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Commit 80a8119c authored by Avi Kivity's avatar Avi Kivity
Browse files

KVM: SVM: Trap access to the cr8 register 



Later we may be able to use the virtual tpr feature, but for now,
just trap it.

Signed-off-by: default avatarAvi Kivity <avi@qumranet.com>
parent 6e3d5dfb

drivers/kvm/svm.c

+6 −2
Original line number Diff line number Diff line
@@ -449,11 +449,13 @@ static void init_vmcb(struct vmcb *vmcb) 


	control->intercept_cr_read = 	INTERCEPT_CR0_MASK |

					INTERCEPT_CR3_MASK |

					INTERCEPT_CR4_MASK;

					INTERCEPT_CR4_MASK |

					INTERCEPT_CR8_MASK;



	control->intercept_cr_write = 	INTERCEPT_CR0_MASK |

					INTERCEPT_CR3_MASK |

					INTERCEPT_CR4_MASK;

					INTERCEPT_CR4_MASK |

					INTERCEPT_CR8_MASK;



	control->intercept_dr_read = 	INTERCEPT_DR0_MASK |

					INTERCEPT_DR1_MASK |
@@ -1195,10 +1197,12 @@ static int (*svm_exit_handlers[])(struct vcpu_svm *svm, 
	[SVM_EXIT_READ_CR0]           		= emulate_on_interception,

	[SVM_EXIT_READ_CR3]           		= emulate_on_interception,

	[SVM_EXIT_READ_CR4]           		= emulate_on_interception,

	[SVM_EXIT_READ_CR8]           		= emulate_on_interception,

	/* for now: */

	[SVM_EXIT_WRITE_CR0]          		= emulate_on_interception,

	[SVM_EXIT_WRITE_CR3]          		= emulate_on_interception,

	[SVM_EXIT_WRITE_CR4]          		= emulate_on_interception,

	[SVM_EXIT_WRITE_CR8]          		= emulate_on_interception,

	[SVM_EXIT_READ_DR0] 			= emulate_on_interception,

	[SVM_EXIT_READ_DR1]			= emulate_on_interception,

	[SVM_EXIT_READ_DR2]			= emulate_on_interception,

drivers/kvm/svm.h

+1 −0
Original line number Diff line number Diff line
@@ -204,6 +204,7 @@ struct __attribute__ ((__packed__)) vmcb { 
#define INTERCEPT_CR0_MASK 1

#define INTERCEPT_CR3_MASK (1 << 3)

#define INTERCEPT_CR4_MASK (1 << 4)

#define INTERCEPT_CR8_MASK (1 << 8)



#define INTERCEPT_DR0_MASK 1

#define INTERCEPT_DR1_MASK (1 << 1)