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18:12:50 +0530 Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v7 6/7] selftest/bpf: Add tailcall verifier selftest for powerpc64 To: adubey@linux.ibm.com, bpf@vger.kernel.org Cc: linuxppc-dev@lists.ozlabs.org, maddy@linux.ibm.com, ast@kernel.org, andrii@kernel.org, daniel@iogearbox.net, shuah@kernel.org, linux-kselftest@vger.kernel.org, stable@vger.kernel.org References: <20260611153826.31187-1-adubey@linux.ibm.com> <20260611153826.31187-7-adubey@linux.ibm.com> Content-Language: en-US From: Hari Bathini In-Reply-To: <20260611153826.31187-7-adubey@linux.ibm.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-TM-AS-GCONF: 00 X-Authority-Analysis: v=2.4 cv=XtnK/1F9 c=1 sm=1 tr=0 ts=6a2d5054 cx=c_pps a=5BHTudwdYE3Te8bg5FgnPg==:117 a=5BHTudwdYE3Te8bg5FgnPg==:17 a=IkcTkHD0fZMA:10 a=FelO9ux0wxsA:10 a=VkNPw1HP01LnGYTKEx00:22 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engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.125,FMLib:17.12.100.49 definitions=2026-06-13_02,2026-06-12_03,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 bulkscore=0 adultscore=0 phishscore=0 lowpriorityscore=0 priorityscore=1501 suspectscore=0 clxscore=1015 malwarescore=0 spamscore=0 impostorscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606040000 definitions=main-2606130125 On 11/06/26 9:08 pm, adubey@linux.ibm.com wrote: > From: Abhishek Dubey > > Verifier testcase result for tailcalls: > > # ./test_progs -t verifier_tailcall > #618/1 verifier_tailcall/invalid map type for tail call:OK > #618/2 verifier_tailcall/invalid map type for tail call @unpriv:OK > #618 verifier_tailcall:OK > #619/1 verifier_tailcall_jit/main:OK > #619 verifier_tailcall_jit:OK > Summary: 2/3 PASSED, 0 SKIPPED, 0 FAILED You may want to put a space or two before each line of the above output to differentiate it as a command output. > > Signed-off-by: Abhishek Dubey > --- > .../bpf/progs/verifier_tailcall_jit.c | 69 +++++++++++++++++++ > 1 file changed, 69 insertions(+) > > diff --git a/tools/testing/selftests/bpf/progs/verifier_tailcall_jit.c b/tools/testing/selftests/bpf/progs/verifier_tailcall_jit.c > index 48fa34d2959f..09d7e92c8491 100644 > --- a/tools/testing/selftests/bpf/progs/verifier_tailcall_jit.c > +++ b/tools/testing/selftests/bpf/progs/verifier_tailcall_jit.c > @@ -91,6 +91,75 @@ __jited(" popq %rax") > __jited(" jmp {{.*}}") /* jump to tail call tgt */ > __jited("L0: leave") > __jited(" {{(retq|jmp 0x)}}") /* return or jump to rethunk */ > +__arch_powerpc64 > +/* program entry for main(), regular function prologue */ > +__jited(" nop") > +__jited("...") /* ld 2, 16(13) absent with CONFIG_PPC_KERNEL_PCREL */ > +__jited(" li 9, 0") > +__jited(" std 9, -8(1)") > +__jited(" mflr 0") > +__jited(" std 0, 16(1)") > +__jited(" stdu 1, {{.*}}(1)") > +/* load address and call sub() via count register */ > +__jited(" lis 12, {{.*}}") > +__jited(" sldi 12, 12, 32") > +__jited(" oris 12, 12, {{.*}}") > +__jited(" ori 12, 12, {{.*}}") > +__jited(" mtctr 12") > +__jited(" bctrl") > +__jited(" mr 8, 3") > +__jited(" li 8, 0") > +__jited(" addi 1, 1, {{.*}}") > +__jited(" ld 0, 16(1)") > +__jited(" mtlr 0") > +__jited(" mr 3, 8") > +__jited(" blr") > +__jited("...") > +__jited("func #1") > +/* subprogram entry for sub() */ > +__jited(" nop") > +__jited("...") /* ld 2, 16(13) absent with CONFIG_PPC_KERNEL_PCREL */ > +/* tail call prologue for subprogram */ > +__jited(" ld 10, 0(1)") > +__jited(" ld 9, -8(10)") > +__jited(" cmpldi 9, 33") > +__jited(" bt {{.*}}, {{.*}}") > +__jited(" addi 9, 10, -8") > +__jited(" std 9, -8(1)") > +__jited(" lis {{.*}}, {{.*}}") > +__jited(" sldi {{.*}}, {{.*}}, 32") > +__jited(" oris {{.*}}, {{.*}}, {{.*}}") > +__jited(" ori {{.*}}, {{.*}}, {{.*}}") > +__jited(" li {{.*}}, 0") > +__jited(" lwz 9, {{.*}}({{.*}})") > +__jited(" slwi {{.*}}, {{.*}}, 0") > +__jited(" cmplw {{.*}}, 9") > +__jited(" bf 0, {{.*}}") > +/* bpf_tail_call implementation */ > +__jited(" ld 9, -8(1)") > +__jited(" cmpldi 9, 33") > +__jited(" bf {{.*}}, {{.*}}") > +__jited(" ld 9, 0(9)") > +__jited(" cmpldi 9, 33") > +__jited(" bt {{.*}}, {{.*}}") > +__jited(" addi 9, 9, 1") > +__jited(" mulli 10, {{.*}}, 8") > +__jited(" add 10, 10, {{.*}}") > +__jited(" ld 10, {{.*}}(10)") > +__jited(" cmpldi 10, 0") > +__jited(" bt {{.*}}, {{.*}}") > +__jited(" ld 10, {{.*}}(10)") > +__jited(" addi 10, 10, {{.*}}") /* offset depends on CONFIG_PPC_KERNEL_PCREL */ > +__jited(" mtctr 10") > +__jited(" ld 10, -8(1)") > +__jited(" cmpldi 10, 33") > +__jited(" bt {{.*}}, {{.*}}") > +__jited(" addi 10, 1, -8") > +__jited(" std 9, 0(10)") > +__jited(" bctr") > +__jited(" mr 3, 8") > +__jited(" blr") > + > SEC("tc") > __naked int main(void) > { - Hari