X-Git-Url: http://v3vee.org/palacios/gitweb/gitweb.cgi?a=blobdiff_plain;f=palacios%2Fsrc%2Fpalacios%2Fsvm.c;h=5220c835a55be32c4321123df7b6311e13763311;hb=1316eb77b6d89245583446dab3345f749c415764;hp=76a57ddcb091f6f666de04c90bc677d173fb0ee1;hpb=6ce5a308d167ac392c0f0ca66811f51580358191;p=palacios.git

diff --git a/palacios/src/palacios/svm.c b/palacios/src/palacios/svm.c
index 76a57dd..5220c83 100644
--- a/palacios/src/palacios/svm.c
+++ b/palacios/src/palacios/svm.c
@@ -266,9 +266,6 @@ static int init_svm_guest(struct guest_info * info, struct v3_vm_config * config
     return 0;
 }
 
-
-
-// can we start a kernel thread here...
 static int start_svm_guest(struct guest_info *info) {
     //    vmcb_saved_state_t * guest_state = GET_VMCB_SAVE_STATE_AREA((vmcb_t*)(info->vmm_data));
     //  vmcb_ctrl_t * guest_ctrl = GET_VMCB_CTRL_AREA((vmcb_t*)(info->vmm_data));
@@ -386,7 +383,7 @@ int v3_is_svm_capable() {
 	    
 	    v3_cpuid(CPUID_SVM_REV_AND_FEATURE_IDS, &eax, &ebx, &ecx, &edx);
 	    
-	    PrintDebug("CPUID_FEATURE_IDS_edx=%p\n", (void *)edx);
+	    PrintDebug("CPUID_SVM_REV_AND_FEATURE_IDS_edx=%p\n", (void *)edx);
 	    
 	    if ((edx & CPUID_SVM_REV_AND_FEATURE_IDS_edx_svml) == 0) {
 		PrintDebug("SVM BIOS Disabled, not unlockable\n");
@@ -399,10 +396,10 @@ int v3_is_svm_capable() {
 	    PrintDebug("SVM is available and  enabled.\n");
 
 	    v3_cpuid(CPUID_SVM_REV_AND_FEATURE_IDS, &eax, &ebx, &ecx, &edx);
-	    PrintDebug("CPUID_FEATURE_IDS_eax=%p\n", (void *)eax);
-	    PrintDebug("CPUID_FEATURE_IDS_ebx=%p\n", (void *)ebx);
-	    PrintDebug("CPUID_FEATURE_IDS_ecx=%p\n", (void *)ecx);
-	    PrintDebug("CPUID_FEATURE_IDS_edx=%p\n", (void *)edx);
+	    PrintDebug("CPUID_SVM_REV_AND_FEATURE_IDS_eax=%p\n", (void *)eax);
+	    PrintDebug("CPUID_SVM_REV_AND_FEATURE_IDS_ebx=%p\n", (void *)ebx);
+	    PrintDebug("CPUID_SVM_REV_AND_FEATURE_IDS_ecx=%p\n", (void *)ecx);
+	    PrintDebug("CPUID_SVM_REV_AND_FEATURE_IDS_edx=%p\n", (void *)edx);
 
 
 	    if ((edx & CPUID_SVM_REV_AND_FEATURE_IDS_edx_np) == 0) {
@@ -458,6 +455,72 @@ void v3_init_SVM(struct v3_ctrl_ops * vmm_ops) {
     PrintDebug("Host State being saved at %p\n", (void *)(addr_t)host_vmcb);
     v3_set_msr(SVM_VM_HSAVE_PA_MSR, msr.e_reg.high, msr.e_reg.low);
 
+
+
+    /* 
+     * Test VMSAVE/VMLOAD Latency 
+     */
+#define vmsave ".byte 0x0F,0x01,0xDB ; "
+#define vmload ".byte 0x0F,0x01,0xDA ; "
+    {
+	uint32_t start_lo, start_hi;
+	uint32_t end_lo, end_hi;
+	uint64_t start, end;
+
+	__asm__ __volatile__ (
+			      "rdtsc ; "
+			      "movl %%eax, %%esi ; "
+			      "movl %%edx, %%edi ; "
+			      "movq  %%rcx, %%rax ; "
+			      vmsave
+			      "rdtsc ; "
+			      : "=D"(start_hi), "=S"(start_lo), "=a"(end_lo),"=d"(end_hi)
+			      : "c"(host_vmcb), "0"(0), "1"(0), "2"(0), "3"(0)
+			      );
+	
+	start = start_hi;
+	start <<= 32;
+	start += start_lo;
+
+	end = end_hi;
+	end <<= 32;
+	end += end_lo;
+
+
+	PrintDebug("VMSave Cycle Latency: %d\n", (uint32_t)(end - start));
+	
+
+
+
+	__asm__ __volatile__ (
+			      "rdtsc ; "
+			      "movl %%eax, %%esi ; "
+			      "movl %%edx, %%edi ; "
+			      "movq  %%rcx, %%rax ; "
+			      vmload
+			      "rdtsc ; "
+			      : "=D"(start_hi), "=S"(start_lo), "=a"(end_lo),"=d"(end_hi)
+			      : "c"(host_vmcb), "0"(0), "1"(0), "2"(0), "3"(0)
+			      );
+	
+	start = start_hi;
+	start <<= 32;
+	start += start_lo;
+
+	end = end_hi;
+	end <<= 32;
+	end += end_lo;
+
+
+	PrintDebug("VMLoad Cycle Latency: %d\n", (uint32_t)(end - start));
+	
+
+			       
+    }
+
+
+    /* End Latency Test */
+
     if (has_svm_nested_paging() == 1) {
 	v3_cpu_type = V3_SVM_REV3_CPU;
     } else {