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Date: Mon, 21 Oct 2019 15:39:50 -0700
From: Sami Tolvanen <>
To: Ard Biesheuvel <>
Cc: Will Deacon <>, Catalin Marinas <>, 
	Steven Rostedt <>, Dave Martin <>, 
	Kees Cook <>, Laura Abbott <>, 
	Mark Rutland <>, Nick Desaulniers <>, 
	clang-built-linux <>, 
	Kernel Hardening <>, 
	linux-arm-kernel <>, 
	Linux Kernel Mailing List <>
Subject: Re: [PATCH 14/18] arm64: efi: restore x18 if it was corrupted

On Sun, Oct 20, 2019 at 11:20 PM Ard Biesheuvel
<> wrote:
> You'll have to elaborate a bit here and explain that this is
> sufficient, given that we run EFI runtime services with interrupts
> enabled.

I can add a note about this in v2. This is called with preemption
disabled and we have a separate interrupt shadow stack, so as far as I
can tell, this should be sufficient. Did you have concerns about this?


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