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Sun, 7 Jun 2026 16:29:37 +0000 (GMT) Received: from tuxmaker.boeblingen.de.ibm.com (unknown [9.87.85.9]) by smtpav01.fra02v.mail.ibm.com (Postfix) with ESMTP; Sun, 7 Jun 2026 16:29:37 +0000 (GMT) From: Heiko Carstens To: Alexander Gordeev , Sven Schnelle , Vasily Gorbik , Christian Borntraeger , Juergen Christ Cc: linux-s390@vger.kernel.org Subject: [PATCH 1/8] s390/purgatory: Enforce z10 minimum architecture level Date: Sun, 7 Jun 2026 18:29:30 +0200 Message-ID: <20260607162937.2927356-2-hca@linux.ibm.com> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260607162937.2927356-1-hca@linux.ibm.com> References: <20260607162937.2927356-1-hca@linux.ibm.com> Precedence: bulk X-Mailing-List: linux-s390@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Authority-Analysis: v=2.4 cv=N4UZ0W9B c=1 sm=1 tr=0 ts=6a259c76 cx=c_pps a=3Bg1Hr4SwmMryq2xdFQyZA==:117 a=3Bg1Hr4SwmMryq2xdFQyZA==:17 a=FelO9ux0wxsA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=U7nrCbtTmkRpXpFmAIza:22 a=VnNF1IyMAAAA:8 a=foj3guEW7u1rp_cjtnkA:9 X-Proofpoint-ORIG-GUID: q6RBk9QjJOy666ao4axKJ4h5ODEj--cJ X-Proofpoint-GUID: q6RBk9QjJOy666ao4axKJ4h5ODEj--cJ X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNjA3MDE2MCBTYWx0ZWRfXzlVJNznsgD8w 6jdv18sev4QdH6p2dQzeWBbtwSbKAo83BvQGoAQH7dagU7OvarsWr92iBCuRAZfSsTi6Sb5SSYK Y7I+Rsm80MaA8fcOjRTNM7BD0AuLy77p5wUcap8wpSJ+Ce7AzERNispUWKR2YpnTqOaJ22G7zso Qn1XeG1fGQpsO6wNcolMQ8iIa6baqy2OcEbI6Yiw4rjxhk4DK7Sk2QemgnPgoPJQaVxd5hML3tQ WB7+bopDm5VNTxfNQ3vFC9QWSkEiO9pXKJ04+NcLY/Nty5+wjpqXSwiItj89AM2vzRqXvNjshI5 U5OWhJnE7n4ew12pgD+tSg7K9RhPcp8y48W4YSdXS+WJTqdmv8BlefeZmmZ/ZUcFbaZO2Gn4Nx4 UW+QCNwma2BYzZhG6fqJatCLhRpxRkmXGbIsB+ngx4naBGBM/Lw1/tdwvLnxLE9RTb4yWMhtE+l A6j6z5b5hvItwT2VhNw== X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.125,FMLib:17.12.100.49 definitions=2026-06-07_04,2026-06-05_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 bulkscore=0 malwarescore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 phishscore=0 impostorscore=0 adultscore=0 priorityscore=1501 suspectscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2605210000 definitions=main-2606070160 The purgatory code is compiled without the -march option. This means the default architecture level of the compiler is used. This can cause problems, e.g. if instructions used in inline assemblies are for a higher architecture level than the default architecture level of the compiler. Use z10 as minimum architecture level, similar to the boot code, to enforce a defined architecture level set. Signed-off-by: Heiko Carstens --- arch/s390/purgatory/Makefile | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/arch/s390/purgatory/Makefile b/arch/s390/purgatory/Makefile index 95a8ac45b67e..f55764d0c49e 100644 --- a/arch/s390/purgatory/Makefile +++ b/arch/s390/purgatory/Makefile @@ -13,18 +13,20 @@ CFLAGS_sha256.o := -D__NO_FORTIFY $(obj)/mem.o: $(srctree)/arch/s390/lib/mem.S FORCE $(call if_changed_rule,as_o_S) +CC_FLAGS_MARCH_MINIMUM := -march=z10 + KBUILD_CFLAGS := $(CC_FLAGS_DIALECT) -fno-strict-aliasing -Wall -Wstrict-prototypes KBUILD_CFLAGS += -Wno-pointer-sign -Wno-sign-compare KBUILD_CFLAGS += -fno-zero-initialized-in-bss -fno-builtin -ffreestanding KBUILD_CFLAGS += -Os -m64 -msoft-float -fno-common KBUILD_CFLAGS += -fno-stack-protector KBUILD_CFLAGS += -DDISABLE_BRANCH_PROFILING -KBUILD_CFLAGS += -D__DISABLE_EXPORTS +KBUILD_CFLAGS += $(CC_FLAGS_MARCH_MINIMUM) -D__DISABLE_EXPORTS KBUILD_CFLAGS += $(CLANG_FLAGS) KBUILD_CFLAGS += $(call cc-option,-fno-PIE) KBUILD_CFLAGS += $(call cc-option, -Wno-default-const-init-unsafe) KBUILD_AFLAGS := $(filter-out -DCC_USING_EXPOLINE,$(KBUILD_AFLAGS)) -KBUILD_AFLAGS += -D__DISABLE_EXPORTS +KBUILD_AFLAGS += $(CC_FLAGS_MARCH_MINIMUM) -D__DISABLE_EXPORTS # Since we link purgatory with -r unresolved symbols are not checked, so we # also link a purgatory.chk binary without -r to check for unresolved symbols. -- 2.53.0