On Wed, Nov 21, 2018 at 03:11:21PM -0800, Andy Lutomirski wrote: > This series is a whole bunch of page fault cleanups, plus a couple > of OOPS diagnostic improvements. The overall goals are to clean up > handling of the faulting CPL, the USER bit in the error_code, and > the log messages generated by #PF OOPSes. > > This series can also be seen as CET preparation. CET introduces the > WRUSS instruction, which is the very first way for CPL 0 code to > cause a #PF fault with the USER bit set. Let's get the page fault > code into shape before we start using WRUSS :) > > Changes from v1: > - Rebase on top of tip:x86/mm, now that a bunch of v1 was applied. > The only material changes are that 'x86/fault: Check > user_mode(regs) when validating a stack extension' is gone > because the code it fixed has been deleted and that 'x86/fault: > Remove sw_error_code' lost the hunk that changed the same code. > > Andy Lutomirski (5): > x86/fault: Remove sw_error_code > x86/fault: Don't try to recover from an implicit supervisor access > x86/oops: Show the correct CS value in show_regs() > x86/fault: Decode page fault OOPSes better > x86/vsyscall/64: Use X86_PF constants in the simulated #PF error code > > arch/x86/entry/vsyscall/vsyscall_64.c | 2 +- > arch/x86/kernel/process_64.c | 5 +- > arch/x86/mm/fault.c | 144 +++++++++++++++++++------- > 3 files changed, 108 insertions(+), 43 deletions(-)
All looks good to me, Acked-by: Peter Zijlstra (Intel) <pet...@infradead.org>
