KVM: x86: Make register state after reset conform to specification

VMX behaves now as SVM wrt to FPU initialization. Code has been moved to
generic code path. General-purpose registers are now cleared on reset and
INIT.  SVM code properly initializes EDX.

Signed-off-by: Julian Stecklina <jsteckli@os.inf.tu-dresden.de>
Signed-off-by: Gleb Natapov <gleb@redhat.com>

1 files changed, 10 insertions, 0 deletions

diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 3bdaf298b8c7..57c76e86e9bd 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -6461,6 +6461,10 @@ static int kvm_vcpu_reset(struct kvm_vcpu *vcpu)
 
         kvm_pmu_reset(vcpu);
 
+        memset(vcpu->arch.regs, 0, sizeof(vcpu->arch.regs));
+        vcpu->arch.regs_avail = ~0;
+        vcpu->arch.regs_dirty = ~0;
+
         return kvm_x86_ops->vcpu_reset(vcpu);
 }
 
@@ -6629,11 +6633,17 @@ int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
         if (!zalloc_cpumask_var(&vcpu->arch.wbinvd_dirty_mask, GFP_KERNEL))
                 goto fail_free_mce_banks;
 
+        r = fx_init(vcpu);
+        if (r)
+                goto fail_free_wbinvd_dirty_mask;
+
         vcpu->arch.ia32_tsc_adjust_msr = 0x0;
         kvm_async_pf_hash_reset(vcpu);
         kvm_pmu_init(vcpu);
 
         return 0;
+fail_free_wbinvd_dirty_mask:
+        free_cpumask_var(vcpu->arch.wbinvd_dirty_mask);
 fail_free_mce_banks:
         kfree(vcpu->arch.mce_banks);
 fail_free_lapic: