linux-kernel.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
* [PATCH 0/9] arm64: add more accurate code for tracing the hardirq flags changes
@ 2016-05-30  2:52 Huang Shijie
  2016-05-30  2:52 ` [PATCH 1/9] arm64: entry: use the callee-saved registers to save some registers Huang Shijie
                   ` (8 more replies)
  0 siblings, 9 replies; 10+ messages in thread
From: Huang Shijie @ 2016-05-30  2:52 UTC (permalink / raw)
  To: catalin.marinas
  Cc: will.deacon, nd, mark.rutland, marc.zyngier, linux-arm-kernel,
	linux-kernel, steve.capper, cmetcalf, Huang Shijie

In the current arm64 code, we trace the hardirq flags change occasionally.
Sometimes, the trace code is buggy, such as the el0_irq.

This patch sets 
   0.) in order to avoid the save/restore registers, add patches to adjust
        the code.
   1.) add the trace code at the entry/exit, 
   2.) add the trace code at the irq macros.
   3.) removes the duplicated trace code.

I tested this patch set with CONFIG_PROVE_LOCKING/CONFIG_LOCKDEP/CONFIG_LOCK_STAT
enabled in the Juno-r1 board.

The whole patch set is based on the patch: 
    http://lists.infradead.org/pipermail/linux-arm-kernel/2016-April/420154.html

Thanks to the code review of Steve/James/Mark, I really appriciate it.

Huang Shijie (9):
  arm64: entry: use the callee-saved registers to save some registers
  arm64: entry: add a new macro to restore the registers for syscall
  arm64: entry: record the hardirq changes on the entry/exit code
  arm64: entry: remove the duplicated code for tracing the IRQ flags
  arm64: entry: only restore the syscall registers once
  arm64: entry: adjust el1_sync so that a function can be called
  arm64: entry: save the x0 back into the stack before disabling the
    interrupt
  arm64: add the hardirq flags trace code for irq macros
  arm64: entry: remove the duplicated hardirq flags trace code

 arch/arm64/include/asm/assembler.h |  9 ++++
 arch/arm64/kernel/entry.S          | 88 ++++++++++++++++++++++----------------
 arch/arm64/kernel/signal.c         |  6 ---
 arch/arm64/mm/fault.c              | 10 -----
 4 files changed, 59 insertions(+), 54 deletions(-)

-- 
2.5.5

^ permalink raw reply	[flat|nested] 10+ messages in thread
end of thread, other threads:[~2016-05-30  2:55 UTC | newest]

Thread overview: 10+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2016-05-30  2:52 [PATCH 0/9] arm64: add more accurate code for tracing the hardirq flags changes Huang Shijie
2016-05-30  2:52 ` [PATCH 1/9] arm64: entry: use the callee-saved registers to save some registers Huang Shijie
2016-05-30  2:52 ` [PATCH 2/9] arm64: entry: add a new macro to restore the registers for syscall Huang Shijie
2016-05-30  2:52 ` [PATCH 3/9] arm64: entry: record the hardirq changes on the entry/exit code Huang Shijie
2016-05-30  2:52 ` [PATCH 4/9] arm64: entry: remove the duplicated code for tracing the IRQ flags Huang Shijie
2016-05-30  2:52 ` [PATCH 5/9] arm64: entry: only restore the syscall registers once Huang Shijie
2016-05-30  2:52 ` [PATCH 6/9] arm64: entry: adjust el1_sync so that a function can be called Huang Shijie
2016-05-30  2:52 ` [PATCH 7/9] arm64: entry: save the x0 back into the stack before disabling the interrupt Huang Shijie
2016-05-30  2:52 ` [PATCH 8/9] arm64: add the hardirq flags trace code for irq macros Huang Shijie
2016-05-30  2:52 ` [PATCH 9/9] arm64: entry: remove the duplicated hardirq flags trace code Huang Shijie

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).