Commit 06c1865b authored by Ilya Leoshkevich's avatar Ilya Leoshkevich Committed by Alexei Starovoitov
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selftests/bpf: Fix xdp_do_redirect on s390x 



s390x cache line size is 256 bytes, so skb_shared_info must be aligned
on a much larger boundary than for x86. This makes the maximum packet
size smaller.

Signed-off-by: default avatarIlya Leoshkevich <iii@linux.ibm.com>
Link: https://lore.kernel.org/r/20230128000650.1516334-11-iii@linux.ibm.com


Signed-off-by: default avatarAlexei Starovoitov <ast@kernel.org>
parent 56e1a504

tools/testing/selftests/bpf/prog_tests/xdp_do_redirect.c

+4 −0
Original line number Diff line number Diff line
@@ -65,7 +65,11 @@ static int attach_tc_prog(struct bpf_tc_hook *hook, int fd) 
/* The maximum permissible size is: PAGE_SIZE - sizeof(struct xdp_page_head) -

 * sizeof(struct skb_shared_info) - XDP_PACKET_HEADROOM = 3368 bytes

 */

#if defined(__s390x__)

#define MAX_PKT_SIZE 3176

#else

#define MAX_PKT_SIZE 3368

#endif

static void test_max_pkt_size(int fd)

{

	char data[MAX_PKT_SIZE + 1] = {};