KVM: VMX: Fix DR6 update on #DB exception

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According to the SDM, only bits 0-3 of DR6 "may" be cleared by "certain"
debug exception. So do update them on #DB exception in KVM, but leave
the rest alone, only setting BD and BS in addition to already set bits
in DR6. This also aligns us with kvm_vcpu_check_singlestep.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

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Jan Kiszka 2014-01-04 18:47:17 +01:00 • committed by Paolo Bonzini

parent 73aaf249ee

commit 8246bf52c7

1 changed files with 2 additions and 1 deletions

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arch/x86/kvm/vmx.c

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