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authorLijian.Zhang <Lijian.Zhang@arm.com>2019-08-21 17:51:16 +0800
committerDamjan Marion <dmarion@me.com>2019-09-03 15:55:40 +0000
commitba0da570f264785f6b50eff7829f6653c0924069 (patch)
tree086908ccf181fd345ebaee7c1d92fb6685c83ed7 /src/vnet/devices/tap
parent017dc45243bad1b3708d0a9b902d23ca47859344 (diff)
tap: fix tap interface not working on Arm issue
The VPP code tries to set all userspace memory in the table via IOCTL to VHOST_SET_MEM_TABLE. But on aarch64, the userspace address range is larger (48 bits) than that on x86 (47 bits). Below is an segment from /proc/[vpp]/maps. fffb41200000-fffb43a00000 rw-s 00000000 00:0e 532232 /anon_hugepage (deleted) Instead of setting all userspace memory space to vhost-net, will only set the address space reserved by pmalloc module during initialization. Type: fix Change-Id: I91cb35e990869b42094cf2cd0512593733d33677 Signed-off-by: Lijian Zhang <Lijian.Zhang@arm.com> Reviewed-by: Steve Capper <Steve.Capper@arm.com>
Diffstat (limited to 'src/vnet/devices/tap')
-rw-r--r--src/vnet/devices/tap/tap.c7
1 files changed, 6 insertions, 1 deletions
diff --git a/src/vnet/devices/tap/tap.c b/src/vnet/devices/tap/tap.c
index 0d7916d7ee2..917bd10644c 100644
--- a/src/vnet/devices/tap/tap.c
+++ b/src/vnet/devices/tap/tap.c
@@ -31,6 +31,7 @@
#include <linux/rtnetlink.h>
#include <vlib/vlib.h>
+#include <vlib/physmem.h>
#include <vlib/unix/unix.h>
#include <vnet/ethernet/ethernet.h>
#include <vnet/ip/ip4_packet.h>
@@ -112,6 +113,7 @@ open_netns_fd (char *netns)
void
tap_create_if (vlib_main_t * vm, tap_create_if_args_t * args)
{
+ vlib_physmem_main_t *vpm = &vm->physmem_main;
vnet_main_t *vnm = vnet_get_main ();
virtio_main_t *vim = &virtio_main;
tap_main_t *tm = &tap_main;
@@ -391,7 +393,10 @@ tap_create_if (vlib_main_t * vm, tap_create_if_args_t * args)
vhost_mem = clib_mem_alloc (i);
clib_memset (vhost_mem, 0, i);
vhost_mem->nregions = 1;
- vhost_mem->regions[0].memory_size = (1ULL << 47) - 4096;
+ vhost_mem->regions[0].memory_size = vpm->max_size;
+ vhost_mem->regions[0].guest_phys_addr = vpm->base_addr;
+ vhost_mem->regions[0].userspace_addr =
+ vhost_mem->regions[0].guest_phys_addr;
_IOCTL (vif->fd, VHOST_SET_MEM_TABLE, vhost_mem);
if ((args->error =