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From: Oliver Upton To: Will Deacon Cc: kvmarm@lists.cs.columbia.edu, Ard Biesheuvel , Sean Christopherson , Alexandru Elisei , Andy Lutomirski , Catalin Marinas , James Morse , Chao Peng , Quentin Perret , Suzuki K Poulose , Michael Roth , Mark Rutland , Fuad Tabba , Marc Zyngier , kernel-team@android.com, kvm@vger.kernel.org, linux-arm-kernel@lists.infradead.org Subject: Re: [PATCH v2 06/24] KVM: arm64: Unify identifiers used to distinguish host and hypervisor Message-ID: References: <20220630135747.26983-1-will@kernel.org> <20220630135747.26983-7-will@kernel.org> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20220630135747.26983-7-will@kernel.org> X-Migadu-Flow: FLOW_OUT X-Migadu-Auth-User: linux.dev X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220720_081114_872220_67B5714F X-CRM114-Status: GOOD ( 19.02 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Hi Will, On Thu, Jun 30, 2022 at 02:57:29PM +0100, Will Deacon wrote: > The 'pkvm_component_id' enum type provides constants to refer to the > host and the hypervisor, yet this information is duplicated by the > 'pkvm_hyp_id' constant. > > Remove the definition of 'pkvm_hyp_id' and move the 'pkvm_component_id' > type definition to 'mem_protect.h' so that it can be used outside of > the memory protection code. > > Signed-off-by: Will Deacon > --- > arch/arm64/kvm/hyp/include/nvhe/mem_protect.h | 6 +++++- > arch/arm64/kvm/hyp/nvhe/mem_protect.c | 8 -------- > arch/arm64/kvm/hyp/nvhe/setup.c | 2 +- > 3 files changed, 6 insertions(+), 10 deletions(-) > > diff --git a/arch/arm64/kvm/hyp/include/nvhe/mem_protect.h b/arch/arm64/kvm/hyp/include/nvhe/mem_protect.h > index 80e99836eac7..f5705a1e972f 100644 > --- a/arch/arm64/kvm/hyp/include/nvhe/mem_protect.h > +++ b/arch/arm64/kvm/hyp/include/nvhe/mem_protect.h > @@ -51,7 +51,11 @@ struct host_kvm { > }; > extern struct host_kvm host_kvm; > > -extern const u8 pkvm_hyp_id; > +/* This corresponds to page-table locking order */ > +enum pkvm_component_id { > + PKVM_ID_HOST, > + PKVM_ID_HYP, > +}; Since we have the concept of PTE ownership in pgtable.c, WDYT about moving the owner ID enumeration there? KVM_MAX_OWNER_ID should be incorporated in the enum too. -- Thanks, Oliver _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel