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Open Source and information security mailing list archives
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Date: Fri, 4 Dec 2009 16:19:47 -0800 From: Jesse Barnes <jbarnes@...tuousgeek.org> To: Chris Wright <chrisw@...s-sol.org> Cc: Allen Kay <allen.m.kay@...el.com>, linux-kernel@...r.kernel.org, linux-pci@...r.kernel.org, matthew@....cx, chrisw@...s-sol.org, jeremy@...p.org, donald.d.dugger@...el.com, joerg.roedel@....com, dwmw2@...radead.org, iommu@...ts.linux-foundation.org Subject: Re: [PATCH] pci: add pci_request_acs On Fri, 4 Dec 2009 12:15:21 -0800 Chris Wright <chrisw@...s-sol.org> wrote: > Commit ae21ee65e8bc228416bbcc8a1da01c56a847a60c "PCI: acs p2p upsteram > forwarding enabling" doesn't actually enable ACS. > > Add a function to pci core to allow an IOMMU to request that ACS > be enabled. The existing mechanism of using iommu_found() in the pci > core to know when ACS should be enabled doesn't actually work due to > initialization order; iommu has only been detected not initialized. > > Have Intel and AMD IOMMUs request ACS, and Xen does as well during > early init of dom0. > > Cc: Allen Kay <allen.m.kay@...el.com> > Cc: David Woodhouse <dwmw2@...radead.org> > Cc: Jeremy Fitzhardinge <jeremy@...p.org> > Cc: Joerg Roedel <joerg.roedel@....com> > Signed-off-by: Chris Wright <chrisw@...s-sol.org> Applied this one, thanks. -- Jesse Barnes, Intel Open Source Technology Center -- 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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