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Wed, 04 Mar 2026 12:22:12 +0000 Received: from smtpav03.fra02v.mail.ibm.com (smtpav03.fra02v.mail.ibm.com [10.20.54.102]) by smtprelay01.fra02v.mail.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 624CM8FB60883236 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 4 Mar 2026 12:22:08 GMT Received: from smtpav03.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 1135D20043; Wed, 4 Mar 2026 12:22:08 +0000 (GMT) Received: from smtpav03.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id A66EB20040; Wed, 4 Mar 2026 12:22:05 +0000 (GMT) Received: from li-3f69264c-2ce6-11b2-a85c-c3f414d24014.ibm.com.com (unknown [9.39.16.241]) by smtpav03.fra02v.mail.ibm.com (Postfix) with ESMTP; Wed, 4 Mar 2026 12:22:05 +0000 (GMT) From: Sayali Patil To: linuxppc-dev@lists.ozlabs.org, maddy@linux.ibm.com Cc: aboorvad@linux.ibm.com, sshegde@linux.ibm.com, chleroy@kernel.org, riteshh@linux.ibm.com, hbathini@linux.ibm.com, ming.lei@redhat.com, csander@purestorage.com, czhong@redhat.com, venkat88@linux.ibm.com Subject: [PATCH v4 2/2] powerpc/selftests/copyloops: extend selftest to exercise __copy_tofrom_user_power7_vmx Date: Wed, 4 Mar 2026 17:52:01 +0530 Message-ID: <20260304122201.153049-2-sayalip@linux.ibm.com> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20260304122201.153049-1-sayalip@linux.ibm.com> References: <20260304122201.153049-1-sayalip@linux.ibm.com> X-Mailing-List: linuxppc-dev@lists.ozlabs.org List-Id: List-Help: List-Owner: List-Post: List-Archive: , List-Subscribe: , , List-Unsubscribe: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: 4_FpBAFxpE3IqUN8PYnuNw71wVd_FXZ- X-Authority-Analysis: v=2.4 cv=b66/I9Gx c=1 sm=1 tr=0 ts=69a823f4 cx=c_pps a=3Bg1Hr4SwmMryq2xdFQyZA==:117 a=3Bg1Hr4SwmMryq2xdFQyZA==:17 a=Yq5XynenixoA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=V8glGbnc2Ofi9Qvn3v5h:22 a=VwQbUJbxAAAA:8 a=VnNF1IyMAAAA:8 a=gZzq1o9Dtywjk6PVXYUA:9 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwMzA0MDA5NiBTYWx0ZWRfX+wwrCpK5iqbU VlPAgGPNbliKYBPfc0WYO6dMr/BXV5X8USEjheUgAaPRHQ09ADDsOHBs06d8XGspR1RGzWSR3cu mYXt1jgZL5O863C5Oh/VWjqciGJagREZnniFDy1zciPdjnYo6oyZUHwnxlnlqMXcLu3Bx6T+scv tqppMl826gwg0rt/R0SitgAJQ4o3xfs3GPeztHLd5Zg/gMpOodjBJkB+oIJ9CBXhBIEm3imHlJb tOHXz5BizEGd30Ii5lcSnWr9JHVXWuYK3FGPNLYKPDDaZdrH4zcMxwFX0Dcga86PA02psQ9kTCJ m1Wcmxzx1H4+2mdb2PL1gADWY9M+q7QsCMgRe/+ca0vCaL+HZrIxnvV/ido4O9YGOXpOAnaOJfG ot+M+sN317I5WtM+gEEY52Mt9wkcVdGQbe4Gzk4zxzaCA/Ty1eh8pi2x3MBh19BxdFN4h1fGtK3 H3JZ6EAOGXp8mk9lf0g== X-Proofpoint-GUID: 4_FpBAFxpE3IqUN8PYnuNw71wVd_FXZ- 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=2026-03-04_05,2026-03-03_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 suspectscore=0 lowpriorityscore=0 phishscore=0 clxscore=1015 adultscore=0 bulkscore=0 impostorscore=0 malwarescore=0 spamscore=0 priorityscore=1501 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2602130000 definitions=main-2603040096 The new PowerPC VMX fast path (__copy_tofrom_user_power7_vmx) is not exercised by existing copyloops selftests. This patch updates the selftest to exercise the VMX variant, ensuring the VMX copy path is validated. Changes include: - COPY_LOOP=test___copy_tofrom_user_power7_vmx with -D VMX_TEST is used in existing selftest build targets. - Inclusion of ../utils.c to provide get_auxv_entry() for hardware feature detection. - At runtime, the test skips execution if Altivec is not available. - Copy sizes above VMX_COPY_THRESHOLD are used to ensure the VMX path is taken. This enables validation of the VMX fast path without affecting systems that do not support Altivec. Signed-off-by: Sayali Patil --- v3->v4 No changes in the patch. v3: https://lore.kernel.org/all/20260304053506.118632-2-sayalip@linux.ibm.com/ --- .../selftests/powerpc/copyloops/.gitignore | 4 ++-- .../testing/selftests/powerpc/copyloops/Makefile | 11 ++++++++--- tools/testing/selftests/powerpc/copyloops/stubs.S | 8 -------- .../selftests/powerpc/copyloops/validate.c | 15 ++++++++++++++- 4 files changed, 24 insertions(+), 14 deletions(-) diff --git a/tools/testing/selftests/powerpc/copyloops/.gitignore b/tools/testing/selftests/powerpc/copyloops/.gitignore index 7283e8b07b75..80d4270a71ac 100644 --- a/tools/testing/selftests/powerpc/copyloops/.gitignore +++ b/tools/testing/selftests/powerpc/copyloops/.gitignore @@ -2,8 +2,8 @@ copyuser_64_t0 copyuser_64_t1 copyuser_64_t2 -copyuser_p7_t0 -copyuser_p7_t1 +copyuser_p7 +copyuser_p7_vmx memcpy_64_t0 memcpy_64_t1 memcpy_64_t2 diff --git a/tools/testing/selftests/powerpc/copyloops/Makefile b/tools/testing/selftests/powerpc/copyloops/Makefile index 42940f92d832..0c8efb0bddeb 100644 --- a/tools/testing/selftests/powerpc/copyloops/Makefile +++ b/tools/testing/selftests/powerpc/copyloops/Makefile @@ -1,6 +1,6 @@ # SPDX-License-Identifier: GPL-2.0 TEST_GEN_PROGS := copyuser_64_t0 copyuser_64_t1 copyuser_64_t2 \ - copyuser_p7_t0 copyuser_p7_t1 \ + copyuser_p7 copyuser_p7_vmx \ memcpy_64_t0 memcpy_64_t1 memcpy_64_t2 \ memcpy_p7_t0 memcpy_p7_t1 copy_mc_64 \ copyuser_64_exc_t0 copyuser_64_exc_t1 copyuser_64_exc_t2 \ @@ -28,10 +28,15 @@ $(OUTPUT)/copyuser_64_t%: copyuser_64.S $(EXTRA_SOURCES) -D SELFTEST_CASE=$(subst copyuser_64_t,,$(notdir $@)) \ -o $@ $^ -$(OUTPUT)/copyuser_p7_t%: copyuser_power7.S $(EXTRA_SOURCES) +$(OUTPUT)/copyuser_p7: copyuser_power7.S $(EXTRA_SOURCES) $(CC) $(CPPFLAGS) $(CFLAGS) \ -D COPY_LOOP=test___copy_tofrom_user_power7 \ - -D SELFTEST_CASE=$(subst copyuser_p7_t,,$(notdir $@)) \ + -o $@ $^ + +$(OUTPUT)/copyuser_p7_vmx: copyuser_power7.S $(EXTRA_SOURCES) ../utils.c + $(CC) $(CPPFLAGS) $(CFLAGS) \ + -D COPY_LOOP=test___copy_tofrom_user_power7_vmx \ + -D VMX_TEST \ -o $@ $^ # Strictly speaking, we only need the memcpy_64 test cases for big-endian diff --git a/tools/testing/selftests/powerpc/copyloops/stubs.S b/tools/testing/selftests/powerpc/copyloops/stubs.S index ec8bcf2bf1c2..3a9cb8c9a3ee 100644 --- a/tools/testing/selftests/powerpc/copyloops/stubs.S +++ b/tools/testing/selftests/powerpc/copyloops/stubs.S @@ -1,13 +1,5 @@ #include -FUNC_START(enter_vmx_usercopy) - li r3,1 - blr - -FUNC_START(exit_vmx_usercopy) - li r3,0 - blr - FUNC_START(enter_vmx_ops) li r3,1 blr diff --git a/tools/testing/selftests/powerpc/copyloops/validate.c b/tools/testing/selftests/powerpc/copyloops/validate.c index 0f6873618552..fb822534fbe9 100644 --- a/tools/testing/selftests/powerpc/copyloops/validate.c +++ b/tools/testing/selftests/powerpc/copyloops/validate.c @@ -12,6 +12,10 @@ #define BUFLEN (MAX_LEN+MAX_OFFSET+2*MIN_REDZONE) #define POISON 0xa5 +#ifdef VMX_TEST +#define VMX_COPY_THRESHOLD 3328 +#endif + unsigned long COPY_LOOP(void *to, const void *from, unsigned long size); static void do_one(char *src, char *dst, unsigned long src_off, @@ -81,8 +85,12 @@ int test_copy_loop(void) /* Fill with sequential bytes */ for (i = 0; i < BUFLEN; i++) fill[i] = i & 0xff; - +#ifdef VMX_TEST + /* Force sizes above kernel VMX threshold (3328) */ + for (len = VMX_COPY_THRESHOLD + 1; len < MAX_LEN; len++) { +#else for (len = 1; len < MAX_LEN; len++) { +#endif for (src_off = 0; src_off < MAX_OFFSET; src_off++) { for (dst_off = 0; dst_off < MAX_OFFSET; dst_off++) { do_one(src, dst, src_off, dst_off, len, @@ -96,5 +104,10 @@ int test_copy_loop(void) int main(void) { +#ifdef VMX_TEST + /* Skip if Altivec not present */ + SKIP_IF_MSG(!have_hwcap(PPC_FEATURE_HAS_ALTIVEC), "ALTIVEC not supported"); +#endif + return test_harness(test_copy_loop, str(COPY_LOOP)); } -- 2.52.0