Do we need to save and restore the guests GS/FS regs?

[palacios.git] / palacios / src / palacios / svm_lowlevel.S

diff --git a/palacios/src/palacios/svm_lowlevel.S b/palacios/src/palacios/svm_lowlevel.S
index 151e54b..975fe98 100644 (file)
--- a/palacios/src/palacios/svm_lowlevel.S
+++ b/palacios/src/palacios/svm_lowlevel.S
@@ -158,6 +158,8 @@ v3_svm_launch:
 
 // VMCB => RDI
 // vm_regs => RSI
+// ptr to fs => RDX
+// ptr to gs => RCX
 
 v3_svm_launch:
        pushf;
@@ -165,7 +167,20 @@ v3_svm_launch:
        push    %gs;
        PUSHA
 
-       pushq %rsi
+
+
+//     pushq   %rdx // fs
+//     pushq   %rcx // gs
+
+
+//     pushq   (%rdx)
+//     pop     %fs
+//     pushq   (%rcx)
+//     pop     %gs
+
+
+
+       pushq   %rsi
 
        movq    %rdi, %rax
        Restore_SVM_Registers(%rsi);
@@ -180,6 +195,18 @@ v3_svm_launch:
 
        addq $8, %rsp
 
+//     popq    %rcx
+//     popq    %rdx
+
+//     push    %fs
+//     popq    %rax
+//     movq    %rax, (%rdx)
+
+//     push    %gs
+//     popq    %rax
+//     movq    %rax, (%rcx)
+
+
        POPA
        pop     %gs;
        pop     %fs;