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Subject[PATCH] KVM: X86: Fix missing local pCPU when executing wbinvd on all dirty pCPUs
Date
From: Wanpeng Li <wanpengli@tencent.com>

We should execute wbinvd on all dirty pCPUs when guest wbinvd exits
to maintain datat consistency in order to deal with noncoherent DMA.
smp_call_function_many() does not execute the provided function on
the local core, this patch replaces it by on_each_cpu_mask().

Reported-by: Nadav Amit <namit@vmware.com>
Cc: Nadav Amit <namit@vmware.com>
Signed-off-by: Wanpeng Li <wanpengli@tencent.com>
---
arch/x86/kvm/x86.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 012d5df..aa6d667 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -6638,7 +6638,7 @@ static int kvm_emulate_wbinvd_noskip(struct kvm_vcpu *vcpu)
int cpu = get_cpu();

cpumask_set_cpu(cpu, vcpu->arch.wbinvd_dirty_mask);
- smp_call_function_many(vcpu->arch.wbinvd_dirty_mask,
+ on_each_cpu_mask(vcpu->arch.wbinvd_dirty_mask,
wbinvd_ipi, NULL, 1);
put_cpu();
cpumask_clear(vcpu->arch.wbinvd_dirty_mask);
--
2.7.4
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