[PATCH 09/12] powerpc: Mark writes registering ipi to host cpu through kvm

[Rohan McLure]

Mark writes to hypervisor ipi state so that KCSAN recognises these
asynchronous issue of kvmppc_{set,clear}_host_ipi to be intended, with
atomic writes.

Signed-off-by: Rohan McLure <rmclure at linux.ibm.com>
---
 arch/powerpc/include/asm/kvm_ppc.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/powerpc/include/asm/kvm_ppc.h b/arch/powerpc/include/asm/kvm_ppc.h
index bc57d058ad5b..d701df006c08 100644
--- a/arch/powerpc/include/asm/kvm_ppc.h
+++ b/arch/powerpc/include/asm/kvm_ppc.h
@@ -548,12 +548,12 @@ static inline void kvmppc_set_host_ipi(int cpu)
 	 * pairs with the barrier in kvmppc_clear_host_ipi()
 	 */
 	smp_mb();
-	paca_ptrs[cpu]->kvm_hstate.host_ipi = 1;
+	WRITE_ONCE(paca_ptrs[cpu]->kvm_hstate.host_ipi, 1);
 }
 
 static inline void kvmppc_clear_host_ipi(int cpu)
 {
-	paca_ptrs[cpu]->kvm_hstate.host_ipi = 0;
+	WRITE_ONCE(paca_ptrs[cpu]->kvm_hstate.host_ipi, 0);
 	/*
 	 * order clearing of host_ipi flag vs. processing of IPI messages
 	 *
-- 
2.37.2