From: Michael S. Tsirkin Date: Thu, 4 Apr 2013 10:27:21 +0000 (+0300) Subject: kvm: fix MMIO/PIO collision misdetection X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=05e07f9bdb0ea3c1c52029e6c4db77c9f7c92a5c;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git kvm: fix MMIO/PIO collision misdetection PIO and MMIO are separate address spaces, but ioeventfd registration code mistakenly detected two eventfds as duplicate if they use the same address, even if one is PIO and another one MMIO. Reviewed-by: Paolo Bonzini Signed-off-by: Michael S. Tsirkin Signed-off-by: Gleb Natapov --- diff --git a/virt/kvm/eventfd.c b/virt/kvm/eventfd.c index 020522ed9094..48790989f8d2 100644 --- a/virt/kvm/eventfd.c +++ b/virt/kvm/eventfd.c @@ -574,6 +574,7 @@ struct _ioeventfd { struct eventfd_ctx *eventfd; u64 datamatch; struct kvm_io_device dev; + u8 bus_idx; bool wildcard; }; @@ -666,7 +667,8 @@ ioeventfd_check_collision(struct kvm *kvm, struct _ioeventfd *p) struct _ioeventfd *_p; list_for_each_entry(_p, &kvm->ioeventfds, list) - if (_p->addr == p->addr && _p->length == p->length && + if (_p->bus_idx == p->bus_idx && + _p->addr == p->addr && _p->length == p->length && (_p->wildcard || p->wildcard || _p->datamatch == p->datamatch)) return true; @@ -723,6 +725,7 @@ kvm_assign_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args) INIT_LIST_HEAD(&p->list); p->addr = args->addr; + p->bus_idx = bus_idx; p->length = args->len; p->eventfd = eventfd; @@ -781,7 +784,8 @@ kvm_deassign_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args) list_for_each_entry_safe(p, tmp, &kvm->ioeventfds, list) { bool wildcard = !(args->flags & KVM_IOEVENTFD_FLAG_DATAMATCH); - if (p->eventfd != eventfd || + if (p->bus_idx != bus_idx || + p->eventfd != eventfd || p->addr != args->addr || p->length != args->len || p->wildcard != wildcard)