Date: Tue, 22 Oct 2019 07:54:07 +0200 From: Ard Biesheuvel <ard.biesheuvel@...aro.org> To: Sami Tolvanen <samitolvanen@...gle.com> Cc: Will Deacon <will@...nel.org>, Catalin Marinas <catalin.marinas@....com>, Steven Rostedt <rostedt@...dmis.org>, Dave Martin <Dave.Martin@....com>, Kees Cook <keescook@...omium.org>, Laura Abbott <labbott@...hat.com>, Mark Rutland <mark.rutland@....com>, Nick Desaulniers <ndesaulniers@...gle.com>, clang-built-linux <clang-built-linux@...glegroups.com>, Kernel Hardening <kernel-hardening@...ts.openwall.com>, linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>, Linux Kernel Mailing List <linux-kernel@...r.kernel.org> Subject: Re: [PATCH 14/18] arm64: efi: restore x18 if it was corrupted On Tue, 22 Oct 2019 at 00:40, Sami Tolvanen <samitolvanen@...gle.com> wrote: > > On Sun, Oct 20, 2019 at 11:20 PM Ard Biesheuvel > <ard.biesheuvel@...aro.org> 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? > No concerns, but we should put the above clarification in the commit log.
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