[PATCH RESEND bpf-next 1/1] powerpc64/bpf: Add jit support for load_acquire and store_release

[Madhavan Srinivasan]

On 7/27/25 10:59 PM, Daniel Borkmann wrote:
> On 7/24/25 12:27 PM, Saket Kumar Bhaskar wrote:
> [...]
>> Thanks for the patch. I applied the patch and tested it.
>>
>> Before this patch:
>>
>> # ./test_progs -a \
>>    verifier_load_acquire,verifier_store_release,atomics
>> #11/1    atomics/add:OK
>> #11/2    atomics/sub:OK
>> #11/3    atomics/and:OK
>> #11/4    atomics/or:OK
>> #11/5    atomics/xor:OK
>> #11/6    atomics/cmpxchg:OK
>> #11/7    atomics/xchg:OK
>> #11      atomics:OK
>> #528/1   verifier_load_acquire/Clang version < 18, ENABLE_ATOMICS_TESTS not defined, and/or JIT doesn't support load-acquire, use a dummy test:OK
>> #528     verifier_load_acquire:OK
>> #565/1   verifier_store_release/Clang version < 18, ENABLE_ATOMICS_TESTS not defined, and/or JIT doesn't support store-release, use a dummy test:OK
>> #565     verifier_store_release:OK
>> Summary: 3/9 PASSED, 0 SKIPPED, 0 FAILED
>>
>> After this patch:
>>
>> # ./test_progs -a \
>>    verifier_load_acquire,verifier_store_release,atomics
>> #11/1    atomics/add:OK
>> #11/2    atomics/sub:OK
>> #11/3    atomics/and:OK
>> #11/4    atomics/or:OK
>> #11/5    atomics/xor:OK
>> #11/6    atomics/cmpxchg:OK
>> #11/7    atomics/xchg:OK
>> #11      atomics:OK
>> #529/1   verifier_load_acquire/load-acquire, 8-bit:OK
>> #529/2   verifier_load_acquire/load-acquire, 8-bit @unpriv:OK
>> #529/3   verifier_load_acquire/load-acquire, 16-bit:OK
>> #529/4   verifier_load_acquire/load-acquire, 16-bit @unpriv:OK
>> #529/5   verifier_load_acquire/load-acquire, 32-bit:OK
>> #529/6   verifier_load_acquire/load-acquire, 32-bit @unpriv:OK
>> #529/7   verifier_load_acquire/load-acquire, 64-bit:OK
>> #529/8   verifier_load_acquire/load-acquire, 64-bit @unpriv:OK
>> #529/9   verifier_load_acquire/load-acquire with uninitialized src_reg:OK
>> #529/10  verifier_load_acquire/load-acquire with uninitialized src_reg @unpriv:OK
>> #529/11  verifier_load_acquire/load-acquire with non-pointer src_reg:OK
>> #529/12  verifier_load_acquire/load-acquire with non-pointer src_reg @unpriv:OK
>> #529/13  verifier_load_acquire/misaligned load-acquire:OK
>> #529/14  verifier_load_acquire/misaligned load-acquire @unpriv:OK
>> #529/15  verifier_load_acquire/load-acquire from ctx pointer:OK
>> #529/16  verifier_load_acquire/load-acquire from ctx pointer @unpriv:OK
>> #529/17  verifier_load_acquire/load-acquire with invalid register R15:OK
>> #529/18  verifier_load_acquire/load-acquire with invalid register R15 @unpriv:OK
>> #529/19  verifier_load_acquire/load-acquire from pkt pointer:OK
>> #529/20  verifier_load_acquire/load-acquire from flow_keys pointer:OK
>> #529/21  verifier_load_acquire/load-acquire from sock pointer:OK
>> #529     verifier_load_acquire:OK
>> #566/1   verifier_store_release/store-release, 8-bit:OK
>> #566/2   verifier_store_release/store-release, 8-bit @unpriv:OK
>> #566/3   verifier_store_release/store-release, 16-bit:OK
>> #566/4   verifier_store_release/store-release, 16-bit @unpriv:OK
>> #566/5   verifier_store_release/store-release, 32-bit:OK
>> #566/6   verifier_store_release/store-release, 32-bit @unpriv:OK
>> #566/7   verifier_store_release/store-release, 64-bit:OK
>> #566/8   verifier_store_release/store-release, 64-bit @unpriv:OK
>> #566/9   verifier_store_release/store-release with uninitialized src_reg:OK
>> #566/10  verifier_store_release/store-release with uninitialized src_reg @unpriv:OK
>> #566/11  verifier_store_release/store-release with uninitialized dst_reg:OK
>> #566/12  verifier_store_release/store-release with uninitialized dst_reg @unpriv:OK
>> #566/13  verifier_store_release/store-release with non-pointer dst_reg:OK
>> #566/14  verifier_store_release/store-release with non-pointer dst_reg @unpriv:OK
>> #566/15  verifier_store_release/misaligned store-release:OK
>> #566/16  verifier_store_release/misaligned store-release @unpriv:OK
>> #566/17  verifier_store_release/store-release to ctx pointer:OK
>> #566/18  verifier_store_release/store-release to ctx pointer @unpriv:OK
>> #566/19  verifier_store_release/store-release, leak pointer to stack:OK
>> #566/20  verifier_store_release/store-release, leak pointer to stack @unpriv:OK
>> #566/21  verifier_store_release/store-release, leak pointer to map:OK
>> #566/22  verifier_store_release/store-release, leak pointer to map @unpriv:OK
>> #566/23  verifier_store_release/store-release with invalid register R15:OK
>> #566/24  verifier_store_release/store-release with invalid register R15 @unpriv:OK
>> #566/25  verifier_store_release/store-release to pkt pointer:OK
>> #566/26  verifier_store_release/store-release to flow_keys pointer:OK
>> #566/27  verifier_store_release/store-release to sock pointer:OK
>> #566     verifier_store_release:OK
>> Summary: 3/55 PASSED, 0 SKIPPED, 0 FAILED
>>
>> Tested-by: Saket Kumar Bhaskar <skb99 at linux.ibm.com>
> 
> Michael/Madhavan, I presume you'll pick this patch up?
> 

yes, Will do.

Thanks
Maddy

> Thanks,
> Daniel