Messages in this thread | | | From | KY Srinivasan <> | Subject | RE: [PATCH 0/4] Hyper-V: Enable Linux guests on Hyper-V on ARM64 | Date | Thu, 22 Nov 2018 03:02:55 +0000 |
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> -----Original Message----- > From: kys@linuxonhyperv.com <kys@linuxonhyperv.com> > Sent: Wednesday, November 21, 2018 6:51 PM > To: gregkh@linuxfoundation.org; linux-kernel@vger.kernel.org; > devel@linuxdriverproject.org; olaf@aepfle.de; apw@canonical.com; > jasowang@redhat.com; Stephen Hemminger <sthemmin@microsoft.com>; > Michael Kelley <mikelley@microsoft.com>; vkuznets > <vkuznets@redhat.com> > Cc: KY Srinivasan <kys@microsoft.com> > Subject: [PATCH 0/4] Hyper-V: Enable Linux guests on Hyper-V on ARM64 > > From: "K. Y. Srinivasan" <kys@microsoft.com> > > 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
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