Hi Marc,
I think you are the author. I'm just making some minor fixes and then upstreaming to the mailing list. What is the correct way to make the Signed-off-by list?
Yours, Paul
On Wed, 8 Feb 2023 at 00:35, Marc Zyngier maz@kernel.org wrote:
On 2023-02-07 16:20, Ying-Chun Liu (PaulLiu) wrote:
Exposing set/way cache maintenance to a virtual machine is unsafe, not least because the instructions are not permission-checked but also because they are not broadcast between CPUs. Consequently, KVM traps and emulates such maintenance in the host kernel using by-VA operations and looping over the stage-2 page-tables. However, when running under protected KVM, these instructions are not able to be emulated and will instead result in an exception being delivered to the guest.
Introduce CONFIG_CMO_BY_VA_ONLY so that virtual platforms can select this option and perform by-VA cache maintenance instead of using the set/way instructions.
Signed-off-by: Ying-Chun Liu (PaulLiu) paul.liu@linaro.org Signed-off-by: Marc Zyngier maz@kernel.org Signed-off-by: Will Deacon willdeacon@google.com Cc: Tom Rini trini@konsulko.com
The sign-off chain looks pretty odd. Either you are the author of this patch, and I have nothing to do on the sign-off list, or I'm the author and the authorship is wrong. Similar things would apply for Will.
So which one is it?
M.-- Jazz is not dead. It just smells funny...