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KVM: vmx: DR7 masking on task switch emulation is wrong
author
Nadav Amit
<namit@cs.technion.ac.il>
Mon, 19 May 2014 06:50:50 +0000
(09:50 +0300)
committer
Paolo Bonzini
<pbonzini@redhat.com>
Thu, 22 May 2014 15:47:18 +0000
(17:47 +0200)
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>
arch/x86/kvm/vmx.c
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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) & ~
0x
55);
/*
* TODO: What about debug traps on tss switch?
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