linux-kernel - RE: [PATCH v6 0/7] PCI: hv: New paravirtual PCI front-end for Hyper-V VMs

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Message-ID: <DM2PR0301MB12326BFF4891831AF426C17DAB0E0@DM2PR0301MB1232.namprd03.prod.outlook.com>
Date:	Wed, 2 Dec 2015 21:23:57 +0000
From:	Jake Oshins <jakeo@...rosoft.com>
To:	Jake Oshins <jakeo@...rosoft.com>,
	"gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
	KY Srinivasan <kys@...rosoft.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"devel@...uxdriverproject.org" <devel@...uxdriverproject.org>,
	"olaf@...fle.de" <olaf@...fle.de>,
	"apw@...onical.com" <apw@...onical.com>,
	"vkuznets@...hat.com" <vkuznets@...hat.com>,
	"tglx@...utronix.de" <tglx@...utronix.de>,
	Haiyang Zhang <haiyangz@...rosoft.com>,
	"marc.zyngier@....com" <marc.zyngier@....com>,
	"bhelgaas@...gle.com" <bhelgaas@...gle.com>,
	"linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>
Subject: RE: [PATCH v6 0/7] PCI: hv: New paravirtual PCI front-end for Hyper-V
 VMs

> -----Original Message-----
> From: jakeo@...rosoft.com [mailto:jakeo@...rosoft.com]
> Sent: Monday, November 2, 2015 1:33 PM
> To: gregkh@...uxfoundation.org; KY Srinivasan <kys@...rosoft.com>; linux-
> kernel@...r.kernel.org; devel@...uxdriverproject.org; olaf@...fle.de;
> apw@...onical.com; vkuznets@...hat.com; tglx@...hat.com; Haiyang
> Zhang <haiyangz@...rosoft.com>; marc.zyngier@....com;
> bhelgaas@...gle.com; linux-pci@...r.kernel.org
> Cc: Jake Oshins <jakeo@...rosoft.com>
> Subject: [PATCH v6 0/7] PCI: hv: New paravirtual PCI front-end for Hyper-V
> VMs
> 
> From: Jake Oshins <jakeo@...rosoft.com>
> 
> This version of this patch series incorporates feedback from Andy
> Shevchenko.
> 
> First, export functions that allow correlating Hyper-V virtual processors
> and Linux cpus, along with the means for invoking a hypercall that targets
> interrupts at chosen vectors on specfic cpus.
> 
> Second, mark various parts of IRQ domain related code as exported, so that
> this PCI front-end can implement an IRQ domain as part of a module.  (The
> alternative would be to pull all this into the kernel, which would pull
> in a lot of other Hyper-V related code, as this IRQ domain depends on
> hv_vmbus.ko.)
> 
> Third, modify PCI so that new root PCI buses can be marked with an
> associated
> fwnode_handle, and so that root PCI buses can look up their associated IRQ
> domain by that handle.
> 
> Fourth, introduce a new driver, hv_pcifront, which eposes root PCI buses in
> a Hyper-V VM.  These root PCI buses expose real PCIe devices, or PCI Virtual
> Functions.
> 
> Jake Oshins (7):
>   drivers:hv: Export a function that maps Linux CPU num onto Hyper-V
>     proc num
>   drivers:hv: Export hv_do_hypercall()
>   PCI: Make it possible to implement a PCI MSI IRQ Domain in a module.
>   PCI: Add fwnode_handle to pci_sysdata
>   PCI: irqdomain: Look up IRQ domain by fwnode_handle
>   drivers:hv: Define the channel type of Hyper-V PCI Express
>     pass-through
>   PCI: hv: New paravirtual PCI front-end for Hyper-V VMs
> 
>  MAINTAINERS                    |    1 +
>  arch/x86/include/asm/msi.h     |    4 +
>  arch/x86/include/asm/pci.h     |   13 +
>  arch/x86/kernel/apic/msi.c     |    5 +-
>  arch/x86/kernel/apic/vector.c  |    2 +
>  drivers/hv/hv.c                |   20 +-
>  drivers/hv/hyperv_vmbus.h      |    2 +-
>  drivers/hv/vmbus_drv.c         |   17 +
>  drivers/pci/Kconfig            |    7 +
>  drivers/pci/host/Makefile      |    1 +
>  drivers/pci/host/hv_pcifront.c | 2267
> ++++++++++++++++++++++++++++++++++++++++
>  drivers/pci/msi.c              |    4 +
>  drivers/pci/probe.c            |   14 +
>  include/asm-generic/pci.h      |    4 +
>  include/linux/hyperv.h         |   14 +
>  kernel/irq/chip.c              |    1 +
>  kernel/irq/irqdomain.c         |    2 +
>  17 files changed, 2365 insertions(+), 13 deletions(-)
>  create mode 100644 drivers/pci/host/hv_pcifront.c
> 
> --
> 1.9.1


Apparently I've been using the wrong e-mail address for Thomas Gleixner.  Sorry about that.

Are there any more comments about this patch series?

Thanks,
Jake Oshins

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