[Xen-devel] [PATCH 10 of 20] Emulation of guest VMWRITE

[Eddie Dong <eddie.dong@xxxxxxxxx>]

# HG changeset patch
# User Eddie Dong <eddie.dong@xxxxxxxxx>
# Date 1307003600 -28800
# Node ID 16e0e95f457e9b3f8ff0528c8f2b0f88b1c41109
# Parent  35cc736e8a75a0a349790871232f8761ceae41be
Emulation of guest VMWRITE

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

diff -r 35cc736e8a75 -r 16e0e95f457e xen/arch/x86/hvm/vmx/vmx.c
--- a/xen/arch/x86/hvm/vmx/vmx.c        Thu Jun 02 16:33:20 2011 +0800
+++ b/xen/arch/x86/hvm/vmx/vmx.c        Thu Jun 02 16:33:20 2011 +0800
@@ -2459,12 +2459,16 @@ asmlinkage void vmx_vmexit_handler(struc
             update_guest_eip();
         break;
 
+    case EXIT_REASON_VMWRITE:
+        if ( nvmx_handle_vmwrite(regs) == X86EMUL_OKAY )
+            update_guest_eip();
+        break;
+
     case EXIT_REASON_MWAIT_INSTRUCTION:
     case EXIT_REASON_MONITOR_INSTRUCTION:
     case EXIT_REASON_VMLAUNCH:
     case EXIT_REASON_VMREAD:
     case EXIT_REASON_VMRESUME:
-    case EXIT_REASON_VMWRITE:
     case EXIT_REASON_GETSEC:
     case EXIT_REASON_INVEPT:
     case EXIT_REASON_INVVPID:
diff -r 35cc736e8a75 -r 16e0e95f457e xen/arch/x86/hvm/vmx/vvmx.c
--- a/xen/arch/x86/hvm/vmx/vvmx.c       Thu Jun 02 16:33:20 2011 +0800
+++ b/xen/arch/x86/hvm/vmx/vvmx.c       Thu Jun 02 16:33:20 2011 +0800
@@ -568,3 +568,27 @@ out:
     return X86EMUL_OKAY;
 }
 
+int nvmx_handle_vmwrite(struct cpu_user_regs *regs)
+{
+    struct vcpu *v = current;
+    struct vmx_inst_decoded decode;
+    struct nestedvcpu *nvcpu = &vcpu_nestedhvm(v);
+    u64 operandS, vmcs_encoding;
+
+    if ( decode_vmx_inst(regs, &decode, &operandS, 0)
+             != X86EMUL_OKAY )
+        return X86EMUL_EXCEPTION;
+
+    vmcs_encoding = reg_read(regs, decode.reg2);
+    __set_vvmcs(nvcpu->nv_vvmcx, vmcs_encoding, operandS);
+
+    if ( vmcs_encoding == IO_BITMAP_A || vmcs_encoding == IO_BITMAP_A_HIGH )
+        __map_io_bitmap (v, IO_BITMAP_A);
+    else if ( vmcs_encoding == IO_BITMAP_B || 
+              vmcs_encoding == IO_BITMAP_B_HIGH )
+        __map_io_bitmap (v, IO_BITMAP_B);
+
+    vmreturn(regs, VMSUCCEED);
+    return X86EMUL_OKAY;
+}
+
diff -r 35cc736e8a75 -r 16e0e95f457e xen/include/asm-x86/hvm/vmx/vvmx.h
--- a/xen/include/asm-x86/hvm/vmx/vvmx.h        Thu Jun 02 16:33:20 2011 +0800
+++ b/xen/include/asm-x86/hvm/vmx/vvmx.h        Thu Jun 02 16:33:20 2011 +0800
@@ -156,6 +156,7 @@ 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);
 int nvmx_handle_vmclear(struct cpu_user_regs *regs);
+int nvmx_handle_vmwrite(struct cpu_user_regs *regs);
 
 #endif /* __ASM_X86_HVM_VVMX_H__ */
 

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