[Xen-changelog] [xen-unstable] nested vmx: emulate IA32_VMX_MISC MSR

[Xen patchbot-unstable <patchbot@xxxxxxx>]

# HG changeset patch
# User Dongxiao Xu <dongxiao.xu@xxxxxxxxx>
# Date 1357638139 -3600
# Node ID d5eb414fb0fbaece49b5040dba7df23fe3cb7b12
# Parent  5e105c5c036dedc21aa62e2c847371839c253cf1
nested vmx: emulate IA32_VMX_MISC MSR

Use the host value to emulate IA32_VMX_MISC MSR for L1 VMM.
For CR3-target value, we don't support this feature currently and
set the number to zero.

Signed-off-by: Dongxiao Xu <dongxiao.xu@xxxxxxxxx>
Committed-by: Jan Beulich <jbeulich@xxxxxxxx>
---


diff -r 5e105c5c036d -r d5eb414fb0fb xen/arch/x86/hvm/vmx/vvmx.c
--- a/xen/arch/x86/hvm/vmx/vvmx.c       Tue Jan 08 10:37:38 2013 +0100
+++ b/xen/arch/x86/hvm/vmx/vvmx.c       Tue Jan 08 10:42:19 2013 +0100
@@ -1462,7 +1462,8 @@ int nvmx_msr_read_intercept(unsigned int
         data = 0x267ff & ~X86_CR4_SMXE;
         break;
     case MSR_IA32_VMX_MISC:
-        gdprintk(XENLOG_WARNING, "VMX MSR %x not fully supported yet.\n", msr);
+        /* Do not support CR3-target feature now */
+        data = host_data & ~VMX_MISC_CR3_TARGET;
         break;
     default:
         r = 0;
diff -r 5e105c5c036d -r d5eb414fb0fb xen/include/asm-x86/hvm/vmx/vmcs.h
--- a/xen/include/asm-x86/hvm/vmx/vmcs.h        Tue Jan 08 10:37:38 2013 +0100
+++ b/xen/include/asm-x86/hvm/vmx/vmcs.h        Tue Jan 08 10:42:19 2013 +0100
@@ -209,6 +209,8 @@ extern bool_t cpu_has_vmx_ins_outs_instr
 #define VMX_VPID_INVVPID_ALL_CONTEXT                        0x40000000000ULL
 #define VMX_VPID_INVVPID_SINGLE_CONTEXT_RETAINING_GLOBAL    0x80000000000ULL
 
+#define VMX_MISC_CR3_TARGET             0x1ff0000
+
 #define cpu_has_wbinvd_exiting \
     (vmx_secondary_exec_control & SECONDARY_EXEC_WBINVD_EXITING)
 #define cpu_has_vmx_virtualize_apic_accesses \

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