[PATCH 00/18] Pile o' entry/exit/sp0 changes

Andy Lutomirski
2017-10-26T08:27:04Z

Hi all-

Here's the first "real" version of this series. It's based on Linus'
tree from a couple days ago.

Changes from the old RFC version:
- Rebase
- Add Juergen's patch
- Add some assertions
- Cleanups

Andy Lutomirski (17):
x86/asm/64: Remove the restore_c_regs_and_iret label
x86/asm/64: Split the iret-to-user and iret-to-kernel paths
x86/asm/64: Move SWAPGS into the common iret-to-usermode path
x86/asm/64: Simplify reg restore code in the standard IRET paths
x86/asm/64: Shrink paranoid_exit_restore and make labels local
x86/asm/64: Use pop instead of movq in syscall_return_via_sysret
x86/asm/64: Merge the fast and slow SYSRET paths
x86/asm/64: De-Xen-ify our NMI code
x86/asm/32: Pull MSR_IA32_SYSENTER_CS update code out of
native_load_sp0()
x86/asm/64: Pass sp0 directly to load_sp0()
x86/asm: Add task_top_of_stack() to find the top of a task's stack
x86/xen/64: Clean up SP code in cpu_initialize_context()
x86/boot/64: Stop initializing TSS.sp0 at boot
x86/asm/64: Remove all remaining direct thread_struct::sp0 reads
x86/boot/32: Fix cpu_current_top_of_stack initialization at boot
x86/asm/64: Remove thread_struct::sp0
x86/traps: Use a new on_thread_stack() helper to clean up an assertion

Juergen Gross (1):
xen: add xen nmi trap entry

arch/x86/entry/calling.h | 21 ++++++
arch/x86/entry/entry_64.S | 120 +++++++++++++++++++---------------
arch/x86/entry/entry_64_compat.S | 3 +-
arch/x86/include/asm/compat.h | 1 +
arch/x86/include/asm/paravirt.h | 5 +-
arch/x86/include/asm/paravirt_types.h | 2 +-
arch/x86/include/asm/processor.h | 57 ++++++++--------
arch/x86/include/asm/switch_to.h | 23 +++++++
arch/x86/include/asm/traps.h | 2 +-
arch/x86/kernel/cpu/common.c | 12 +++-
arch/x86/kernel/head_64.S | 2 +-
arch/x86/kernel/process.c | 3 +-
arch/x86/kernel/process_32.c | 3 +-
arch/x86/kernel/process_64.c | 5 +-
arch/x86/kernel/smpboot.c | 3 +-
arch/x86/kernel/traps.c | 3 +-
arch/x86/kernel/vm86_32.c | 20 +++---
arch/x86/xen/enlighten_pv.c | 9 ++-
arch/x86/xen/smp_pv.c | 17 ++++-
arch/x86/xen/xen-asm_64.S | 2 +-
20 files changed, 195 insertions(+), 118 deletions(-)

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2.13.6