From: Suzuki K Poulose <suzuki.poulose@arm.com>
To: Auger Eric <eric.auger@redhat.com>, linux-arm-kernel@lists.infradead.org
Cc: kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org,
marc.zyngier@arm.com, cdall@kernel.org, pbonzini@redhat.com,
rkrcmar@redhat.com, will.deacon@arm.com, catalin.marinas@arm.com,
james.morse@arm.com, dave.martin@arm.com, julien.grall@arm.com,
linux-kernel@vger.kernel.org,
Kristina Martsenko <kristina.martsenko@arm.com>
Subject: Re: [PATCH v5 14/18] vgic: Add support for 52bit guest physical address
Date: Tue, 25 Sep 2018 11:49:19 +0100 [thread overview]
Message-ID: <79adfcd4-cab0-cc29-5c12-ffcad325be70@arm.com> (raw)
In-Reply-To: <e308a66d-c426-81c0-0c79-ce97773fa090@redhat.com>
Hi Eric
On 09/21/2018 03:57 PM, Auger Eric wrote:
> Hi Suzuki,
>
> On 9/17/18 12:41 PM, Suzuki K Poulose wrote:
>> From: Kristina Martsenko <kristina.martsenko@arm.com>
>>
>> Add support for handling 52bit guest physical address to the
>> VGIC layer. So far we have limited the guest physical address
>> to 48bits, by explicitly masking the upper bits. This patch
>> removes the restriction. We do not have to check if the host
>> supports 52bit as the gpa is always validated during an access.
>> (e.g, kvm_{read/write}_guest, kvm_is_visible_gfn()).
>> Also, the ITS table save-restore is also not affected with
>> the enhancement. The DTE entries already store the bits[51:8]
>> of the ITT_addr (with a 256byte alignment).
>>
>> Cc: Marc Zyngier <marc.zyngier@arm.com>
>> Cc: Christoffer Dall <cdall@kernel.org>
>> Signed-off-by: Kristina Martsenko <kristina.martsenko@arm.com>
>> [ Macro clean ups, fix PROPBASER and PENDBASER accesses ]
>> Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
>> ---
>> include/linux/irqchip/arm-gic-v3.h | 5 +++++
>> virt/kvm/arm/vgic/vgic-its.c | 36 +++++++++---------------------
>> virt/kvm/arm/vgic/vgic-mmio-v3.c | 2 --
>> 3 files changed, 15 insertions(+), 28 deletions(-)
>>
>> diff --git a/include/linux/irqchip/arm-gic-v3.h b/include/linux/irqchip/arm-gic-v3.h
>> index 8bdbb5f29494..e961f40992d7 100644
>> --- a/include/linux/irqchip/arm-gic-v3.h
>> +++ b/include/linux/irqchip/arm-gic-v3.h
>> @@ -357,6 +357,8 @@
>> #define GITS_CBASER_RaWaWt GIC_BASER_CACHEABILITY(GITS_CBASER, INNER, RaWaWt)
>> #define GITS_CBASER_RaWaWb GIC_BASER_CACHEABILITY(GITS_CBASER, INNER, RaWaWb)
>>
>> +#define GITS_CBASER_ADDRESS(cbaser) ((cbaser) & GENMASK_ULL(52, 12))
> nit GENMASK_ULL(51, 12), bit 52 is RES0
I will fix this.
>> diff --git a/virt/kvm/arm/vgic/vgic-mmio-v3.c b/virt/kvm/arm/vgic/vgic-mmio-v3.c
>> index a2a175b08b17..b3d1f0985117 100644
>> --- a/virt/kvm/arm/vgic/vgic-mmio-v3.c
>> +++ b/virt/kvm/arm/vgic/vgic-mmio-v3.c
>> @@ -364,7 +364,6 @@ static u64 vgic_sanitise_pendbaser(u64 reg)
>> vgic_sanitise_outer_an);
>>
>> reg &= ~PENDBASER_RES0_MASK;
>> - reg &= ~GENMASK_ULL(51, 48);
>>
>> return reg;
>> }
>> @@ -382,7 +381,6 @@ static u64 vgic_sanitise_propbaser(u64 reg)
>> vgic_sanitise_outer_cacheability);
>>
>> reg &= ~PROPBASER_RES0_MASK;
>> - reg &= ~GENMASK_ULL(51, 48);
>> return reg;
>> }
>>
>>
> Besides looks good to me.
> Reviewed-by: Eric Auger <eric.auger@redhat.com>
Thanks
Suzuki
next prev parent reply other threads:[~2018-09-25 10:48 UTC|newest]
Thread overview: 50+ 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 ` [PATCH v5 01/18] kvm: arm/arm64: Fix stage2_flush_memslot for 4 level page table 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 ` [PATCH v5 03/18] kvm: arm64: Add helper for loading the stage2 setting for a VM 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 ` [PATCH v5 05/18] kvm: arm64: Clean up VTCR_EL2 initialisation Suzuki K Poulose
2018-09-17 10:41 ` [PATCH v5 06/18] kvm: arm/arm64: Allow arch specific configurations for VM Suzuki K Poulose
2018-09-20 10:22 ` Auger Eric
2018-09-17 10:41 ` [PATCH v5 07/18] kvm: arm64: Configure VTCR_EL2 per VM Suzuki K Poulose
2018-09-20 10:21 ` Auger Eric
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
2018-09-20 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 ` [PATCH v5 10/18] kvm: arm64: Make stage2 page table layout dynamic Suzuki K Poulose
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
2018-09-20 14:07 ` Auger Eric
2018-09-20 15:22 ` Suzuki K Poulose
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
2018-09-20 14:25 ` Auger Eric
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 ` [PATCH v5 14/18] vgic: Add support for 52bit guest physical address Suzuki K Poulose
2018-09-21 14:57 ` Auger Eric
2018-09-25 10:49 ` Suzuki K Poulose [this message]
2018-09-17 10:41 ` [PATCH v5 15/18] kvm: arm64: Add 52bit support for PAR to HPFAR conversoin Suzuki K Poulose
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
2018-09-25 9:59 ` Auger Eric
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
2018-09-25 10:00 ` Auger Eric
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 14:20 ` Peter Maydell
2018-09-17 14:43 ` Suzuki K Poulose
2018-09-18 1:55 ` Peter Maydell
2018-09-18 15:16 ` Suzuki K Poulose
2018-09-18 15:36 ` Peter Maydell
2018-09-18 16:27 ` Suzuki K Poulose
2018-09-18 17:15 ` Peter Maydell
2018-09-19 10:03 ` Suzuki K Poulose
2018-09-25 10:00 ` Auger Eric
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 ` [kvmtool PATCH v5 20/18] kvmtool: arm64: Add support for guest physical address size 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 ` [kvmtool PATCH v5 22/18] kvmtool: arm: Add support for creating VM with PA size Suzuki K Poulose
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