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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: Avi Kivity <avi@qumranet.com>
This commit is contained in:
Avi Kivity 2007-12-06 19:50:00 +02:00
parent 6e3d5dfbad
commit 80a8119ca3
2 changed files with 7 additions and 2 deletions
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8
drivers/kvm/svm.c
View File

@ -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,

1
drivers/kvm/svm.h
View File

@ -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)