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

[Paolo Bonzini]

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