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2 commits

Author SHA1 Message Date
Andi Kleen
02143c2931 x86/hyperv: Make hv_vcpu_is_preempted() visible
This function is referrenced from assembler, so it needs to be marked
visible for LTO.

Fixes: 3a025de64b ("x86/hyperv: Enable PV qspinlock for Hyper-V")
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Yi Sun <yi.y.sun@linux.intel.com>
Cc: kys@microsoft.com
Cc: haiyangz@microsoft.com
Link: https://lkml.kernel.org/r/20190330004743.29541-6-andi@firstfloor.org
2019-04-19 17:58:57 +02:00
Yi Sun
3a025de64b x86/hyperv: Enable PV qspinlock for Hyper-V
Implement the required wait and kick callbacks to support PV spinlocks in
Hyper-V guests.

[ tglx: Document the requirement for disabling interrupts in the wait()
  	callback. Remove goto and unnecessary includes. Add prototype
	for hv_vcpu_is_preempted(). Adapted to pending paravirt changes. ]

Signed-off-by: Yi Sun <yi.y.sun@linux.intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Juergen Gross <jgross@suse.com>
Cc: "K. Y. Srinivasan" <kys@microsoft.com>
Cc: Haiyang Zhang <haiyangz@microsoft.com>
Cc: Stephen Hemminger <sthemmin@microsoft.com>
Cc: Michael Kelley (EOSG) <Michael.H.Kelley@microsoft.com>
Cc: chao.p.peng@intel.com
Cc: chao.gao@intel.com
Cc: isaku.yamahata@intel.com
Cc: tianyu.lan@microsoft.com
Link: https://lkml.kernel.org/r/1538987374-51217-3-git-send-email-yi.y.sun@linux.intel.com
2018-10-09 14:21:39 +02:00