From 4ac334295e4f3b996e9feabe36e79e44bf77a06f Mon Sep 17 00:00:00 2001 From: James Hogan Date: Fri, 22 Apr 2016 10:38:49 +0100 Subject: [PATCH] MIPS: KVM: Add missing disable FPU hazard barriers MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit Add the necessary hazard barriers after disabling the FPU in kvm_lose_fpu(), just to be safe. Signed-off-by: James Hogan Cc: Ralf Baechle Cc: Paolo Bonzini Cc: "Radim Krčmář" Cc: linux-mips@linux-mips.org Cc: kvm@vger.kernel.org Signed-off-by: Paolo Bonzini --- arch/mips/kvm/mips.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/arch/mips/kvm/mips.c b/arch/mips/kvm/mips.c index ec3fe09..23b2094 100644 --- a/arch/mips/kvm/mips.c +++ b/arch/mips/kvm/mips.c @@ -1556,8 +1556,10 @@ void kvm_lose_fpu(struct kvm_vcpu *vcpu) /* Disable MSA & FPU */ disable_msa(); - if (vcpu->arch.fpu_inuse & KVM_MIPS_FPU_FPU) + if (vcpu->arch.fpu_inuse & KVM_MIPS_FPU_FPU) { clear_c0_status(ST0_CU1 | ST0_FR); + disable_fpu_hazard(); + } vcpu->arch.fpu_inuse &= ~(KVM_MIPS_FPU_FPU | KVM_MIPS_FPU_MSA); } else if (vcpu->arch.fpu_inuse & KVM_MIPS_FPU_FPU) { set_c0_status(ST0_CU1); @@ -1568,6 +1570,7 @@ void kvm_lose_fpu(struct kvm_vcpu *vcpu) /* Disable FPU */ clear_c0_status(ST0_CU1 | ST0_FR); + disable_fpu_hazard(); } preempt_enable(); } -- 2.7.4