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(haven.au.ibm.com [9.192.254.114]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ozlabs.au.ibm.com (Postfix) with ESMTPSA id 43CFD602FD; Thu, 14 Dec 2023 16:56:19 +1100 (AEDT) From: Nicholas Miehlbradt To: glider@google.com, elver@google.com, dvyukov@google.com, akpm@linux-foundation.org, mpe@ellerman.id.au, npiggin@gmail.com, christophe.leroy@csgroup.eu Subject: [PATCH 00/13] kmsan: Enable on powerpc Date: Thu, 14 Dec 2023 05:55:26 +0000 Message-Id: <20231214055539.9420-1-nicholas@linux.ibm.com> X-Mailer: git-send-email 2.40.1 X-TM-AS-GCONF: 00 X-Proofpoint-GUID: yQupUEE0NnA-p1u8dDPUOZxgnN7Q8ytt X-Proofpoint-ORIG-GUID: Hrlr57hH7l5Uyw8vyCdTKsVIagZWLZcD Content-Transfer-Encoding: 8bit X-Proofpoint-UnRewURL: 0 URL was un-rewritten MIME-Version: 1.0 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.997,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2023-12-14_02,2023-12-13_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxscore=0 adultscore=0 clxscore=1015 malwarescore=0 bulkscore=0 mlxlogscore=838 priorityscore=1501 suspectscore=0 phishscore=0 lowpriorityscore=0 impostorscore=0 spamscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2311290000 definitions=main-2312140035 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: iii@linux.ibm.com, linux-kernel@vger.kernel.org, Nicholas Miehlbradt , linux-mm@kvack.org, kasan-dev@googlegroups.com, linuxppc-dev@lists.ozlabs.org Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" This series provides the minimal support for Kernal Memory Sanitizer on powerpc pseries le guests. Kernal Memory Sanitizer is a tool which detects uses of uninitialized memory. Currently KMSAN is clang only. The clang support for powerpc has not yet been merged, the pull request can be found here [1]. In addition to this series, there are a number of changes required in generic kmsan code. These changes are already on mailing lists as part of the series implementing KMSAN for s390 [2]. This series is intended to be rebased on top of the s390 series. In addition, I found a bug in the rtc driver used on powerpc. I have sent a fix to this in a seperate series [3]. With this series and the two series mentioned above, I can successfully boot pseries le defconfig without KMSAN warnings. I have not tested other powerpc platforms. [1] https://github.com/llvm/llvm-project/pull/73611 [2] https://lore.kernel.org/linux-mm/20231121220155.1217090-1-iii@linux.ibm.com/ [3] https://lore.kernel.org/linux-rtc/20231129073647.2624497-1-nicholas@linux.ibm.com/ Nicholas Miehlbradt (13): kmsan: Export kmsan_handle_dma hvc: Fix use of uninitialized array in udbg_hvc_putc powerpc: Disable KMSAN santitization for prom_init, vdso and purgatory powerpc: Disable CONFIG_DCACHE_WORD_ACCESS when KMSAN is enabled powerpc: Unpoison buffers populated by hcalls powerpc/pseries/nvram: Unpoison buffer populated by rtas_call powerpc/kprobes: Unpoison instruction in kprobe struct powerpc: Unpoison pt_regs powerpc: Disable KMSAN checks on functions which walk the stack powerpc: Define KMSAN metadata address ranges for vmalloc and ioremap powerpc: Implement architecture specific KMSAN interface powerpc/string: Add KMSAN support powerpc: Enable KMSAN on powerpc arch/powerpc/Kconfig | 3 +- arch/powerpc/include/asm/book3s/64/pgtable.h | 42 +++++++++++++++ arch/powerpc/include/asm/interrupt.h | 2 + arch/powerpc/include/asm/kmsan.h | 51 +++++++++++++++++++ arch/powerpc/include/asm/string.h | 18 ++++++- arch/powerpc/kernel/Makefile | 2 + arch/powerpc/kernel/irq_64.c | 2 + arch/powerpc/kernel/kprobes.c | 2 + arch/powerpc/kernel/module.c | 2 +- arch/powerpc/kernel/process.c | 6 +-- arch/powerpc/kernel/stacktrace.c | 10 ++-- arch/powerpc/kernel/vdso/Makefile | 1 + arch/powerpc/lib/Makefile | 2 + arch/powerpc/lib/mem_64.S | 5 +- arch/powerpc/lib/memcpy_64.S | 2 + arch/powerpc/perf/callchain.c | 2 +- arch/powerpc/platforms/pseries/hvconsole.c | 2 + arch/powerpc/platforms/pseries/nvram.c | 4 ++ arch/powerpc/purgatory/Makefile | 1 + arch/powerpc/sysdev/xive/spapr.c | 3 ++ drivers/tty/hvc/hvc_vio.c | 2 +- mm/kmsan/hooks.c | 1 + .../selftests/powerpc/copyloops/asm/kmsan.h | 0 .../powerpc/copyloops/linux/export.h | 1 + 24 files changed, 152 insertions(+), 14 deletions(-) create mode 100644 arch/powerpc/include/asm/kmsan.h create mode 100644 tools/testing/selftests/powerpc/copyloops/asm/kmsan.h -- 2.40.1