From: Jack Lange <jacklange@cs.pitt.edu>
Date: Fri, 13 Apr 2012 23:30:26 +0000 (-0500)
Subject: added arch independent MSR storage
X-Git-Url: http://v3vee.org/palacios/gitweb/gitweb.cgi?a=commitdiff_plain;h=df69e9f90c11f91a7bb3ccdf4218ef61124a5442;p=palacios.releases.git

added arch independent MSR storage
---

diff --git a/palacios/include/palacios/vm_guest.h b/palacios/include/palacios/vm_guest.h
index a63d19e..49e8598 100644
--- a/palacios/include/palacios/vm_guest.h
+++ b/palacios/include/palacios/vm_guest.h
@@ -101,6 +101,7 @@ struct guest_info {
     struct v3_ctrl_regs ctrl_regs;
     struct v3_dbg_regs dbg_regs;
     struct v3_segments segments;
+    struct v3_msrs     msrs;
 
 
     void * vmm_data;
diff --git a/palacios/include/palacios/vmm_regs.h b/palacios/include/palacios/vmm_regs.h
index e8ed725..32a870e 100644
--- a/palacios/include/palacios/vmm_regs.h
+++ b/palacios/include/palacios/vmm_regs.h
@@ -57,6 +57,13 @@ struct v3_ctrl_regs {
 };
 
 
+struct v3_msrs {
+    v3_reg_t star;
+    v3_reg_t lstar;
+    v3_reg_t sfmask;
+    v3_reg_t kern_gs_base;
+};
+
 
 struct v3_dbg_regs {
     v3_reg_t dr0;
diff --git a/palacios/src/palacios/svm.c b/palacios/src/palacios/svm.c
index 962a34b..e13cc96 100644
--- a/palacios/src/palacios/svm.c
+++ b/palacios/src/palacios/svm.c
@@ -569,6 +569,12 @@ int v3_svm_enter(struct guest_info * info) {
     guest_state->rflags = info->ctrl_regs.rflags;
     guest_state->efer = info->ctrl_regs.efer;
     
+    /* Synchronize MSRs */
+    guest_state->star = info->msrs.star;
+    guest_state->lstar = info->msrs.lstar;
+    guest_state->sfmask = info->msrs.sfmask;
+    guest_state->KernelGsBase = info->msrs.kern_gs_base;
+
     guest_state->cpl = info->cpl;
 
     v3_set_vmcb_segments((vmcb_t*)(info->vmm_data), &(info->segments));
@@ -646,6 +652,12 @@ int v3_svm_enter(struct guest_info * info) {
     info->ctrl_regs.rflags = guest_state->rflags;
     info->ctrl_regs.efer = guest_state->efer;
     
+    /* Synchronize MSRs */
+    info->msrs.star =  guest_state->star;
+    info->msrs.lstar = guest_state->lstar;
+    info->msrs.sfmask = guest_state->sfmask;
+    info->msrs.kern_gs_base = guest_state->KernelGsBase;
+
     v3_get_vmcb_segments((vmcb_t*)(info->vmm_data), &(info->segments));
     info->cpu_mode = v3_get_vm_cpu_mode(info);
     info->mem_mode = v3_get_vm_mem_mode(info);
diff --git a/palacios/src/palacios/vmcs.c b/palacios/src/palacios/vmcs.c
index e28029e..67c6f69 100644
--- a/palacios/src/palacios/vmcs.c
+++ b/palacios/src/palacios/vmcs.c
@@ -239,6 +239,25 @@ int v3_vmx_save_vmcs(struct guest_info * info) {
     
     error =  v3_read_vmcs_segments(&(info->segments));
 
+    /* Save MSRs from MSR SAVE Area (whereever that is...)*/
+
+    info->msrs.star = vmx_info->msr_area->guest_star.hi;
+    info->msrs.star <<= 32;
+    info->msrs.star |= vmx_info->msr_area->guest_star.lo;
+
+    info->msrs.lstar = vmx_info->msr_area->guest_lstar.hi;
+    info->msrs.lstar <<= 32;
+    info->msrs.lstar |= vmx_info->msr_area->guest_lstar.lo;
+
+    info->msrs.sfmask = vmx_info->msr_area->guest_fmask.hi;
+    info->msrs.sfmask <<= 32;
+    info->msrs.sfmask |= vmx_info->msr_area->guest_fmask.lo;
+
+    info->msrs.kern_gs_base = vmx_info->msr_area->guest_kern_gs.hi;
+    info->msrs.kern_gs_base <<= 32;
+    info->msrs.kern_gs_base |= vmx_info->msr_area->guest_kern_gs.lo;
+
+
     return error;
 }
 
@@ -266,6 +285,20 @@ int v3_vmx_restore_vmcs(struct guest_info * info) {
 
     error = v3_write_vmcs_segments(&(info->segments));
 
+    /* Restore MSRs from MSR SAVE Area (whereever that is...)*/
+
+    vmx_info->msr_area->guest_star.hi = (info->msrs.star >> 32);
+    vmx_info->msr_area->guest_star.lo = (info->msrs.star & 0xffffffff);
+
+    vmx_info->msr_area->guest_lstar.hi = (info->msrs.lstar >> 32);
+    vmx_info->msr_area->guest_lstar.lo = (info->msrs.lstar & 0xffffffff);
+
+    vmx_info->msr_area->guest_fmask.hi = (info->msrs.sfmask >> 32);
+    vmx_info->msr_area->guest_fmask.lo = (info->msrs.sfmask & 0xffffffff);
+
+    vmx_info->msr_area->guest_kern_gs.hi = (info->msrs.kern_gs_base >> 32);
+    vmx_info->msr_area->guest_kern_gs.lo = (info->msrs.kern_gs_base & 0xffffffff);
+
     return error;
 
 }