diff mbox series

[v7,01/12] hw/cxl/cxl-mailbox-utils: Add dc_event_log_size field to output payload of identify memory device command

Message ID 20240418232902.583744-2-fan.ni@samsung.com
State New
Headers show
Series Enabling DCD emulation support in Qemu | expand

Commit Message

fan April 18, 2024, 11:10 p.m. UTC 
From: Fan Ni <fan.ni@samsung.com>

Based on CXL spec r3.1 Table 8-127 (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.

Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Fan Ni <fan.ni@samsung.com>
---
 hw/cxl/cxl-mailbox-utils.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

Comments

Gregory Price April 19, 2024, 4:40 p.m. UTC | #1 
On Thu, Apr 18, 2024 at 04:10:52PM -0700, nifan.cxl@gmail.com wrote:
> From: Fan Ni <fan.ni@samsung.com>
> 
> Based on CXL spec r3.1 Table 8-127 (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.
> 
> Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
> Signed-off-by: Fan Ni <fan.ni@samsung.com>
> ---
>  hw/cxl/cxl-mailbox-utils.c | 5 ++++-
>  1 file changed, 4 insertions(+), 1 deletion(-)
> 

Reviewed-by: Gregory Price <gregory.price@memverge.com>
diff mbox series

Patch

diff --git a/hw/cxl/cxl-mailbox-utils.c b/hw/cxl/cxl-mailbox-utils.c
index 4bcd727f4c..ba1d9901df 100644
--- a/hw/cxl/cxl-mailbox-utils.c
+++ b/hw/cxl/cxl-mailbox-utils.c
@@ -21,6 +21,7 @@ 
 #include "sysemu/hostmem.h"
 
 #define CXL_CAPACITY_MULTIPLIER   (256 * MiB)
+#define CXL_DC_EVENT_LOG_SIZE 8
 
 /*
  * How to add a new command, example. The command set FOO, with cmd BAR.
@@ -780,8 +781,9 @@  static CXLRetCode cmd_identify_memory_device(const 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 = CXL_TYPE3(cci->d);
     CXLType3Class *cvc = CXL_TYPE3_GET_CLASS(ct3d);
     CXLDeviceState *cxl_dstate = &ct3d->cxl_dstate;
@@ -807,6 +809,7 @@  static CXLRetCode cmd_identify_memory_device(const 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_out = sizeof(*id);
     return CXL_MBOX_SUCCESS;