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Subject: [Bug 197756] System stops booting with "ACPI APIC Table: <SECCSD
 LH43STAR>"
Date: Mon, 30 Mar 2015 17:20:10 +0000
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=197756

--- Comment #7 from John Baldwin <jhb@FreeBSD.org> ---
To be clear, something like this works for you?  (I'm just going to bump it up
to 100 to be extra safe):

Index: mp_machdep.c
===================================================================
--- mp_machdep.c    (revision 280857)
+++ mp_machdep.c    (working copy)
@@ -1084,7 +1084,7 @@ ipi_startup(int apic_id, int vector)
      */
     lapic_ipi_raw(APIC_DEST_DESTFLD | APIC_TRIGMOD_LEVEL |
         APIC_LEVEL_ASSERT | APIC_DESTMODE_PHY | APIC_DELMODE_INIT, apic_id);
-    lapic_ipi_wait(20);
+    lapic_ipi_wait(100);

     /* Explicitly deassert the INIT IPI. */
     lapic_ipi_raw(APIC_DEST_DESTFLD | APIC_TRIGMOD_LEVEL |
@@ -1104,7 +1104,7 @@ ipi_startup(int apic_id, int vector)
     lapic_ipi_raw(APIC_DEST_DESTFLD | APIC_TRIGMOD_EDGE |
         APIC_LEVEL_ASSERT | APIC_DESTMODE_PHY | APIC_DELMODE_STARTUP |
         vector, apic_id);
-    if (!lapic_ipi_wait(20))
+    if (!lapic_ipi_wait(100))
         panic("Failed to deliver first STARTUP IPI to APIC %d",
             apic_id);
     DELAY(200);        /* wait ~200uS */
@@ -1118,7 +1118,7 @@ ipi_startup(int apic_id, int vector)
     lapic_ipi_raw(APIC_DEST_DESTFLD | APIC_TRIGMOD_EDGE |
         APIC_LEVEL_ASSERT | APIC_DESTMODE_PHY | APIC_DELMODE_STARTUP |
         vector, apic_id);
-    if (!lapic_ipi_wait(20))
+    if (!lapic_ipi_wait(100))
         panic("Failed to deliver second STARTUP IPI to APIC %d",
             apic_id);

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