Messages in this thread | ![/](/images/icornerl.gif) | | From | Aruna Ramakrishna <> | Subject | [PATCH v3 0/4] x86/pkeys: update PKRU to enable pkey 0 before | Date | Thu, 25 Apr 2024 18:05:38 +0000 |
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This version incorporates feedback from Ingo Molnar and Dave Hansen, and adds a few test cases that exercise this flow.
v3 updates: - Split the original patch into 3: - function interface changes - helper functions - functional change to write pkru on sigframe - Enable all pkeys before XSAVE - i.e. wrpkru(0), rather than assuming that the alt sig stack is always protected by pkey 0. - Add 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: Signal handling function interface changes to accept PKRU as a parameter x86/pkeys: Add helper functions to update PKRU on sigframe x86/pkeys: Update PKRU to enable all pkeys before XSAVE selftests/mm: Add new testcases for pkeys
arch/x86/include/asm/fpu/signal.h | 3 +- arch/x86/include/asm/sighandling.h | 10 +- arch/x86/kernel/fpu/signal.c | 45 ++- arch/x86/kernel/fpu/xstate.c | 13 + arch/x86/kernel/fpu/xstate.h | 1 + arch/x86/kernel/signal.c | 33 +- arch/x86/kernel/signal_32.c | 8 +- arch/x86/kernel/signal_64.c | 9 +- tools/testing/selftests/mm/Makefile | 2 + tools/testing/selftests/mm/pkey-helpers.h | 11 +- .../selftests/mm/pkey_sighandler_tests.c | 315 ++++++++++++++++++ tools/testing/selftests/mm/protection_keys.c | 10 - 12 files changed, 422 insertions(+), 38 deletions(-) create mode 100644 tools/testing/selftests/mm/pkey_sighandler_tests.c
-- 2.39.3
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