i386: Add support to get/set/migrate Intel Processor Trace feature

[mirror_qemu.git] / target / i386 / machine.c

diff --git a/target/i386/machine.c b/target/i386/machine.c
index 361c05aedfdc4980eda2887e63fe911be37d199a..c05fe6fb1a7aad4b46163688ff6bb10901ccf488 100644 (file)
--- a/target/i386/machine.c
+++ b/target/i386/machine.c
@@ -837,6 +837,43 @@ static const VMStateDescription vmstate_spec_ctrl = {
     }
 };
 
+static bool intel_pt_enable_needed(void *opaque)
+{
+    X86CPU *cpu = opaque;
+    CPUX86State *env = &cpu->env;
+    int i;
+
+    if (env->msr_rtit_ctrl || env->msr_rtit_status ||
+        env->msr_rtit_output_base || env->msr_rtit_output_mask ||
+        env->msr_rtit_cr3_match) {
+        return true;
+    }
+
+    for (i = 0; i < MAX_RTIT_ADDRS; i++) {
+        if (env->msr_rtit_addrs[i]) {
+            return true;
+        }
+    }
+
+    return false;
+}
+
+static const VMStateDescription vmstate_msr_intel_pt = {
+    .name = "cpu/intel_pt",
+    .version_id = 1,
+    .minimum_version_id = 1,
+    .needed = intel_pt_enable_needed,
+    .fields = (VMStateField[]) {
+        VMSTATE_UINT64(env.msr_rtit_ctrl, X86CPU),
+        VMSTATE_UINT64(env.msr_rtit_status, X86CPU),
+        VMSTATE_UINT64(env.msr_rtit_output_base, X86CPU),
+        VMSTATE_UINT64(env.msr_rtit_output_mask, X86CPU),
+        VMSTATE_UINT64(env.msr_rtit_cr3_match, X86CPU),
+        VMSTATE_UINT64_ARRAY(env.msr_rtit_addrs, X86CPU, MAX_RTIT_ADDRS),
+        VMSTATE_END_OF_LIST()
+    }
+};
+
 VMStateDescription vmstate_x86_cpu = {
     .name = "cpu",
     .version_id = 12,
@@ -957,6 +994,7 @@ VMStateDescription vmstate_x86_cpu = {
 #endif
         &vmstate_spec_ctrl,
         &vmstate_mcg_ext_ctl,
+        &vmstate_msr_intel_pt,
         NULL
     }
 };