On Tue, Dec 27, 2016 at 07:21:39PM -0800, Raj, Ashok wrote:
> This sounds reasonable, if we can reserve from the host bridge apertures
> it should take care of hot-plug cases as well, and should simply how the
> reservation is made.
Agreed, I have this on my todo list already since I converted th
Hi Bjorn,
On Tue, Dec 27, 2016 at 05:44:17PM -0600, Bjorn Helgaas wrote:
>
> dmar_init_reserved_ranges()
> {
> ...
> for_each_pci_dev(pdev) {
> for (i = 0; i < PCI_NUM_RESOURCES; i++) {
> r = &pdev->resource[i];
> reserve_iova(r)
>
> But I assume it's possible t
On Mon, Dec 19, 2016 at 03:20:44PM -0600, Bjorn Helgaas wrote:
> Hi guys,
>
> I have some questions about dmar_init_reserved_ranges(). On systems
> where CPU physical address space is not identity-mapped to PCI bus
> address space, e.g., where the PCI host bridge windows have _TRA
> offsets, I'm
On Thu, Dec 22, 2016 at 06:48:01PM -0600, Bjorn Helgaas wrote:
> If we didn't want to use pcibios_resource_to_bus() here for some
> reason, we should at least add a comment about why we think it's OK to
> use a CPU physical address as an IOVA.
Even if there are no such x86 systems out there, I thi
Hi Ashok,
On Thu, Dec 22, 2016 at 03:45:08PM -0800, Raj, Ashok wrote:
> Hi Bjorn
>
> None in the platform group say they know about this. So i'm fairly sure
> we don't do that on Intel hardware (x86).
I'm pretty sure there was once an x86 prototype for which PCI bus
addresses were not identical
Hi Bjorn
None in the platform group say they know about this. So i'm fairly sure
we don't do that on Intel hardware (x86).
I'm not sure about the usage, it appears maybe it was a hack
pre-virtualization for some direct access? (just wild guessing)
On Thu, Dec 22, 2016 at 03:32:38PM -0800, Raj
Hi Bjorn
On Thu, Dec 22, 2016 at 02:28:03PM -0600, Bjorn Helgaas wrote:
> On Thu, Dec 22, 2016 at 05:27:14PM +0100, Joerg Roedel wrote:
> > Hi Bjorn,
> >
> > On Mon, Dec 19, 2016 at 03:20:44PM -0600, Bjorn Helgaas wrote:
> > > I have some questions about dmar_init_reserved_ranges(). On systems
>
On Thu, Dec 22, 2016 at 05:27:14PM +0100, Joerg Roedel wrote:
> Hi Bjorn,
>
> On Mon, Dec 19, 2016 at 03:20:44PM -0600, Bjorn Helgaas wrote:
> > I have some questions about dmar_init_reserved_ranges(). On systems
> > where CPU physical address space is not identity-mapped to PCI bus
> > address s
Hi Bjorn,
On Mon, Dec 19, 2016 at 03:20:44PM -0600, Bjorn Helgaas wrote:
> I have some questions about dmar_init_reserved_ranges(). On systems
> where CPU physical address space is not identity-mapped to PCI bus
> address space, e.g., where the PCI host bridge windows have _TRA
> offsets, I'm not
Hi guys,
I have some questions about dmar_init_reserved_ranges(). On systems
where CPU physical address space is not identity-mapped to PCI bus
address space, e.g., where the PCI host bridge windows have _TRA
offsets, I'm not sure we're doing the right thing.
Assume we have a PCI host bridge wit
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