Re: [PATCH v10 3/4] powerpc/powernv: Override pcibios_default_alignment() to force PCI devices to be page aligned

On Sat, Apr 15, 2017 at 5:06 PM, Benjamin Herrenschmidt wrote: > On Sat, 2017-04-15 at 11:36 -0500, Bjorn Helgaas wrote: >> > I agree in principle. I'm surprised that PowerPC is the only one >> > interested here though, what about other platforms who want to use >> > KVM

Re: [PATCH v10 3/4] powerpc/powernv: Override pcibios_default_alignment() to force PCI devices to be page aligned

On Sat, 2017-04-15 at 11:36 -0500, Bjorn Helgaas wrote: > > I agree in principle. I'm surprised that PowerPC is the only one > > interested here though, what about other platforms who want to use > > KVM and PCI pass-through and use Linux to assign BARs ? > > If I understand correctly, the

Re: [PATCH v10 3/4] powerpc/powernv: Override pcibios_default_alignment() to force PCI devices to be page aligned

On Fri, Apr 14, 2017 at 4:52 PM, Benjamin Herrenschmidt wrote: > On Fri, 2017-04-14 at 10:58 -0500, Bjorn Helgaas wrote: >> On Mon, Apr 10, 2017 at 07:58:13PM +0800, Yongji Xie wrote: >> > This overrides pcibios_default_alignment() to set default alignment >> > to

Re: [PATCH v10 3/4] powerpc/powernv: Override pcibios_default_alignment() to force PCI devices to be page aligned

On Fri, 2017-04-14 at 10:58 -0500, Bjorn Helgaas wrote: > On Mon, Apr 10, 2017 at 07:58:13PM +0800, Yongji Xie wrote: > > This overrides pcibios_default_alignment() to set default alignment > > to PAGE_SIZE for all PCI devices on PowerNV platform. Thus sub-page > > BARs would not share a page and

Re: [PATCH v10 3/4] powerpc/powernv: Override pcibios_default_alignment() to force PCI devices to be page aligned

On Mon, Apr 10, 2017 at 07:58:13PM +0800, Yongji Xie wrote: > This overrides pcibios_default_alignment() to set default alignment > to PAGE_SIZE for all PCI devices on PowerNV platform. Thus sub-page > BARs would not share a page and could be mapped into guest when VFIO > passthrough them. Thanks