This patch series moves Hyper-V clock/timer code to a separate Hyper-V clocksource driver. Previously, Hyper-V clock/timer code and data structures were mixed in with other Hyper-V code in the ISA independent drivers/hv code as well as in arch dependent code. The new Hyper-V clocksource driver is ISA independent, with a just few dependencies on arch specific functions. The patch series does not change any behavior or functionality -- it only reorganizes the existing code and fixes up the linkages. A few places outside of Hyper-V code are fixed up to use the new #include file structure.
This restructuring is in response to Marc Zyngier's review comments on supporting Hyper-V running on ARM64, and is a good idea in general. It increases the amount of code shared between the x86 and ARM64 architectures, and reduces the size of the new code for supporting Hyper-V on ARM64. A new version of the Hyper-V on ARM64 patches will follow once this clocksource restructuring is accepted. The code is currently diff'ed against Linux 5.0. I'll rebase to linux-next once 5.1-rc1 is available. Michael Kelley (2): Drivers: hv: Move Hyper-V clockevents code to new clocksource driver Drivers: hv: Move Hyper-V clocksource code to new clocksource driver MAINTAINERS | 2 + arch/x86/entry/vdso/vclock_gettime.c | 1 + arch/x86/entry/vdso/vma.c | 2 +- arch/x86/hyperv/hv_init.c | 91 +--------- arch/x86/include/asm/hyperv-tlfs.h | 6 + arch/x86/include/asm/mshyperv.h | 80 ++------- arch/x86/kernel/cpu/mshyperv.c | 2 + arch/x86/kvm/x86.c | 1 + drivers/clocksource/Makefile | 1 + drivers/clocksource/hyperv_syntimer.c | 328 ++++++++++++++++++++++++++++++++++ drivers/hv/hv.c | 154 ---------------- drivers/hv/hyperv_vmbus.h | 3 - drivers/hv/vmbus_drv.c | 39 ++-- include/clocksource/hyperv_syntimer.h | 104 +++++++++++ 14 files changed, 482 insertions(+), 332 deletions(-) create mode 100644 drivers/clocksource/hyperv_syntimer.c create mode 100644 include/clocksource/hyperv_syntimer.h -- 1.8.3.1
