[1/9] hw/cxl/cxl-mailbox-utils: Add dc_event_log_size field to output payload of identify memory device command

Commit Message

[e-mail] July 20, 2023, 8:37 p.m. UTC

From: Fan Ni <[e-mail]>

Based on CXL spec 3.0 Table 8-94 (Identify Memory Device Output
Payload), dynamic capacity event log size should be part of
output of the Identify command.
Add dc_event_log_size to the output payload for the host to get the info.

Signed-off-by: Fan Ni <[e-mail]>
---
 hw/cxl/cxl-mailbox-utils.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

Patch

diff --git a/hw/cxl/cxl-mailbox-utils.c b/hw/cxl/cxl-mailbox-utils.c
index ad7a6116e4..b013e30314 100644
--- a/hw/cxl/cxl-mailbox-utils.c
+++ b/hw/cxl/cxl-mailbox-utils.c
@@ -21,6 +21,8 @@ 
 #include "sysemu/hostmem.h"
 
 #define CXL_CAPACITY_MULTIPLIER   (256 * MiB)
+/* Experimental value: dynamic capacity event log size */
+#define CXL_DC_EVENT_LOG_SIZE 8
 
 /*
  * How to add a new command, example. The command set FOO, with cmd BAR.
@@ -519,8 +521,9 @@  static CXLRetCode cmd_identify_memory_device(struct cxl_cmd *cmd,
         uint16_t inject_poison_limit;
         uint8_t poison_caps;
         uint8_t qos_telemetry_caps;
+        uint16_t dc_event_log_size;
     } QEMU_PACKED *id;
-    QEMU_BUILD_BUG_ON(sizeof(*id) != 0x43);
+    QEMU_BUILD_BUG_ON(sizeof(*id) != 0x45);
 
     CXLType3Dev *ct3d = container_of(cxl_dstate, CXLType3Dev, cxl_dstate);
     CXLType3Class *cvc = CXL_TYPE3_GET_CLASS(ct3d);
@@ -543,6 +546,7 @@  static CXLRetCode cmd_identify_memory_device(struct cxl_cmd *cmd,
     st24_le_p(id->poison_list_max_mer, 256);
     /* No limit - so limited by main poison record limit */
     stw_le_p(&id->inject_poison_limit, 0);
+    stw_le_p(&id->dc_event_log_size, CXL_DC_EVENT_LOG_SIZE);
 
     *len = sizeof(*id);
     return CXL_MBOX_SUCCESS;