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ich9, piix4: add property, smm-compat, to keep compatibility of SMM

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The following patch will introduce incompatible behavior of SMM.
Introduce a property to keep the old behavior for compatibility.
To enable smm compat, use "-global ICH9-LPC.smm-compat=on" or
"-global PIIX4_PM.smm-compat=on"

Suggested-by: Igor Mammedov <imammedo@redhat.com>
Signed-off-by: Isaku Yamahata <isaku.yamahata@intel.com>
Message-Id: <47254ae0b8c6cc6945422978b6b2af2d213ef891.1613615732.git.isaku.yamahata@intel.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
This commit is contained in:
Isaku Yamahata 2021-02-17 21:51:11 -08:00 • committed by Michael S. Tsirkin
parent 7995d9a399
commit 24cd04fce0
3 changed files with 4 additions and 0 deletions
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1
include/hw/acpi/ich9.h
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@ -59,6 +59,7 @@ typedef struct ICH9LPCPMRegs {
uint8_t disable_s4;
uint8_t s4_val;
uint8_t smm_enabled;
bool smm_compat;
bool enable_tco;
TCOIORegs tco_regs;
} ICH9LPCPMRegs;