From 7ed0919119b0e7a6b7db1dcaca3a2cb30c771dd1 Mon Sep 17 00:00:00 2001 From: Steve Sistare Date: Wed, 2 Jul 2025 14:58:40 -0700 Subject: migration: close kvm after cpr MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit cpr-transfer breaks vfio network connectivity to and from the guest, and the host system log shows: irq bypass consumer (token 00000000a03c32e5) registration fails: -16 which is EBUSY. This occurs because KVM descriptors are still open in the old QEMU process. Close them. Cc: Paolo Bonzini Signed-off-by: Steve Sistare Reviewed-by: Fabiano Rosas Link: https://lore.kernel.org/qemu-devel/1751493538-202042-4-git-send-email-steven.sistare@oracle.com Signed-off-by: Cédric Le Goater --- hw/vfio/helpers.c | 11 +++++++++++ 1 file changed, 11 insertions(+) (limited to 'hw/vfio/helpers.c') diff --git a/hw/vfio/helpers.c b/hw/vfio/helpers.c index d0dbab1d17..9a5f621545 100644 --- a/hw/vfio/helpers.c +++ b/hw/vfio/helpers.c @@ -117,6 +117,17 @@ bool vfio_get_info_dma_avail(struct vfio_iommu_type1_info *info, int vfio_kvm_device_fd = -1; #endif +void vfio_kvm_device_close(void) +{ +#ifdef CONFIG_KVM + kvm_close(); + if (vfio_kvm_device_fd != -1) { + close(vfio_kvm_device_fd); + vfio_kvm_device_fd = -1; + } +#endif +} + int vfio_kvm_device_add_fd(int fd, Error **errp) { #ifdef CONFIG_KVM -- cgit 1.4.1