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Re: [Qemu-devel] [PATCH RFC 3/3] hw/pci-host: catch acesses to unassigne
From: |
Michael S. Tsirkin |
Subject: |
Re: [Qemu-devel] [PATCH RFC 3/3] hw/pci-host: catch acesses to unassigned pci addresses |
Date: |
Mon, 2 Sep 2013 18:57:57 +0300 |
On Mon, Sep 02, 2013 at 06:42:33PM +0300, Marcel Apfelbaum wrote:
> On Mon, 2013-09-02 at 15:39 +0100, Peter Maydell wrote:
> > On 2 September 2013 15:13, Marcel Apfelbaum <address@hidden> wrote:
> > > Added a memory region that has negative priority and
> > > extends over all the pci adddress space. This region will
> > > "catch" all the accesses to the unassigned pci
> > > addresses and it will be possible to emulate the
> > > master abort scenario (When no device on the bus claims
> > > the transaction).
> > >
> > > Signed-off-by: Marcel Apfelbaum <address@hidden>
> > > ---
> > > hw/pci-host/piix.c | 8 ++++++++
> > > hw/pci-host/q35.c | 19 ++++++++++++++++---
> > > include/hw/pci-host/q35.h | 1 +
> >
> > This is happening at the wrong layer -- you want this memory
> > region to be created and managed in the PCI core code so that
> > we get correct PCI-spec behaviour for all our PCI controllers,
> > not just the two x86 ones you've changed here.pci_address_space
> I saw that the memory regions are part of the Host state and
> duplicated for each host type(like pci_address_space).
> Question, why are not pci_address_space and pci_hole present
> in a core layer?
I think we can move them out to core.
>
> I followed the existing code; from what you are saying
> I understand that also the existing memory regions
> like the one mentioned above should be moved in
> the core layer, right?
> Marcel
pci hole is a PC thing.
> >
> > -- PMM
> >
>
- [Qemu-devel] [PATCH RFC 3/3] hw/pci-host: catch acesses to unassigned pci addresses, (continued)
- [Qemu-devel] [PATCH RFC 3/3] hw/pci-host: catch acesses to unassigned pci addresses, Marcel Apfelbaum, 2013/09/02
- Re: [Qemu-devel] [PATCH RFC 3/3] hw/pci-host: catch acesses to unassigned pci addresses, Peter Maydell, 2013/09/02
- Re: [Qemu-devel] [PATCH RFC 3/3] hw/pci-host: catch acesses to unassigned pci addresses, Marcel Apfelbaum, 2013/09/02
- Re: [Qemu-devel] [PATCH RFC 3/3] hw/pci-host: catch acesses to unassigned pci addresses, Andreas Färber, 2013/09/02
- Re: [Qemu-devel] [PATCH RFC 3/3] hw/pci-host: catch acesses to unassigned pci addresses, Peter Maydell, 2013/09/02
- Re: [Qemu-devel] [PATCH RFC 3/3] hw/pci-host: catch acesses to unassigned pci addresses, Michael S. Tsirkin, 2013/09/02
- Re: [Qemu-devel] [PATCH RFC 3/3] hw/pci-host: catch acesses to unassigned pci addresses, Peter Maydell, 2013/09/02
- Re: [Qemu-devel] [PATCH RFC 3/3] hw/pci-host: catch acesses to unassigned pci addresses, Michael S. Tsirkin, 2013/09/02
- Re: [Qemu-devel] [PATCH RFC 3/3] hw/pci-host: catch acesses to unassigned pci addresses, Peter Maydell, 2013/09/02
- Re: [Qemu-devel] [PATCH RFC 3/3] hw/pci-host: catch acesses to unassigned pci addresses, Marcel Apfelbaum, 2013/09/02
- Re: [Qemu-devel] [PATCH RFC 3/3] hw/pci-host: catch acesses to unassigned pci addresses,
Michael S. Tsirkin <=
Re: [Qemu-devel] [PATCH RFC 0/3] pci: complete master abort protocol, Peter Maydell, 2013/09/02