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(unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 341A020043; Thu, 2 Apr 2026 20:40:34 +0000 (GMT) Received: from smtpav03.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 2E10D20040; Thu, 2 Apr 2026 20:40:32 +0000 (GMT) Received: from ltcrain4-lp15.ltc.tadn.ibm.com (unknown [9.5.7.39]) by smtpav03.fra02v.mail.ibm.com (Postfix) with ESMTP; Thu, 2 Apr 2026 20:40:31 +0000 (GMT) From: adubey@linux.ibm.com To: linuxppc-dev@lists.ozlabs.org Cc: hbathini@linux.ibm.com, bpf@vger.kernel.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, Abhishek Dubey Subject: [PATCH v2 5/5] selftest/bpf: Add tailcall verifier selftest for powerpc64 Date: Thu, 2 Apr 2026 20:40:11 -0400 Message-ID: <20260403004011.44417-6-adubey@linux.ibm.com> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20260403004011.44417-1-adubey@linux.ibm.com> References: 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/HvQxe+McvxU6oFiPblYiMD7W0B/SLoGyHuPz5V0CMC2SdoU4jEZQLHFWwkIW9rhildZyY7cLrc mswXbcOLubKMjWR84CSx+6PUsvun9IXv/p0Xgy8nH1d3nwatGusAuF92jP0Xl2pRj68PdyWSrzW /gu4loXa0Q+6+jS8E7g== X-Proofpoint-ORIG-GUID: u3gkjjA-ZqZ8kOVb1U1L23XQQGzZRaOr X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-04-02_03,2026-04-02_05,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 lowpriorityscore=0 priorityscore=1501 suspectscore=0 phishscore=0 adultscore=0 bulkscore=0 impostorscore=0 clxscore=1015 spamscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2603050001 definitions=main-2604020181 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 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 8d60c634a114..17475ecb3207 100644 --- a/tools/testing/selftests/bpf/progs/verifier_tailcall_jit.c +++ b/tools/testing/selftests/bpf/progs/verifier_tailcall_jit.c @@ -90,6 +90,75 @@ __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)") +__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)") +/* tail call prologue for subprogram */ +__jited(" ld 10, 0(1)") +__jited(" ld 9, -8(10)") +__jited(" cmplwi 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(" cmplwi 9, 33") +__jited(" bf {{.*}}, {{.*}}") +__jited(" ld 9, 0(9)") +__jited(" cmplwi 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, 16") +__jited(" mtctr 10") +__jited(" ld 10, -8(1)") +__jited(" cmplwi 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) { -- 2.52.0