linux-kernel - RE: [PATCH v3 1/2] PCI: hv: Make the code arch neutral by adding arch specific interfaces

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Date:   Wed, 20 Oct 2021 15:22:19 +0000
From:   Michael Kelley <mikelley@...rosoft.com>
To:     Sunil Muthuswamy <sunilmut@...ux.microsoft.com>,
        KY Srinivasan <kys@...rosoft.com>,
        Haiyang Zhang <haiyangz@...rosoft.com>,
        Stephen Hemminger <sthemmin@...rosoft.com>,
        "wei.liu@...nel.org" <wei.liu@...nel.org>,
        "maz@...nel.org" <maz@...nel.org>,
        Dexuan Cui <decui@...rosoft.com>,
        "tglx@...utronix.de" <tglx@...utronix.de>,
        "mingo@...hat.com" <mingo@...hat.com>,
        "bp@...en8.de" <bp@...en8.de>, "hpa@...or.com" <hpa@...or.com>,
        "lorenzo.pieralisi@....com" <lorenzo.pieralisi@....com>,
        "robh@...nel.org" <robh@...nel.org>, "kw@...ux.com" <kw@...ux.com>,
        "bhelgaas@...gle.com" <bhelgaas@...gle.com>,
        "arnd@...db.de" <arnd@...db.de>
CC:     "x86@...nel.org" <x86@...nel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-hyperv@...r.kernel.org" <linux-hyperv@...r.kernel.org>,
        "linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
        "linux-arch@...r.kernel.org" <linux-arch@...r.kernel.org>,
        Sunil Muthuswamy <sunilmut@...rosoft.com>
Subject: RE: [PATCH v3 1/2] PCI: hv: Make the code arch neutral by adding arch
 specific interfaces

From: Sunil Muthuswamy <sunilmut@...ux.microsoft.com> Sent: Thursday, October 14, 2021 8:53 AM
> 
> Encapsulate arch dependencies in Hyper-V vPCI through a set of interfaces,
> listed below. Adding these arch specific interfaces will allow for an
> implementation for other arch, such as ARM64.
> 
> Implement the interfaces for X64, which is essentially just moving over the
> current implementation.
> 
> List of added interfaces:
>  - hv_pci_irqchip_init()
>  - hv_pci_irqchip_free()
>  - hv_msi_get_int_vector()
>  - hv_set_msi_entry_from_desc()
>  - hv_msi_prepare()
> 
> There are no functional changes expected from this patch.
> 
> Signed-off-by: Sunil Muthuswamy <sunilmut@...rosoft.com>
> ---
> In v2 & v3:
>  Changes are described in the cover letter.
> 
>  MAINTAINERS                                 |  2 +
>  arch/x86/include/asm/hyperv-tlfs.h          | 33 ++++++++++++
>  arch/x86/include/asm/mshyperv.h             |  7 ---
>  drivers/pci/controller/Makefile             |  2 +-
>  drivers/pci/controller/pci-hyperv-irqchip.c | 57 +++++++++++++++++++++
>  drivers/pci/controller/pci-hyperv-irqchip.h | 20 ++++++++
>  drivers/pci/controller/pci-hyperv.c         | 52 ++++++++++++-------
>  include/asm-generic/hyperv-tlfs.h           | 33 ------------
>  8 files changed, 146 insertions(+), 60 deletions(-)
>  create mode 100644 drivers/pci/controller/pci-hyperv-irqchip.c
>  create mode 100644 drivers/pci/controller/pci-hyperv-irqchip.h
> 

Reviewed-by: Michael Kelley <mikelley@...rosoft.com>