[Xen-devel] [PATCH] x86/HVM: fix AMD ECS handling for Fam 10

[Jan Beulich <jbeulich@xxxxxxxx>]

The involved comparison was, very likely inadvertently, converted from
>= to > when making changes unrelated to the actual family range.

Fixes: 9841eb71ea87 ("x86/cpuid: Drop a guests cached x86 family and model 
information")
Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>

--- a/xen/arch/x86/hvm/ioreq.c
+++ b/xen/arch/x86/hvm/ioreq.c
@@ -1284,7 +1284,7 @@ struct hvm_ioreq_server *hvm_select_iore
         if ( CF8_ADDR_HI(cf8) &&
              d->arch.cpuid->x86_vendor == X86_VENDOR_AMD &&
              (x86_fam = get_cpu_family(
-                 d->arch.cpuid->basic.raw_fms, NULL, NULL)) > 0x10 &&
+                 d->arch.cpuid->basic.raw_fms, NULL, NULL)) >= 0x10 &&
              x86_fam < 0x17 )
         {
             uint64_t msr_val;

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