Now that all ITS emulation functionality is in place, we advertise MSI functionality to userland and also the ITS device to the guest - if userland has configured that. Signed-off-by: Andre Przywara <andre.przywara@xxxxxxx> --- Documentation/virtual/kvm/api.txt | 2 +- arch/arm64/kvm/Kconfig | 1 + arch/arm64/kvm/reset.c | 10 ++++++++++ include/kvm/vgic/vgic.h | 5 +++++ virt/kvm/arm/vgic.c | 5 +++++ virt/kvm/arm/vgic/vgic-init.c | 3 +++ virt/kvm/arm/vgic/vgic-mmio-v3.c | 14 ++++++++++---- virt/kvm/arm/vgic/vgic.c | 8 ++++++++ 8 files changed, 43 insertions(+), 5 deletions(-) diff --git a/Documentation/virtual/kvm/api.txt b/Documentation/virtual/kvm/api.txt index bf76639..f60b137 100644 --- a/Documentation/virtual/kvm/api.txt +++ b/Documentation/virtual/kvm/api.txt @@ -2156,7 +2156,7 @@ after pausing the vcpu, but before it is resumed. 4.71 KVM_SIGNAL_MSI Capability: KVM_CAP_SIGNAL_MSI -Architectures: x86 +Architectures: x86 arm64 Type: vm ioctl Parameters: struct kvm_msi (in) Returns: >0 on delivery, 0 if guest blocked the MSI, and -1 on error diff --git a/arch/arm64/kvm/Kconfig b/arch/arm64/kvm/Kconfig index c4f26ef..446686a 100644 --- a/arch/arm64/kvm/Kconfig +++ b/arch/arm64/kvm/Kconfig @@ -36,6 +36,7 @@ config KVM select HAVE_KVM_IRQFD select KVM_ARM_VGIC_V3 select KVM_ARM_PMU if HW_PERF_EVENTS + select HAVE_KVM_MSI ---help--- Support hosting virtualized guest machines. We don't support KVM with 16K page tables yet, due to the multiple diff --git a/arch/arm64/kvm/reset.c b/arch/arm64/kvm/reset.c index 6ec9dfe..409d188 100644 --- a/arch/arm64/kvm/reset.c +++ b/arch/arm64/kvm/reset.c @@ -86,6 +86,16 @@ int kvm_arch_dev_ioctl_check_extension(struct kvm *kvm, long ext) case KVM_CAP_VCPU_ATTRIBUTES: r = 1; break; + case KVM_CAP_MSI_DEVID: +#ifdef CONFIG_KVM_NEW_VGIC + if (!kvm) + r = -EINVAL; + else + r = kvm->arch.vgic.msis_require_devid; +#else + r = -EINVAL; +#endif + break; default: r = 0; } diff --git a/include/kvm/vgic/vgic.h b/include/kvm/vgic/vgic.h index 2b00fb3..d7a6da3 100644 --- a/include/kvm/vgic/vgic.h +++ b/include/kvm/vgic/vgic.h @@ -154,6 +154,9 @@ struct vgic_dist { /* vGIC model the kernel emulates for the guest (GICv2 or GICv3) */ u32 vgic_model; + /* Do injected MSIs require an additional device ID? */ + bool msis_require_devid; + int nr_spis; /* TODO: Consider moving to global state */ @@ -298,4 +301,6 @@ static inline int kvm_vgic_get_max_vcpus(void) return kvm_vgic_global_state.max_gic_vcpus; } +int kvm_send_userspace_msi(struct kvm *kvm, struct kvm_msi *msi); + #endif /* __ASM_ARM_KVM_VGIC_VGIC_H */ diff --git a/virt/kvm/arm/vgic.c b/virt/kvm/arm/vgic.c index c3bfbb9..26db30a 100644 --- a/virt/kvm/arm/vgic.c +++ b/virt/kvm/arm/vgic.c @@ -2438,3 +2438,8 @@ int kvm_set_msi(struct kvm_kernel_irq_routing_entry *e, { return 0; } + +int kvm_send_userspace_msi(struct kvm *kvm, struct kvm_msi *msi) +{ + return -ENODEV; +} diff --git a/virt/kvm/arm/vgic/vgic-init.c b/virt/kvm/arm/vgic/vgic-init.c index 535e713..01a60dc 100644 --- a/virt/kvm/arm/vgic/vgic-init.c +++ b/virt/kvm/arm/vgic/vgic-init.c @@ -258,6 +258,9 @@ int vgic_init(struct kvm *kvm) if (ret) goto out; + if (vgic_has_its(kvm)) + dist->msis_require_devid = true; + kvm_for_each_vcpu(i, vcpu, kvm) kvm_vgic_vcpu_init(vcpu); diff --git a/virt/kvm/arm/vgic/vgic-mmio-v3.c b/virt/kvm/arm/vgic/vgic-mmio-v3.c index dfa79c7..26f4779 100644 --- a/virt/kvm/arm/vgic/vgic-mmio-v3.c +++ b/virt/kvm/arm/vgic/vgic-mmio-v3.c @@ -66,7 +66,12 @@ static unsigned long vgic_mmio_read_v3_misc(struct kvm_vcpu *vcpu, case GICD_TYPER: value = vcpu->kvm->arch.vgic.nr_spis + VGIC_NR_PRIVATE_IRQS; value = (value >> 5) - 1; - value |= (INTERRUPT_ID_BITS_SPIS - 1) << 19; + if (vgic_has_its(vcpu->kvm)) { + value |= (INTERRUPT_ID_BITS_ITS - 1) << 19; + value |= GICD_TYPER_LPIS; + } else { + value |= (INTERRUPT_ID_BITS_SPIS - 1) << 19; + } break; case GICD_IIDR: value = (PRODUCT_ID_KVM << 24) | (IMPLEMENTER_ARM << 0); @@ -161,9 +166,8 @@ static void vgic_mmio_write_v3r_ctlr(struct kvm_vcpu *vcpu, vgic_cpu->lpis_enabled = val & GICR_CTLR_ENABLE_LPIS; - if (!was_enabled && vgic_cpu->lpis_enabled) { - /* Eventually do something */ - } + if (!was_enabled && vgic_cpu->lpis_enabled) + vgic_enable_lpis(vcpu); } static unsigned long vgic_mmio_read_v3r_typer(struct kvm_vcpu *vcpu, @@ -177,6 +181,8 @@ static unsigned long vgic_mmio_read_v3r_typer(struct kvm_vcpu *vcpu, value |= ((target_vcpu_id & 0xffff) << 8); if (target_vcpu_id == atomic_read(&vcpu->kvm->online_vcpus) - 1) value |= GICR_TYPER_LAST; + if (vgic_has_its(vcpu->kvm)) + value |= GICR_TYPER_PLPIS; return extract_bytes(value, addr & 7, len); } diff --git a/virt/kvm/arm/vgic/vgic.c b/virt/kvm/arm/vgic/vgic.c index 8111d49..f93f8dd 100644 --- a/virt/kvm/arm/vgic/vgic.c +++ b/virt/kvm/arm/vgic/vgic.c @@ -682,3 +682,11 @@ bool kvm_vgic_map_is_active(struct kvm_vcpu *vcpu, unsigned int virt_irq) return map_is_active; } + +int kvm_send_userspace_msi(struct kvm *kvm, struct kvm_msi *msi) +{ + if (vgic_has_its(kvm)) + return vits_inject_msi(kvm, msi); + else + return -ENODEV; +} -- 2.9.0 -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html