lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  PHC 
Open Source and information security mailing list archives
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date:   Mon, 16 Jan 2017 10:07:46 +0100
From:   Auger Eric <>
To:     Tomasz Nowicki <>,,,,,,,,,,
Subject: Re: [PATCH v8 00/18] KVM PCIe/MSI passthrough on ARM/ARM64 and IOVA
 reserved regions

Hi Tomasz,

On 13/01/2017 14:59, Tomasz Nowicki wrote:
> 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:
>> Best Regards
>> Eric
>> Git: complete series available at
> I tested the series on ThunderX with internal 10G VNIC and Intel IXGBE
> NIC. Please feel free to add my:
> Tested-by: Tomasz Nowicki <>
Many thanks!

> Thanks,
> Tomasz
> _______________________________________________
> linux-arm-kernel mailing list

Powered by blists - more mailing lists