linux/include/asm-generic/mshyperv.h, branch v5.4Mirror of https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/
https://git.shady.money/linux/atom?h=v5.42019-08-23T14:59:54Zclocksource/drivers/hyperv: Add Hyper-V specific sched clock function2019-08-23T14:59:54ZTianyu LanTianyu.Lan@microsoft.com2019-08-14T12:32:16Zurn:sha1:bd00cd52d5be655a2f217e2ed74b91a71cb2b14f
Hyper-V guests use the default native_sched_clock() in
pv_ops.time.sched_clock on x86. But native_sched_clock() directly uses the
raw TSC value, which can be discontinuous in a Hyper-V VM.
Add the generic hv_setup_sched_clock() to set the sched clock function
appropriately. On x86, this sets pv_ops.time.sched_clock to read the
Hyper-V reference TSC value that is scaled and adjusted to be continuous.
Also move the Hyper-V reference TSC initialization much earlier in the boot
process so no discontinuity is observed when pv_ops.time.sched_clock
calculates its offset.
[ tglx: Folded build fix ]
Signed-off-by: Tianyu Lan <Tianyu.Lan@microsoft.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Michael Kelley <mikelley@microsoft.com>
Link: https://lkml.kernel.org/r/20190814123216.32245-3-Tianyu.Lan@microsoft.com
Drivers: hv: vmbus: Break out ISA independent parts of mshyperv.h2019-07-08T23:06:27ZMichael Kelleymikelley@microsoft.com2019-05-30T00:14:00Zurn:sha1:765e33f5211ab620c117ff1ee0c4f38c10f7a973
Break out parts of mshyperv.h that are ISA independent into a
separate file in include/asm-generic. This move facilitates
ARM64 code reusing these definitions and avoids code
duplication. No functionality or behavior is changed.
Signed-off-by: Michael Kelley <mikelley@microsoft.com>
Reviewed-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>