From: Marc Zyngier <maz@kernel.org>
To: linux-arm-kernel@lists.infradead.org,
kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org
Cc: mark.rutland@arm.com, broonie@kernel.org,
madvenka@linux.microsoft.com, tabba@google.com,
oliver.upton@linux.dev, qperret@google.com,
kaleshsingh@google.com, james.morse@arm.com,
alexandru.elisei@arm.com, suzuki.poulose@arm.com,
catalin.marinas@arm.com, andreyknvl@gmail.com,
vincenzo.frascino@arm.com, mhiramat@kernel.org, ast@kernel.org,
wangkefeng.wang@huawei.com, elver@google.com, keirf@google.com,
yuzenghui@huawei.com, ardb@kernel.org, oupton@google.com,
kernel-team@android.com
Subject: [PATCH 0/6] KVM: arm64: nVHE stack unwinder rework
Date: Wed, 27 Jul 2022 15:29:00 +0100 [thread overview]
Message-ID: <20220727142906.1856759-1-maz@kernel.org> (raw)
In-Reply-To: <20220726073750.3219117-18-kaleshsingh@google.com>
Hi all,
As Kalesh's series[1] already went through quite a few rounds and that
it has proved to be an extremely useful debugging help, I'd like to
queue it for 5.20.
However, there is a couple of nits that I'd like to address:
- the code is extremely hard to follow, due to the include maze and
the various levels of inline functions that have forward
declarations...
- there is a subtle bug in the way the kernel on_accessible_stack()
helper has been rewritten
- the config symbol for the protected unwinder is oddly placed
Instead of going for another round and missing the merge window, I
propose to stash the following patches on top, which IMHO result in
something much more readable.
This series directly applies on top of Kalesh's.
[1] https://lore.kernel.org/r/20220726073750.3219117-1-kaleshsingh@google.com
Marc Zyngier (5):
KVM: arm64: Move PROTECTED_NVHE_STACKTRACE around
KVM: arm64: Move nVHE stacktrace unwinding into its own compilation
unit
KVM: arm64: Make unwind()/on_accessible_stack() per-unwinder functions
KVM: arm64: Move nVHE-only helpers into kvm/stacktrace.c
arm64: Update 'unwinder howto'
Oliver Upton (1):
KVM: arm64: Don't open code ARRAY_SIZE()
arch/arm64/include/asm/stacktrace.h | 74 -------
arch/arm64/include/asm/stacktrace/common.h | 69 ++-----
arch/arm64/include/asm/stacktrace/nvhe.h | 125 +-----------
arch/arm64/kernel/stacktrace.c | 90 +++++++++
arch/arm64/kvm/Kconfig | 24 ++-
arch/arm64/kvm/Makefile | 2 +-
arch/arm64/kvm/handle_exit.c | 98 ---------
arch/arm64/kvm/hyp/nvhe/stacktrace.c | 55 +++++-
arch/arm64/kvm/stacktrace.c | 218 +++++++++++++++++++++
9 files changed, 394 insertions(+), 361 deletions(-)
create mode 100644 arch/arm64/kvm/stacktrace.c
--
2.34.1
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next prev parent reply other threads:[~2022-07-27 14:30 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-07-26 7:37 [PATCH v6 00/17] KVM nVHE Hypervisor stack unwinder Kalesh Singh
2022-07-26 7:37 ` [PATCH v6 01/17] arm64: stacktrace: Add shared header for common stack unwinding code Kalesh Singh
2022-07-26 7:37 ` [PATCH v6 02/17] arm64: stacktrace: Factor out on_accessible_stack_common() Kalesh Singh
2022-07-26 16:01 ` Marc Zyngier
2022-07-26 16:33 ` Kalesh Singh
2022-07-26 7:37 ` [PATCH v6 03/17] arm64: stacktrace: Factor out unwind_next_common() Kalesh Singh
2022-07-26 7:37 ` [PATCH v6 04/17] arm64: stacktrace: Handle frame pointer from different address spaces Kalesh Singh
2022-07-26 14:34 ` Mark Brown
2022-07-26 15:30 ` Kalesh Singh
2022-07-26 7:37 ` [PATCH v6 05/17] arm64: stacktrace: Factor out common unwind() Kalesh Singh
2022-07-26 7:37 ` [PATCH v6 06/17] arm64: stacktrace: Add description of stacktrace/common.h Kalesh Singh
2022-07-26 14:49 ` Mark Brown
2022-07-26 7:37 ` [PATCH v6 07/17] KVM: arm64: On stack overflow switch to hyp overflow_stack Kalesh Singh
2022-07-26 7:37 ` [PATCH v6 08/17] KVM: arm64: Stub implementation of non-protected nVHE HYP stack unwinder Kalesh Singh
2022-07-26 7:37 ` [PATCH v6 09/17] KVM: arm64: Prepare non-protected nVHE hypervisor stacktrace Kalesh Singh
2022-07-26 7:37 ` [PATCH v6 10/17] KVM: arm64: Implement non-protected nVHE hyp stack unwinder Kalesh Singh
2022-07-26 7:37 ` [PATCH v6 11/17] KVM: arm64: Introduce hyp_dump_backtrace() Kalesh Singh
2022-07-26 7:37 ` [PATCH v6 12/17] KVM: arm64: Add PROTECTED_NVHE_STACKTRACE Kconfig Kalesh Singh
2022-07-26 10:00 ` Marc Zyngier
2022-07-26 15:33 ` Kalesh Singh
2022-07-26 7:37 ` [PATCH v6 13/17] KVM: arm64: Allocate shared pKVM hyp stacktrace buffers Kalesh Singh
2022-07-26 7:37 ` [PATCH v6 14/17] KVM: arm64: Stub implementation of pKVM HYP stack unwinder Kalesh Singh
2022-07-26 7:37 ` [PATCH v6 15/17] KVM: arm64: Save protected-nVHE (pKVM) hyp stacktrace Kalesh Singh
2022-07-26 7:37 ` [PATCH v6 16/17] KVM: arm64: Implement protected nVHE hyp stack unwinder Kalesh Singh
2022-07-26 7:37 ` [PATCH v6 17/17] KVM: arm64: Introduce pkvm_dump_backtrace() Kalesh Singh
2022-07-27 14:29 ` Marc Zyngier [this message]
2022-07-27 14:29 ` [PATCH 1/6] KVM: arm64: Move PROTECTED_NVHE_STACKTRACE around Marc Zyngier
2022-07-27 14:29 ` [PATCH 2/6] KVM: arm64: Move nVHE stacktrace unwinding into its own compilation unit Marc Zyngier
2022-07-27 14:29 ` [PATCH 3/6] KVM: arm64: Make unwind()/on_accessible_stack() per-unwinder functions Marc Zyngier
2022-07-27 17:32 ` Mark Brown
2022-07-27 14:29 ` [PATCH 4/6] KVM: arm64: Move nVHE-only helpers into kvm/stacktrace.c Marc Zyngier
2022-07-27 14:29 ` [PATCH 5/6] KVM: arm64: Don't open code ARRAY_SIZE() Marc Zyngier
2022-07-27 14:29 ` [PATCH 6/6] arm64: Update 'unwinder howto' Marc Zyngier
2022-07-27 15:56 ` [PATCH 0/6] KVM: arm64: nVHE stack unwinder rework Kalesh Singh
2022-07-27 16:01 ` Oliver Upton
2022-07-27 17:45 ` Marc Zyngier
2022-07-27 17:44 ` [PATCH v6 00/17] KVM nVHE Hypervisor stack unwinder Marc Zyngier
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