LoongArch: BPF: Enable bpf_probe_read{, str}() on LoongArch

Currently nettrace does not work on LoongArch due to missing
bpf_probe_read{,str}() support, with the error message:

     ERROR: failed to load kprobe-based eBPF
     ERROR: failed to load kprobe-based bpf

According to commit 0ebeea8ca8a4d1d ("bpf: Restrict bpf_probe_read{,
str}() only to archs where they work"), we only need to select
CONFIG_ARCH_HAS_NON_OVERLAPPING_ADDRESS_SPACE to add said support,
because LoongArch does have non-overlapping address ranges for kernel
and userspace.

Cc: stable@vger.kernel.org # 6.1
Signed-off-by: Chenguang Zhao <zhaochenguang@kylinos.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>

diff --git a/arch/loongarch/Kconfig b/arch/loongarch/Kconfig
index e55511a..e71d5bf 100644 (file)
--- a/arch/loongarch/Kconfig
+++ b/arch/loongarch/Kconfig
@@ -14,6 +14,7 @@ config LOONGARCH
        select ARCH_HAS_CPU_FINALIZE_INIT
        select ARCH_HAS_FORTIFY_SOURCE
        select ARCH_HAS_NMI_SAFE_THIS_CPU_OPS
+       select ARCH_HAS_NON_OVERLAPPING_ADDRESS_SPACE
        select ARCH_HAS_PTE_SPECIAL
        select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST
        select ARCH_INLINE_READ_LOCK if !PREEMPTION