This patch defines macro __KVM_HAVE_ARCH_KVM_VFIO_POSTING and implement kvm_arch_vfio_update_pi_irte for x86 architecture.
Signed-off-by: Feng Wu <feng...@intel.com> --- arch/x86/include/asm/kvm_host.h | 2 + arch/x86/kvm/Makefile | 2 +- arch/x86/kvm/kvm_vfio_x86.c | 68 +++++++++++++++++++++++++++++++++++++++ 3 files changed, 71 insertions(+), 1 deletions(-) create mode 100644 arch/x86/kvm/kvm_vfio_x86.c diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h index 9b45b78..6878429 100644 --- a/arch/x86/include/asm/kvm_host.h +++ b/arch/x86/include/asm/kvm_host.h @@ -82,6 +82,8 @@ static inline gfn_t gfn_to_index(gfn_t gfn, gfn_t base_gfn, int level) (base_gfn >> KVM_HPAGE_GFN_SHIFT(level)); } +#define __KVM_HAVE_ARCH_KVM_VFIO_POSTING + #define SELECTOR_TI_MASK (1 << 2) #define SELECTOR_RPL_MASK 0x03 diff --git a/arch/x86/kvm/Makefile b/arch/x86/kvm/Makefile index 25d22b2..8809d58 100644 --- a/arch/x86/kvm/Makefile +++ b/arch/x86/kvm/Makefile @@ -14,7 +14,7 @@ kvm-$(CONFIG_KVM_DEVICE_ASSIGNMENT) += $(KVM)/assigned-dev.o $(KVM)/iommu.o kvm-$(CONFIG_KVM_ASYNC_PF) += $(KVM)/async_pf.o kvm-y += x86.o mmu.o emulate.o i8259.o irq.o lapic.o \ - i8254.o cpuid.o pmu.o + i8254.o cpuid.o pmu.o kvm_vfio_x86.o kvm-intel-y += vmx.o kvm-amd-y += svm.o diff --git a/arch/x86/kvm/kvm_vfio_x86.c b/arch/x86/kvm/kvm_vfio_x86.c new file mode 100644 index 0000000..c59a31a --- /dev/null +++ b/arch/x86/kvm/kvm_vfio_x86.c @@ -0,0 +1,68 @@ +/* + * Copyright (C) 2014 Intel Corporation. + * Authors: Feng Wu <feng...@intel.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License, version 2, as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <linux/kvm_host.h> +#include <asm/irq_remapping.h> + +/* + * kvm_arch_vfio_update_pi_irte - set IRTE for Posted-Interrupts + * + * @kvm: kvm + * @host_irq: host irq of the interrupt + * @guest_irq: gsi of the interrupt + * returns 0 on success, < 0 on failure + */ +int kvm_arch_vfio_update_pi_irte(struct kvm *kvm, unsigned int host_irq, + uint32_t guest_irq) +{ + struct kvm_kernel_irq_routing_entry *e; + struct kvm_irq_routing_table *irq_rt; + struct kvm_lapic_irq irq; + struct kvm_vcpu *vcpu; + struct vcpu_data vcpu_info; + int idx, ret = -EINVAL; + + idx = srcu_read_lock(&kvm->irq_srcu); + irq_rt = srcu_dereference(kvm->irq_routing, &kvm->irq_srcu); + BUG_ON(guest_irq >= irq_rt->nr_rt_entries); + + hlist_for_each_entry(e, &irq_rt->map[guest_irq], link) { + if (e->type != KVM_IRQ_ROUTING_MSI) + continue; + /* + * VT-d PI cannot support posting multicast/broadcast + * interrupts to a VCPU, we still use interrupt remapping + * for these kind of interrupts. + */ + + kvm_set_msi_irq(e, &irq); + if (!kvm_find_dest_vcpu(kvm, &irq, &vcpu)) + continue; + + vcpu_info.pi_desc_addr = kvm_x86_ops->get_pi_desc_addr(vcpu); + vcpu_info.vector = irq.vector; + + if (irq_set_vcpu_affinity(host_irq, &vcpu_info) < 0) { + printk(KERN_INFO "%s: failed to update PI IRTE\n", + __func__); + ret = -EINVAL; + goto out; + } + } + + ret = 0; +out: + srcu_read_unlock(&kvm->irq_srcu, idx); + return ret; +} -- 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