On Tue, Dec 1, 2020 at 3:40 AM Will Deacon [off-list ref] wrote:

On Mon, 30 Nov 2020 15:34:40 -0800, Sami Tolvanen wrote:

quoted

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/ (local)
 [2] https://lore.kernel.org/lkml/20200427220942.GB80713@google.com/ (local)

[...]

Applied to arm64 (for-next/scs), thanks!

[1/2] scs: switch to vmapped shadow stacks
      https://git.kernel.org/arm64/c/a2abe7cbd8fe
[2/2] arm64: scs: use vmapped IRQ and SDEI shadow stacks
      https://git.kernel.org/arm64/c/ac20ffbb0279

I also threw a patch on top implementing the suggestion I made on v2, so
please take a look if you get a chance.

Looks good to me, thanks for cleaning that up!

Sami

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