Searched hist:"9 db7f2b8" (Results 1 – 2 of 2) sorted by relevance
| /openbmc/linux/arch/s390/net/ |
| H A D | bpf_jit.h | 9db7f2b8 Wed Jul 29 14:15:18 CDT 2015 Michael Holzheu <holzheu@linux.vnet.ibm.com> s390/bpf: recache skb->data/hlen for skb_vlan_push/pop
Allow eBPF programs attached to TC qdiscs call skb_vlan_push/pop
via helper functions. These functions may change skb->data/hlen.
This data is cached by s390 JIT to improve performance of ld_abs/ld_ind
instructions. Therefore after a change we have to reload the data.
In case of usage of skb_vlan_push/pop, in the prologue we store
the SKB pointer on the stack and restore it after BPF_JMP_CALL
to skb_vlan_push/pop.
Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9db7f2b8 Wed Jul 29 14:15:18 CDT 2015 Michael Holzheu <holzheu@linux.vnet.ibm.com> s390/bpf: recache skb->data/hlen for skb_vlan_push/pop
Allow eBPF programs attached to TC qdiscs call skb_vlan_push/pop
via helper functions. These functions may change skb->data/hlen.
This data is cached by s390 JIT to improve performance of ld_abs/ld_ind
instructions. Therefore after a change we have to reload the data.
In case of usage of skb_vlan_push/pop, in the prologue we store
the SKB pointer on the stack and restore it after BPF_JMP_CALL
to skb_vlan_push/pop.
Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
| H A D | bpf_jit_comp.c | 9db7f2b8 Wed Jul 29 14:15:18 CDT 2015 Michael Holzheu <holzheu@linux.vnet.ibm.com> s390/bpf: recache skb->data/hlen for skb_vlan_push/pop
Allow eBPF programs attached to TC qdiscs call skb_vlan_push/pop
via helper functions. These functions may change skb->data/hlen.
This data is cached by s390 JIT to improve performance of ld_abs/ld_ind
instructions. Therefore after a change we have to reload the data.
In case of usage of skb_vlan_push/pop, in the prologue we store
the SKB pointer on the stack and restore it after BPF_JMP_CALL
to skb_vlan_push/pop.
Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
9db7f2b8 Wed Jul 29 14:15:18 CDT 2015 Michael Holzheu <holzheu@linux.vnet.ibm.com> s390/bpf: recache skb->data/hlen for skb_vlan_push/pop
Allow eBPF programs attached to TC qdiscs call skb_vlan_push/pop
via helper functions. These functions may change skb->data/hlen.
This data is cached by s390 JIT to improve performance of ld_abs/ld_ind
instructions. Therefore after a change we have to reload the data.
In case of usage of skb_vlan_push/pop, in the prologue we store
the SKB pointer on the stack and restore it after BPF_JMP_CALL
to skb_vlan_push/pop.
Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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