diff options
author | Tetsuya Mukawa <mukawa@igel.co.jp> | 2015-12-21 12:47:34 +0900 |
---|---|---|
committer | Timothy Pearson <tpearson@raptorengineering.com> | 2019-11-29 19:28:22 -0600 |
commit | bb0e8fbf4ae4070bc9f26767dc5b85ba66ba3cc6 (patch) | |
tree | fa442f1dc1cfde13a1b14886462e1179b97f6562 /hw/misc | |
parent | 3ac7779ce87d71ae7b717d2254f61c6ce560ba0b (diff) | |
download | hqemu-bb0e8fbf4ae4070bc9f26767dc5b85ba66ba3cc6.zip hqemu-bb0e8fbf4ae4070bc9f26767dc5b85ba66ba3cc6.tar.gz |
ivshmem: Store file descriptor for vhost-user negotiation
If virtio-net driver allocates memory in ivshmem shared memory,
vhost-net will work correctly, but vhost-user will not work because
a fd of shared memory will not be sent to vhost-user backend.
This patch fixes ivshmem to store file descriptor of shared memory.
It will be used when vhost-user negotiates vhost-user backend.
Signed-off-by: Tetsuya Mukawa <mukawa@igel.co.jp>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'hw/misc')
-rw-r--r-- | hw/misc/ivshmem.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/hw/misc/ivshmem.c b/hw/misc/ivshmem.c index f73f0c2..df585de 100644 --- a/hw/misc/ivshmem.c +++ b/hw/misc/ivshmem.c @@ -29,6 +29,7 @@ #include "sysemu/char.h" #include "sysemu/hostmem.h" #include "qapi/visitor.h" +#include "exec/ram_addr.h" #include "hw/misc/ivshmem.h" @@ -422,6 +423,7 @@ static int create_shared_memory_BAR(IVShmemState *s, int fd, uint8_t attr, memory_region_init_ram_ptr(&s->ivshmem, OBJECT(s), "ivshmem.bar2", s->ivshmem_size, ptr); + qemu_set_ram_fd(s->ivshmem.ram_addr, fd); vmstate_register_ram(&s->ivshmem, DEVICE(s)); memory_region_add_subregion(&s->bar, 0, &s->ivshmem); @@ -682,6 +684,7 @@ static void ivshmem_read(void *opaque, const uint8_t *buf, int size) } memory_region_init_ram_ptr(&s->ivshmem, OBJECT(s), "ivshmem.bar2", s->ivshmem_size, map_ptr); + qemu_set_ram_fd(s->ivshmem.ram_addr, incoming_fd); vmstate_register_ram(&s->ivshmem, DEVICE(s)); IVSHMEM_DPRINTF("guest h/w addr = %p, size = %" PRIu64 "\n", @@ -689,7 +692,6 @@ static void ivshmem_read(void *opaque, const uint8_t *buf, int size) memory_region_add_subregion(&s->bar, 0, &s->ivshmem); - close(incoming_fd); return; } @@ -991,7 +993,6 @@ static void pci_ivshmem_realize(PCIDevice *dev, Error **errp) } create_shared_memory_BAR(s, fd, attr, errp); - close(fd); } } @@ -1010,11 +1011,15 @@ static void pci_ivshmem_exit(PCIDevice *dev) if (memory_region_is_mapped(&s->ivshmem)) { if (!s->hostmem) { void *addr = memory_region_get_ram_ptr(&s->ivshmem); + int fd; if (munmap(addr, s->ivshmem_size) == -1) { error_report("Failed to munmap shared memory %s", strerror(errno)); } + + if ((fd = qemu_get_ram_fd(s->ivshmem.ram_addr)) != -1) + close(fd); } vmstate_unregister_ram(&s->ivshmem, DEVICE(dev)); |