This is a note to let you know that I've just added the patch titled
LoongArch: BPF: Enable bpf_probe_read{, str}() on LoongArch
to the 6.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
loongarch-bpf-enable-bpf_probe_read-str-on-loongarch.patch
and it can be found in the queue-6.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From de0e30bee86d0f99c696a1fea34474e556a946ec Mon Sep 17 00:00:00 2001
From: Chenguang Zhao <zhaochenguang@xxxxxxxxxx>
Date: Fri, 28 Jul 2023 10:30:42 +0800
Subject: LoongArch: BPF: Enable bpf_probe_read{, str}() on LoongArch
From: Chenguang Zhao <zhaochenguang@xxxxxxxxxx>
commit de0e30bee86d0f99c696a1fea34474e556a946ec upstream.
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@xxxxxxxxxxxxxxx # 6.1
Signed-off-by: Chenguang Zhao <zhaochenguang@xxxxxxxxxx>
Signed-off-by: Huacai Chen <chenhuacai@xxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/loongarch/Kconfig | 1 +
1 file changed, 1 insertion(+)
--- a/arch/loongarch/Kconfig
+++ b/arch/loongarch/Kconfig
@@ -12,6 +12,7 @@ config LOONGARCH
select ARCH_HAS_ACPI_TABLE_UPGRADE if ACPI
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
Patches currently in stable-queue which might be from zhaochenguang@xxxxxxxxxx are
queue-6.4/loongarch-bpf-enable-bpf_probe_read-str-on-loongarch.patch
