From: Peter Maydell <peter.maydell@linaro.org>
To: Suzuki K Poulose <suzuki.poulose@arm.com>
Cc: arm-mail-list <linux-arm-kernel@lists.infradead.org>,
kvmarm@lists.cs.columbia.edu, kvm-devel <kvm@vger.kernel.org>,
"Marc Zyngier" <marc.zyngier@arm.com>,
"Christoffer Dall" <cdall@kernel.org>,
"Eric Auger" <eric.auger@redhat.com>,
"Paolo Bonzini" <pbonzini@redhat.com>,
"Radim Krčmář" <rkrcmar@redhat.com>,
"Will Deacon" <will.deacon@arm.com>,
"Catalin Marinas" <catalin.marinas@arm.com>,
"James Morse" <james.morse@arm.com>,
"Dave P Martin" <dave.martin@arm.com>,
julien.grall@arm.com,
"lkml - Kernel Mailing List" <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH v5 18/18] kvm: arm64: Allow tuning the physical address size for VM
Date: Mon, 17 Sep 2018 15:20:15 +0100 [thread overview]
Message-ID: <CAFEAcA-AKpkzSpMofMFxxf5XdYPii3PTB8xXDAvmyFWno7nZeA@mail.gmail.com> (raw)
In-Reply-To: <20180917104144.19188-19-suzuki.poulose@arm.com>
On 17 September 2018 at 11:41, Suzuki K Poulose <suzuki.poulose@arm.com> wrote:
> Allow specifying the physical address size limit for a new
> VM via the kvm_type argument for the KVM_CREATE_VM ioctl. This
> allows us to finalise the stage2 page table as early as possible
> and hence perform the right checks on the memory slots
> without complication. The size is ecnoded as Log2(PA_Size) in
> bits[7:0] of the type field. For backward compatibility the
> value 0 is reserved and implies 40bits. Also, lift the limit
> of the IPA to host limit and allow lower IPA sizes (e.g, 32).
>
> The userspace could check the extension KVM_CAP_ARM_VM_PHYS_SHIFT
> for the availability of this feature. The cap check returns the
> maximum limit for the physical address shift supported by the host.
>
> Cc: Marc Zyngier <marc.zyngier@arm.com>
> Cc: Christoffer Dall <cdall@kernel.org>
> Cc: Peter Maydel <peter.maydell@linaro.org>
Typo: my surname has two "l"s in it.
thanks
-- PMM
WARNING: multiple messages have this Message-ID (diff)
From: peter.maydell@linaro.org (Peter Maydell)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v5 18/18] kvm: arm64: Allow tuning the physical address size for VM
Date: Mon, 17 Sep 2018 15:20:15 +0100 [thread overview]
Message-ID: <CAFEAcA-AKpkzSpMofMFxxf5XdYPii3PTB8xXDAvmyFWno7nZeA@mail.gmail.com> (raw)
In-Reply-To: <20180917104144.19188-19-suzuki.poulose@arm.com>
On 17 September 2018 at 11:41, Suzuki K Poulose <suzuki.poulose@arm.com> wrote:
> Allow specifying the physical address size limit for a new
> VM via the kvm_type argument for the KVM_CREATE_VM ioctl. This
> allows us to finalise the stage2 page table as early as possible
> and hence perform the right checks on the memory slots
> without complication. The size is ecnoded as Log2(PA_Size) in
> bits[7:0] of the type field. For backward compatibility the
> value 0 is reserved and implies 40bits. Also, lift the limit
> of the IPA to host limit and allow lower IPA sizes (e.g, 32).
>
> The userspace could check the extension KVM_CAP_ARM_VM_PHYS_SHIFT
> for the availability of this feature. The cap check returns the
> maximum limit for the physical address shift supported by the host.
>
> Cc: Marc Zyngier <marc.zyngier@arm.com>
> Cc: Christoffer Dall <cdall@kernel.org>
> Cc: Peter Maydel <peter.maydell@linaro.org>
Typo: my surname has two "l"s in it.
thanks
-- PMM
next prev parent reply other threads:[~2018-09-17 14:20 UTC|newest]
Thread overview: 120+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-09-17 10:41 [PATCH v5 00/18] kvm: arm64: Dynamic IPA and 52bit IPA Suzuki K Poulose
2018-09-17 10:41 ` Suzuki K Poulose
2018-09-17 10:41 ` [PATCH v5 01/18] kvm: arm/arm64: Fix stage2_flush_memslot for 4 level page table Suzuki K Poulose
2018-09-17 10:41 ` Suzuki K Poulose
2018-09-17 10:41 ` [PATCH v5 02/18] kvm: arm/arm64: Remove spurious WARN_ON Suzuki K Poulose
2018-09-17 10:41 ` Suzuki K Poulose
2018-09-17 10:41 ` Suzuki K Poulose
2018-09-17 10:41 ` [PATCH v5 03/18] kvm: arm64: Add helper for loading the stage2 setting for a VM Suzuki K Poulose
2018-09-17 10:41 ` Suzuki K Poulose
2018-09-17 10:41 ` Suzuki K Poulose
2018-09-17 10:41 ` [PATCH v5 04/18] arm64: Add a helper for PARange to physical shift conversion Suzuki K Poulose
2018-09-17 10:41 ` Suzuki K Poulose
2018-09-17 10:41 ` [PATCH v5 05/18] kvm: arm64: Clean up VTCR_EL2 initialisation Suzuki K Poulose
2018-09-17 10:41 ` Suzuki K Poulose
2018-09-17 10:41 ` [PATCH v5 06/18] kvm: arm/arm64: Allow arch specific configurations for VM Suzuki K Poulose
2018-09-17 10:41 ` Suzuki K Poulose
2018-09-20 10:22 ` Auger Eric
2018-09-20 10:22 ` Auger Eric
2018-09-20 10:22 ` Auger Eric
2018-09-17 10:41 ` [PATCH v5 07/18] kvm: arm64: Configure VTCR_EL2 per VM Suzuki K Poulose
2018-09-17 10:41 ` Suzuki K Poulose
2018-09-17 10:41 ` Suzuki K Poulose
2018-09-20 10:21 ` Auger Eric
2018-09-20 10:21 ` Auger Eric
2018-09-20 10:38 ` Suzuki K Poulose
2018-09-20 10:38 ` Suzuki K Poulose
2018-09-20 10:38 ` Suzuki K Poulose
2018-09-17 10:41 ` [PATCH v5 08/18] kvm: arm/arm64: Prepare for VM specific stage2 translations Suzuki K Poulose
2018-09-17 10:41 ` Suzuki K Poulose
2018-09-20 14:07 ` Auger Eric
2018-09-20 14:07 ` Auger Eric
2018-09-20 14:07 ` Auger Eric
2018-09-17 10:41 ` [PATCH v5 09/18] kvm: arm64: Prepare for dynamic stage2 page table layout Suzuki K Poulose
2018-09-17 10:41 ` Suzuki K Poulose
2018-09-17 10:41 ` Suzuki K Poulose
2018-09-17 10:41 ` [PATCH v5 10/18] kvm: arm64: Make stage2 page table layout dynamic Suzuki K Poulose
2018-09-17 10:41 ` Suzuki K Poulose
2018-09-20 14:07 ` Auger Eric
2018-09-20 14:07 ` Auger Eric
2018-09-17 10:41 ` [PATCH v5 11/18] kvm: arm64: Dynamic configuration of VTTBR mask Suzuki K Poulose
2018-09-17 10:41 ` Suzuki K Poulose
2018-09-20 14:07 ` Auger Eric
2018-09-20 14:07 ` Auger Eric
2018-09-20 15:22 ` Suzuki K Poulose
2018-09-20 15:22 ` Suzuki K Poulose
2018-09-20 15:22 ` Suzuki K Poulose
2018-09-25 11:56 ` Auger Eric
2018-09-25 11:56 ` Auger Eric
2018-09-17 10:41 ` [PATCH v5 12/18] kvm: arm64: Configure VTCR_EL2.SL0 per VM Suzuki K Poulose
2018-09-17 10:41 ` Suzuki K Poulose
2018-09-20 14:25 ` Auger Eric
2018-09-20 14:25 ` Auger Eric
2018-09-20 15:25 ` Suzuki K Poulose
2018-09-20 15:25 ` Suzuki K Poulose
2018-09-20 15:25 ` Suzuki K Poulose
2018-09-17 10:41 ` [PATCH v5 13/18] kvm: arm64: Switch to per VM IPA limit Suzuki K Poulose
2018-09-17 10:41 ` Suzuki K Poulose
2018-09-17 10:41 ` [PATCH v5 14/18] vgic: Add support for 52bit guest physical address Suzuki K Poulose
2018-09-17 10:41 ` Suzuki K Poulose
2018-09-21 14:57 ` Auger Eric
2018-09-21 14:57 ` Auger Eric
2018-09-25 10:49 ` Suzuki K Poulose
2018-09-25 10:49 ` Suzuki K Poulose
2018-09-17 10:41 ` [PATCH v5 15/18] kvm: arm64: Add 52bit support for PAR to HPFAR conversoin Suzuki K Poulose
2018-09-17 10:41 ` Suzuki K Poulose
2018-09-17 10:41 ` Suzuki K Poulose
2018-09-25 9:59 ` Auger Eric
2018-09-25 9:59 ` Auger Eric
2018-09-17 10:41 ` [PATCH v5 16/18] kvm: arm64: Set a limit on the IPA size Suzuki K Poulose
2018-09-17 10:41 ` Suzuki K Poulose
2018-09-25 9:59 ` Auger Eric
2018-09-25 9:59 ` Auger Eric
2018-09-25 9:59 ` Auger Eric
2018-09-25 11:10 ` Suzuki K Poulose
2018-09-25 11:10 ` Suzuki K Poulose
2018-09-25 11:10 ` Suzuki K Poulose
2018-09-17 10:41 ` [PATCH v5 17/18] kvm: arm64: Limit the minimum number of page table levels Suzuki K Poulose
2018-09-17 10:41 ` Suzuki K Poulose
2018-09-25 10:00 ` Auger Eric
2018-09-25 10:00 ` Auger Eric
2018-09-25 10:25 ` Suzuki K Poulose
2018-09-25 10:25 ` Suzuki K Poulose
2018-09-17 10:41 ` [PATCH v5 18/18] kvm: arm64: Allow tuning the physical address size for VM Suzuki K Poulose
2018-09-17 10:41 ` Suzuki K Poulose
2018-09-17 14:20 ` Peter Maydell [this message]
2018-09-17 14:20 ` Peter Maydell
2018-09-17 14:43 ` Suzuki K Poulose
2018-09-17 14:43 ` Suzuki K Poulose
2018-09-18 1:55 ` Peter Maydell
2018-09-18 1:55 ` Peter Maydell
2018-09-18 1:55 ` Peter Maydell
2018-09-18 15:16 ` Suzuki K Poulose
2018-09-18 15:16 ` Suzuki K Poulose
2018-09-18 15:36 ` Peter Maydell
2018-09-18 15:36 ` Peter Maydell
2018-09-18 16:27 ` Suzuki K Poulose
2018-09-18 16:27 ` Suzuki K Poulose
2018-09-18 16:27 ` Suzuki K Poulose
2018-09-18 17:15 ` Peter Maydell
2018-09-18 17:15 ` Peter Maydell
2018-09-19 10:03 ` Suzuki K Poulose
2018-09-19 10:03 ` Suzuki K Poulose
2018-09-19 10:03 ` Suzuki K Poulose
2018-09-25 10:00 ` Auger Eric
2018-09-25 10:00 ` Auger Eric
2018-09-25 10:24 ` Suzuki K Poulose
2018-09-25 10:24 ` Suzuki K Poulose
2018-09-25 10:24 ` Suzuki K Poulose
2018-09-17 10:41 ` [kvmtool PATCH v5 19/18] kvmtool: Allow backends to run checks on the KVM device fd Suzuki K Poulose
2018-09-17 10:41 ` Suzuki K Poulose
2018-09-17 10:41 ` Suzuki K Poulose
2018-09-17 10:41 ` [kvmtool PATCH v5 20/18] kvmtool: arm64: Add support for guest physical address size Suzuki K Poulose
2018-09-17 10:41 ` Suzuki K Poulose
2018-09-17 10:41 ` Suzuki K Poulose
2018-09-17 10:41 ` [kvmtool PATCH v5 21/18] kvmtool: arm64: Switch memory layout Suzuki K Poulose
2018-09-17 10:41 ` Suzuki K Poulose
2018-09-17 10:41 ` Suzuki K Poulose
2018-09-17 10:41 ` [kvmtool PATCH v5 22/18] kvmtool: arm: Add support for creating VM with PA size Suzuki K Poulose
2018-09-17 10:41 ` Suzuki K Poulose
2018-09-17 10:41 ` Suzuki K Poulose
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