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Date:   Wed, 18 Nov 2020 09:27:37 +0000
From:   Will Deacon <will@kernel.org>
To:     Catalin Marinas <catalin.marinas@arm.com>
Cc:     Sami Tolvanen <samitolvanen@google.com>,
        Mark Rutland <mark.rutland@arm.com>,
        James Morse <james.morse@arm.com>,
        Ard Biesheuvel <ard.biesheuvel@linaro.org>,
        Kees Cook <keescook@chromium.org>,
        linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 0/2] scs: switch to vmapped shadow stacks
Message-ID: <20201118092736.GA1577@willie-the-truck>
References: <20201022202355.3529836-1-samitolvanen@google.com>
 <X7QJ3PbYm4kxGAEt@trantor>
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On Tue, Nov 17, 2020 at 05:35:24PM +0000, Catalin Marinas wrote:
> On Thu, Oct 22, 2020 at 01:23:53PM -0700, Sami Tolvanen wrote:
> > As discussed a few months ago [1][2], virtually mapped shadow call stacks
> > are better for safety and robustness. This series dusts off the VMAP
> > option from the original SCS patch series and switches the kernel to use
> > virtually mapped shadow stacks unconditionally when SCS is enabled.
> > 
> >  [1] https://lore.kernel.org/lkml/20200515172355.GD23334@willie-the-truck/
> >  [2] https://lore.kernel.org/lkml/20200427220942.GB80713@google.com/
> > 
> > 
> > Sami Tolvanen (2):
> >   scs: switch to vmapped shadow stacks
> >   arm64: scs: use vmapped IRQ and SDEI shadow stacks
> 
> Will, Mark. Any objections to this series? If not, I can queue it for
> 5.11 via the arm64 tree.

It's on my list to review, but I have a tonne of other things I have to get
to first.

Will