All of lore.kernel.org
 help / color / mirror / Atom feed
From: Arnd Bergmann <arnd@arndb.de>
To: Ard Biesheuvel <ardb@kernel.org>
Cc: Linux ARM <linux-arm-kernel@lists.infradead.org>,
	 Russell King - ARM Linux <linux@armlinux.org.uk>,
	Arnd Bergmann <arnd@arndb.de>, Kees Cook <keescook@chromium.org>,
	 Keith Packard <keithpac@amazon.com>,
	Linus Walleij <linus.walleij@linaro.org>
Subject: Re: [PATCH v2 7/9] ARM: implement IRQ stacks
Date: Tue, 5 Oct 2021 14:26:04 +0200	[thread overview]
Message-ID: <CAK8P3a0V3GVWdyUoxgd2v02+nX8ssB6gQU08mtTU4w=pjd16og@mail.gmail.com> (raw)
In-Reply-To: <20211005071542.3127341-8-ardb@kernel.org>

On Tue, Oct 5, 2021 at 9:15 AM Ard Biesheuvel <ardb@kernel.org> wrote:
>
> Now that we no longer rely on the stack pointer to access the current
> task struct or thread info, we can implement support for IRQ stacks
> cleanly as well.
>
> Define a per-CPU IRQ stack and switch to this stack when taking an IRQ,
> provided that we were not already using that stack in the interrupted
> context. This is never the case for IRQs taken from user space, but ones
> taken while running in the kernel could fire while one taken from user
> space has not completed yet.
>
> Signed-off-by: Ard Biesheuvel <ardb@kernel.org>

This is where I get stuck in my review, I assume it's all good here,
but I can't honestly claim to have reviewed it without a better
understanding.

Hopefully one of the others on Cc can step in here and take a
closer look.

       Arnd

_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

  reply	other threads:[~2021-10-05 12:28 UTC|newest]

Thread overview: 27+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-10-05  7:15 [PATCH v2 0/9] ARM: add support for IRQ stacks Ard Biesheuvel
2021-10-05  7:15 ` [PATCH v2 1/9] ARM: remove some dead code Ard Biesheuvel
2021-10-05 12:06   ` Arnd Bergmann
2021-10-05  7:15 ` [PATCH v2 2/9] ARM: assembler: introduce bl_r and bl_m macros Ard Biesheuvel
2021-10-05 12:10   ` Arnd Bergmann
2021-10-05 12:14     ` Ard Biesheuvel
2021-10-05  7:15 ` [PATCH v2 3/9] ARM: optimize indirect call to handle_arch_irq for v7 cores Ard Biesheuvel
2021-10-05 12:11   ` Arnd Bergmann
2021-10-05  7:15 ` [PATCH v2 4/9] ARM: unwind: support unwinding across multiple stacks Ard Biesheuvel
2021-10-05 12:17   ` Arnd Bergmann
2021-10-05  7:15 ` [PATCH v2 5/9] ARM: export dump_mem() to other objects Ard Biesheuvel
2021-10-05 12:15   ` Arnd Bergmann
2021-10-05  7:15 ` [PATCH v2 6/9] ARM: unwind: dump exception stack from calling frame Ard Biesheuvel
2021-10-05 12:20   ` Arnd Bergmann
2021-10-05  7:15 ` [PATCH v2 7/9] ARM: implement IRQ stacks Ard Biesheuvel
2021-10-05 12:26   ` Arnd Bergmann [this message]
2021-10-05  7:15 ` [PATCH v2 8/9] ARM: call_with_stack: add unwind support Ard Biesheuvel
2021-10-05 12:22   ` Arnd Bergmann
2021-10-05 18:46     ` Nick Desaulniers
2021-10-05 18:46       ` Nick Desaulniers
2021-10-05 18:57       ` Ard Biesheuvel
2021-10-05 18:57         ` Ard Biesheuvel
2021-10-05  7:15 ` [PATCH v2 9/9] ARM: run softirqs on the per-CPU IRQ stack Ard Biesheuvel
2021-10-05 12:23   ` Arnd Bergmann
2021-10-06 15:21     ` Ard Biesheuvel
2021-10-11 23:29 ` [PATCH v2 0/9] ARM: add support for IRQ stacks Keith Packard
2021-10-16 22:04 ` Linus Walleij

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to='CAK8P3a0V3GVWdyUoxgd2v02+nX8ssB6gQU08mtTU4w=pjd16og@mail.gmail.com' \
    --to=arnd@arndb.de \
    --cc=ardb@kernel.org \
    --cc=keescook@chromium.org \
    --cc=keithpac@amazon.com \
    --cc=linus.walleij@linaro.org \
    --cc=linux-arm-kernel@lists.infradead.org \
    --cc=linux@armlinux.org.uk \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.