aspeed/smc: Cache AspeedSMCClass

Store a reference on the AspeedSMC class under the flash object and
use it when accessing the flash contents. Avoiding the class cast
checkers in these hot paths improves performance by 10% when running
the aspeed avocado tests.

Message-Id: <20220923084803.498337-7-clg@kaod.org>
Signed-off-by: Cédric Le Goater <clg@kaod.org>

1 files changed, 2 insertions, 0 deletions

diff --git a/include/hw/ssi/aspeed_smc.h b/include/hw/ssi/aspeed_smc.h
index 2d5f8f3d8f..8e1dda556b 100644
--- a/include/hw/ssi/aspeed_smc.h
+++ b/include/hw/ssi/aspeed_smc.h
@@ -30,6 +30,7 @@
 #include "qom/object.h"
 
 struct AspeedSMCState;
+struct AspeedSMCClass;
 
 #define TYPE_ASPEED_SMC_FLASH "aspeed.smc.flash"
 OBJECT_DECLARE_SIMPLE_TYPE(AspeedSMCFlash, ASPEED_SMC_FLASH)
@@ -37,6 +38,7 @@ struct AspeedSMCFlash {
     SysBusDevice parent_obj;
 
     struct AspeedSMCState *controller;
+    struct AspeedSMCClass *asc;
     uint8_t cs;
 
     MemoryRegion mmio;