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Date: Thu, 2 Apr 2015 08:59:07 +0200 From: Borislav Petkov <bp@...e.de> To: Aravind Gopalakrishnan <Aravind.Gopalakrishnan@....com> Cc: tglx@...utronix.de, mingo@...hat.com, hpa@...or.com, x86@...nel.org, bhelgaas@...gle.com, linux-kernel@...r.kernel.org, Suravee.Suthikulpanit@....com, joro@...tes.org Subject: Re: [PATCH] x86, aperture: Check for GART before accessing GART registers On Wed, Apr 01, 2015 at 09:32:08AM -0500, Aravind Gopalakrishnan 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. > > Refactoring the family check used in amd_nb into an inline function > so we can use it here as well as in amd_nb.c > > Tested the patch on Fam10h and Fam15h Model 00h-fh and this code > runs fine. On Fam15h Model 60h-6fh and on Fam16h, we bail early > as they don't have GART. > > Signed-off-by: Aravind Gopalakrishnan <Aravind.Gopalakrishnan@....com> > Reviewed-by: Suravee Suthikulpanit <Suravee.Suthikulpanit@....com> > --- > arch/x86/include/asm/amd_nb.h | 11 +++++++++++ > arch/x86/kernel/amd_nb.c | 4 +--- > arch/x86/kernel/aperture_64.c | 4 ++-- > 3 files changed, 14 insertions(+), 5 deletions(-) Applied, thanks. -- Regards/Gruss, Boris. ECO tip #101: Trim your mails when you reply. -- -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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