selftests/bpf: Add some tests for LoongArch#12148
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kernel-patches-daemon-bpf[bot] wants to merge 2 commits into
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selftests/bpf: Add some tests for LoongArch#12148kernel-patches-daemon-bpf[bot] wants to merge 2 commits into
kernel-patches-daemon-bpf[bot] wants to merge 2 commits into
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There is no LoongArch support for get_preempt_count() currently and its fallback path always returns 0, just add it so that bpf_in_interrupt(), bpf_in_nmi(), bpf_in_hardirq(), bpf_in_serving_softirq(), bpf_in_task() work for LoongArch as well. Since LoongArch is transitioning to CONFIG_THREAD_INFO_IN_TASK, use bpf_core_field_exists() to provide compatibility for both legacy and future kernels. A struct flavor "task_struct___local" is introduced to bypass static compiler checks when thread_info is missing from the base task_struct. For the newer kernels that select CONFIG_THREAD_INFO_IN_TASK, it reads preempt_count from the thread_info embedded within task_struct. For the older kernels without selecting CONFIG_THREAD_INFO_IN_TASK, it retrieves the thread_info pointer from the bottom of the kernel stack (task->stack) and then reads the preempt_count. This ensures the BPF selftests remain functional across various LoongArch kernel versions. With this patch, "./test_progs -t exe_ctx" passes on LoongArch regardless of whether CONFIG_THREAD_INFO_IN_TASK is set. Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
Make it possible to limit certain tests to loongarch, just like it is already done for x86_64, arm64, riscv64, and s390x. This is a follow up patch of: commit ee7fe84 ("selftests/bpf: __arch_* macro to limit test cases to specific archs") commit 1e4e6b9 ("selftests/bpf: Add __arch_s390x macro") Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
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Upstream branch: b1fcdf9 |
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Pull request for series with
subject: selftests/bpf: Add some tests for LoongArch
version: 1
url: https://patchwork.kernel.org/project/netdevbpf/list/?series=1098735