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From: Oliver Upton <oliver.upton@linux.dev>
To: Will Deacon <will@kernel.org>
Cc: kvmarm@lists.cs.columbia.edu, Ard Biesheuvel <ardb@kernel.org>,
	Sean Christopherson <seanjc@google.com>,
	Alexandru Elisei <alexandru.elisei@arm.com>,
	Andy Lutomirski <luto@amacapital.net>,
	Catalin Marinas <catalin.marinas@arm.com>,
	James Morse <james.morse@arm.com>,
	Chao Peng <chao.p.peng@linux.intel.com>,
	Quentin Perret <qperret@google.com>,
	Suzuki K Poulose <suzuki.poulose@arm.com>,
	Michael Roth <michael.roth@amd.com>,
	Mark Rutland <mark.rutland@arm.com>,
	Fuad Tabba <tabba@google.com>, Marc Zyngier <maz@kernel.org>,
	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
Date: Wed, 20 Jul 2022 15:11:04 +0000	[thread overview]
Message-ID: <YtgbCEOMze8N4TPW@google.com> (raw)
In-Reply-To: <20220630135747.26983-7-will@kernel.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 <will@kernel.org>
> ---
>  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

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  reply	other threads:[~2022-07-20 15:12 UTC|newest]

Thread overview: 45+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-06-30 13:57 [PATCH v2 00/24] KVM: arm64: Introduce pKVM shadow state at EL2 Will Deacon
2022-06-30 13:57 ` [PATCH v2 01/24] KVM: arm64: Move hyp refcount manipulation helpers Will Deacon
2022-06-30 13:57 ` [PATCH v2 02/24] KVM: arm64: Allow non-coalescable pages in a hyp_pool Will Deacon
2022-06-30 13:57 ` [PATCH v2 03/24] KVM: arm64: Add flags to struct hyp_page Will Deacon
2022-07-18 10:54   ` Vincent Donnefort
2022-07-18 10:57     ` Vincent Donnefort
2022-06-30 13:57 ` [PATCH v2 04/24] KVM: arm64: Back hyp_vmemmap for all of memory Will Deacon
2022-06-30 13:57 ` [PATCH v2 05/24] KVM: arm64: Make hyp stage-1 refcnt correct on the whole range Will Deacon
2022-06-30 13:57 ` [PATCH v2 06/24] KVM: arm64: Unify identifiers used to distinguish host and hypervisor Will Deacon
2022-07-20 15:11   ` Oliver Upton [this message]
2022-07-20 18:14     ` Will Deacon
2022-07-29 19:28       ` Oliver Upton
2022-06-30 13:57 ` [PATCH v2 07/24] KVM: arm64: Implement do_donate() helper for donating memory Will Deacon
2022-06-30 13:57 ` [PATCH v2 08/24] KVM: arm64: Prevent the donation of no-map pages Will Deacon
2022-06-30 13:57 ` [PATCH v2 09/24] KVM: arm64: Add helpers to pin memory shared with hyp Will Deacon
2022-06-30 13:57 ` [PATCH v2 10/24] KVM: arm64: Include asm/kvm_mmu.h in nvhe/mem_protect.h Will Deacon
2022-06-30 13:57 ` [PATCH v2 11/24] KVM: arm64: Add hyp_spinlock_t static initializer Will Deacon
2022-06-30 13:57 ` [PATCH v2 12/24] KVM: arm64: Introduce shadow VM state at EL2 Will Deacon
2022-07-18 18:40   ` Vincent Donnefort
2022-07-19  9:41     ` Marc Zyngier
2022-07-20 18:20     ` Will Deacon
2022-06-30 13:57 ` [PATCH v2 13/24] KVM: arm64: Instantiate VM shadow data from EL1 Will Deacon
2022-06-30 13:57 ` [PATCH v2 14/24] KVM: arm64: Add pcpu fixmap infrastructure at EL2 Will Deacon
2022-07-19 13:30   ` Vincent Donnefort
2022-07-19 14:09     ` Quentin Perret
2022-07-19 14:10       ` Quentin Perret
2022-06-30 13:57 ` [PATCH v2 15/24] KVM: arm64: Initialise hyp symbols regardless of pKVM Will Deacon
2022-06-30 13:57 ` [PATCH v2 16/24] KVM: arm64: Provide I-cache invalidation by VA at EL2 Will Deacon
2022-06-30 13:57 ` [PATCH v2 17/24] KVM: arm64: Add generic hyp_memcache helpers Will Deacon
2022-06-30 13:57 ` [PATCH v2 18/24] KVM: arm64: Instantiate guest stage-2 page-tables at EL2 Will Deacon
2022-07-19 13:32   ` Vincent Donnefort
2022-07-20 18:26     ` Will Deacon
2022-06-30 13:57 ` [PATCH v2 19/24] KVM: arm64: Return guest memory from EL2 via dedicated teardown memcache Will Deacon
2022-06-30 13:57 ` [PATCH v2 20/24] KVM: arm64: Unmap kvm_arm_hyp_percpu_base from the host Will Deacon
2022-06-30 13:57 ` [PATCH v2 21/24] KVM: arm64: Maintain a copy of 'kvm_arm_vmid_bits' at EL2 Will Deacon
2022-06-30 13:57 ` [PATCH v2 22/24] KVM: arm64: Explicitly map kvm_vgic_global_state " Will Deacon
2022-06-30 13:57 ` [PATCH v2 23/24] KVM: arm64: Don't map host sections in pkvm Will Deacon
2022-06-30 13:57 ` [RFC PATCH v2 24/24] KVM: arm64: Use the shadow vCPU structure in handle___kvm_vcpu_run() Will Deacon
2022-07-06 19:17 ` [PATCH v2 00/24] KVM: arm64: Introduce pKVM shadow state at EL2 Sean Christopherson
2022-07-08 16:23   ` Will Deacon
2022-07-19 16:11     ` Sean Christopherson
2022-07-20  9:25       ` Marc Zyngier
2022-07-20 18:48       ` Will Deacon
2022-07-20 21:17         ` Sean Christopherson
2022-07-19 14:24 ` Vincent Donnefort

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