# HG changeset patch
# User Eddie Dong <eddie.dong@xxxxxxxxx>
# Date 1307003600 -28800
# Node ID 4631a951120093ade781c4f4542741266b615576
# Parent 16e0e95f457e9b3f8ff0528c8f2b0f88b1c41109
Emulation of guest VMREAD
Signed-off-by: Qing He <qing.he@xxxxxxxxx>
Signed-off-by: Eddie Dong <eddie.dong@xxxxxxxxx>
diff -r 16e0e95f457e -r 4631a9511200 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
@@ -2459,6 +2459,11 @@ asmlinkage void vmx_vmexit_handler(struc
update_guest_eip();
break;
+ case EXIT_REASON_VMREAD:
+ if ( nvmx_handle_vmread(regs) == X86EMUL_OKAY )
+ update_guest_eip();
+ break;
+
case EXIT_REASON_VMWRITE:
if ( nvmx_handle_vmwrite(regs) == X86EMUL_OKAY )
update_guest_eip();
@@ -2467,7 +2472,6 @@ asmlinkage void vmx_vmexit_handler(struc
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_GETSEC:
case EXIT_REASON_INVEPT:
diff -r 16e0e95f457e -r 4631a9511200 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
@@ -121,6 +121,8 @@ enum vmx_ops_result {
VMFAIL_INVALID,
};
+#define CASE_SET_REG(REG, reg) \
+ case VMX_REG_ ## REG: regs->reg = value; break
#define CASE_GET_REG(REG, reg) \
case VMX_REG_ ## REG: value = regs->reg; break
@@ -233,6 +235,32 @@ static unsigned long reg_read(struct cpu
return value;
}
+static void reg_write(struct cpu_user_regs *regs,
+ enum vmx_regs_enc index,
+ unsigned long value)
+{
+ switch ( index ) {
+ CASE_SET_REG(RAX, eax);
+ CASE_SET_REG(RCX, ecx);
+ CASE_SET_REG(RDX, edx);
+ CASE_SET_REG(RBX, ebx);
+ CASE_SET_REG(RBP, ebp);
+ CASE_SET_REG(RSI, esi);
+ CASE_SET_REG(RDI, edi);
+ CASE_SET_REG(RSP, esp);
+ CASE_SET_REG(R8, r8);
+ CASE_SET_REG(R9, r9);
+ CASE_SET_REG(R10, r10);
+ CASE_SET_REG(R11, r11);
+ CASE_SET_REG(R12, r12);
+ CASE_SET_REG(R13, r13);
+ CASE_SET_REG(R14, r14);
+ CASE_SET_REG(R15, r15);
+ default:
+ break;
+ }
+}
+
static int vmx_inst_check_privilege(struct cpu_user_regs *regs, int
vmxop_check)
{
struct vcpu *v = current;
@@ -568,6 +596,35 @@ out:
return X86EMUL_OKAY;
}
+int nvmx_handle_vmread(struct cpu_user_regs *regs)
+{
+ struct vcpu *v = current;
+ struct vmx_inst_decoded decode;
+ struct nestedvcpu *nvcpu = &vcpu_nestedhvm(v);
+ u64 value = 0;
+ int rc;
+
+ rc = decode_vmx_inst(regs, &decode, NULL, 0);
+ if ( rc != X86EMUL_OKAY )
+ return rc;
+
+ value = __get_vvmcs(nvcpu->nv_vvmcx, reg_read(regs, decode.reg2));
+
+ switch ( decode.type ) {
+ case VMX_INST_MEMREG_TYPE_MEMORY:
+ rc = hvm_copy_to_guest_virt(decode.mem, &value, decode.len, 0);
+ if ( rc != HVMCOPY_okay )
+ return X86EMUL_EXCEPTION;
+ break;
+ case VMX_INST_MEMREG_TYPE_REG:
+ reg_write(regs, decode.reg1, value);
+ break;
+ }
+
+ vmreturn(regs, VMSUCCEED);
+ return X86EMUL_OKAY;
+}
+
int nvmx_handle_vmwrite(struct cpu_user_regs *regs)
{
struct vcpu *v = current;
diff -r 16e0e95f457e -r 4631a9511200 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_vmread(struct cpu_user_regs *regs);
int nvmx_handle_vmwrite(struct cpu_user_regs *regs);
#endif /* __ASM_X86_HVM_VVMX_H__ */
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