From: Nicușor Cîțu <ncitu@xxxxxxxxxxxxxxx>
This function will be used to test if the descriptor access events
are already tracked by another user.
Signed-off-by: Nicușor Cîțu <ncitu@xxxxxxxxxxxxxxx>
Signed-off-by: Adalbert Lazăr <alazar@xxxxxxxxxxxxxxx>
---
arch/x86/include/asm/kvm_host.h | 1 +
arch/x86/kvm/svm.c | 22 ++++++++++++++++++++++
arch/x86/kvm/vmx/vmx.c | 8 ++++++++
3 files changed, 31 insertions(+)
diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index 11e49dbec78c..89968ec63b64 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -1107,6 +1107,7 @@ struct kvm_x86_ops {
void (*set_gdt)(struct kvm_vcpu *vcpu, struct desc_ptr *dt);
bool (*desc_ctrl_supported)(void);
void (*control_desc_intercept)(struct kvm_vcpu *vcpu, bool enable);
+ bool (*desc_intercepted)(struct kvm_vcpu *vcpu);
u64 (*get_dr6)(struct kvm_vcpu *vcpu);
void (*set_dr6)(struct kvm_vcpu *vcpu, unsigned long value);
void (*sync_dirty_debug_regs)(struct kvm_vcpu *vcpu);
diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index ea4f02cab67d..34e7f4f18cd8 100644
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -636,6 +636,13 @@ static inline void clr_intercept(struct vcpu_svm *svm, int bit)
recalc_intercepts(svm);
}
+static inline bool get_intercept(struct vcpu_svm *svm, int bit)
+{
+ struct vmcb *vmcb = get_host_vmcb(svm);
+
+ return (vmcb->control.intercept & (1ULL << bit));
+}
+
static inline bool vgif_enabled(struct vcpu_svm *svm)
{
return !!(svm->vmcb->control.int_ctl & V_GIF_ENABLE_MASK);
@@ -7472,6 +7479,20 @@ static void svm_control_desc_intercept(struct kvm_vcpu *vcpu, bool enable)
}
}
+static inline bool svm_desc_intercepted(struct kvm_vcpu *vcpu)
+{
+ struct vcpu_svm *svm = to_svm(vcpu);
+
+ return (get_intercept(svm, INTERCEPT_STORE_IDTR) ||
+ get_intercept(svm, INTERCEPT_STORE_GDTR) ||
+ get_intercept(svm, INTERCEPT_STORE_LDTR) ||
+ get_intercept(svm, INTERCEPT_STORE_TR) ||
+ get_intercept(svm, INTERCEPT_LOAD_IDTR) ||
+ get_intercept(svm, INTERCEPT_LOAD_GDTR) ||
+ get_intercept(svm, INTERCEPT_LOAD_LDTR) ||
+ get_intercept(svm, INTERCEPT_LOAD_TR));
+}
+
static struct kvm_x86_ops svm_x86_ops __ro_after_init = {
.cpu_has_kvm_support = has_svm,
.disabled_by_bios = is_disabled,
@@ -7522,6 +7543,7 @@ static struct kvm_x86_ops svm_x86_ops __ro_after_init = {
.set_gdt = svm_set_gdt,
.desc_ctrl_supported = svm_desc_ctrl_supported,
.control_desc_intercept = svm_control_desc_intercept,
+ .desc_intercepted = svm_desc_intercepted,
.get_dr6 = svm_get_dr6,
.set_dr6 = svm_set_dr6,
.set_dr7 = svm_set_dr7,
diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
index c710bd200c56..4651d1283698 100644
--- a/arch/x86/kvm/vmx/vmx.c
+++ b/arch/x86/kvm/vmx/vmx.c
@@ -7884,6 +7884,13 @@ static bool vmx_cr3_write_intercepted(struct kvm_vcpu *vcpu)
return !!(exec_controls_get(vmx) & CPU_BASED_CR3_LOAD_EXITING);
}
+static bool vmx_desc_intercepted(struct kvm_vcpu *vcpu)
+{
+ struct vcpu_vmx *vmx = to_vmx(vcpu);
+
+ return !!(secondary_exec_controls_get(vmx) & SECONDARY_EXEC_DESC);
+}
+
static struct kvm_x86_ops vmx_x86_ops __ro_after_init = {
.cpu_has_kvm_support = cpu_has_kvm_support,
.disabled_by_bios = vmx_disabled_by_bios,
@@ -7931,6 +7938,7 @@ static struct kvm_x86_ops vmx_x86_ops __ro_after_init = {
.set_gdt = vmx_set_gdt,
.desc_ctrl_supported = vmx_desc_ctrl_supported,
.control_desc_intercept = vmx_control_desc_intercept,
+ .desc_intercepted = vmx_desc_intercepted,
.get_dr6 = vmx_get_dr6,
.set_dr6 = vmx_set_dr6,
.set_dr7 = vmx_set_dr7,
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