_init(kvm); /* The maximum number of VCPUs is limited by the host's GIC model */ - kvm->arch.max_vcpus = kvm_arm_default_max_vcpus(); + kvm->max_vcpus = kvm_arm_default_max_vcpus(); set_default_spectre(kvm); @@ -229,7 +229,7 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext) case KVM_CAP_MAX_VCPUS: case KVM_CAP_MAX_VCPU_ID: if (kvm) - r = kvm->arch.max_vcpus; + r = kvm->max_vcpus; else r = kvm_arm_default_max_vcpus(); break; @@ -305,7 +305,7 @@ int kvm_arch_vcpu_precreate(struct kvm *kvm, unsigned int id) if (irqchip_in_kernel(kvm) && vgic_initialized(kvm)) return -EBUSY; - if (id >= kvm->arch.max_vcpus) + if (id >= kvm->max_vcpus) return -EINVAL; return 0; diff --git a/arch/arm64/kvm/vgic/vgic-init.c b/arch/arm64/kvm/vgic/vgic-init.c index fc00304fe7d8..77feafd5c0e3 100644 --- a/arch/arm64/kvm/vgic/vgic-init.c +++ b/arch/arm64/kvm/vgic/vgic-init.c @@ -98,11 +98,11 @@ int kvm_vgic_create(struct kvm *kvm, u32 type) ret = 0; if (type == KVM_DEV_TYPE_ARM_VGIC_V2) - kvm->arch.max_vcpus = VGIC_V2_MAX_CPUS; + kvm->max_vcpus = VGIC_V2_MAX_CPUS; else - kvm->arch.max_vcpus = VGIC_V3_MAX_CPUS; + kvm->max_vcpus = VGIC_V3_MAX_CPUS; - if (atomic_read(&kvm->online_vcpus) > kvm->arch.max_vcpus) { + if (atomic_read(&kvm->online_vcpus) > kvm->max_vcpus) { ret = -E2BIG; goto out_unlock; } diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h index f11039944c08..a56044a31bc6 100644 --- a/include/linux/kvm_host.h +++ b/include/linux/kvm_host.h @@ -715,6 +715,7 @@ struct kvm { * and is accessed atomically. */ atomic_t online_vcpus; + int max_vcpus; int created_vcpus; int last_boosted_vcpu; struct list_head vm_list; diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c index 52f72a366beb..3adee9c6b370 100644 --- a/virt/kvm/kvm_main.c +++ b/virt/kvm/kvm_main.c @@ -1075,6 +1075,7 @@ static struct kvm *kvm_create_vm(unsigned long type) spin_lock_init(&kvm->gpc_lock); INIT_LIST_HEAD(&kvm->devices); + kvm->max_vcpus = KVM_MAX_VCPUS; BUILD_BUG_ON(KVM_MEM_SLOTS_NUM > SHRT_MAX); @@ -3718,7 +3719,7 @@ static int kvm_vm_ioctl_create_vcpu(struct kvm *kvm, u32 id) return -EINVAL; mutex_lock(&kvm->lock); - if (kvm->created_vcpus == KVM_MAX_VCPUS) { + if (kvm->created_vcpus >= kvm->max_vcpus) { mutex_unlock(&kvm->lock); return -EINVAL; }