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ich9: implement SMI_LOCK

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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>
This commit is contained in:
Gerd Hoffmann 2015-05-06 10:58:30 +02:00 • committed by Paolo Bonzini
parent bafc90bdc5
commit 11e66a15a0
4 changed files with 29 additions and 1 deletions
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1
include/hw/acpi/ich9.h
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@ -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 */