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From: Tomasz Nowicki <tn@semihalf.com>
To: Eric Auger <eric.auger@redhat.com>,
	eric.auger.pro@gmail.com, christoffer.dall@linaro.org,
	marc.zyngier@arm.com, robin.murphy@arm.com,
	alex.williamson@redhat.com, will.deacon@arm.com, joro@8bytes.org,
	tglx@linutronix.de, jason@lakedaemon.net,
	linux-arm-kernel@lists.infradead.org
Cc: drjones@redhat.com, kvm@vger.kernel.org, punit.agrawal@arm.com,
	linux-kernel@vger.kernel.org, geethasowjanya.akula@gmail.com,
	diana.craciun@nxp.com, iommu@lists.linux-foundation.org,
	pranav.sawargaonkar@gmail.com, bharat.bhushan@nxp.com,
	shankerd@codeaurora.org, gpkulkarni@gmail.com
Subject: Re: [PATCH v8 00/18] KVM PCIe/MSI passthrough on ARM/ARM64 and IOVA reserved regions
Date: Fri, 13 Jan 2017 14:59:16 +0100	[thread overview]
Message-ID: <e1e6d9cf-5fb8-e118-3a47-4c6be77c21a3@semihalf.com> (raw)
In-Reply-To: <1484127714-3263-1-git-send-email-eric.auger@redhat.com>

Hello Eric,

On 11.01.2017 10:41, Eric Auger wrote:
> Following LPC discussions, we now report reserved regions through
> the iommu-group sysfs reserved_regions attribute file.
>
> Reserved regions are populated through the IOMMU get_resv_region
> callback (former get_dm_regions), now implemented by amd-iommu,
> intel-iommu and arm-smmu:
> - the intel-iommu reports the [0xfee00000 - 0xfeefffff] MSI window
>   as a reserved region and RMRR regions as direct-mapped regions.
> - the amd-iommu reports device direct mapped regions, the MSI region
>   and HT regions.
> - the arm-smmu reports the MSI window (arbitrarily located at
>   0x8000000 and 1MB large).
>
> Unsafe interrupt assignment is tested by enumerating all MSI irq
> domains and checking MSI remapping is supported in the above hierarchy.
> This check is done in case we detect the iommu translates MSI
> (an IOMMU_RESV_MSI window exists). Otherwise the IRQ remapping
> capability is checked at IOMMU level. Obviously this is a defensive
> IRQ safety assessment: Assuming there are several MSI controllers
> in the system and at least one does not implement IRQ remapping,
> the assignment will be considered as unsafe (even if this controller
> is not acessible from the assigned devices).
>
> The series first patch stems from Robin's branch:
> http://linux-arm.org/git?p=linux-rm.git;a=shortlog;h=refs/heads/iommu/misc
>
> Best Regards
>
> Eric
>
> Git: complete series available at
> https://github.com/eauger/linux/tree/v4.10-rc3-reserved-v8

I tested the series on ThunderX with internal 10G VNIC and Intel IXGBE 
NIC. Please feel free to add my:
Tested-by: Tomasz Nowicki <tomasz.nowicki@caviumnetworks.com>

Thanks,
Tomasz

  parent reply	other threads:[~2017-01-13 13:59 UTC|newest]

Thread overview: 40+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-01-11  9:41 [PATCH v8 00/18] KVM PCIe/MSI passthrough on ARM/ARM64 and IOVA reserved regions Eric Auger
2017-01-11  9:41 ` [PATCH v8 01/18] iommu/dma: Allow MSI-only cookies Eric Auger
2017-01-17 11:59   ` Tomasz Nowicki
2017-01-11  9:41 ` [PATCH v8 02/18] iommu: Rename iommu_dm_regions into iommu_resv_regions Eric Auger
2017-01-17 12:08   ` Tomasz Nowicki
2017-01-11  9:41 ` [PATCH v8 03/18] iommu: Add a new type field in iommu_resv_region Eric Auger
2017-01-11  9:41 ` [PATCH v8 04/18] iommu: iommu_alloc_resv_region Eric Auger
2017-01-17 12:12   ` Tomasz Nowicki
2017-01-11  9:41 ` [PATCH v8 05/18] iommu: Only map direct mapped regions Eric Auger
2017-01-17 12:13   ` Tomasz Nowicki
2017-01-11  9:41 ` [PATCH v8 06/18] iommu: iommu_get_group_resv_regions Eric Auger
2017-01-17 12:14   ` Tomasz Nowicki
2017-01-11  9:41 ` [PATCH v8 07/18] iommu: Implement reserved_regions iommu-group sysfs file Eric Auger
2017-01-11  9:41 ` [PATCH v8 08/18] iommu/vt-d: Implement reserved region get/put callbacks Eric Auger
2017-01-11  9:41 ` [PATCH v8 09/18] iommu/amd: Declare MSI and HT regions as reserved IOVA regions Eric Auger
2017-01-11  9:41 ` [PATCH v8 10/18] iommu/arm-smmu: Implement reserved region get/put callbacks Eric Auger
2017-01-17 13:20   ` Tomasz Nowicki
2017-01-11  9:41 ` [PATCH v8 11/18] iommu/arm-smmu-v3: " Eric Auger
2017-01-17 14:13   ` Tomasz Nowicki
2017-01-11  9:41 ` [PATCH v8 12/18] irqdomain: Add irq domain MSI and MSI_REMAP flags Eric Auger
2017-01-18  8:35   ` Tomasz Nowicki
2017-01-11  9:41 ` [PATCH v8 13/18] genirq/msi: Set IRQ_DOMAIN_FLAG_MSI on MSI domain creation Eric Auger
2017-01-18  8:36   ` Tomasz Nowicki
2017-01-11  9:41 ` [PATCH v8 14/18] irqdomain: irq_domain_check_msi_remap Eric Auger
2017-01-17 13:40   ` Tomasz Nowicki
2017-01-17 13:53     ` Auger Eric
2017-01-17 14:06       ` Tomasz Nowicki
2017-01-18  8:40         ` Tomasz Nowicki
2017-01-11  9:41 ` [PATCH v8 15/18] irqchip/gicv3-its: Sets IRQ_DOMAIN_FLAG_MSI_REMAP Eric Auger
2017-01-11  9:41 ` [PATCH v8 16/18] vfio/type1: Allow transparent MSI IOVA allocation Eric Auger
2017-01-13 23:04   ` Alex Williamson
2017-01-11  9:41 ` [PATCH v8 17/18] vfio/type1: Check MSI remapping at irq domain level Eric Auger
2017-01-13 23:04   ` Alex Williamson
2017-01-11  9:41 ` [PATCH v8 18/18] iommu/arm-smmu: Do not advertise IOMMU_CAP_INTR_REMAP anymore Eric Auger
2017-01-18 11:46   ` Tomasz Nowicki
2017-01-12  3:59 ` [PATCH v8 00/18] KVM PCIe/MSI passthrough on ARM/ARM64 and IOVA reserved regions Bharat Bhushan
2017-01-12  7:40   ` Auger Eric
2017-01-13 13:59 ` Tomasz Nowicki [this message]
2017-01-16  9:07   ` Auger Eric
2017-01-18 13:02   ` Auger Eric

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