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Fri, 30 Aug 2024 12:58:58 +0100 Date: Fri, 30 Aug 2024 12:58:57 +0100 Message-ID: <86a5guw7b2.wl-maz@kernel.org> From: Marc Zyngier To: Will Deacon Cc: Joey Gouly , linux-arm-kernel@lists.infradead.org, nd@arm.com, akpm@linux-foundation.org, aneesh.kumar@kernel.org, aneesh.kumar@linux.ibm.com, anshuman.khandual@arm.com, bp@alien8.de, broonie@kernel.org, catalin.marinas@arm.com, christophe.leroy@csgroup.eu, dave.hansen@linux.intel.com, hpa@zytor.com, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linuxppc-dev@lists.ozlabs.org, mingo@redhat.com, mpe@ellerman.id.au, naveen.n.rao@linux.ibm.com, npiggin@gmail.com, oliver.upton@linux.dev, shuah@kernel.org, skhan@linuxfoundation.org, szabolcs.nagy@arm.com, tglx@linutronix.de, x86@kernel.org, kvmarm@lists.linux.dev, linux-kselftest@vger.kernel.org Subject: Re: [PATCH v5 08/30] KVM: arm64: make kvm_at() take an OP_AT_* In-Reply-To: <20240830090522.GA7678@willie-the-truck> References: <20240822151113.1479789-1-joey.gouly@arm.com> <20240822151113.1479789-9-joey.gouly@arm.com> <20240823134811.GG32156@willie-the-truck> <86cylqwib5.wl-maz@kernel.org> <20240830090522.GA7678@willie-the-truck> User-Agent: Wanderlust/2.15.9 (Almost Unreal) SEMI-EPG/1.14.7 (Harue) FLIM-LB/1.14.9 (=?UTF-8?B?R29qxY0=?=) APEL-LB/10.8 EasyPG/1.0.0 Emacs/29.4 (aarch64-unknown-linux-gnu) MULE/6.0 (HANACHIRUSATO) Precedence: bulk X-Mailing-List: linux-fsdevel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 (generated by SEMI-EPG 1.14.7 - "Harue") Content-Type: text/plain; charset=US-ASCII X-SA-Exim-Connect-IP: 185.219.108.64 X-SA-Exim-Rcpt-To: will@kernel.org, joey.gouly@arm.com, linux-arm-kernel@lists.infradead.org, nd@arm.com, akpm@linux-foundation.org, aneesh.kumar@kernel.org, aneesh.kumar@linux.ibm.com, anshuman.khandual@arm.com, bp@alien8.de, broonie@kernel.org, catalin.marinas@arm.com, christophe.leroy@csgroup.eu, dave.hansen@linux.intel.com, hpa@zytor.com, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linuxppc-dev@lists.ozlabs.org, mingo@redhat.com, mpe@ellerman.id.au, naveen.n.rao@linux.ibm.com, npiggin@gmail.com, oliver.upton@linux.dev, shuah@kernel.org, skhan@linuxfoundation.org, szabolcs.nagy@arm.com, tglx@linutronix.de, x86@kernel.org, kvmarm@lists.linux.dev, linux-kselftest@vger.kernel.org X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false On Fri, 30 Aug 2024 10:05:22 +0100, Will Deacon wrote: > > Hey Marc, > > On Fri, Aug 30, 2024 at 09:01:18AM +0100, Marc Zyngier wrote: > > On Fri, 23 Aug 2024 14:48:11 +0100, > > Will Deacon wrote: > > > > > > On Thu, Aug 22, 2024 at 04:10:51PM +0100, Joey Gouly wrote: > > > > To allow using newer instructions that current assemblers don't know about, > > > > replace the `at` instruction with the underlying SYS instruction. > > > > > > > > Signed-off-by: Joey Gouly > > > > Cc: Marc Zyngier > > > > Cc: Oliver Upton > > > > Cc: Catalin Marinas > > > > Cc: Will Deacon > > > > Reviewed-by: Marc Zyngier > > > > --- > > > > arch/arm64/include/asm/kvm_asm.h | 3 ++- > > > > arch/arm64/kvm/hyp/include/hyp/fault.h | 2 +- > > > > 2 files changed, 3 insertions(+), 2 deletions(-) > > > > > > Marc -- what would you like to do with this patch? I think the POE series > > > is really close now, so ideally I'd queue the lot on a branch in arm64 > > > and you could pull the first ~10 patches into kvmarm if you need 'em. > > > > > > Would what work for you, or did you have something else in mind (since > > > this one is also included in your series adding nv support for AT). > > > > Is there any progress on this front? I am quite eager to queue the AT > > series, but the dependency on this patch is preventing me to do so. > > > > I can see there are outstanding questions on the POE series, so I was > > wondering if we should consider reversing the dependency: I can create > > a stable branch with this single patch, which you can pull as a prefix > > of the POE series. > > That sounds like a good idea. The uaccess discussion seems to have > stalled and I don't really want to merge the series without concluding > that. > > So please go ahead with this single patch and I'll pull it in if things > start moving again. Now pushed to [1]. Thanks, M. [1] https://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm.git/log/?h=arm64-shared-6.12 -- Without deviation from the norm, progress is not possible.