KVM: vmx: DR7 masking on task switch emulation is wrong

The DR7 masking which is done on task switch emulation should be in hex format
(clearing the local breakpoints enable bits 0,2,4 and 6).

Signed-off-by: Nadav Amit <namit@cs.technion.ac.il>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index a267108403f527d92f8ac3c2820151efe1680631..248287cefa7a6b95c593985d89cd40f47a3763da 100644 (file)
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -5401,7 +5401,7 @@ static int handle_task_switch(struct kvm_vcpu *vcpu)
        }
 
        /* clear all local breakpoint enable flags */
-       vmcs_writel(GUEST_DR7, vmcs_readl(GUEST_DR7) & ~55);
+       vmcs_writel(GUEST_DR7, vmcs_readl(GUEST_DR7) & ~0x55);
 
        /*
         * TODO: What about debug traps on tss switch?