Add wbinvd VM Exit support to prepare for pass-through
device cache emulation and also enhance real time
responsibility.
Signed-off-by: Yaozu (Eddie) Dong <[EMAIL PROTECTED]>
diff --git a/drivers/kvm/vmx.c b/drivers/kvm/vmx.c
index 6fc981d..6d80a41 100644
--- a/drivers/kvm/vmx.c
+++ b/drivers/kvm/vmx.c
@@ -972,7 +972,8 @@ static __init int setup_vmcs_config(struct
vmcs_config *vmcs_conf)
#endif
if (_cpu_based_exec_control &
CPU_BASED_ACTIVATE_SECONDARY_CONTROLS) {
min = 0;
- opt = SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES;
+ opt = SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES |
+ SECONDARY_EXEC_WBINVD_EXITING;
if (adjust_vmx_controls(min, opt,
MSR_IA32_VMX_PROCBASED_CTLS2,
&_cpu_based_2nd_exec_control) <
0)
return -EIO;
@@ -2164,6 +2165,13 @@ static int handle_vmcall(struct kvm_vcpu *vcpu,
struct kvm_run *kvm_run)
return 1;
}
+static int handle_wbinvd(struct kvm_vcpu *vcpu, struct kvm_run
*kvm_run)
+{
+ skip_emulated_instruction(vcpu);
+ /* TODO: Add support for VT-d/pass-through device */
+ return 1;
+}
+
static int handle_apic_access(struct kvm_vcpu *vcpu, struct kvm_run
*kvm_run)
{
u64 exit_qualification;
@@ -2205,6 +2213,7 @@ static int (*kvm_vmx_exit_handlers[])(struct
kvm_vcpu *vcpu,
[EXIT_REASON_VMCALL] = handle_vmcall,
[EXIT_REASON_TPR_BELOW_THRESHOLD] =
handle_tpr_below_threshold,
[EXIT_REASON_APIC_ACCESS] = handle_apic_access,
+ [EXIT_REASON_WBINVD] = handle_wbinvd,
};
static const int kvm_vmx_max_exit_handlers =
diff --git a/drivers/kvm/vmx.h b/drivers/kvm/vmx.h
index 2ea35b9..5159374 100644
--- a/drivers/kvm/vmx.h
+++ b/drivers/kvm/vmx.h
@@ -49,6 +49,7 @@
* Definitions of Secondary Processor-Based VM-Execution Controls.
*/
#define SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES 0x00000001
+#define SECONDARY_EXEC_WBINVD_EXITING 0x00000040
#define PIN_BASED_EXT_INTR_MASK 0x00000001
@@ -223,6 +224,7 @@ enum vmcs_field {
#define EXIT_REASON_MWAIT_INSTRUCTION 36
#define EXIT_REASON_TPR_BELOW_THRESHOLD 43
#define EXIT_REASON_APIC_ACCESS 44
+#define EXIT_REASON_WBINVD 54
/*
* Interruption-information format
wbinvd.patch
Description: wbinvd.patch
clean.patch
Description: clean.patch
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