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From: Thomas Gleixner <tglx@linutronix.de>
To: LKML <linux-kernel@vger.kernel.org>
Cc: x86@kernel.org, "Paul E. McKenney" <paulmck@kernel.org>,
	Andy Lutomirski <luto@kernel.org>,
	Alexandre Chartre <alexandre.chartre@oracle.com>,
	Frederic Weisbecker <frederic@kernel.org>,
	Paolo Bonzini <pbonzini@redhat.com>,
	Sean Christopherson <sean.j.christopherson@intel.com>,
	Masami Hiramatsu <mhiramat@kernel.org>,
	Petr Mladek <pmladek@suse.com>,
	Steven Rostedt <rostedt@goodmis.org>,
	Joel Fernandes <joel@joelfernandes.org>,
	Boris Ostrovsky <boris.ostrovsky@oracle.com>,
	Juergen Gross <jgross@suse.com>, Brian Gerst <brgerst@gmail.com>,
	Mathieu Desnoyers <mathieu.desnoyers@efficios.com>,
	Josh Poimboeuf <jpoimboe@redhat.com>,
	Will Deacon <will@kernel.org>
Subject: [patch V4 part 3 00/29] x86/entry: Entry/exception code rework, simple exceptions
Date: Tue, 05 May 2020 15:43:54 +0200	[thread overview]
Message-ID: <20200505134354.774943181@linutronix.de> (raw)

Folks,

This is the third part of the rework series. Part 2 can be found here:

 https://lore.kernel.org/r/20200505134112.272268764@linutronix.de

The series has a total of 138 patches and is split into 5 parts. The base
for this 3rd series is:

  git://git.kernel.org/pub/scm/linux/kernel/git/tglx/devel.git entry-v4-part-2

The full series with all parts applied is available here:

  git://git.kernel.org/pub/scm/linux/kernel/git/tglx/devel.git entry-v4-part-5

The third part, i.e. this series is available from:

  git://git.kernel.org/pub/scm/linux/kernel/git/tglx/devel.git entry-v4-part-3
 
This part contains the modifications for the simple exceptions and traps:

 - Preparatory changes and simplifications moving especially tracing affected
   code out of ASM

 - Distangle the unreadable idtentry maze on 64bit

 - Provide C entry/exit functions which handle the transitions vs. RCU,
   context tracking and instrumentation.
 
 - Provide a set of macros to define and declare exception and trap handlers

   The macros generate:
     - The prototypes for the relevant C, ASM and XEN/PV functions
     - C wrappers for the actual handler code which contain all
       the necessary entry handling
     - Automatic emission of the low level ASM entry code  

 - Converting the trivial exceptions over to the new scheme

The objtool check for the noinstr.text correctness is not yet added to the
build machinery and has to be invoked manually for now:

   objtool check -fal vmlinux.o

The checking only works for builtin code as objtool cannot do a combined
analysis of vmlinux.o and a module.o

Thanks,

	tglx

8<----------
 arch/x86/entry/common.c              |   90 +++++++
 arch/x86/entry/entry_32.S            |  188 ++++++---------
 arch/x86/entry/entry_64.S            |  436 +++++++++++++++++++----------------
 arch/x86/include/asm/idtentry.h      |  153 ++++++++++++
 arch/x86/include/asm/special_insns.h |   14 -
 arch/x86/include/asm/trapnr.h        |   31 ++
 arch/x86/include/asm/traps.h         |   76 ------
 arch/x86/kernel/idt.c                |   28 +-
 arch/x86/kernel/traps.c              |  184 +++++++++-----
 arch/x86/mm/fault.c                  |   17 +
 arch/x86/xen/enlighten_pv.c          |   33 +-
 arch/x86/xen/xen-asm_32.S            |    2 
 arch/x86/xen/xen-asm_64.S            |   28 +-
 include/linux/rcutiny.h              |    1 
 include/linux/rcutree.h              |    1 
 kernel/rcu/tree.c                    |   21 +
 16 files changed, 808 insertions(+), 495 deletions(-)

             reply	other threads:[~2020-05-05 14:15 UTC|newest]

Thread overview: 129+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-05-05 13:43 Thomas Gleixner [this message]
2020-05-05 13:43 ` [patch V4 part 3 01/29] x86/traps: Mark fixup_bad_iret() noinstr Thomas Gleixner
2020-05-09  0:39   ` Andy Lutomirski
2020-05-13  1:51     ` Steven Rostedt
2020-05-14  0:41       ` Mathieu Desnoyers
2020-05-14  1:35         ` Andy Lutomirski
2020-05-11 12:28   ` Masami Hiramatsu
2020-05-19 19:58   ` [tip: x86/entry] " tip-bot2 for Thomas Gleixner
2020-05-05 13:43 ` [patch V4 part 3 02/29] x86/traps: Mark sync_regs() noinstr Thomas Gleixner
2020-05-09  0:39   ` Andy Lutomirski
2020-05-11 12:08   ` Masami Hiramatsu
2020-05-19 19:58   ` [tip: x86/entry] " tip-bot2 for Thomas Gleixner
2020-05-05 13:43 ` [patch V4 part 3 03/29] x86/entry: Disable interrupts for native_load_gs_index() in C code Thomas Gleixner
2020-05-09  0:40   ` Andy Lutomirski
2020-05-19 19:58   ` [tip: x86/entry] " tip-bot2 for Thomas Gleixner
2020-05-05 13:43 ` [patch V4 part 3 04/29] x86/traps: Make interrupt enable/disable symmetric " Thomas Gleixner
2020-05-07 15:25   ` Alexandre Chartre
2020-05-07 17:14     ` Thomas Gleixner
2020-05-09  0:44   ` Andy Lutomirski
2020-05-19 19:58   ` [tip: x86/entry] " tip-bot2 for Thomas Gleixner
2020-05-05 13:43 ` [patch V4 part 3 05/29] x86/traps: Split trap numbers out in a seperate header Thomas Gleixner
2020-05-07 15:34   ` Alexandre Chartre
2020-05-19 19:58   ` [tip: x86/entry] x86/traps: Split trap numbers out in a separate header tip-bot2 for Thomas Gleixner
2020-05-05 13:44 ` [patch V4 part 3 06/29] x86/entry/64: Reorder idtentries Thomas Gleixner
2020-05-19 19:58   ` [tip: x86/entry] " tip-bot2 for Thomas Gleixner
2020-05-05 13:44 ` [patch V4 part 3 07/29] x86/entry: Distangle idtentry Thomas Gleixner
2020-05-10 20:31   ` Andy Lutomirski
2020-05-19 19:58   ` [tip: x86/entry] " tip-bot2 for Thomas Gleixner
2020-05-05 13:44 ` [patch V4 part 3 08/29] x86/entry/64: Provide sane error entry/exit Thomas Gleixner
2020-05-10 21:02   ` Andy Lutomirski
2020-05-13  2:10   ` Steven Rostedt
2020-05-13  6:35     ` Thomas Gleixner
2020-05-19 19:58   ` [tip: x86/entry] " tip-bot2 for Thomas Gleixner
2020-05-05 13:44 ` [patch V4 part 3 09/29] x86/entry/32: Provide macro to emit IDT entry stubs Thomas Gleixner
2020-05-11  0:55   ` Andy Lutomirski
2020-05-14  1:44   ` Mathieu Desnoyers
2020-05-14  4:31     ` Andy Lutomirski
2020-05-14 13:38       ` Mathieu Desnoyers
2020-05-14 14:08         ` Thomas Gleixner
2020-05-14 14:43           ` Mathieu Desnoyers
2020-05-19 19:58   ` [tip: x86/entry] " tip-bot2 for Thomas Gleixner
2020-05-05 13:44 ` [patch V4 part 3 10/29] x86/idtentry: Provide macros to define/declare IDT entry points Thomas Gleixner
2020-05-11  0:58   ` Andy Lutomirski
2020-05-11 10:39     ` Thomas Gleixner
2020-05-19 19:58   ` [tip: x86/entry] " tip-bot2 for Thomas Gleixner
2020-05-05 13:44 ` [patch V4 part 3 11/29] rcu: Provide rcu_irq_exit_preempt() Thomas Gleixner
2020-05-05 22:02   ` Paul E. McKenney
2020-05-05 22:05     ` Thomas Gleixner
2020-05-05 22:24       ` Paul E. McKenney
2020-05-14  1:03   ` Mathieu Desnoyers
2020-05-14  2:41   ` Joel Fernandes
2020-05-14  2:46     ` Joel Fernandes
2020-05-14 14:43     ` Thomas Gleixner
2020-05-15 19:00       ` Joel Fernandes
2020-05-19 19:52   ` [tip: core/rcu] " tip-bot2 for Thomas Gleixner
2020-05-05 13:44 ` [patch V4 part 3 12/29] x86/entry/common: Provide idtentry_enter/exit() Thomas Gleixner
2020-05-07 16:27   ` Alexandre Chartre
2020-05-11  4:34   ` Andy Lutomirski
2020-05-11 10:59     ` [patch V5 " Thomas Gleixner
2020-05-11 15:31       ` Andy Lutomirski
2020-05-11 18:42         ` Thomas Gleixner
2020-05-12 16:49           ` [patch V6 " Thomas Gleixner
2020-05-14  0:51             ` Andy Lutomirski
2020-05-14  1:08   ` [patch V4 " Mathieu Desnoyers
2020-05-19 19:58   ` [tip: x86/entry] " tip-bot2 for Thomas Gleixner
2020-05-05 13:44 ` [patch V4 part 3 13/29] x86/traps: Prepare for using DEFINE_IDTENTRY Thomas Gleixner
2020-05-14  4:37   ` Andy Lutomirski
2020-05-14 12:16     ` Thomas Gleixner
2020-05-14 12:33       ` Peter Zijlstra
2020-05-15 13:42       ` Thomas Gleixner
2020-05-19 19:58   ` [tip: x86/entry] " tip-bot2 for Thomas Gleixner
2020-05-05 13:44 ` [patch V4 part 3 14/29] x86/entry: Convert Divide Error to IDTENTRY Thomas Gleixner
2020-05-14  4:38   ` Andy Lutomirski
2020-05-19 19:58   ` [tip: x86/entry] " tip-bot2 for Thomas Gleixner
2020-10-11 15:25     ` Dmitry Vyukov
2020-10-11 17:50       ` Thomas Gleixner
2020-10-12 13:19       ` [tip: x86/urgent] x86/traps: Fix #DE Oops message regression tip-bot2 for Thomas Gleixner
2020-10-12 20:30       ` [tip: x86/entry] x86/entry: Convert Divide Error to IDTENTRY Kees Cook
2020-10-13 10:19         ` Dmitry Vyukov
2020-10-13 17:41       ` [tip: x86/urgent] x86/traps: Fix #DE Oops message regression tip-bot2 for Thomas Gleixner
2020-05-05 13:44 ` [patch V4 part 3 15/29] x86/entry: Convert Overflow exception to IDTENTRY Thomas Gleixner
2020-05-14  4:39   ` Andy Lutomirski
2020-05-19 19:58   ` [tip: x86/entry] " tip-bot2 for Thomas Gleixner
2020-05-05 13:44 ` [patch V4 part 3 16/29] x86/entry: Convert Bounds " Thomas Gleixner
2020-05-14  4:42   ` Andy Lutomirski
2020-05-19 19:58   ` [tip: x86/entry] " tip-bot2 for Thomas Gleixner
2020-05-05 13:44 ` [patch V4 part 3 17/29] x86/entry: Convert Invalid Opcode " Thomas Gleixner
2020-05-14  4:45   ` Andy Lutomirski
2020-05-14 12:33     ` Thomas Gleixner
2020-05-14 15:00       ` Andy Lutomirski
2020-05-19 19:58   ` [tip: x86/entry] " tip-bot2 for Thomas Gleixner
2020-05-05 13:44 ` [patch V4 part 3 18/29] x86/entry: Convert Device not available " Thomas Gleixner
2020-05-14  4:45   ` Andy Lutomirski
2020-05-19 19:58   ` [tip: x86/entry] " tip-bot2 for Thomas Gleixner
2020-05-05 13:44 ` [patch V4 part 3 19/29] x86/entry: Convert Coprocessor segment overrun " Thomas Gleixner
2020-05-14  4:46   ` Andy Lutomirski
2020-05-05 13:44 ` [patch V4 part 3 20/29] x86/entry: Provide IDTENTRY_ERRORCODE Thomas Gleixner
2020-05-14  4:46   ` Andy Lutomirski
2020-05-19 19:58   ` [tip: x86/entry] x86/idtentry: " tip-bot2 for Thomas Gleixner
2020-05-05 13:44 ` [patch V4 part 3 21/29] x86/entry: Convert Invalid TSS exception to IDTENTRY Thomas Gleixner
2020-05-14  4:48   ` Andy Lutomirski
2020-05-19 19:58   ` [tip: x86/entry] " tip-bot2 for Thomas Gleixner
2020-05-05 13:44 ` [patch V4 part 3 22/29] x86/entry: Convert Segment not present " Thomas Gleixner
2020-05-14  4:47   ` Andy Lutomirski
2020-05-19 19:58   ` [tip: x86/entry] " tip-bot2 for Thomas Gleixner
2020-05-05 13:44 ` [patch V4 part 3 23/29] x86/entry: Convert Stack segment " Thomas Gleixner
2020-05-14  4:49   ` Andy Lutomirski
2020-05-19 19:58   ` [tip: x86/entry] " tip-bot2 for Thomas Gleixner
2020-05-05 13:44 ` [patch V4 part 3 24/29] x86/entry: Convert General protection " Thomas Gleixner
2020-05-14  4:50   ` Andy Lutomirski
2020-05-19 19:58   ` [tip: x86/entry] " tip-bot2 for Thomas Gleixner
2020-05-05 13:44 ` [patch V4 part 3 25/29] x86/entry: Convert Spurious interrupt bug " Thomas Gleixner
2020-05-14  4:47   ` Andy Lutomirski
2020-05-19 19:58   ` [tip: x86/entry] " tip-bot2 for Thomas Gleixner
2020-05-05 13:44 ` [patch V4 part 3 26/29] x86/entry: Convert Coprocessor error " Thomas Gleixner
2020-05-14  4:49   ` Andy Lutomirski
2020-05-19 19:58   ` [tip: x86/entry] " tip-bot2 for Thomas Gleixner
2020-05-19 19:58   ` [tip: x86/entry] x86/entry: Convert Coprocessor segment overrun " tip-bot2 for Thomas Gleixner
2020-05-05 13:44 ` [patch V4 part 3 27/29] x86/entry: Convert Alignment check " Thomas Gleixner
2020-05-14  4:50   ` Andy Lutomirski
2020-05-19 19:58   ` [tip: x86/entry] " tip-bot2 for Thomas Gleixner
2020-05-05 13:44 ` [patch V4 part 3 28/29] x86/entry: Convert SIMD coprocessor error " Thomas Gleixner
2020-05-14  4:56   ` Andy Lutomirski
2020-05-19 19:58   ` [tip: x86/entry] " tip-bot2 for Thomas Gleixner
2020-05-05 13:44 ` [patch V4 part 3 29/29] x86/entry/32: Convert IRET exception to IDTENTRY_SW Thomas Gleixner
2020-05-07 16:47   ` Alexandre Chartre
2020-05-14  4:54   ` Andy Lutomirski
2020-05-15 14:11     ` Thomas Gleixner
2020-05-19 19:58   ` [tip: x86/entry] " tip-bot2 for Thomas Gleixner

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