From: "K. Y. Srinivasan" <[email protected]>
This series enables Linux guests running on Hyper-V on ARM64
hardware. New ARM64-specific code in arch/arm64/hyperv initializes
Hyper-V, including its synthetic clocks and hypercall mechanism.
Existing architecture independent drivers for Hyper-V's VMbus and
synthetic devices just work when built for ARM64. Hyper-V code is
built and included in the image and modules only if CONFIG_HYPERV
is enabled.
The four patches are organized as follows:
1) Add include files that define the Hyper-V interface as
described in the Hyper-V Top Level Functional Spec (TLFS), plus
additional definitions specific to Linux running on Hyper-V.
2) Add core Hyper-V support on ARM64, including hypercalls,
synthetic clock initialization, and interrupt handlers.
3) Update the existing VMbus driver to generalize interrupt
management across x86/x64 and ARM64.
4) Make CONFIG_HYPERV selectable on ARM64 in addition to x86/x64.
Some areas of Linux guests on Hyper-V on ARM64 are a work-
in-progress, primarily due to work still being done in Hyper-V:
* Hyper-V on ARM64 currently runs with a 4 Kbyte page size, and only
supports guests with a 4 Kbyte page size. Because Hyper-V uses
shared pages to communicate between the guest and the hypervisor,
there are open design decisions on the page size to use when
the guest is using 16K/64K pages. Once those issues are
resolved and Hyper-V fully supports 16K/64K guest pages, changes
may be needed in the Linux drivers for Hyper-V synthetic devices.
* Hyper-V on ARM64 does not currently support mapping PCI devices
into the guest address space. The Hyper-V PCI driver at
drivers/pci/host/pci-hyperv.c has x86/x64-specific code and is
not being built for ARM64.
In a few cases, terminology from the x86/x64 world has been carried
over into the ARM64 code ("MSR", "TSC"). Hyper-V still uses the
x86/x64 terminology and has not replaced it with something more
generic, so the code uses the Hyper-V terminology. This will be
fixed when Hyper-V updates the usage in the TLFS.
Michael Kelley (4):
arm64: hyperv: Add core Hyper-V include files
arm64: hyperv: Add support for Hyper-V as a hypervisor
Drivers: hv: vmbus: Add hooks for per-CPU IRQ
Drivers: hv: Enable CONFIG_HYPERV on ARM64
MAINTAINERS | 4 +
arch/arm64/Makefile | 1 +
arch/arm64/hyperv/Makefile | 2 +
arch/arm64/hyperv/hv_hvc.S | 54 ++++
arch/arm64/hyperv/hv_init.c | 441 +++++++++++++++++++++++++++
arch/arm64/hyperv/mshyperv.c | 178 +++++++++++
arch/arm64/include/asm/hyperv-tlfs.h | 338 ++++++++++++++++++++
arch/arm64/include/asm/mshyperv.h | 116 +++++++
arch/x86/include/asm/mshyperv.h | 4 +
drivers/hv/Kconfig | 3 +-
drivers/hv/hv.c | 2 +
include/asm-generic/mshyperv.h | 240 +++++++++++++++
12 files changed, 1382 insertions(+), 1 deletion(-)
create mode 100644 arch/arm64/hyperv/Makefile
create mode 100644 arch/arm64/hyperv/hv_hvc.S
create mode 100644 arch/arm64/hyperv/hv_init.c
create mode 100644 arch/arm64/hyperv/mshyperv.c
create mode 100644 arch/arm64/include/asm/hyperv-tlfs.h
create mode 100644 arch/arm64/include/asm/mshyperv.h
create mode 100644 include/asm-generic/mshyperv.h
--
2.19.1
> -----Original Message-----
> From: [email protected] <[email protected]>
> Sent: Wednesday, November 21, 2018 6:51 PM
> To: [email protected]; [email protected];
> [email protected]; [email protected]; [email protected];
> [email protected]; Stephen Hemminger <[email protected]>;
> Michael Kelley <[email protected]>; vkuznets
> <[email protected]>
> Cc: KY Srinivasan <[email protected]>
> Subject: [PATCH 0/4] Hyper-V: Enable Linux guests on Hyper-V on ARM64
>
> From: "K. Y. Srinivasan" <[email protected]>
>
> This series enables Linux guests running on Hyper-V on ARM64
> hardware. New ARM64-specific code in arch/arm64/hyperv initializes
> Hyper-V, including its synthetic clocks and hypercall mechanism.
> Existing architecture independent drivers for Hyper-V's VMbus and
> synthetic devices just work when built for ARM64. Hyper-V code is
> built and included in the image and modules only if CONFIG_HYPERV
> is enabled.
>
> The four patches are organized as follows:
> 1) Add include files that define the Hyper-V interface as
> described in the Hyper-V Top Level Functional Spec (TLFS), plus
> additional definitions specific to Linux running on Hyper-V.
>
> 2) Add core Hyper-V support on ARM64, including hypercalls,
> synthetic clock initialization, and interrupt handlers.
>
> 3) Update the existing VMbus driver to generalize interrupt
> management across x86/x64 and ARM64.
>
> 4) Make CONFIG_HYPERV selectable on ARM64 in addition to x86/x64.
>
> Some areas of Linux guests on Hyper-V on ARM64 are a work-
> in-progress, primarily due to work still being done in Hyper-V:
>
> * Hyper-V on ARM64 currently runs with a 4 Kbyte page size, and only
> supports guests with a 4 Kbyte page size. Because Hyper-V uses
> shared pages to communicate between the guest and the hypervisor,
> there are open design decisions on the page size to use when
> the guest is using 16K/64K pages. Once those issues are
> resolved and Hyper-V fully supports 16K/64K guest pages, changes
> may be needed in the Linux drivers for Hyper-V synthetic devices.
>
> * Hyper-V on ARM64 does not currently support mapping PCI devices
> into the guest address space. The Hyper-V PCI driver at
> drivers/pci/host/pci-hyperv.c has x86/x64-specific code and is
> not being built for ARM64.
>
> In a few cases, terminology from the x86/x64 world has been carried
> over into the ARM64 code ("MSR", "TSC"). Hyper-V still uses the
> x86/x64 terminology and has not replaced it with something more
> generic, so the code uses the Hyper-V terminology. This will be
> fixed when Hyper-V updates the usage in the TLFS.
>
>
> Michael Kelley (4):
> arm64: hyperv: Add core Hyper-V include files
> arm64: hyperv: Add support for Hyper-V as a hypervisor
> Drivers: hv: vmbus: Add hooks for per-CPU IRQ
> Drivers: hv: Enable CONFIG_HYPERV on ARM64
>
> MAINTAINERS | 4 +
> arch/arm64/Makefile | 1 +
> arch/arm64/hyperv/Makefile | 2 +
> arch/arm64/hyperv/hv_hvc.S | 54 ++++
> arch/arm64/hyperv/hv_init.c | 441 +++++++++++++++++++++++++++
> arch/arm64/hyperv/mshyperv.c | 178 +++++++++++
> arch/arm64/include/asm/hyperv-tlfs.h | 338 ++++++++++++++++++++
> arch/arm64/include/asm/mshyperv.h | 116 +++++++
> arch/x86/include/asm/mshyperv.h | 4 +
> drivers/hv/Kconfig | 3 +-
> drivers/hv/hv.c | 2 +
> include/asm-generic/mshyperv.h | 240 +++++++++++++++
> 12 files changed, 1382 insertions(+), 1 deletion(-)
> create mode 100644 arch/arm64/hyperv/Makefile
> create mode 100644 arch/arm64/hyperv/hv_hvc.S
> create mode 100644 arch/arm64/hyperv/hv_init.c
> create mode 100644 arch/arm64/hyperv/mshyperv.c
> create mode 100644 arch/arm64/include/asm/hyperv-tlfs.h
> create mode 100644 arch/arm64/include/asm/mshyperv.h
> create mode 100644 include/asm-generic/mshyperv.h
>
Greg,
Please drop this. I will be resending shortly.
K. Y
> --
> 2.19.1