@@ -464,6 +464,14 @@ typedef struct CXLDCRegion {
unsigned long *blk_bitmap;
} CXLDCRegion;
+typedef struct CXLSetFeatureInfo {
+ QemuUUID uuid;
+ uint8_t data_transfer_flag;
+ bool data_saved_across_reset;
+ uint16_t data_offset;
+ size_t data_size;
+} CXLSetFeatureInfo;
+
struct CXLType3Dev {
/* Private */
PCIDevice parent_obj;
@@ -501,6 +509,8 @@ struct CXLType3Dev {
CXLPoisonList scan_media_results;
bool scan_media_hasrun;
+ CXLSetFeatureInfo set_feat_info;
+
struct dynamic_capacity {
HostMemoryBackend *host_dc;
AddressSpace host_dc_as;
@@ -69,6 +69,10 @@ enum {
LOGS = 0x04,
#define GET_SUPPORTED 0x0
#define GET_LOG 0x1
+ FEATURES = 0x05,
+ #define GET_SUPPORTED 0x0
+ #define GET_FEATURE 0x1
+ #define SET_FEATURE 0x2
IDENTIFY = 0x40,
#define MEMORY_DEVICE 0x0
CCLS = 0x41,
@@ -772,6 +776,248 @@ static CXLRetCode cmd_logs_get_log(const struct cxl_cmd *cmd,
return CXL_MBOX_SUCCESS;
}
+/* CXL r3.1 section 8.2.9.6: Features */
+/*
+ * Get Supported Features output payload
+ * CXL r3.1 section 8.2.9.6.1 Table 8-96
+ */
+typedef struct CXLSupportedFeatureHeader {
+ uint16_t entries;
+ uint16_t nsuppfeats_dev;
+ uint32_t reserved;
+} QEMU_PACKED CXLSupportedFeatureHeader;
+
+/*
+ * Get Supported Features Supported Feature Entry
+ * CXL r3.1 section 8.2.9.6.1 Table 8-97
+ */
+typedef struct CXLSupportedFeatureEntry {
+ QemuUUID uuid;
+ uint16_t feat_index;
+ uint16_t get_feat_size;
+ uint16_t set_feat_size;
+ uint32_t attr_flags;
+ uint8_t get_feat_version;
+ uint8_t set_feat_version;
+ uint16_t set_feat_effects;
+ uint8_t rsvd[18];
+} QEMU_PACKED CXLSupportedFeatureEntry;
+
+/*
+ * Get Supported Features Supported Feature Entry
+ * CXL rev 3.1 section 8.2.9.6.1 Table 8-97
+ */
+/* Supported Feature Entry : attribute flags */
+#define CXL_FEAT_ENTRY_ATTR_FLAG_CHANGABLE BIT(0)
+#define CXL_FEAT_ENTRY_ATTR_FLAG_DEEPEST_RESET_PERSISTENCE_MASK GENMASK(3, 1)
+#define CXL_FEAT_ENTRY_ATTR_FLAG_PERSIST_ACROSS_FIRMWARE_UPDATE BIT(4)
+#define CXL_FEAT_ENTRY_ATTR_FLAG_SUPPORT_DEFAULT_SELECTION BIT(5)
+#define CXL_FEAT_ENTRY_ATTR_FLAG_SUPPORT_SAVED_SELECTION BIT(6)
+
+/* Supported Feature Entry : set feature effects */
+#define CXL_FEAT_ENTRY_SFE_CONFIG_CHANGE_COLD_RESET BIT(0)
+#define CXL_FEAT_ENTRY_SFE_IMMEDIATE_CONFIG_CHANGE BIT(1)
+#define CXL_FEAT_ENTRY_SFE_IMMEDIATE_DATA_CHANGE BIT(2)
+#define CXL_FEAT_ENTRY_SFE_IMMEDIATE_POLICY_CHANGE BIT(3)
+#define CXL_FEAT_ENTRY_SFE_IMMEDIATE_LOG_CHANGE BIT(4)
+#define CXL_FEAT_ENTRY_SFE_SECURITY_STATE_CHANGE BIT(5)
+#define CXL_FEAT_ENTRY_SFE_BACKGROUND_OPERATION BIT(6)
+#define CXL_FEAT_ENTRY_SFE_SUPPORT_SECONDARY_MAILBOX BIT(7)
+#define CXL_FEAT_ENTRY_SFE_SUPPORT_ABORT_BACKGROUND_OPERATION BIT(8)
+#define CXL_FEAT_ENTRY_SFE_CEL_VALID BIT(9)
+#define CXL_FEAT_ENTRY_SFE_CONFIG_CHANGE_CONV_RESET BIT(10)
+#define CXL_FEAT_ENTRY_SFE_CONFIG_CHANGE_CXL_RESET BIT(11)
+
+enum CXL_SUPPORTED_FEATURES_LIST {
+ CXL_FEATURE_MAX
+};
+
+/* Get Feature CXL 3.1 Spec 8.2.9.6.2 */
+/*
+ * Get Feature input payload
+ * CXL r3.1 section 8.2.9.6.2 Table 8-99
+ */
+/* Get Feature : Payload in selection */
+enum CXL_GET_FEATURE_SELECTION {
+ CXL_GET_FEATURE_SEL_CURRENT_VALUE,
+ CXL_GET_FEATURE_SEL_DEFAULT_VALUE,
+ CXL_GET_FEATURE_SEL_SAVED_VALUE,
+ CXL_GET_FEATURE_SEL_MAX
+};
+
+/* Set Feature CXL 3.1 Spec 8.2.9.6.3 */
+/*
+ * Set Feature input payload
+ * CXL r3.1 section 8.2.9.6.3 Table 8-101
+ */
+typedef struct CXLSetFeatureInHeader {
+ QemuUUID uuid;
+ uint32_t flags;
+ uint16_t offset;
+ uint8_t version;
+ uint8_t rsvd[9];
+} QEMU_PACKED QEMU_ALIGNED(16) CXLSetFeatureInHeader;
+
+/* Set Feature : Payload in flags */
+#define CXL_SET_FEATURE_FLAG_DATA_TRANSFER_MASK 0x7
+enum CXL_SET_FEATURE_FLAG_DATA_TRANSFER {
+ CXL_SET_FEATURE_FLAG_FULL_DATA_TRANSFER,
+ CXL_SET_FEATURE_FLAG_INITIATE_DATA_TRANSFER,
+ CXL_SET_FEATURE_FLAG_CONTINUE_DATA_TRANSFER,
+ CXL_SET_FEATURE_FLAG_FINISH_DATA_TRANSFER,
+ CXL_SET_FEATURE_FLAG_ABORT_DATA_TRANSFER,
+ CXL_SET_FEATURE_FLAG_DATA_TRANSFER_MAX
+};
+#define CXL_SET_FEAT_DATA_SAVED_ACROSS_RESET BIT(3)
+
+/* CXL r3.1 section 8.2.9.6.1: Get Supported Features (Opcode 0500h) */
+static CXLRetCode cmd_features_get_supported(const struct cxl_cmd *cmd,
+ uint8_t *payload_in,
+ size_t len_in,
+ uint8_t *payload_out,
+ size_t *len_out,
+ CXLCCI *cci)
+{
+ struct {
+ uint32_t count;
+ uint16_t start_index;
+ uint16_t reserved;
+ } QEMU_PACKED QEMU_ALIGNED(16) * get_feats_in = (void *)payload_in;
+
+ struct {
+ CXLSupportedFeatureHeader hdr;
+ CXLSupportedFeatureEntry feat_entries[];
+ } QEMU_PACKED QEMU_ALIGNED(16) * get_feats_out = (void *)payload_out;
+ uint16_t index, req_entries;
+ uint16_t entry;
+
+ if (!object_dynamic_cast(OBJECT(cci->d), TYPE_CXL_TYPE3)) {
+ return CXL_MBOX_UNSUPPORTED;
+ }
+ if (get_feats_in->count < sizeof(CXLSupportedFeatureHeader) ||
+ /*
+ * Temporary: suppress compiler error due to unsigned
+ * comparioson to zero.
+ */
+ true /*get_feats_in->start_index >= CXL_FEATURE_MAX*/) {
+ return CXL_MBOX_INVALID_INPUT;
+ }
+
+ req_entries = (get_feats_in->count -
+ sizeof(CXLSupportedFeatureHeader)) /
+ sizeof(CXLSupportedFeatureEntry);
+ req_entries = MIN(req_entries,
+ (CXL_FEATURE_MAX - get_feats_in->start_index));
+
+ for (entry = 0, index = get_feats_in->start_index;
+ entry < req_entries; index++) {
+ switch (index) {
+ default:
+ __builtin_unreachable();
+ }
+ }
+ get_feats_out->hdr.nsuppfeats_dev = CXL_FEATURE_MAX;
+ get_feats_out->hdr.entries = req_entries;
+ *len_out = sizeof(CXLSupportedFeatureHeader) +
+ req_entries * sizeof(CXLSupportedFeatureEntry);
+
+ return CXL_MBOX_SUCCESS;
+}
+
+/* CXL r3.1 section 8.2.9.6.2: Get Feature (Opcode 0501h) */
+static CXLRetCode cmd_features_get_feature(const struct cxl_cmd *cmd,
+ uint8_t *payload_in,
+ size_t len_in,
+ uint8_t *payload_out,
+ size_t *len_out,
+ CXLCCI *cci)
+{
+ struct {
+ QemuUUID uuid;
+ uint16_t offset;
+ uint16_t count;
+ uint8_t selection;
+ } QEMU_PACKED QEMU_ALIGNED(16) * get_feature;
+ uint16_t bytes_to_copy = 0;
+ CXLType3Dev *ct3d;
+ CXLSetFeatureInfo *set_feat_info;
+
+ if (!object_dynamic_cast(OBJECT(cci->d), TYPE_CXL_TYPE3)) {
+ return CXL_MBOX_UNSUPPORTED;
+ }
+
+ ct3d = CXL_TYPE3(cci->d);
+ get_feature = (void *)payload_in;
+
+ set_feat_info = &ct3d->set_feat_info;
+ if (qemu_uuid_is_equal(&get_feature->uuid, &set_feat_info->uuid)) {
+ return CXL_MBOX_FEATURE_TRANSFER_IN_PROGRESS;
+ }
+
+ if (get_feature->selection != CXL_GET_FEATURE_SEL_CURRENT_VALUE) {
+ return CXL_MBOX_UNSUPPORTED;
+ }
+ if (get_feature->offset + get_feature->count > cci->payload_max) {
+ return CXL_MBOX_INVALID_INPUT;
+ }
+
+ *len_out = bytes_to_copy;
+
+ return CXL_MBOX_SUCCESS;
+}
+
+/* CXL r3.1 section 8.2.9.6.3: Set Feature (Opcode 0502h) */
+static CXLRetCode cmd_features_set_feature(const struct cxl_cmd *cmd,
+ uint8_t *payload_in,
+ size_t len_in,
+ uint8_t *payload_out,
+ size_t *len_out,
+ CXLCCI *cci)
+{
+ CXLSetFeatureInHeader *hdr = (void *)payload_in;
+ CXLSetFeatureInfo *set_feat_info;
+ uint8_t data_transfer_flag;
+ CXLType3Dev *ct3d;
+
+
+ if (!object_dynamic_cast(OBJECT(cci->d), TYPE_CXL_TYPE3)) {
+ return CXL_MBOX_UNSUPPORTED;
+ }
+ ct3d = CXL_TYPE3(cci->d);
+ set_feat_info = &ct3d->set_feat_info;
+
+ if (!qemu_uuid_is_null(&set_feat_info->uuid) &&
+ !qemu_uuid_is_equal(&hdr->uuid, &set_feat_info->uuid)) {
+ return CXL_MBOX_FEATURE_TRANSFER_IN_PROGRESS;
+ }
+ if (hdr->flags & CXL_SET_FEAT_DATA_SAVED_ACROSS_RESET) {
+ set_feat_info->data_saved_across_reset = true;
+ } else {
+ set_feat_info->data_saved_across_reset = false;
+ }
+
+ data_transfer_flag =
+ hdr->flags & CXL_SET_FEATURE_FLAG_DATA_TRANSFER_MASK;
+ if (data_transfer_flag == CXL_SET_FEATURE_FLAG_INITIATE_DATA_TRANSFER) {
+ set_feat_info->uuid = hdr->uuid;
+ set_feat_info->data_size = 0;
+ }
+ set_feat_info->data_transfer_flag = data_transfer_flag;
+ set_feat_info->data_offset = hdr->offset;
+
+ if (data_transfer_flag == CXL_SET_FEATURE_FLAG_FULL_DATA_TRANSFER ||
+ data_transfer_flag == CXL_SET_FEATURE_FLAG_FINISH_DATA_TRANSFER ||
+ data_transfer_flag == CXL_SET_FEATURE_FLAG_ABORT_DATA_TRANSFER) {
+ memset(&set_feat_info->uuid, 0, sizeof(QemuUUID));
+ set_feat_info->data_transfer_flag = 0;
+ set_feat_info->data_saved_across_reset = false;
+ set_feat_info->data_offset = 0;
+ set_feat_info->data_size = 0;
+ }
+
+ return CXL_MBOX_SUCCESS;
+}
+
/* CXL r3.1 Section 8.2.9.9.1.1: Identify Memory Device (Opcode 4000h) */
static CXLRetCode cmd_identify_memory_device(const struct cxl_cmd *cmd,
uint8_t *payload_in,
@@ -2121,6 +2367,18 @@ static const struct cxl_cmd cxl_cmd_set[256][256] = {
[LOGS][GET_SUPPORTED] = { "LOGS_GET_SUPPORTED", cmd_logs_get_supported,
0, 0 },
[LOGS][GET_LOG] = { "LOGS_GET_LOG", cmd_logs_get_log, 0x18, 0 },
+ [FEATURES][GET_SUPPORTED] = { "FEATURES_GET_SUPPORTED",
+ cmd_features_get_supported, 0x8, 0 },
+ [FEATURES][GET_FEATURE] = { "FEATURES_GET_FEATURE",
+ cmd_features_get_feature, 0x15, 0 },
+ [FEATURES][SET_FEATURE] = { "FEATURES_SET_FEATURE",
+ cmd_features_set_feature,
+ ~0,
+ (CXL_MBOX_IMMEDIATE_CONFIG_CHANGE |
+ CXL_MBOX_IMMEDIATE_DATA_CHANGE |
+ CXL_MBOX_IMMEDIATE_POLICY_CHANGE |
+ CXL_MBOX_IMMEDIATE_LOG_CHANGE |
+ CXL_MBOX_SECURITY_STATE_CHANGE)},
[IDENTIFY][MEMORY_DEVICE] = { "IDENTIFY_MEMORY_DEVICE",
cmd_identify_memory_device, 0, 0 },
[CCLS][GET_PARTITION_INFO] = { "CCLS_GET_PARTITION_INFO",