From 11e66a15a084cb0820dba13f4ea3b15b0512fd39 Mon Sep 17 00:00:00 2001
From: Gerd Hoffmann <kraxel@redhat.com>
Date: Wed, 6 May 2015 10:58:30 +0200
Subject: ich9: implement SMI_LOCK

Add write mask for the smi enable register, so we can disable write
access to certain bits.  Open all bits on reset.  Disable write access
to GBL_SMI_EN when SMI_LOCK (in ich9 lpc pci config space) is set.
Write access to SMI_LOCK itself is disabled too.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 include/hw/acpi/ich9.h | 1 +
 1 file changed, 1 insertion(+)

(limited to 'include/hw/acpi')

diff --git a/include/hw/acpi/ich9.h b/include/hw/acpi/ich9.h
index c2d3dba..77cc65c 100644
--- a/include/hw/acpi/ich9.h
+++ b/include/hw/acpi/ich9.h
@@ -39,6 +39,7 @@ typedef struct ICH9LPCPMRegs {
     MemoryRegion io_smi;
 
     uint32_t smi_en;
+    uint32_t smi_en_wmask;
     uint32_t smi_sts;
 
     qemu_irq irq;      /* SCI */
-- 
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