lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

KVM: x86: Refactor guest debug IOCTL handling

Browse Source 
Much of so far vendor-specific code for setting up guest debug can
actually be handled by the generic code. This also fixes a minor deficit
in the SVM part /wrt processing KVM_GUESTDBG_ENABLE.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
This commit is contained in:
Jan Kiszka
2009-10-03 00:31:21 +02:00
committed by Avi Kivity
parent 201d945bcf
commit 355be0b930
4 changed files with 26 additions and 38 deletions
Download Patch File Download Diff File Expand all files Collapse all files

14
arch/x86/kvm/svm.c
View File

@@ -1065,26 +1065,16 @@ static void update_db_intercept(struct kvm_vcpu *vcpu)
vcpu->guest_debug = 0;
}
static int svm_guest_debug(struct kvm_vcpu *vcpu, struct kvm_guest_debug *dbg)
static void svm_guest_debug(struct kvm_vcpu *vcpu, struct kvm_guest_debug *dbg)
{
int old_debug = vcpu->guest_debug;
struct vcpu_svm *svm = to_svm(vcpu);
vcpu->guest_debug = dbg->control;
update_db_intercept(vcpu);
if (vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP)
svm->vmcb->save.dr7 = dbg->arch.debugreg[7];
else
svm->vmcb->save.dr7 = vcpu->arch.dr7;
if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP)
svm->vmcb->save.rflags |= X86_EFLAGS_TF | X86_EFLAGS_RF;
else if (old_debug & KVM_GUESTDBG_SINGLESTEP)
svm->vmcb->save.rflags &= ~(X86_EFLAGS_TF | X86_EFLAGS_RF);
return 0;
update_db_intercept(vcpu);
}
static void load_host_msrs(struct kvm_vcpu *vcpu)