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Commits on Dec 9, 2020

• membarrier: Execute SYNC_CORE on the calling thread

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• membarrier: Explicitly sync remote cores when SYNC_CORE is requested

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• membarrier: Add an actual barrier before rseq_preempt()

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• x86/membarrier: Get rid of a dubious optimization

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Commits on Nov 24, 2020

• selftests/x86: Add missing .note.GNU-stack sections

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• selftests/x86/fsgsbase: Fix GS == 1, 2, and 3 tests

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Commits on Oct 14, 2020

• x86/syscalls: Document the fact that syscalls 512-547 are a legacy mistake

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Commits on Sep 4, 2020

• x86/debug: Allow a single level of #DB recursion

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• selftests/x86/test_vsyscall: Improve the process_vm_readv() test

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Commits on Aug 26, 2020

• selftests/x86/fsgsbase: Test PTRACE_PEEKUSER for GSBASE with invalid LDT GS

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• selftests/x86/fsgsbase: Reap a forgotten child

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Commits on Jul 18, 2020

• x86/ioperm: Fix io bitmap invalidation on Xen PV

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Commits on Jul 6, 2020

• x86/entry: Rename idtentry_enter/exit_cond_rcu() to idtentry_enter/exit()

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Commits on Jul 4, 2020

• x86/ldt: Disable 16-bit segments on Xen PV

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• x86/entry/32: Fix #MC and #DB wiring on x86_32

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• x86/entry/xen: Route #DB correctly on Xen PV

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• x86/entry, selftests: Further improve user entry sanity checks

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• x86/entry/compat: Clear RAX high bits on Xen PV SYSENTER

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Commits on Jul 1, 2020

• x86/fsgsbase: Fix Xen PV support

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• x86/ptrace: Fix 32-bit PTRACE_SETREGS vs fsbase and gsbase

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• selftests/x86/fsgsbase: Add a missing memory constraint

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• selftests/x86/fsgsbase: Fix a comment in the ptrace_write_gsbase test

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• selftests/x86: Consolidate and fix get/set_eflags() helpers

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• selftests/x86/syscall_nt: Clear weird flags after each test

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• selftests/x86/syscall_nt: Add more flag combinations

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• x86/entry/64/compat: Fix Xen PV SYSENTER frame setup

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• x86/entry: Move SYSENTER's regs->sp and regs->flags fixups into C

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• x86/entry: Assert that syscalls are on the right stack

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Commits on Jun 22, 2020

• selftests/x86: Add a syscall_arg_fault_64 test for negative GSBASE

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Commits on Jun 18, 2020

• x86/cpu: Enable FSGSBASE on 64bit by default and add a chicken bit

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• x86/process/64: Use FSBSBASE in switch_to() if available

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• x86/cpu: Add 'unsafe_fsgsbase' to enable CR4.FSGSBASE

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Commits on Jun 12, 2020

• x86/entry: Treat BUG/WARN as NMI-like entries

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Commits on Jun 11, 2020

• x86/hw_breakpoint: Prevent data breakpoints on cpu_entry_area

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Commits on May 26, 2020

• x86/syscalls: Revert "x86/syscalls: Make __X32_SYSCALL_BIT be unsigned long"

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