Detect vmm(4) in the bootloader and automatically switch to the serial

console at 115200 baud.

tested by phessler and myself, ok deraadt

diff --git a/sys/arch/amd64/stand/boot/conf.c b/sys/arch/amd64/stand/boot/conf.c
index 0154b0b..37c1ffe 100644 (file)
--- a/sys/arch/amd64/stand/boot/conf.c
+++ b/sys/arch/amd64/stand/boot/conf.c
@@ -1,4 +1,4 @@
-/*     $OpenBSD: conf.c,v 1.40 2018/04/18 16:34:58 deraadt Exp $       */
+/*     $OpenBSD: conf.c,v 1.41 2018/07/11 14:48:40 mlarkin Exp $       */
 
 /*
  * Copyright (c) 1996 Michael Shalayeff
@@ -40,7 +40,7 @@
 #include <biosdev.h>
 #include <dev/cons.h>
 
-const char version[] = "3.39";
+const char version[] = "3.40";
 int    debug = 1;
 
 

diff --git a/sys/arch/amd64/stand/cdboot/conf.c b/sys/arch/amd64/stand/cdboot/conf.c
index 7eaae57..41f976f 100644 (file)
--- a/sys/arch/amd64/stand/cdboot/conf.c
+++ b/sys/arch/amd64/stand/cdboot/conf.c
@@ -1,4 +1,4 @@
-/*     $OpenBSD: conf.c,v 1.35 2018/04/18 16:34:58 deraadt Exp $       */
+/*     $OpenBSD: conf.c,v 1.36 2018/07/11 14:48:40 mlarkin Exp $       */
 
 /*
  * Copyright (c) 2004 Tom Cosgrove
@@ -41,7 +41,7 @@
 #include <biosdev.h>
 #include <dev/cons.h>
 
-const char version[] = "3.39";
+const char version[] = "3.40";
 int    debug = 1;
 
 

diff --git a/sys/arch/amd64/stand/libsa/machdep.c b/sys/arch/amd64/stand/libsa/machdep.c
index c6664ba..246cda5 100644 (file)
--- a/sys/arch/amd64/stand/libsa/machdep.c
+++ b/sys/arch/amd64/stand/libsa/machdep.c
@@ -1,4 +1,4 @@
-/*     $OpenBSD: machdep.c,v 1.6 2015/09/18 13:30:56 miod Exp $        */
+/*     $OpenBSD: machdep.c,v 1.7 2018/07/11 14:48:40 mlarkin Exp $     */
 
 /*
  * Copyright (c) 2004 Tom Cosgrove
@@ -31,6 +31,8 @@
 #include "biosdev.h"
 #include <machine/apmvar.h>
 #include <machine/biosvar.h>
+#include <machine/specialreg.h>
+#include <machine/vmmvar.h>
 
 #ifdef EFIBOOT
 #include "efiboot.h"
@@ -44,11 +46,15 @@ volatile struct BIOS_regs   BIOS_regs;
 #define CKPT(c) /* c */
 #endif
 
+const char *vmm_hv_signature = VMM_HV_SIGNATURE;
+
 void
 machdep(void)
 {
-       int i, j;
+       int i, j, vmm = 0;
        struct i386_boot_probes *pr;
+       uint32_t dummy, ebx, ecx, edx;
+       dev_t dev;
 
        /*
         * The list of probe routines is now in conf.c.
@@ -65,6 +71,22 @@ machdep(void)
                        printf("\n");
                }
        }
+
+       CPUID(0x1, dummy, dummy, ecx, dummy);
+       if (ecx & CPUIDECX_HV) {
+               CPUID(0x40000000, dummy, ebx, ecx, edx);
+               if (memcmp(&ebx, &vmm_hv_signature[0], sizeof(uint32_t)) == 0 &&
+                   memcmp(&ecx, &vmm_hv_signature[4], sizeof(uint32_t)) == 0 &&
+                   memcmp(&edx, &vmm_hv_signature[8], sizeof(uint32_t)) == 0)
+                       vmm = 1;
+       }
+
+       /* Set console to com0/115200 by default in vmm */
+       if (vmm) {
+               dev = ttydev("com0");
+               cnspeed(dev, 115200);
+               cnset(dev);
+       }
 }
 
 int

diff --git a/sys/arch/amd64/stand/pxeboot/conf.c b/sys/arch/amd64/stand/pxeboot/conf.c
index fd4103a..4d40f45 100644 (file)
--- a/sys/arch/amd64/stand/pxeboot/conf.c
+++ b/sys/arch/amd64/stand/pxeboot/conf.c
@@ -1,4 +1,4 @@
-/*     $OpenBSD: conf.c,v 1.39 2018/04/18 16:34:58 deraadt Exp $       */
+/*     $OpenBSD: conf.c,v 1.40 2018/07/11 14:48:40 mlarkin Exp $       */
 
 /*
  * Copyright (c) 2004 Tom Cosgrove
@@ -43,7 +43,7 @@
 #include "pxeboot.h"
 #include "pxe_net.h"
 
-const char version[] = "3.39";
+const char version[] = "3.40";
 int    debug = 0;
 
 void (*sa_cleanup)(void) = pxe_shutdown;