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Tiezhu Yang e2f7b3d8b4 LoongArch: BPF: Fix unconditional bswap instructions 
We can see that "bswap32: Takes an unsigned 32-bit number in either big-
or little-endian format and returns the equivalent number with the same
bit width but opposite endianness" in BPF Instruction Set Specification,
so it should clear the upper 32 bits in "case 32:" for both BPF_ALU and
BPF_ALU64.

[root@linux fedora]# echo 1 > /proc/sys/net/core/bpf_jit_enable
[root@linux fedora]# modprobe test_bpf

Before:
test_bpf: #313 BSWAP 32: 0x0123456789abcdef -> 0xefcdab89 jited:1 ret 1460850314 != -271733879 (0x5712ce8a != 0xefcdab89)FAIL (1 times)
test_bpf: #317 BSWAP 32: 0xfedcba9876543210 -> 0x10325476 jited:1 ret -1460850316 != 271733878 (0xa8ed3174 != 0x10325476)FAIL (1 times)

After:
test_bpf: #313 BSWAP 32: 0x0123456789abcdef -> 0xefcdab89 jited:1 4 PASS
test_bpf: #317 BSWAP 32: 0xfedcba9876543210 -> 0x10325476 jited:1 4 PASS

Fixes: 4ebf9216e7 ("LoongArch: BPF: Support unconditional bswap instructions")
Acked-by: Hengqi Chen <hengqi.chen@gmail.com>
Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
2023-12-09 15:49:16 +08:00
..
alpha TTY/Serial changes for 6.7-rc1 2023-11-03 15:44:25 -10:00
arc kprobes: unify kprobes_exceptions_nofify() prototypes 2023-11-10 19:59:05 +09:00
arm arm/xen: fix xen_vcpu_info allocation alignment 2023-11-23 09:32:41 +01:00
arm64 arm64: Avoid enabling KPTI unnecessarily 2023-11-30 19:07:33 +00:00
csky Kbuild updates for v6.7 2023-11-04 08:07:19 -10:00
hexagon TTY/Serial changes for 6.7-rc1 2023-11-03 15:44:25 -10:00
loongarch LoongArch: BPF: Fix unconditional bswap instructions 2023-12-09 15:49:16 +08:00
m68k Many singleton patches against the MM code. The patch series which are 2023-11-02 19:38:47 -10:00
microblaze asm-generic updates for v6.7 2023-11-01 15:28:33 -10:00
mips Probes fixes for v6.7-rc1: 2023-11-10 16:35:04 -08:00
nios2
openrisc
parisc parisc: Reduce size of the bug_table on 64-bit kernel by half 2023-11-25 09:43:18 +01:00
powerpc KVM: PPC: Book3S HV: Fix KVM_RUN clobbering FP/VEC user registers 2023-11-29 22:24:21 +11:00
riscv RISC-V Patches for the 6.7 Merge Window, Part 2 2023-11-10 09:23:17 -08:00
s390 s390: remove odd comment 2023-11-22 13:55:13 +01:00
sh kprobes: unify kprobes_exceptions_nofify() prototypes 2023-11-10 19:59:05 +09:00
sparc kprobes: unify kprobes_exceptions_nofify() prototypes 2023-11-10 19:59:05 +09:00
um
x86 xen: branch for v6.7-rc4 2023-12-03 08:31:53 +09:00
xtensa TTY/Serial changes for 6.7-rc1 2023-11-03 15:44:25 -10:00
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