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Tue, 28 May 2024 14:43:34 +0000 Received: from pps.filterd (phxpaimrmta02.imrmtpd1.prodappphxaev1.oraclevcn.com [127.0.0.1]) by phxpaimrmta02.imrmtpd1.prodappphxaev1.oraclevcn.com (8.17.1.19/8.17.1.19) with ESMTP id 44SDud91025822; Tue, 28 May 2024 14:43:33 GMT Received: from pps.reinject (localhost [127.0.0.1]) by phxpaimrmta02.imrmtpd1.prodappphxaev1.oraclevcn.com (PPS) with ESMTPS id 3yc50py1hc-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 28 May 2024 14:43:33 +0000 Received: from phxpaimrmta02.imrmtpd1.prodappphxaev1.oraclevcn.com (phxpaimrmta02.imrmtpd1.prodappphxaev1.oraclevcn.com [127.0.0.1]) by pps.reinject (8.17.1.5/8.17.1.5) with ESMTP id 44SEhW7p035350; Tue, 28 May 2024 14:43:32 GMT Received: from aruramak-dev.osdevelopmeniad.oraclevcn.com (aruramak-dev.allregionaliads.osdevelopmeniad.oraclevcn.com [100.100.253.155]) by phxpaimrmta02.imrmtpd1.prodappphxaev1.oraclevcn.com (PPS) with ESMTP id 3yc50py1g5-1; Tue, 28 May 2024 14:43:32 +0000 From: Aruna Ramakrishna To: linux-kernel@vger.kernel.org Cc: x86@kernel.org, dave.hansen@linux.intel.com, tglx@linutronix.de, mingo@kernel.org, keith.lucas@oracle.com, aruna.ramakrishna@oracle.com Subject: [PATCH v4 0/5] x86/pkeys: update PKRU to enable pkey 0 before Date: Tue, 28 May 2024 14:43:26 +0000 Message-Id: <20240528144331.2758104-1-aruna.ramakrishna@oracle.com> X-Mailer: git-send-email 2.39.3 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1039,Hydra:6.0.650,FMLib:17.12.28.16 definitions=2024-05-28_10,2024-05-28_01,2024-05-17_01 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 mlxscore=0 spamscore=0 suspectscore=0 adultscore=0 phishscore=0 malwarescore=0 mlxlogscore=850 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2405010000 definitions=main-2405280111 X-Proofpoint-ORIG-GUID: dpJjDFvk0tZUvkGSS3B3Fdn_s0Kvkmtt X-Proofpoint-GUID: dpJjDFvk0tZUvkGSS3B3Fdn_s0Kvkmtt v4 updates (based on review feedback from Thomas Gleixner): - Simplified update_pkru_in_sigframe() - Changed sigpkru to enable minimally required keys (init_pkru and current pkru) - Modified pkey_sighandler_tests.c to use kselfttest framework - Fixed commit descriptions - Fixed sigreturn use case (pointed out by Jeff Xu) - Added a new sigreturn test case v3 updates (based on review feedback from Ingo Molnar and Dave Hansen): - Split the original patch into 3: - function interface changes - helper functions - functional change to write pkru on sigframe - Enabled all pkeys before XSAVE - i.e. wrpkru(0), rather than assuming that the alt sig stack is always protected by pkey 0. - Added a few test cases in pkey_sighandler_tests.c. I had some trouble adding these tests to tools/testing/selftests/mm/protection_keys.c, so they're in a separate file. Aruna Ramakrishna (4): x86/pkeys: Add PKRU as a parameter in signal handling functions x86/pkeys: Add helper functions to update PKRU on sigframe x86/pkeys: Update PKRU to enable minimally required pkeys before XSAVE x86/pkeys: Restore altstack before sigcontext Keith Lucas (1): selftests/mm: Add new testcases for pkeys arch/x86/include/asm/fpu/signal.h | 2 +- arch/x86/include/asm/sighandling.h | 10 +- arch/x86/kernel/fpu/signal.c | 27 +- arch/x86/kernel/fpu/xstate.c | 13 + arch/x86/kernel/fpu/xstate.h | 1 + arch/x86/kernel/signal.c | 42 +- arch/x86/kernel/signal_32.c | 12 +- arch/x86/kernel/signal_64.c | 14 +- tools/testing/selftests/mm/Makefile | 5 +- tools/testing/selftests/mm/pkey-helpers.h | 11 +- .../selftests/mm/pkey_sighandler_tests.c | 480 ++++++++++++++++++ tools/testing/selftests/mm/protection_keys.c | 10 - 12 files changed, 582 insertions(+), 45 deletions(-) create mode 100644 tools/testing/selftests/mm/pkey_sighandler_tests.c base-commit: a38297e3fb012ddfa7ce0321a7e5a8daeb1872b6 prerequisite-patch-id: d84439301b44c03df2555d3722ec512001ae52f2 -- 2.39.3