From: Andrey Konovalov <andreyknvl@gmail.com>
To: Marco Elver <elver@google.com>
Cc: andrey.konovalov@linux.dev,
Alexander Potapenko <glider@google.com>,
Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will@kernel.org>,
Andrew Morton <akpm@linux-foundation.org>,
Dmitry Vyukov <dvyukov@google.com>,
Andrey Ryabinin <ryabinin.a.a@gmail.com>,
kasan-dev <kasan-dev@googlegroups.com>,
Mark Rutland <mark.rutland@arm.com>,
Vincenzo Frascino <vincenzo.frascino@arm.com>,
Sami Tolvanen <samitolvanen@google.com>,
Peter Collingbourne <pcc@google.com>,
Evgenii Stepanov <eugenis@google.com>,
Florian Mayer <fmayer@google.com>,
Linux Memory Management List <linux-mm@kvack.org>,
LKML <linux-kernel@vger.kernel.org>,
Andrey Konovalov <andreyknvl@google.com>
Subject: Re: [PATCH v2 0/4] kasan, arm64, scs, stacktrace: collect stack traces from Shadow Call Stack
Date: Tue, 29 Mar 2022 20:36:29 +0200 [thread overview]
Message-ID: <CA+fCnZeiR4v72P1fbF1AP=RqViCnkdtES0NtcmN6-R-_9NS4kQ@mail.gmail.com> (raw)
In-Reply-To: <CANpmjNP_bWMzSkW=Q8Lc7yRWw8as_FoBpD-zwcweAiSBVn-Fsw@mail.gmail.com>
On Mon, Mar 28, 2022 at 2:36 PM Marco Elver <elver@google.com> wrote:
>
> > Changes v1->v2:
> > - Provide a kernel-wide stack_trace_save_shadow() interface for collecting
> > stack traces from shadow stack.
> > - Use ptrauth_strip_insn_pac() and READ_ONCE_NOCHECK, see the comments.
> > - Get SCS pointer from x18, as per-task value is meant to save the SCS
> > value on CPU switches.
> > - Collect stack frames from SDEI and IRQ contexts.
>
> Do any of these new changes introduce new (noticeable) overhead (in
> particular patch 2)?
I'll measure the overheads and include the results into v3. Thanks!
next prev parent reply other threads:[~2022-03-29 18:36 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-03-23 15:32 [PATCH v2 0/4] kasan, arm64, scs, stacktrace: collect stack traces from Shadow Call Stack andrey.konovalov
2022-03-23 15:32 ` [PATCH v2 1/4] stacktrace: add interface based on shadow call stack andrey.konovalov
2022-03-25 20:46 ` Andrew Morton
2022-03-29 18:36 ` Andrey Konovalov
2022-03-31 9:19 ` Mark Rutland
2022-04-05 15:37 ` Andrey Konovalov
2022-03-23 15:32 ` [PATCH v2 2/4] arm64, scs: save scs_sp values per-cpu when switching stacks andrey.konovalov
2022-03-24 11:08 ` kernel test robot
2022-03-24 21:39 ` kernel test robot
2022-03-31 9:24 ` Mark Rutland
2022-04-05 15:22 ` Andrey Konovalov
2022-03-23 15:32 ` [PATCH v2 3/4] arm64: implement stack_trace_save_shadow andrey.konovalov
2022-03-24 8:35 ` kernel test robot
2022-03-31 9:32 ` Mark Rutland
2022-04-05 15:38 ` Andrey Konovalov
2022-03-23 15:32 ` [PATCH v2 4/4] kasan: use stack_trace_save_shadow andrey.konovalov
2022-03-28 12:49 ` Marco Elver
2022-03-29 18:36 ` Andrey Konovalov
2022-03-28 12:36 ` [PATCH v2 0/4] kasan, arm64, scs, stacktrace: collect stack traces from Shadow Call Stack Marco Elver
2022-03-29 18:36 ` Andrey Konovalov [this message]
2022-03-29 20:11 ` Andrey Konovalov
2022-03-31 9:54 ` Mark Rutland
2022-03-31 12:39 ` Mark Rutland
2022-04-05 15:10 ` Andrey Konovalov
2022-04-07 18:41 ` Mark Rutland
2022-04-13 19:28 ` Andrey Konovalov
2022-04-14 7:02 ` Mark Rutland
2022-04-05 15:09 ` Andrey Konovalov
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