linux-kernel - Re: [PATCH] selftests: KVM: avoid failures due to reserved HyperTransport region

lists.openwall.net		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 linux-cve-announce 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]

Message-ID: <5f3c13be-f65d-1793-bd91-7491d3e149b0@redhat.com>
Date:   Mon, 9 Aug 2021 11:03:22 +0200
From:   Paolo Bonzini <pbonzini@...hat.com>
To:     Joao Martins <joao.m.martins@...cle.com>
Cc:     stable@...r.kernel.org, David Matlack <dmatlack@...gle.com>,
        Maxim Levitsky <mlevitsk@...hat.com>,
        linux-kernel@...r.kernel.org, kvm@...r.kernel.org
Subject: Re: [PATCH] selftests: KVM: avoid failures due to reserved
 HyperTransport region

On 06/08/21 12:57, Joao Martins wrote:
>   Base Address   Top Address   Use
> 
>    FD_0000_0000h FD_F7FF_FFFFh Reserved interrupt address space
>    FD_F800_0000h FD_F8FF_FFFFh Interrupt/EOI IntCtl
>    FD_F900_0000h FD_F90F_FFFFh Legacy PIC IACK
>    FD_F910_0000h FD_F91F_FFFFh System Management
>    FD_F920_0000h FD_FAFF_FFFFh Reserved Page Tables
>    FD_FB00_0000h FD_FBFF_FFFFh Address Translation
>    FD_FC00_0000h FD_FDFF_FFFFh I/O Space
>    FD_FE00_0000h FD_FFFF_FFFFh Configuration
>    FE_0000_0000h FE_1FFF_FFFFh Extended Configuration/Device Messages
>    FE_2000_0000h FF_FFFF_FFFFh Reserved

The problems we're seeing are with FFFD_0000_0000h.  How does the IOMMU 
interpret bits 40-47 of the address?

Paolo