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Fri, 19 May 2023 05:02:48 +0000 (GMT) Received: from smtpav07.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 8706A20040; Fri, 19 May 2023 05:02:47 +0000 (GMT) Received: from ozlabs.au.ibm.com (unknown [9.192.253.14]) by smtpav07.fra02v.mail.ibm.com (Postfix) with ESMTP; Fri, 19 May 2023 05:02:47 +0000 (GMT) Received: from bgray-lenovo-p15.ozlabs.ibm.com (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 52DFC6013C; Fri, 19 May 2023 15:02:45 +1000 (AEST) From: Benjamin Gray To: linuxppc-dev@lists.ozlabs.org Subject: [PATCH v3 00/12] Add static DEXCR support Date: Fri, 19 May 2023 15:02:24 +1000 Message-Id: <20230519050236.144847-1-bgray@linux.ibm.com> X-Mailer: git-send-email 2.40.1 X-TM-AS-GCONF: 00 X-Proofpoint-GUID: VNXo5b6ZybXRMD8K543vf2cDra7D3KQo X-Proofpoint-ORIG-GUID: MEvF8V39ts4Or0EhkGcPzikC2nXB7YAM X-Proofpoint-UnRewURL: 0 URL was un-rewritten MIME-Version: 1.0 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.254,Aquarius:18.0.957,Hydra:6.0.573,FMLib:17.11.170.22 definitions=2023-05-19_02,2023-05-17_02,2023-02-09_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 phishscore=0 adultscore=0 spamscore=0 mlxscore=0 mlxlogscore=999 priorityscore=1501 bulkscore=0 lowpriorityscore=0 impostorscore=0 clxscore=1011 suspectscore=0 malwarescore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2304280000 definitions=main-2305190038 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: Benjamin Gray , ajd@linux.ibm.com, npiggin@gmail.com, ruscur@russell.cc Errors-To: linuxppc-dev-bounces+incoming=patchwork.ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" The DEXCR is a SPR that allows control over various execution 'aspects', such as indirect branch prediction and enabling the hashst/hashchk instructions. Further details are in ISA 3.1B Book 3 chapter 9. This series adds static (compile time) support for initialising the DEXCR, and basic HASHKEYR bookkeeping. v3: * Address Russell's comments v2: * Add ptrace/coredump support Previous versions: v2: https://lore.kernel.org/all/20230330055040.434133-1-bgray@linux.ibm.com/ v1: https://lore.kernel.org/all/20230322054612.1340573-1-bgray@linux.ibm.com/ RFC: https://lore.kernel.org/all/20221128024458.46121-1-bgray@linux.ibm.com/ Benjamin Gray (12): powerpc/book3s: Add missing include powerpc/ptrace: Add missing include powerpc/dexcr: Add initial Dynamic Execution Control Register (DEXCR) support powerpc/dexcr: Handle hashchk exception powerpc/dexcr: Support userspace ROP protection powerpc/dexcr: Support custom default DEXCR value powerpc/ptrace: Expose DEXCR and HDEXCR registers to ptrace powerpc/ptrace: Expose HASHKEYR register to ptrace Documentation: Document PowerPC kernel DEXCR interface selftests/powerpc: Add more utility macros selftests/powerpc/dexcr: Add hashst/hashchk test selftests/powerpc/dexcr: Add DEXCR status utility lsdexcr Documentation/powerpc/dexcr.rst | 58 +++++ Documentation/powerpc/index.rst | 1 + arch/powerpc/Kconfig | 14 ++ arch/powerpc/include/asm/book3s/64/kexec.h | 5 + arch/powerpc/include/asm/book3s/64/kup.h | 1 + arch/powerpc/include/asm/cputable.h | 4 +- arch/powerpc/include/asm/ppc-opcode.h | 1 + arch/powerpc/include/asm/processor.h | 1 + arch/powerpc/include/asm/reg.h | 10 + arch/powerpc/include/uapi/asm/elf.h | 2 + arch/powerpc/kernel/cpu_setup_power.c | 9 + arch/powerpc/kernel/process.c | 17 ++ arch/powerpc/kernel/prom.c | 1 + arch/powerpc/kernel/ptrace/ptrace-decl.h | 6 + arch/powerpc/kernel/ptrace/ptrace-view.c | 67 +++++- arch/powerpc/kernel/traps.c | 16 ++ include/uapi/linux/elf.h | 2 + tools/testing/selftests/powerpc/Makefile | 1 + .../selftests/powerpc/dexcr/.gitignore | 2 + .../testing/selftests/powerpc/dexcr/Makefile | 9 + tools/testing/selftests/powerpc/dexcr/dexcr.c | 132 ++++++++++ tools/testing/selftests/powerpc/dexcr/dexcr.h | 49 ++++ .../selftests/powerpc/dexcr/hashchk_test.c | 227 ++++++++++++++++++ .../testing/selftests/powerpc/dexcr/lsdexcr.c | 141 +++++++++++ tools/testing/selftests/powerpc/include/reg.h | 4 + .../testing/selftests/powerpc/include/utils.h | 31 ++- .../powerpc/pmu/sampling_tests/misc.h | 2 - tools/testing/selftests/powerpc/utils.c | 24 ++ 28 files changed, 832 insertions(+), 5 deletions(-) create mode 100644 Documentation/powerpc/dexcr.rst create mode 100644 tools/testing/selftests/powerpc/dexcr/.gitignore create mode 100644 tools/testing/selftests/powerpc/dexcr/Makefile create mode 100644 tools/testing/selftests/powerpc/dexcr/dexcr.c create mode 100644 tools/testing/selftests/powerpc/dexcr/dexcr.h create mode 100644 tools/testing/selftests/powerpc/dexcr/hashchk_test.c create mode 100644 tools/testing/selftests/powerpc/dexcr/lsdexcr.c base-commit: 547124f858ea52b2f7e58e8c0d39170a9fa66b4b --- 2.40.1