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Tue, 1 Sep 2020 11:02:46 -0400 (EDT) Date: Tue, 1 Sep 2020 17:03:14 +0200 From: Greg KH To: =?iso-8859-1?Q?Andr=E9?= Przywara Cc: Marc Zyngier , stable@vger.kernel.org, James Morse , Catalin Marinas Subject: Re: [PATCH stable v5.4 1/3] KVM: arm64: Add kvm_extable for vaxoricism code Message-ID: <20200901150314.GA1317670@kroah.com> References: <20200901094923.52486-1-andre.przywara@arm.com> <20200901094923.52486-2-andre.przywara@arm.com> <79d6944d383945608b685a2d0f9d9b2c@kernel.org> <746764b0-7d63-b154-df02-7ca64a36ffcd@arm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <746764b0-7d63-b154-df02-7ca64a36ffcd@arm.com> Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org On Tue, Sep 01, 2020 at 12:17:54PM +0100, André Przywara wrote: > On 01/09/2020 12:12, Marc Zyngier wrote: > > Hi Andre, > > > > On 2020-09-01 10:49, Andre Przywara wrote: > >> From: James Morse > >> > >> commit e9ee186bb735bfc17fa81dbc9aebf268aee5b41e upstream. > >> > >> KVM has a one instruction window where it will allow an SError exception > >> to be consumed by the hypervisor without treating it as a hypervisor bug. > >> This is used to consume asynchronous external abort that were caused by > >> the guest. > >> > >> As we are about to add another location that survives unexpected > >> exceptions, > >> generalise this code to make it behave like the host's extable. > >> > >> KVM's version has to be mapped to EL2 to be accessible on nVHE systems. > >> > >> The SError vaxorcism code is a one instruction window, so has two entries > >> in the extable. Because the KVM code is copied for VHE and nVHE, we > >> end up > >> with four entries, half of which correspond with code that isn't mapped. > >> > >> Cc: # 5.4.x > >> Cc: Marc Zyngier > >> Signed-off-by: James Morse > >> Signed-off-by: Andre Przywara > > > > Can you make sure these patches do carry the sign-off chain as we have > > in mainline? In particular, this is missing: > > > >     Reviewed-by: Marc Zyngier > >     Signed-off-by: Catalin Marinas > > > > You can add your own SoB after this. > > Sure, I wasn't sure your review would apply to this version as well. I > took the backports from James' kernel.org repo, where they were lacking > any of those tags. > So shall I copy all the tags from mainline to all backport versions? Yes. thanks, greg k-h