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KVM: PPC: Book3S HV: Use msgsync with hypervisor doorbells on POWER9
authorNicholas Piggin <npiggin@gmail.com>
Sun, 12 Mar 2017 17:03:49 +0000 (03:03 +1000)
committerPaul Mackerras <paulus@ozlabs.org>
Thu, 24 Aug 2017 10:01:39 +0000 (20:01 +1000)
commitbd0fdb191c8523a9126bb14ac1b22cb47698ebf5
tree7887a3e0f241b09ecf4147c873a80676c1e40984tree | snapshot (tar.gz zip)
parentf2d8421b88ca28253d6265e3852de9f40aae6e63commit | diff
KVM: PPC: Book3S HV: Use msgsync with hypervisor doorbells on POWER9

When msgsnd is used for IPIs to other cores, msgsync must be executed by
the target to order stores performed on the source before its msgsnd
(provided the source executes the appropriate sync).

Fixes: 1704a81ccebc ("KVM: PPC: Book3S HV: Use msgsnd for IPIs to other cores on POWER9")
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
arch/powerpc/kvm/book3s_hv_rmhandlers.S diff | blob | blame | history