diff options
author | Jan Kiszka <jan.kiszka@web.de> | 2009-10-03 00:31:21 +0200 |
---|---|---|
committer | Avi Kivity <avi@redhat.com> | 2009-12-03 09:32:14 +0200 |
commit | 355be0b9300579e02275d7d19374806a974ce622 (patch) | |
tree | faa52bac7a0d1d83c7a0a8f1bec01088b77a68fb /arch/x86 | |
parent | 201d945bcfb0d53e67c9c081f7c28532eb4669c7 (diff) | |
download | op-kernel-dev-355be0b9300579e02275d7d19374806a974ce622.zip op-kernel-dev-355be0b9300579e02275d7d19374806a974ce622.tar.gz |
KVM: x86: Refactor guest debug IOCTL handling
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>
Diffstat (limited to 'arch/x86')
-rw-r--r-- | arch/x86/include/asm/kvm_host.h | 4 | ||||
-rw-r--r-- | arch/x86/kvm/svm.c | 14 | ||||
-rw-r--r-- | arch/x86/kvm/vmx.c | 18 | ||||
-rw-r--r-- | arch/x86/kvm/x86.c | 28 |
4 files changed, 26 insertions, 38 deletions
diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h index 295c7c4..e7f8708 100644 --- a/arch/x86/include/asm/kvm_host.h +++ b/arch/x86/include/asm/kvm_host.h @@ -475,8 +475,8 @@ struct kvm_x86_ops { void (*vcpu_load)(struct kvm_vcpu *vcpu, int cpu); void (*vcpu_put)(struct kvm_vcpu *vcpu); - int (*set_guest_debug)(struct kvm_vcpu *vcpu, - struct kvm_guest_debug *dbg); + void (*set_guest_debug)(struct kvm_vcpu *vcpu, + struct kvm_guest_debug *dbg); int (*get_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata); int (*set_msr)(struct kvm_vcpu *vcpu, u32 msr_index, u64 data); u64 (*get_segment_base)(struct kvm_vcpu *vcpu, int seg); diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c index 02a4269..279a2ae 100644 --- a/arch/x86/kvm/svm.c +++ b/arch/x86/kvm/svm.c @@ -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) diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index 97f4265..70020e5 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -1096,30 +1096,14 @@ static void vmx_cache_reg(struct kvm_vcpu *vcpu, enum kvm_reg reg) } } -static int set_guest_debug(struct kvm_vcpu *vcpu, struct kvm_guest_debug *dbg) +static void set_guest_debug(struct kvm_vcpu *vcpu, struct kvm_guest_debug *dbg) { - int old_debug = vcpu->guest_debug; - unsigned long flags; - - vcpu->guest_debug = dbg->control; - if (!(vcpu->guest_debug & KVM_GUESTDBG_ENABLE)) - vcpu->guest_debug = 0; - if (vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP) vmcs_writel(GUEST_DR7, dbg->arch.debugreg[7]); else vmcs_writel(GUEST_DR7, vcpu->arch.dr7); - flags = vmcs_readl(GUEST_RFLAGS); - if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP) - flags |= X86_EFLAGS_TF | X86_EFLAGS_RF; - else if (old_debug & KVM_GUESTDBG_SINGLESTEP) - flags &= ~(X86_EFLAGS_TF | X86_EFLAGS_RF); - vmcs_writel(GUEST_RFLAGS, flags); - update_exception_bitmap(vcpu); - - return 0; } static __init int cpu_has_kvm_support(void) diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 5f44d56..a06f88e 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -4472,12 +4472,19 @@ int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu, struct kvm_guest_debug *dbg) { - int i, r; + unsigned long rflags; + int old_debug; + int i; vcpu_load(vcpu); - if ((dbg->control & (KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_USE_HW_BP)) == - (KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_USE_HW_BP)) { + old_debug = vcpu->guest_debug; + + vcpu->guest_debug = dbg->control; + if (!(vcpu->guest_debug & KVM_GUESTDBG_ENABLE)) + vcpu->guest_debug = 0; + + if (vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP) { for (i = 0; i < KVM_NR_DB_REGS; ++i) vcpu->arch.eff_db[i] = dbg->arch.debugreg[i]; vcpu->arch.switch_db_regs = @@ -4488,16 +4495,23 @@ int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu, vcpu->arch.switch_db_regs = (vcpu->arch.dr7 & DR7_BP_EN_MASK); } - r = kvm_x86_ops->set_guest_debug(vcpu, dbg); + rflags = kvm_x86_ops->get_rflags(vcpu); + if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP) + rflags |= X86_EFLAGS_TF | X86_EFLAGS_RF; + else if (old_debug & KVM_GUESTDBG_SINGLESTEP) + rflags &= ~(X86_EFLAGS_TF | X86_EFLAGS_RF); + kvm_x86_ops->set_rflags(vcpu, rflags); - if (dbg->control & KVM_GUESTDBG_INJECT_DB) + kvm_x86_ops->set_guest_debug(vcpu, dbg); + + if (vcpu->guest_debug & KVM_GUESTDBG_INJECT_DB) kvm_queue_exception(vcpu, DB_VECTOR); - else if (dbg->control & KVM_GUESTDBG_INJECT_BP) + else if (vcpu->guest_debug & KVM_GUESTDBG_INJECT_BP) kvm_queue_exception(vcpu, BP_VECTOR); vcpu_put(vcpu); - return r; + return 0; } /* |