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Commit 727f5a23 authored by Jan Kiszka's avatar Jan Kiszka Committed by Marcelo Tosatti
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KVM: SVM: Trap all debug register accesses 



To enable proper debug register emulation under all conditions, trap
access to all DR0..7. This may be optimized later on.

Signed-off-by: default avatarJan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: default avatarMarcelo Tosatti <mtosatti@redhat.com>
parent c76de350

arch/x86/kvm/svm.c

+13 −1
Original line number Diff line number Diff line
@@ -554,13 +554,19 @@ static void init_vmcb(struct vcpu_svm *svm) 
	control->intercept_dr_read = 	INTERCEPT_DR0_MASK |

					INTERCEPT_DR1_MASK |

					INTERCEPT_DR2_MASK |

					INTERCEPT_DR3_MASK;

					INTERCEPT_DR3_MASK |

					INTERCEPT_DR4_MASK |

					INTERCEPT_DR5_MASK |

					INTERCEPT_DR6_MASK |

					INTERCEPT_DR7_MASK;



	control->intercept_dr_write = 	INTERCEPT_DR0_MASK |

					INTERCEPT_DR1_MASK |

					INTERCEPT_DR2_MASK |

					INTERCEPT_DR3_MASK |

					INTERCEPT_DR4_MASK |

					INTERCEPT_DR5_MASK |

					INTERCEPT_DR6_MASK |

					INTERCEPT_DR7_MASK;



	control->intercept_exceptions = (1 << PF_VECTOR) |
@@ -2319,11 +2325,17 @@ static int (*svm_exit_handlers[])(struct vcpu_svm *svm) = { 
	[SVM_EXIT_READ_DR1]			= emulate_on_interception,

	[SVM_EXIT_READ_DR2]			= emulate_on_interception,

	[SVM_EXIT_READ_DR3]			= emulate_on_interception,

	[SVM_EXIT_READ_DR4]			= emulate_on_interception,

	[SVM_EXIT_READ_DR5]			= emulate_on_interception,

	[SVM_EXIT_READ_DR6]			= emulate_on_interception,

	[SVM_EXIT_READ_DR7]			= emulate_on_interception,

	[SVM_EXIT_WRITE_DR0]			= emulate_on_interception,

	[SVM_EXIT_WRITE_DR1]			= emulate_on_interception,

	[SVM_EXIT_WRITE_DR2]			= emulate_on_interception,

	[SVM_EXIT_WRITE_DR3]			= emulate_on_interception,

	[SVM_EXIT_WRITE_DR4]			= emulate_on_interception,

	[SVM_EXIT_WRITE_DR5]			= emulate_on_interception,

	[SVM_EXIT_WRITE_DR6]			= emulate_on_interception,

	[SVM_EXIT_WRITE_DR7]			= emulate_on_interception,

	[SVM_EXIT_EXCP_BASE + DB_VECTOR]	= db_interception,

	[SVM_EXIT_EXCP_BASE + BP_VECTOR]	= bp_interception,