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selftests/bpf: Fix xdp_do_redirect on s390x

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[ Upstream commit 06c1865b0b ]

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: Ilya Leoshkevich <iii@linux.ibm.com>
Link: https://lore.kernel.org/r/20230128000650.1516334-11-iii@linux.ibm.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Stable-dep-of: 6c20822fad ("bpf, test_run: fix &xdp_frame misplacement for LIVE_FRAMES")
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Ilya Leoshkevich 2023-01-28 01:06:29 +01:00 committed by Greg Kroah-Hartman
parent 678ea18d62
commit 026ba2f776
1 changed files with 4 additions and 0 deletions
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4
tools/testing/selftests/bpf/prog_tests/xdp_do_redirect.c
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@ -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] = {};