Messages in this thread | | | Subject | Re: [PATCH v4 03/17] arm64: kvm: stop treating register x18 as caller save | Date | Mon, 04 Nov 2019 12:13:00 +0109 | From | Marc Zyngier <> |
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Hi Sami,
On 2019-11-01 23:20, Sami Tolvanen wrote: > From: Ard Biesheuvel <ard.biesheuvel@linaro.org> > > In preparation of reserving x18, stop treating it as caller save in > the KVM guest entry/exit code. Currently, the code assumes there is > no need to preserve it for the host, given that it would have been > assumed clobbered anyway by the function call to __guest_enter(). > Instead, preserve its value and restore it upon return. > > Link: https://patchwork.kernel.org/patch/9836891/ > Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> > [Sami: updated commit message, switched from x18 to x29 for the guest > context] > Signed-off-by: Sami Tolvanen <samitolvanen@google.com> > Reviewed-by: Kees Cook <keescook@chromium.org>
If you intend for this to be merged via the arm64 tree, please add my
Reviewed-by: Marc Zyngier <marc.zyngier@arm.com>
Thanks,
M. -- Jazz is not dead. It just smells funny...
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