Messages in this thread | | | Date | Fri, 23 May 2008 12:06:27 -0700 | From | "Yinghai Lu" <> | Subject | Re: Enable mmconf access to PCI ECS for all AMD fam10h systems |
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On Fri, May 23, 2008 at 11:18 AM, Arjan van de Ven <arjan@infradead.org> wrote: > On Fri, 23 May 2008 10:57:22 -0700 > "Yinghai Lu" <yhlu.kernel@gmail.com> wrote: > >> On Fri, May 23, 2008 at 5:46 AM, Robert Richter >> <robert.richter@amd.com> wrote: >> > Yinghai, >> > >> > We would like to enable ECS for all fam10h systems. What was the >> > reason for patch 5f0b2976 that enables it for Sun systems only? If >> > there are no objections, this patch should be reverted. >> >> Someone express the concern about touching MSR. Arjan or Andi? >> >> for those of system that doesn't have MCFG table there, they could use >> pci=check_enable_amd_mmconf to enable it forcely. > > using MMIO if the bios doesn't allow it via MCFG is a huge mistake and > shouldn't be done. > > Using the extended port IO version is actually perfectly reasonable to > me and I would encourage that to be in the kernel (and be used in favor > of MCFG if the port IO method is there)
that extend access via port IO on AMD Fam10h doesn't support pci domain other than domain 0.
YH
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