OS-7125 Need mitigation of L1TF (CVE-2018-3646)
Reviewed by: Robert Mustacchi <rm@joyent.com>
Reviewed by: Jerry Jelinek <jerry.jelinek@joyent.com>

*** 80,89 ****
--- 80,90 ----
  #include <sys/x_call.h>
  #include <sys/reboot.h>
  #include <sys/hpet.h>
  #include <sys/apic_common.h>
  #include <sys/apic_timer.h>
+ #include <sys/ht.h>
  
  /*
   *      Local Function Prototypes
   */
  static void apic_init_intr(void);
*** 298,307 ****
--- 299,313 ----
          for (; j < MAXIPL + 1; j++)
                  /* fill up any empty ipltopri slots */
                  apic_ipltopri[j] = (i << APIC_IPL_SHIFT) + APIC_BASE_VECT;
          apic_init_common();
  
+         /*
+          * For pcplusmp, we'll keep things simple and always disable this.
+          */
+         ht_intr_alloc_pil(XC_CPUPOKE_PIL);
+ 
          apic_pir_vect = apic_get_ipivect(XC_CPUPOKE_PIL, -1);
  
  #if !defined(__amd64)
          if (cpuid_have_cr8access(CPU))
                  apic_have_32bit_cr8 = 1;