From: "Michael S. Tsirkin" <[email protected]> This patch looks like it should be in the 3.10-stable tree, should we apply it?
------------------ From: "Michael S. Tsirkin <[email protected]>" commit 05e07f9bdb0ea3c1c52029e6c4db77c9f7c92a5c upstream 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 <[email protected]> Signed-off-by: Michael S. Tsirkin <[email protected]> Signed-off-by: Gleb Natapov <[email protected]> Signed-off-by: Jonghwan Choi <[email protected]> --- virt/kvm/eventfd.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/virt/kvm/eventfd.c b/virt/kvm/eventfd.c index adb17f2..93e5b05 100644 --- a/virt/kvm/eventfd.c +++ b/virt/kvm/eventfd.c @@ -577,6 +577,7 @@ struct _ioeventfd { struct eventfd_ctx *eventfd; u64 datamatch; struct kvm_io_device dev; + u8 bus_idx; bool wildcard; }; @@ -669,7 +670,8 @@ 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; @@ -717,6 +719,7 @@ 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; @@ -775,7 +778,8 @@ 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) -- 1.8.1.2 -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
