[Xen-devel] [PATCH 08 of 20] Emulation of guest VMPTRST

[Eddie Dong <eddie.dong@xxxxxxxxx>]

# HG changeset patch
# User Eddie Dong <eddie.dong@xxxxxxxxx>
# Date 1307607849 -28800
# Node ID 002f9d4c15841dc0b98b0427a480202b7117fdcd
# Parent  c880f0642b4014b1f13b3a05ddc8ebb140c8c1a1
Emulation of guest VMPTRST

Signed-off-by: Qing He <qing.he@xxxxxxxxx>
Signed-off-by: Eddie Dong <eddie.dong@xxxxxxxxx>

diff -r c880f0642b40 -r 002f9d4c1584 xen/arch/x86/hvm/vmx/vmx.c
--- a/xen/arch/x86/hvm/vmx/vmx.c        Thu Jun 09 16:24:09 2011 +0800
+++ b/xen/arch/x86/hvm/vmx/vmx.c        Thu Jun 09 16:24:09 2011 +0800
@@ -2449,11 +2449,15 @@ asmlinkage void vmx_vmexit_handler(struc
             update_guest_eip();
         break;
 
+    case EXIT_REASON_VMPTRST:
+        if ( nvmx_handle_vmptrst(regs) == X86EMUL_OKAY )
+            update_guest_eip();
+        break;
+
     case EXIT_REASON_MWAIT_INSTRUCTION:
     case EXIT_REASON_MONITOR_INSTRUCTION:
     case EXIT_REASON_VMCLEAR:
     case EXIT_REASON_VMLAUNCH:
-    case EXIT_REASON_VMPTRST:
     case EXIT_REASON_VMREAD:
     case EXIT_REASON_VMRESUME:
     case EXIT_REASON_VMWRITE:
diff -r c880f0642b40 -r 002f9d4c1584 xen/arch/x86/hvm/vmx/vvmx.c
--- a/xen/arch/x86/hvm/vmx/vvmx.c       Thu Jun 09 16:24:09 2011 +0800
+++ b/xen/arch/x86/hvm/vmx/vvmx.c       Thu Jun 09 16:24:09 2011 +0800
@@ -456,3 +456,25 @@ out:
     return X86EMUL_OKAY;
 }
 
+int nvmx_handle_vmptrst(struct cpu_user_regs *regs)
+{
+    struct vcpu *v = current;
+    struct vmx_inst_decoded decode;
+    struct nestedvcpu *nvcpu = &vcpu_nestedhvm(v);
+    unsigned long gpa = 0;
+    int rc;
+
+    rc = decode_vmx_inst(regs, &decode, &gpa, 0);
+    if ( rc != X86EMUL_OKAY )
+        return rc;
+
+    gpa = nvcpu->nv_vvmcxaddr;
+
+    rc = hvm_copy_to_guest_virt(decode.mem, &gpa, decode.len, 0);
+    if ( rc != HVMCOPY_okay )
+        return X86EMUL_EXCEPTION;
+
+    vmreturn(regs, VMSUCCEED);
+    return X86EMUL_OKAY;
+}
+
diff -r c880f0642b40 -r 002f9d4c1584 xen/include/asm-x86/hvm/vmx/vvmx.h
--- a/xen/include/asm-x86/hvm/vmx/vvmx.h        Thu Jun 09 16:24:09 2011 +0800
+++ b/xen/include/asm-x86/hvm/vmx/vvmx.h        Thu Jun 09 16:24:09 2011 +0800
@@ -154,6 +154,7 @@ void __set_vvmcs(void *vvmcs, u32 vmcs_e
 
 void nvmx_destroy_vmcs(struct vcpu *v);
 int nvmx_handle_vmptrld(struct cpu_user_regs *regs);
+int nvmx_handle_vmptrst(struct cpu_user_regs *regs);
 
 #endif /* __ASM_X86_HVM_VVMX_H__ */
 

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