Re: [PATCH] x86, aperture: Check for GART before accessing GART registers

Ingo Molnar
2015-04-02T10:01:44Z

* Aravind Gopalakrishnan <Aravind.Gopalakrishnan@amd.com> wrote:

> GART registers are not present in newer processors (Fam15h, Model 10h
> and later). So, avoid accesses to GART registers in PCI config
> space by returning early in early_gart_iommu_check() and
> gart_iommu_hole_init() if GART is not available.

In what fashion did this problem manifest itself on real systems?

Thanks,

Ingo