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Re: [Qemu-devel] [PATCH 6/7] s390x/pci: move the memory region write fro
From: |
Cornelia Huck |
Subject: |
Re: [Qemu-devel] [PATCH 6/7] s390x/pci: move the memory region write from pcistg |
Date: |
Fri, 10 Nov 2017 10:51:16 +0100 |
On Fri, 10 Nov 2017 17:40:12 +0800
Yi Min Zhao <address@hidden> wrote:
> 在 2017/11/10 上午3:23, Cornelia Huck 写道:
> > On Tue, 7 Nov 2017 18:24:38 +0100
> > Pierre Morel <address@hidden> wrote:
> >
> >> Let's move the memory region write from pcistg into a dedicated
> >> function.
> >> This allows us to prepare a later patch searching for subregions
> >> inside of the memory region.
> > OK, so here is the memory region write. Do we have any sleeping
> > endianness bugs in there for when we wire up tcg? I'm not sure how this
> > plays with the bswaps (see patch 1).
> >
> > But maybe I've just gotten lost somewhere.
> I think there's no error. For PCI bars' MRs, we got the little-endian data
> that is exactly fit to the byte ordering of pcilg instruction. For PCI
> config
> space, the data has been swapped according to the cpu byte ordering.
Host or target cpu?
> So we use zpci_swap_endian() to swap the data back to the little-endian
> ordering.
That swap is unconditional. If we were running on a little-endian host,
it would be wrong, wouldn't it?
> >
> >> Signed-off-by: Pierre Morel <address@hidden>
> >> Reviewed-by: Yi Min Zhao <address@hidden>
> >> ---
> >> hw/s390x/s390-pci-inst.c | 27 +++++++++++++++++----------
> >> 1 file changed, 17 insertions(+), 10 deletions(-)
- Re: [Qemu-devel] [PATCH 7/7] s390x/pci: search for subregion inside the BARs, (continued)
[Qemu-devel] [PATCH 6/7] s390x/pci: move the memory region write from pcistg, Pierre Morel, 2017/11/07
- Re: [Qemu-devel] [PATCH 6/7] s390x/pci: move the memory region write from pcistg, Cornelia Huck, 2017/11/09
- Re: [Qemu-devel] [PATCH 6/7] s390x/pci: move the memory region write from pcistg, Yi Min Zhao, 2017/11/10
- Re: [Qemu-devel] [PATCH 6/7] s390x/pci: move the memory region write from pcistg,
Cornelia Huck <=
- Re: [Qemu-devel] [PATCH 6/7] s390x/pci: move the memory region write from pcistg, Pierre Morel, 2017/11/13
- Re: [Qemu-devel] [PATCH 6/7] s390x/pci: move the memory region write from pcistg, Pierre Morel, 2017/11/13
- Re: [Qemu-devel] [PATCH 6/7] s390x/pci: move the memory region write from pcistg, Cornelia Huck, 2017/11/13
- Re: [Qemu-devel] [PATCH 6/7] s390x/pci: move the memory region write from pcistg, Pierre Morel, 2017/11/13
Re: [Qemu-devel] [PATCH 0/7] s390x/pci: Improve zPCI to cover more cases, Cornelia Huck, 2017/11/07
Re: [Qemu-devel] [PATCH 0/7] s390x/pci: Improve zPCI to cover more cases, Cornelia Huck, 2017/11/13