linux-kernel - [PATCH 0/6] x86/entry: Fixes

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Message-Id: <cover.1593191971.git.luto@kernel.org>
Date:   Fri, 26 Jun 2020 10:21:10 -0700
From:   Andy Lutomirski <luto@...nel.org>
To:     x86@...nel.org
Cc:     linux-kernel@...r.kernel.org,
        Andrew Cooper <andrew.cooper3@...rix.com>,
        Juergen Gross <jgross@...e.com>,
        Andy Lutomirski <luto@...nel.org>
Subject: [PATCH 0/6] x86/entry: Fixes

Half of this is selftests.  The rest adds some confidence-improving
assertions and fixes a crash when running on Xen PV.

Andy Lutomirski (6):
  x86/entry: Assert that syscalls are on the right stack
  x86/entry: Move SYSENTER's regs->sp and regs->flags fixups into C
  x86/entry/64/compat: Fix Xen PV SYSENTER frame setup
  selftests/x86/syscall_nt: Add more flag combinations
  selftests/x86/syscall_nt: Clear weird flags after each test
  selftests/x86: Consolidate and fix get/set_eflags() helpers

 arch/x86/entry/common.c                       | 30 ++++++++++++--
 arch/x86/entry/entry_32.S                     |  5 +--
 arch/x86/entry/entry_64_compat.S              | 12 +++---
 arch/x86/xen/xen-asm_64.S                     | 20 +++++++--
 tools/testing/selftests/x86/Makefile          |  4 +-
 tools/testing/selftests/x86/helpers.h         | 41 +++++++++++++++++++
 .../selftests/x86/single_step_syscall.c       | 17 +-------
 .../testing/selftests/x86/syscall_arg_fault.c | 21 +---------
 tools/testing/selftests/x86/syscall_nt.c      | 36 ++++++++--------
 tools/testing/selftests/x86/test_vsyscall.c   | 15 +------
 tools/testing/selftests/x86/unwind_vdso.c     | 23 +----------
 11 files changed, 118 insertions(+), 106 deletions(-)
 create mode 100644 tools/testing/selftests/x86/helpers.h

-- 
2.25.4