VT-d Posted-Interrupts(PI) is an enhancement to CPU side Posted-Interrupt. With VT-d Posted-Interrupts enabled, external interrupts from direct-assigned devices can be delivered to guests without VMM involvement when guest is running in non-root mode.
If VT-d PI is supported by KVM, we need to update the IRTE with the new guest interrtup configuration. Signed-off-by: Feng Wu <feng...@intel.com> --- hw/i386/kvm/pci-assign.c | 24 ++++++++++++++++++++++++ linux-headers/linux/kvm.h | 2 ++ target-i386/kvm.c | 5 +++++ target-i386/kvm_i386.h | 1 + 4 files changed, 32 insertions(+), 0 deletions(-) diff --git a/hw/i386/kvm/pci-assign.c b/hw/i386/kvm/pci-assign.c index bb206da..e55a99b 100644 --- a/hw/i386/kvm/pci-assign.c +++ b/hw/i386/kvm/pci-assign.c @@ -1005,6 +1005,12 @@ static void assigned_dev_update_msi(PCIDevice *pci_dev) assigned_dev->intx_route.mode = PCI_INTX_DISABLED; assigned_dev->intx_route.irq = -1; assigned_dev->assigned_irq_type = ASSIGNED_IRQ_MSI; + + if (kvm_check_extension(kvm_state, KVM_CAP_PI)) { + if (kvm_device_pi_update(kvm_state, assigned_dev->dev_id) < 0) { + perror("assigned_dev_update_msi: kvm_device_pi_update"); + } + } } else { Error *local_err = NULL; @@ -1029,6 +1035,12 @@ static void assigned_dev_update_msi_msg(PCIDevice *pci_dev) kvm_irqchip_update_msi_route(kvm_state, assigned_dev->msi_virq[0], msi_get_message(pci_dev, 0)); + + if (kvm_check_extension(kvm_state, KVM_CAP_PI)) { + if (kvm_device_pi_update(kvm_state, assigned_dev->dev_id) < 0) { + perror("assigned_dev_update_msi_msg: kvm_device_pi_update"); + } + } } static bool assigned_dev_msix_masked(MSIXTableEntry *entry) @@ -1149,6 +1161,12 @@ static void assigned_dev_update_msix(PCIDevice *pci_dev) perror("assigned_dev_enable_msix: assign irq"); return; } + + if (kvm_check_extension(kvm_state, KVM_CAP_PI)) { + if (kvm_device_pi_update(kvm_state, assigned_dev->dev_id) < 0) { + perror("assigned_dev_update_msix: kvm_device_pi_update"); + } + } } assigned_dev->intx_route.mode = PCI_INTX_DISABLED; assigned_dev->intx_route.irq = -1; @@ -1618,6 +1636,12 @@ static void assigned_dev_msix_mmio_write(void *opaque, hwaddr addr, if (ret) { error_report("Error updating irq routing entry (%d)", ret); } + if (kvm_check_extension(kvm_state, KVM_CAP_PI)) { + if (kvm_device_pi_update(kvm_state, adev->dev_id) < 0) { + perror("assigned_dev_update_msi_msg: " + "kvm_device_pi_update"); + } + } } } } diff --git a/linux-headers/linux/kvm.h b/linux-headers/linux/kvm.h index 2669938..b34f3c4 100644 --- a/linux-headers/linux/kvm.h +++ b/linux-headers/linux/kvm.h @@ -765,6 +765,7 @@ struct kvm_ppc_smmu_info { #define KVM_CAP_PPC_FIXUP_HCALL 103 #define KVM_CAP_PPC_ENABLE_HCALL 104 #define KVM_CAP_CHECK_EXTENSION_VM 105 +#define KVM_CAP_PI 106 #ifdef KVM_CAP_IRQ_ROUTING @@ -1020,6 +1021,7 @@ struct kvm_s390_ucas_mapping { #define KVM_XEN_HVM_CONFIG _IOW(KVMIO, 0x7a, struct kvm_xen_hvm_config) #define KVM_SET_CLOCK _IOW(KVMIO, 0x7b, struct kvm_clock_data) #define KVM_GET_CLOCK _IOR(KVMIO, 0x7c, struct kvm_clock_data) +#define KVM_ASSIGN_DEV_PI_UPDATE _IOR(KVMIO, 0x7d, __u32) /* Available with KVM_CAP_PIT_STATE2 */ #define KVM_GET_PIT2 _IOR(KVMIO, 0x9f, struct kvm_pit_state2) #define KVM_SET_PIT2 _IOW(KVMIO, 0xa0, struct kvm_pit_state2) diff --git a/target-i386/kvm.c b/target-i386/kvm.c index ccf36e8..3dd8e5e 100644 --- a/target-i386/kvm.c +++ b/target-i386/kvm.c @@ -2660,6 +2660,11 @@ int kvm_device_msi_assign(KVMState *s, uint32_t dev_id, int virq) KVM_DEV_IRQ_GUEST_MSI, virq); } +int kvm_device_pi_update(KVMState *s, uint32_t dev_id) +{ + return kvm_vm_ioctl(s, KVM_ASSIGN_DEV_PI_UPDATE, &dev_id); +} + int kvm_device_msi_deassign(KVMState *s, uint32_t dev_id) { return kvm_deassign_irq_internal(s, dev_id, KVM_DEV_IRQ_GUEST_MSI | diff --git a/target-i386/kvm_i386.h b/target-i386/kvm_i386.h index cac30fd..c119b3e 100644 --- a/target-i386/kvm_i386.h +++ b/target-i386/kvm_i386.h @@ -37,4 +37,5 @@ int kvm_device_msix_set_vector(KVMState *s, uint32_t dev_id, uint32_t vector, int kvm_device_msix_assign(KVMState *s, uint32_t dev_id); int kvm_device_msix_deassign(KVMState *s, uint32_t dev_id); +int kvm_device_pi_update(KVMState *s, uint32_t dev_id); #endif -- 1.7.1 -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html