File 5a5e459c-1-x86-SVM-offer-CPUID-faulting-to-AMD-... of Package xen

Overview Repositories Revisions Requests Users Attributes Meta

File 5a5e459c-1-x86-SVM-offer-CPUID-faulting-to-AMD-HVM-guests.patch of Package xen (Revision 53f017217d750d8903a37544fbff23d5)

Currently displaying revision 53f017217d750d8903a37544fbff23d5 , Show latest

# Commit b7af6be266e3595d7fb925f6156d6732dc456df6
# Date 2018-01-16 18:34:04 +0000
# Author Andrew Cooper <andrew.cooper3@citrix.com>
# Committer Wei Liu <wei.liu2@citrix.com>
x86/svm: Offer CPUID Faulting to AMD HVM guests as well

CPUID Faulting can be virtulised for HVM guests without hardware support,
meaning it can be offered to SVM guests.

Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>

--- a/xen/arch/x86/hvm/svm/svm.c
+++ b/xen/arch/x86/hvm/svm/svm.c
@@ -1784,6 +1784,12 @@ static void svm_vmexit_do_cpuid(struct c
     if ( (inst_len = __get_instruction_length(curr, INSTR_CPUID)) == 0 )
         return;
 
+    if ( hvm_check_cpuid_faulting(curr) )
+    {
+        hvm_inject_hw_exception(TRAP_gp_fault, 0);
+        return;
+    }
+
     guest_cpuid(curr, regs->eax, regs->ecx, &res);
     HVMTRACE_5D(CPUID, regs->eax, res.a, res.b, res.c, res.d);
 
--- a/xen/arch/x86/msr.c
+++ b/xen/arch/x86/msr.c
@@ -39,7 +39,8 @@ static void __init calculate_hvm_max_pol
         return;
 
     /* 0x000000ce  MSR_INTEL_PLATFORM_INFO */
-    if ( boot_cpu_data.x86_vendor == X86_VENDOR_INTEL )
+    if ( boot_cpu_data.x86_vendor == X86_VENDOR_INTEL ||
+         boot_cpu_data.x86_vendor == X86_VENDOR_AMD )
     {
         dp->plaform_info.available = true;
         dp->plaform_info.cpuid_faulting = true;

Places

File 5a5e459c-1-x86-SVM-offer-CPUID-faulting-to-AMD-HVM-guests.patch of Package xen (Revision 53f017217d750d8903a37544fbff23d5)

Places