On Fri, May 03, 2024 at 02:01:18PM +0100, Joey Gouly wrote: > Hi all, > > This series implements the Permission Overlay Extension introduced in 2022 > VMSA enhancements [1]. It is based on v6.9-rc5. > > One possible issue with this version, I took the last bit of HWCAP2. > > Changes since v3[2]: > - Moved Kconfig to nearer the end of the series > - Reworked MMU Fault path, to check for POE faults earlier, under the mm lock > - Rework VM_FLAGS to use Kconfig option > - Don't check POR_EL0 in MTE sync tags function > - Reworked KVM to fit into VNCR/VM configuration changes > - Use new AT instruction in KVM > - Rebase onto v6.9-rc5 > > The Permission Overlay Extension allows to constrain permissions on memory > regions. This can be used from userspace (EL0) without a system call or TLB > invalidation. > > POE is used to implement the Memory Protection Keys [3] Linux syscall. > > The first few patches add the basic framework, then the PKEYS interface is > implemented, and then the selftests are made to work on arm64. > > I have tested the modified protection_keys test on x86_64, but not PPC. > I haven't build tested the x86/ppc arch changes. > > Thanks, > Joey I found a silly off by one error, so I will be sending a v5 at some point. > > Joey Gouly (29): > powerpc/mm: add ARCH_PKEY_BITS to Kconfig > x86/mm: add ARCH_PKEY_BITS to Kconfig > mm: use ARCH_PKEY_BITS to define VM_PKEY_BITN > arm64: disable trapping of POR_EL0 to EL2 > arm64: cpufeature: add Permission Overlay Extension cpucap > arm64: context switch POR_EL0 register > KVM: arm64: Save/restore POE registers > KVM: arm64: make kvm_at() take an OP_AT_* > KVM: arm64: use `at s1e1a` for POE > arm64: enable the Permission Overlay Extension for EL0 > arm64: re-order MTE VM_ flags > arm64: add POIndex defines > arm64: convert protection key into vm_flags and pgprot values > arm64: mask out POIndex when modifying a PTE > arm64: handle PKEY/POE faults > arm64: add pte_access_permitted_no_overlay() > arm64: implement PKEYS support > arm64: add POE signal support > arm64: enable PKEY support for CPUs with S1POE > arm64: enable POE and PIE to coexist > arm64/ptrace: add support for FEAT_POE > arm64: add Permission Overlay Extension Kconfig > kselftest/arm64: move get_header() > selftests: mm: move fpregs printing > selftests: mm: make protection_keys test work on arm64 > kselftest/arm64: add HWCAP test for FEAT_S1POE > kselftest/arm64: parse POE_MAGIC in a signal frame > kselftest/arm64: Add test case for POR_EL0 signal frame records > KVM: selftests: get-reg-list: add Permission Overlay registers > > Documentation/arch/arm64/elf_hwcaps.rst | 2 + > arch/arm64/Kconfig | 22 +++ > arch/arm64/include/asm/cpufeature.h | 6 + > arch/arm64/include/asm/el2_setup.h | 10 +- > arch/arm64/include/asm/hwcap.h | 1 + > arch/arm64/include/asm/kvm_asm.h | 3 +- > arch/arm64/include/asm/kvm_host.h | 4 + > arch/arm64/include/asm/mman.h | 8 +- > arch/arm64/include/asm/mmu.h | 1 + > arch/arm64/include/asm/mmu_context.h | 51 ++++++- > arch/arm64/include/asm/pgtable-hwdef.h | 10 ++ > arch/arm64/include/asm/pgtable-prot.h | 8 +- > arch/arm64/include/asm/pgtable.h | 34 ++++- > arch/arm64/include/asm/pkeys.h | 110 ++++++++++++++ > arch/arm64/include/asm/por.h | 33 +++++ > arch/arm64/include/asm/processor.h | 1 + > arch/arm64/include/asm/sysreg.h | 3 + > arch/arm64/include/asm/traps.h | 1 + > arch/arm64/include/asm/vncr_mapping.h | 1 + > arch/arm64/include/uapi/asm/hwcap.h | 1 + > arch/arm64/include/uapi/asm/sigcontext.h | 7 + > arch/arm64/kernel/cpufeature.c | 23 +++ > arch/arm64/kernel/cpuinfo.c | 1 + > arch/arm64/kernel/process.c | 28 ++++ > arch/arm64/kernel/ptrace.c | 46 ++++++ > arch/arm64/kernel/signal.c | 52 +++++++ > arch/arm64/kernel/traps.c | 12 +- > arch/arm64/kvm/hyp/include/hyp/fault.h | 5 +- > arch/arm64/kvm/hyp/include/hyp/sysreg-sr.h | 29 ++++ > arch/arm64/kvm/sys_regs.c | 8 +- > arch/arm64/mm/fault.c | 56 ++++++- > arch/arm64/mm/mmap.c | 9 ++ > arch/arm64/mm/mmu.c | 40 +++++ > arch/arm64/tools/cpucaps | 1 + > arch/powerpc/Kconfig | 4 + > arch/x86/Kconfig | 4 + > fs/proc/task_mmu.c | 2 + > include/linux/mm.h | 20 ++- > include/uapi/linux/elf.h | 1 + > tools/testing/selftests/arm64/abi/hwcap.c | 14 ++ > .../testing/selftests/arm64/signal/.gitignore | 1 + > .../arm64/signal/testcases/poe_siginfo.c | 86 +++++++++++ > .../arm64/signal/testcases/testcases.c | 27 +--- > .../arm64/signal/testcases/testcases.h | 28 +++- > .../selftests/kvm/aarch64/get-reg-list.c | 14 ++ > tools/testing/selftests/mm/Makefile | 2 +- > tools/testing/selftests/mm/pkey-arm64.h | 139 ++++++++++++++++++ > tools/testing/selftests/mm/pkey-helpers.h | 8 + > tools/testing/selftests/mm/pkey-powerpc.h | 3 + > tools/testing/selftests/mm/pkey-x86.h | 4 + > tools/testing/selftests/mm/protection_keys.c | 109 ++++++++++++-- > 51 files changed, 1027 insertions(+), 66 deletions(-) > create mode 100644 arch/arm64/include/asm/pkeys.h > create mode 100644 arch/arm64/include/asm/por.h > create mode 100644 tools/testing/selftests/arm64/signal/testcases/poe_siginfo.c > create mode 100644 tools/testing/selftests/mm/pkey-arm64.h > > -- > 2.25.1 > > > _______________________________________________ > linux-arm-kernel mailing list > linux-arm-kernel@xxxxxxxxxxxxxxxxxxx > http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
