Change in coreboot[master]: soc/amd/common/block: Add mainboard_handle_smi

[Felix Held (Code Review)]

Felix Held has submitted this change. ( https://review.coreboot.org/c/coreboot/+/62598 )

Change subject: soc/amd/common/block: Add mainboard_handle_smi
......................................................................

soc/amd/common/block: Add mainboard_handle_smi

The current SMM framework only allows the mainboard code to handle GPEs.
i.e., Events 0 - 23. This change allows the mainboard code to handle any
SMI events not handled by the SoC code. This will allow the mainboard
code to handle `SMITYPE_ESPI_SMI`.

BUG=b:222694093
TEST=Build guybrush

Signed-off-by: Raul E Rangel 
Change-Id: I81943e8cb31e998f29cc60b565d3ca0a8dfe9cb2
Reviewed-on: https://review.coreboot.org/c/coreboot/+/62598
Tested-by: build bot (Jenkins) 
Reviewed-by: Karthik Ramasubramanian 
Reviewed-by: Felix Held 
---
M src/soc/amd/common/block/cpu/smm/smi_handler.c
M src/soc/amd/common/block/include/amdblocks/smm.h
2 files changed, 9 insertions(+), 0 deletions(-)

Approvals:
  build bot (Jenkins): Verified
  Felix Held: Looks good to me, but someone else must approve
  Karthik Ramasubramanian: Looks good to me, approved

diff --git a/src/soc/amd/common/block/cpu/smm/smi_handler.c b/src/soc/amd/common/block/cpu/smm/smi_handler.c
index e535cb0..ee8423a 100644
--- a/src/soc/amd/common/block/cpu/smm/smi_handler.c
+++ b/src/soc/amd/common/block/cpu/smm/smi_handler.c
@@ -7,6 +7,11 @@
 #include <cpu/x86/smm.h>
 #include <soc/smi.h>

+__weak void mainboard_handle_smi(int event)
+{
+	printk(BIOS_WARNING, "SMI event %d is missing handler\n", event);
+}
+
 static void process_smi_sources(uint32_t reg)
 {
    const uint32_t status = smi_read32(reg);
@@ -19,6 +24,8 @@
    		source_handler = get_smi_source_handler(i + bit_zero);
    		if (source_handler)
    			source_handler();
+			else if (reg != SMI_REG_SMISTS0 || (status & GEVENT_MASK) == 0)
+				mainboard_handle_smi(i + bit_zero);
    	}
    }

diff --git a/src/soc/amd/common/block/include/amdblocks/smm.h b/src/soc/amd/common/block/include/amdblocks/smm.h
index 187eddf..46008fa 100644
--- a/src/soc/amd/common/block/include/amdblocks/smm.h
+++ b/src/soc/amd/common/block/include/amdblocks/smm.h
@@ -14,3 +14,5 @@
 void handle_smi_gsmi(void);
 void handle_smi_store(void);
 void clear_tvalid(void);
+/* See SMITYPE_* for list possible of events. GEVENTS are handled with mainboard_smi_gpi. */
+void mainboard_handle_smi(int event);