From: Oliver Upton <oliver.upton@linux.dev>
To: Will Deacon <will@kernel.org>
Cc: kvmarm@lists.linux.dev, "Sean Christopherson" <seanjc@google.com>,
"Vincent Donnefort" <vdonnefort@google.com>,
"Alexandru Elisei" <alexandru.elisei@arm.com>,
"Catalin Marinas" <catalin.marinas@arm.com>,
"Philippe Mathieu-Daudé" <philmd@linaro.org>,
"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>,
"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 v5 04/25] KVM: arm64: Fix-up hyp stage-1 refcounts for all pages mapped at EL2
Date: Fri, 28 Oct 2022 00:31:31 +0000 [thread overview]
Message-ID: <Y1si442I6GsEmwz1@google.com> (raw)
In-Reply-To: <20221020133827.5541-5-will@kernel.org>
On Thu, Oct 20, 2022 at 02:38:06PM +0100, Will Deacon wrote:
> From: Quentin Perret <qperret@google.com>
>
> In order to allow unmapping arbitrary memory pages from the hypervisor
> stage-1 page-table, fix-up the initial refcount for pages that have been
> mapped before the 'vmemmap' array was up and running so that it
> accurately accounts for all existing hypervisor mappings.
>
> This is achieved by traversing the entire hypervisor stage-1 page-table
> during initialisation of EL2 and updating the corresponding
> 'struct hyp_page' for each valid mapping.
>
> Tested-by: Vincent Donnefort <vdonnefort@google.com>
> Signed-off-by: Quentin Perret <qperret@google.com>
> Signed-off-by: Will Deacon <will@kernel.org>
Reviewed-by: Oliver Upton <oliver.upton@linux.dev>
--
Thanks,
Oliver
WARNING: multiple messages have this Message-ID (diff)
From: Oliver Upton <oliver.upton@linux.dev>
To: Will Deacon <will@kernel.org>
Cc: kvmarm@lists.linux.dev, "Sean Christopherson" <seanjc@google.com>,
"Vincent Donnefort" <vdonnefort@google.com>,
"Alexandru Elisei" <alexandru.elisei@arm.com>,
"Catalin Marinas" <catalin.marinas@arm.com>,
"Philippe Mathieu-Daudé" <philmd@linaro.org>,
"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>,
"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 v5 04/25] KVM: arm64: Fix-up hyp stage-1 refcounts for all pages mapped at EL2
Date: Fri, 28 Oct 2022 00:31:31 +0000 [thread overview]
Message-ID: <Y1si442I6GsEmwz1@google.com> (raw)
In-Reply-To: <20221020133827.5541-5-will@kernel.org>
On Thu, Oct 20, 2022 at 02:38:06PM +0100, Will Deacon wrote:
> From: Quentin Perret <qperret@google.com>
>
> In order to allow unmapping arbitrary memory pages from the hypervisor
> stage-1 page-table, fix-up the initial refcount for pages that have been
> mapped before the 'vmemmap' array was up and running so that it
> accurately accounts for all existing hypervisor mappings.
>
> This is achieved by traversing the entire hypervisor stage-1 page-table
> during initialisation of EL2 and updating the corresponding
> 'struct hyp_page' for each valid mapping.
>
> Tested-by: Vincent Donnefort <vdonnefort@google.com>
> Signed-off-by: Quentin Perret <qperret@google.com>
> Signed-off-by: Will Deacon <will@kernel.org>
Reviewed-by: Oliver Upton <oliver.upton@linux.dev>
--
Thanks,
Oliver
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next prev parent reply other threads:[~2022-10-28 0:31 UTC|newest]
Thread overview: 70+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-10-20 13:38 [PATCH v5 00/25] KVM: arm64: Introduce pKVM hyp VM and vCPU state at EL2 Will Deacon
2022-10-20 13:38 ` Will Deacon
2022-10-20 13:38 ` [PATCH v5 01/25] KVM: arm64: Move hyp refcount manipulation helpers to common header file Will Deacon
2022-10-20 13:38 ` Will Deacon
2022-10-20 13:38 ` [PATCH v5 02/25] KVM: arm64: Allow attaching of non-coalescable pages to a hyp pool Will Deacon
2022-10-20 13:38 ` Will Deacon
2022-10-28 0:17 ` Oliver Upton
2022-10-28 0:17 ` Oliver Upton
2022-10-28 8:09 ` Oliver Upton
2022-10-28 8:09 ` Oliver Upton
2022-10-28 9:29 ` Quentin Perret
2022-10-28 9:29 ` Quentin Perret
2022-10-28 9:28 ` Quentin Perret
2022-10-28 9:28 ` Quentin Perret
2022-10-20 13:38 ` [PATCH v5 03/25] KVM: arm64: Back the hypervisor 'struct hyp_page' array for all memory Will Deacon
2022-10-20 13:38 ` Will Deacon
2022-10-20 13:38 ` [PATCH v5 04/25] KVM: arm64: Fix-up hyp stage-1 refcounts for all pages mapped at EL2 Will Deacon
2022-10-20 13:38 ` Will Deacon
2022-10-28 0:31 ` Oliver Upton [this message]
2022-10-28 0:31 ` Oliver Upton
2022-10-20 13:38 ` [PATCH v5 05/25] KVM: arm64: Unify identifiers used to distinguish host and hypervisor Will Deacon
2022-10-20 13:38 ` Will Deacon
2022-10-28 0:32 ` Oliver Upton
2022-10-28 0:32 ` Oliver Upton
2022-10-20 13:38 ` [PATCH v5 06/25] KVM: arm64: Implement do_donate() helper for donating memory Will Deacon
2022-10-20 13:38 ` Will Deacon
2022-10-28 7:52 ` Oliver Upton
2022-10-28 7:52 ` Oliver Upton
2022-10-28 10:01 ` Quentin Perret
2022-10-28 10:01 ` Quentin Perret
2022-10-20 13:38 ` [PATCH v5 07/25] KVM: arm64: Prevent the donation of no-map pages Will Deacon
2022-10-20 13:38 ` Will Deacon
2022-10-20 13:38 ` [PATCH v5 08/25] KVM: arm64: Add helpers to pin memory shared with the hypervisor at EL2 Will Deacon
2022-10-20 13:38 ` Will Deacon
2022-10-20 13:38 ` [PATCH v5 09/25] KVM: arm64: Include asm/kvm_mmu.h in nvhe/mem_protect.h Will Deacon
2022-10-20 13:38 ` Will Deacon
2022-10-20 13:38 ` [PATCH v5 10/25] KVM: arm64: Add hyp_spinlock_t static initializer Will Deacon
2022-10-20 13:38 ` Will Deacon
2022-10-20 13:38 ` [PATCH v5 11/25] KVM: arm64: Rename 'host_kvm' to 'host_mmu' Will Deacon
2022-10-20 13:38 ` Will Deacon
2022-10-20 13:38 ` [PATCH v5 12/25] KVM: arm64: Add infrastructure to create and track pKVM instances at EL2 Will Deacon
2022-10-20 13:38 ` Will Deacon
2022-10-20 13:38 ` [PATCH v5 13/25] KVM: arm64: Instantiate pKVM hypervisor VM and vCPU structures from EL1 Will Deacon
2022-10-20 13:38 ` Will Deacon
2022-10-20 13:38 ` [PATCH v5 14/25] KVM: arm64: Add per-cpu fixmap infrastructure at EL2 Will Deacon
2022-10-20 13:38 ` Will Deacon
2022-10-20 13:38 ` [PATCH v5 15/25] KVM: arm64: Initialise hypervisor copies of host symbols unconditionally Will Deacon
2022-10-20 13:38 ` Will Deacon
2022-10-20 13:38 ` [PATCH v5 16/25] KVM: arm64: Provide I-cache invalidation by virtual address at EL2 Will Deacon
2022-10-20 13:38 ` Will Deacon
2022-10-20 13:38 ` [PATCH v5 17/25] KVM: arm64: Add generic hyp_memcache helpers Will Deacon
2022-10-20 13:38 ` Will Deacon
2022-10-20 13:38 ` [PATCH v5 18/25] KVM: arm64: Consolidate stage-2 initialisation into a single function Will Deacon
2022-10-20 13:38 ` Will Deacon
2022-10-20 13:38 ` [PATCH v5 19/25] KVM: arm64: Instantiate guest stage-2 page-tables at EL2 Will Deacon
2022-10-20 13:38 ` Will Deacon
2022-10-20 13:38 ` [PATCH v5 20/25] KVM: arm64: Return guest memory from EL2 via dedicated teardown memcache Will Deacon
2022-10-20 13:38 ` Will Deacon
2022-10-27 13:13 ` Quentin Perret
2022-10-27 13:13 ` Quentin Perret
2022-10-20 13:38 ` [PATCH v5 21/25] KVM: arm64: Unmap 'kvm_arm_hyp_percpu_base' from the host Will Deacon
2022-10-20 13:38 ` Will Deacon
2022-10-20 13:38 ` [PATCH v5 22/25] KVM: arm64: Maintain a copy of 'kvm_arm_vmid_bits' at EL2 Will Deacon
2022-10-20 13:38 ` Will Deacon
2022-10-20 13:38 ` [PATCH v5 23/25] KVM: arm64: Explicitly map 'kvm_vgic_global_state' " Will Deacon
2022-10-20 13:38 ` Will Deacon
2022-10-20 13:38 ` [PATCH v5 24/25] KVM: arm64: Don't unnecessarily map host kernel sections " Will Deacon
2022-10-20 13:38 ` Will Deacon
2022-10-20 13:38 ` [RFC PATCH v5 25/25] KVM: arm64: Use the pKVM hyp vCPU structure in handle___kvm_vcpu_run() Will Deacon
2022-10-20 13:38 ` Will Deacon
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