Hi,
[Changing the title to make it reflex more the status of the series.]
Version one[1] of this series attempted to fix the issue reported by
Zenghui[2] when using the function_graph tracer with IRQ priority
masking.
Since then, I realized that priority masking and the use of Pseudo-NMIs
was more broken than I thought.
* Patch 1 is just some rework
* Patch 2 replaces the previous irqflags tracing "simplification" with
a proper fix when tracing Pseudo-NMI
* Patch 3 fixes the function_graph issue when using priority masking
* Patch 4 introduces some debug to hopefully avoid breaking things in
the future
* Patch 5 is a rebased version of the patch sent by Wei Li[3] fixing
an error that can happen during on some platform using the priority
masking feature
Changes since V1 [1]:
- Fix possible race condition between NMI and trace irqflags
- Simplify the representation of PSR.I in the PMR value
- Include Wei Li's fix
- Rebase on v5.1-rc7
[1] https://marc.info/?l=linux-arm-kernel&m=155542458004480&w=2
[2] https://www.spinics.net/lists/arm-kernel/msg716956.html
[3] https://www.spinics.net/lists/arm-kernel/msg722171.html
Cheers,
Julien
-->
Julien Thierry (4):
arm64: Do not enable IRQs for ct_user_exit
arm64: Fix interrupt tracing in the presence of NMIs
arm64: Fix incorrect irqflag restore for priority masking
arm64: irqflags: Introduce explicit debugging for IRQ priorities
Wei Li (1):
arm64: fix kernel stack overflow in kdump capture kernel
arch/arm64/Kconfig | 11 +++++
arch/arm64/include/asm/arch_gicv3.h | 4 +-
arch/arm64/include/asm/assembler.h | 9 ++++
arch/arm64/include/asm/daifflags.h | 31 +++++++++++---
arch/arm64/include/asm/irqflags.h | 83 +++++++++++++++++++------------------
arch/arm64/include/asm/kvm_host.h | 4 +-
arch/arm64/include/asm/ptrace.h | 10 ++++-
arch/arm64/kernel/entry.S | 76 +++++++++++++++++++++++++--------
arch/arm64/kernel/irq.c | 26 ++++++++++++
arch/arm64/kernel/process.c | 2 +-
arch/arm64/kernel/smp.c | 6 +--
arch/arm64/kvm/hyp/switch.c | 2 +-
drivers/irqchip/irq-gic-v3.c | 6 +++
kernel/irq/irqdesc.c | 8 +++-
14 files changed, 202 insertions(+), 76 deletions(-)
--
1.9.1
Hi Julien,
On Mon, Apr 29, 2019 at 05:00:02PM +0100, Julien Thierry wrote:
> [Changing the title to make it reflex more the status of the series.]
>
> Version one[1] of this series attempted to fix the issue reported by
> Zenghui[2] when using the function_graph tracer with IRQ priority
> masking.
>
> Since then, I realized that priority masking and the use of Pseudo-NMIs
> was more broken than I thought.
Do you plan to respin this in light of Marc's comments?
Will
Hi again, Julien,
On Thu, May 23, 2019 at 05:51:55PM +0100, Will Deacon wrote:
> On Mon, Apr 29, 2019 at 05:00:02PM +0100, Julien Thierry wrote:
> > [Changing the title to make it reflex more the status of the series.]
> >
> > Version one[1] of this series attempted to fix the issue reported by
> > Zenghui[2] when using the function_graph tracer with IRQ priority
> > masking.
> >
> > Since then, I realized that priority masking and the use of Pseudo-NMIs
> > was more broken than I thought.
>
> Do you plan to respin this in light of Marc's comments?
For now, I marked this as depending on BROKEN in mainline, but please can
you look at respinning these fixes so that we can get things fixed properly
for 5.3?
Thanks,
Will