[PATCH v4 05/12] hw/hppa/lasi: Don't abort on invalid IMR value

[Helge Deller]

NetBSD initializes the LASI IMR value with 0xffffffff to disable all LASI
interrupts. This triggered an assert() and stopped the emulation.  By replacing
the check with a warning in the guest log we now allow NetBSD to boot again.

Signed-off-by: Helge Deller <deller@gmx.de>
---
 hw/hppa/lasi.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/hw/hppa/lasi.c b/hw/hppa/lasi.c
index ffcbb988b8..7b4a168468 100644
--- a/hw/hppa/lasi.c
+++ b/hw/hppa/lasi.c
@@ -11,6 +11,7 @@

 #include "qemu/osdep.h"
 #include "qemu/units.h"
+#include "qemu/log.h"
 #include "qapi/error.h"
 #include "cpu.h"
 #include "trace.h"
@@ -170,8 +171,10 @@ static MemTxResult lasi_chip_write_with_attrs(void 
*opaque, hwaddr addr,
         /* read-only.  */
         break;
     case LASI_IMR:
-        s->imr = val;  /* 0x20 ?? */
-        assert((val & LASI_IRQ_BITS) == val);
+        s->imr = val;
+        if (((val & LASI_IRQ_BITS) != val) && (val != 0xffffffff))
+            qemu_log_mask(LOG_GUEST_ERROR,
+                "LASI: tried to set invalid %lx IMR value.\n", val);
         break;
     case LASI_IPR:
         /* Any write to IPR clears the register. */
--
2.21.3