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

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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




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