[v2,2/3] hw/cxl/cxl-mailbox-utils.c: Added support for Clear Log (Opcode 0403h)

Commit Message

Arpit Kumar Feb. 18, 2025, 8:57 a.m. UTC

CXL spec 3.2 section 8.2.10.5.4 describes clear log.
It clears the content of the specified log.

Signed-off-by: Arpit Kumar <[e-mail]>
---
 hw/cxl/cxl-mailbox-utils.c | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)

Patch

diff --git a/hw/cxl/cxl-mailbox-utils.c b/hw/cxl/cxl-mailbox-utils.c
index 5b0f793ac5..1caee3f058 100644
--- a/hw/cxl/cxl-mailbox-utils.c
+++ b/hw/cxl/cxl-mailbox-utils.c
@@ -77,6 +77,7 @@  enum {
         #define GET_SUPPORTED 0x0
         #define GET_LOG       0x1
         #define GET_LOG_CAPABILITIES   0x2
+        #define CLEAR_LOG     0x3
     FEATURES    = 0x05,
         #define GET_SUPPORTED 0x0
         #define GET_FEATURE   0x1
@@ -1113,6 +1114,30 @@  static CXLRetCode cmd_logs_get_log_capabilities(const struct cxl_cmd *cmd,
     return CXL_MBOX_SUCCESS;
 }
 
+/* CXL r3.2 Section 8.2.10.5.4: Clear Log (Opcode 0403h) */
+static CXLRetCode cmd_logs_clear_log(const struct cxl_cmd *cmd,
+                                     uint8_t *payload_in,
+                                     size_t len_in,
+                                     uint8_t *payload_out,
+                                     size_t *len_out,
+                                     CXLCCI *cci)
+{
+    const CXLLogCapabilities *cap;
+    struct {
+        QemuUUID uuid;
+    } QEMU_PACKED QEMU_ALIGNED(8) * clear_log = (void *)payload_in;
+
+    cap = find_log_index(&clear_log->uuid, cci);
+    if (!cap) {
+        return CXL_MBOX_INVALID_LOG;
+    }
+
+    if (!(cap->param_flags & CXL_LOG_CAP_CLEAR_SUPPORTED)) {
+        return CXL_MBOX_UNSUPPORTED;
+    }
+    return CXL_MBOX_SUCCESS;
+}
+
 /* CXL r3.1 section 8.2.9.6: Features */
 /*
  * Get Supported Features output payload
@@ -2880,6 +2905,8 @@  static const struct cxl_cmd cxl_cmd_set[256][256] = {
     [LOGS][GET_LOG] = { "LOGS_GET_LOG", cmd_logs_get_log, 0x18, 0 },
     [LOGS][GET_LOG_CAPABILITIES] = { "LOGS_GET_LOG_CAPABILITIES",
                                      cmd_logs_get_log_capabilities, 0x10, 0 },
+    [LOGS][CLEAR_LOG] = { "LOGS_CLEAR_LOG", cmd_logs_clear_log, 0x10,
+                          CXL_MBOX_IMMEDIATE_LOG_CHANGE},
     [FEATURES][GET_SUPPORTED] = { "FEATURES_GET_SUPPORTED",
                                   cmd_features_get_supported, 0x8, 0 },
     [FEATURES][GET_FEATURE] = { "FEATURES_GET_FEATURE",