[Xen-devel] [PATCH] linux-2.6.18/x86: refuse to initialize the microcode driver in DomU

["Jan Beulich" <JBeulich@xxxxxxxx>]

Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>

--- a/arch/i386/kernel/microcode-xen.c
+++ b/arch/i386/kernel/microcode-xen.c
@@ -121,6 +121,9 @@ static int __init microcode_init (void)
 {
        int error;
 
+       if (!is_initial_xendomain())
+               return -ENODEV;
+
        error = misc_register(&microcode_dev);
        if (error) {
                printk(KERN_ERR




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