From: Jack Lange <jarusl@cs.northwestern.edu>
Date: Wed, 22 Oct 2008 02:06:25 +0000 (-0500)
Subject: added GS.BASE save/restore
X-Git-Tag: 1.0^2~23
X-Git-Url: http://v3vee.org/palacios/gitweb/gitweb.cgi?p=palacios.git;a=commitdiff_plain;h=a6abc36ea941eb0f63783eb077d4073c8773719d

added GS.BASE save/restore
---

diff --git a/palacios/src/palacios/svm.c b/palacios/src/palacios/svm.c
index 00a9ebd..4913513 100644
--- a/palacios/src/palacios/svm.c
+++ b/palacios/src/palacios/svm.c
@@ -301,11 +301,25 @@ static int start_svm_guest(struct guest_info *info) {
 
   while (1) {
     ullong_t tmp_tsc;
+    uint_t vm_cr_low = 0, vm_cr_high = 0;
 
 
     v3_enable_ints();
     v3_clgi();
 
+    {
+
+      v3_get_msr(0xc0000101, &vm_cr_high, &vm_cr_low);
+
+      PrintDebug("GS.Base: %x:%x\n", vm_cr_high, vm_cr_low); 
+      /*
+      v3_get_msr(0xc0000102, &vm_cr_high, &vm_cr_low);
+
+      PrintDebug("KernelGSBase: %x:%x\n", vm_cr_high, vm_cr_low); 
+      */
+
+    }
+
     PrintDebug("SVM Entry to rip=%x...\n", info->rip);
 
     rdtscll(info->time_state.cached_host_tsc);
@@ -315,6 +329,21 @@ static int start_svm_guest(struct guest_info *info) {
 
     rdtscll(tmp_tsc);
     PrintDebug("SVM Returned\n");
+
+
+    {
+
+      v3_set_msr(0xc0000101, vm_cr_high, vm_cr_low);
+
+      PrintDebug("GS.Base: %x:%x\n", vm_cr_high, vm_cr_low); 
+
+      /*
+      v3_get_msr(0xc0000102, &vm_cr_high, &vm_cr_low);
+
+      PrintDebug("KernelGSBase: %x:%x\n", vm_cr_high, vm_cr_low); 
+      */
+
+    }
     
     {
       uint_t x = 0;
diff --git a/palacios/src/palacios/svm_lowlevel.S b/palacios/src/palacios/svm_lowlevel.S
index e01f069..1e36bc9 100644
--- a/palacios/src/palacios/svm_lowlevel.S
+++ b/palacios/src/palacios/svm_lowlevel.S
@@ -139,6 +139,9 @@ v3_svm_launch:
 	push	%gs;
 	PUSHA
 
+	
+	
+
 
 	pushq %rsi
 
@@ -146,18 +149,21 @@ v3_svm_launch:
 	Restore_SVM_Registers(%rsi);
 
 
-
+	
 
 	vmload;
 	vmrun;
 	vmsave;
 
 
-	
 	Save_SVM_Registers(8(%rsp));
 
 	addq $8, %rsp
 
+
+
+
+
 	POPA
 	pop	%gs;
 	pop	%fs;