From: Keir Fraser <keir.fraser@citrix.com>
Date: Wed, 28 Nov 2007 22:36:33 +0000 (+0000)
Subject: vmx: Better tracing in vmcs_dump_vcpu() -- grab RIP/RSP/RFLAGS from
X-Git-Tag: archive/raspbian/4.8.0-1+rpi1~1^2~14684^2~1
X-Git-Url: https://dgit.raspbian.org/?a=commitdiff_plain;h=e29c63f1fe4ffe63cfb62e457c8b75f56b933aaa;p=xen.git

vmx: Better tracing in vmcs_dump_vcpu() -- grab RIP/RSP/RFLAGS from
cpu_user_regs structure as well as VMCS.
Signed-off-by: Keir Fraser <keir.fraser@citrix.com>
---

diff --git a/xen/arch/x86/hvm/vmx/vmcs.c b/xen/arch/x86/hvm/vmx/vmcs.c
index 3a184c55ba..1cb1746516 100644
--- a/xen/arch/x86/hvm/vmx/vmcs.c
+++ b/xen/arch/x86/hvm/vmx/vmcs.c
@@ -819,10 +819,16 @@ static unsigned long vmr(unsigned long field)
     return rc ? 0 : val;
 }
 
-void vmcs_dump_vcpu(void)
+void vmcs_dump_vcpu(struct vcpu *v)
 {
+    struct cpu_user_regs *regs = &v->arch.guest_context.user_regs;
     unsigned long long x;
 
+    if ( v == current )
+        regs = guest_cpu_user_regs();
+
+    vmx_vmcs_enter(v);
+
     printk("*** Guest State ***\n");
     printk("CR0: actual=0x%016llx, shadow=0x%016llx, gh_mask=%016llx\n",
            (unsigned long long)vmr(GUEST_CR0),
@@ -841,11 +847,14 @@ void vmcs_dump_vcpu(void)
     printk("     target2=%016llx, target3=%016llx\n",
            (unsigned long long)vmr(CR3_TARGET_VALUE2),
            (unsigned long long)vmr(CR3_TARGET_VALUE3));
-    printk("RSP = 0x%016llx  RIP = 0x%016llx\n", 
+    printk("RSP = 0x%016llx (0x%016llx)  RIP = 0x%016llx (0x%016llx)\n", 
            (unsigned long long)vmr(GUEST_RSP),
-           (unsigned long long)vmr(GUEST_RIP));
-    printk("RFLAGS=0x%016llx  DR7 = 0x%016llx\n", 
+           (unsigned long long)regs->esp,
+           (unsigned long long)vmr(GUEST_RIP),
+           (unsigned long long)regs->eip);
+    printk("RFLAGS=0x%016llx (0x%016llx)  DR7 = 0x%016llx\n", 
            (unsigned long long)vmr(GUEST_RFLAGS),
+           (unsigned long long)regs->eflags,
            (unsigned long long)vmr(GUEST_DR7));
     printk("Sysenter RSP=%016llx CS:RIP=%04x:%016llx\n",
            (unsigned long long)vmr(GUEST_SYSENTER_ESP),
@@ -926,6 +935,8 @@ void vmcs_dump_vcpu(void)
            (uint32_t)vmr(IDT_VECTORING_ERROR_CODE));
     printk("TPR Threshold = 0x%02x\n",
            (uint32_t)vmr(TPR_THRESHOLD));
+
+    vmx_vmcs_exit(v);
 }
 
 static void vmcs_dump(unsigned char ch)
@@ -945,9 +956,7 @@ static void vmcs_dump(unsigned char ch)
         for_each_vcpu ( d, v )
         {
             printk("\tVCPU %d\n", v->vcpu_id);
-            vmx_vmcs_enter(v);
-            vmcs_dump_vcpu();
-            vmx_vmcs_exit(v);
+            vmcs_dump_vcpu(v);
         }
     }
 
diff --git a/xen/arch/x86/hvm/vmx/vmx.c b/xen/arch/x86/hvm/vmx/vmx.c
index fd61b48823..667b59f964 100644
--- a/xen/arch/x86/hvm/vmx/vmx.c
+++ b/xen/arch/x86/hvm/vmx/vmx.c
@@ -2722,6 +2722,7 @@ static void vmx_failed_vmentry(unsigned int exit_reason,
 {
     unsigned int failed_vmentry_reason = (uint16_t)exit_reason;
     unsigned long exit_qualification = __vmread(EXIT_QUALIFICATION);
+    struct vcpu *curr = current;
 
     printk("Failed vm entry (exit reason 0x%x) ", exit_reason);
     switch ( failed_vmentry_reason )
@@ -2734,7 +2735,7 @@ static void vmx_failed_vmentry(unsigned int exit_reason,
         break;
     case EXIT_REASON_MACHINE_CHECK:
         printk("caused by machine check.\n");
-        HVMTRACE_0D(MCE, current);
+        HVMTRACE_0D(MCE, curr);
         do_machine_check(regs);
         break;
     default:
@@ -2743,10 +2744,10 @@ static void vmx_failed_vmentry(unsigned int exit_reason,
     }
 
     printk("************* VMCS Area **************\n");
-    vmcs_dump_vcpu();
+    vmcs_dump_vcpu(curr);
     printk("**************************************\n");
 
-    domain_crash(current->domain);
+    domain_crash(curr->domain);
 }
 
 asmlinkage void vmx_vmexit_handler(struct cpu_user_regs *regs)
diff --git a/xen/include/asm-x86/hvm/vmx/vmcs.h b/xen/include/asm-x86/hvm/vmx/vmcs.h
index 68d1819d32..47ef3a9da7 100644
--- a/xen/include/asm-x86/hvm/vmx/vmcs.h
+++ b/xen/include/asm-x86/hvm/vmx/vmcs.h
@@ -28,7 +28,7 @@
 #endif
 
 extern void start_vmx(void);
-extern void vmcs_dump_vcpu(void);
+extern void vmcs_dump_vcpu(struct vcpu *v);
 extern void setup_vmcs_dump(void);
 extern int  vmx_cpu_up(void);
 extern void vmx_cpu_down(void);