arch/x86/pci/xen.c | 8 ++------ drivers/pci/controller/vmd.c | 19 ++++++++++++++++++ drivers/pci/msi/msi.c | 37 ++++++++++++++++++++---------------- drivers/xen/pci.c | 19 ++++++++++++++++++ include/linux/msi.h | 3 ++- kernel/irq/msi.c | 2 +- 6 files changed, 64 insertions(+), 24 deletions(-)
Hello, The following series should fix the usage of devices behind a VMD bridge when running Linux as a Xen PV hardware domain (dom0). I've only been able to test PV. I think PVH should also work but I don't have hardware capable of testing it right now. I don't expect the first two patches to be problematic, the last patch is likely to be more controversial. I've tested it internally and didn't see any issues, but my testing of PV mode is mostly limited to dom0. Thanks, Roger. Roger Pau Monne (3): xen/pci: do not register devices with segments >= 0x10000 vmd: disable MSI remapping bypass under Xen pci/msi: remove pci_msi_ignore_mask arch/x86/pci/xen.c | 8 ++------ drivers/pci/controller/vmd.c | 19 ++++++++++++++++++ drivers/pci/msi/msi.c | 37 ++++++++++++++++++++---------------- drivers/xen/pci.c | 19 ++++++++++++++++++ include/linux/msi.h | 3 ++- kernel/irq/msi.c | 2 +- 6 files changed, 64 insertions(+), 24 deletions(-) -- 2.46.0
[+to Juergen, Nirmal, +cc Jonathan] On Tue, Jan 14, 2025 at 11:33:10AM +0100, Roger Pau Monne wrote: > Hello, > > The following series should fix the usage of devices behind a VMD bridge > when running Linux as a Xen PV hardware domain (dom0). I've only been > able to test PV. I think PVH should also work but I don't have hardware > capable of testing it right now. > > I don't expect the first two patches to be problematic, the last patch > is likely to be more controversial. I've tested it internally and > didn't see any issues, but my testing of PV mode is mostly limited to > dom0. > > Thanks, Roger. > > Roger Pau Monne (3): > xen/pci: do not register devices with segments >= 0x10000 > vmd: disable MSI remapping bypass under Xen > pci/msi: remove pci_msi_ignore_mask > > arch/x86/pci/xen.c | 8 ++------ > drivers/pci/controller/vmd.c | 19 ++++++++++++++++++ > drivers/pci/msi/msi.c | 37 ++++++++++++++++++++---------------- > drivers/xen/pci.c | 19 ++++++++++++++++++ > include/linux/msi.h | 3 ++- > kernel/irq/msi.c | 2 +- > 6 files changed, 64 insertions(+), 24 deletions(-) We got an ack from Thomas, so I'm fine with this from a PCI perspective. How should it be merged? Via Xen or PCI? I'm happy to merge via PCI, but would also want acks from Juergen for the Xen piece and Nirmal for the VMD piece. I have a couple more trivial comments, will respond to those patches.
On 14.02.25 18:17, Bjorn Helgaas wrote: > [+to Juergen, Nirmal, +cc Jonathan] > > On Tue, Jan 14, 2025 at 11:33:10AM +0100, Roger Pau Monne wrote: >> Hello, >> >> The following series should fix the usage of devices behind a VMD bridge >> when running Linux as a Xen PV hardware domain (dom0). I've only been >> able to test PV. I think PVH should also work but I don't have hardware >> capable of testing it right now. >> >> I don't expect the first two patches to be problematic, the last patch >> is likely to be more controversial. I've tested it internally and >> didn't see any issues, but my testing of PV mode is mostly limited to >> dom0. >> >> Thanks, Roger. >> >> Roger Pau Monne (3): >> xen/pci: do not register devices with segments >= 0x10000 >> vmd: disable MSI remapping bypass under Xen >> pci/msi: remove pci_msi_ignore_mask >> >> arch/x86/pci/xen.c | 8 ++------ >> drivers/pci/controller/vmd.c | 19 ++++++++++++++++++ >> drivers/pci/msi/msi.c | 37 ++++++++++++++++++++---------------- >> drivers/xen/pci.c | 19 ++++++++++++++++++ >> include/linux/msi.h | 3 ++- >> kernel/irq/msi.c | 2 +- >> 6 files changed, 64 insertions(+), 24 deletions(-) > > We got an ack from Thomas, so I'm fine with this from a PCI > perspective. How should it be merged? Via Xen or PCI? I'm happy to > merge via PCI, but would also want acks from Juergen for the Xen > piece and Nirmal for the VMD piece. I'm fine with this to go in via the PCI tree. For the Xen related parts: Acked-by: Juergen Gross <jgross@suse.com> Juergen
Ping? This has been pending for 3 weeks without replies. Thanks, Roger. On Tue, Jan 14, 2025 at 11:33:10AM +0100, Roger Pau Monne wrote: > Hello, > > The following series should fix the usage of devices behind a VMD bridge > when running Linux as a Xen PV hardware domain (dom0). I've only been > able to test PV. I think PVH should also work but I don't have hardware > capable of testing it right now. > > I don't expect the first two patches to be problematic, the last patch > is likely to be more controversial. I've tested it internally and > didn't see any issues, but my testing of PV mode is mostly limited to > dom0. > > Thanks, Roger. > > Roger Pau Monne (3): > xen/pci: do not register devices with segments >= 0x10000 > vmd: disable MSI remapping bypass under Xen > pci/msi: remove pci_msi_ignore_mask > > arch/x86/pci/xen.c | 8 ++------ > drivers/pci/controller/vmd.c | 19 ++++++++++++++++++ > drivers/pci/msi/msi.c | 37 ++++++++++++++++++++---------------- > drivers/xen/pci.c | 19 ++++++++++++++++++ > include/linux/msi.h | 3 ++- > kernel/irq/msi.c | 2 +- > 6 files changed, 64 insertions(+), 24 deletions(-) > > -- > 2.46.0 >
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