diff mbox

[v2,2/4] vvmx: return VMfail to L1 if L1 vmxon is executed in VMX operation

Message ID 20161214101145.11171-3-haozhong.zhang@intel.com (mailing list archive)
State New, archived
Headers show

Commit Message

Haozhong Zhang Dec. 14, 2016, 10:11 a.m. UTC 
According to Intel SDM, section "VMXON - Enter VMX Operation", a
VMfail should be returned to L1 hypervisor if L1 vmxon is executed in
VMX operation, rather than just print a warning message.

Signed-off-by: Haozhong Zhang <haozhong.zhang@intel.com>
Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com>
Acked-by: Kevin Tian <kevin.tian@intel.com>
---
 xen/arch/x86/hvm/vmx/vvmx.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)
diff mbox

Patch

diff --git a/xen/arch/x86/hvm/vmx/vvmx.c b/xen/arch/x86/hvm/vmx/vvmx.c
index eae8150..e765b60 100644
--- a/xen/arch/x86/hvm/vmx/vvmx.c
+++ b/xen/arch/x86/hvm/vmx/vvmx.c
@@ -1390,9 +1390,12 @@  int nvmx_handle_vmxon(struct cpu_user_regs *regs)
         return rc;
 
     if ( nvmx_vcpu_in_vmx(v) )
-        gdprintk(XENLOG_WARNING, 
-                 "vmxon again: orig %"PRIpaddr" new %lx\n",
-                 nvmx->vmxon_region_pa, gpa);
+    {
+        vmreturn(regs,
+                 nvcpu->nv_vvmcxaddr != VMCX_EADDR ?
+                 VMFAIL_VALID : VMFAIL_INVALID);
+        return X86EMUL_OKAY;
+    }
 
     nvmx->vmxon_region_pa = gpa;