From: Sunil Muthuswamy <redacted> 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 <redacted>
---
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 <redacted>