diff options
Diffstat (limited to 'hw/cxl/cxl-mailbox-utils.c')
| -rw-r--r-- | hw/cxl/cxl-mailbox-utils.c | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/hw/cxl/cxl-mailbox-utils.c b/hw/cxl/cxl-mailbox-utils.c index 4584aa31f7..db473135c7 100644 --- a/hw/cxl/cxl-mailbox-utils.c +++ b/hw/cxl/cxl-mailbox-utils.c @@ -47,6 +47,9 @@ enum { TIMESTAMP = 0x03, #define GET 0x0 #define SET 0x1 + LOGS = 0x04, + #define GET_SUPPORTED 0x0 + #define GET_LOG 0x1 }; /* 8.2.8.4.5.1 Command Return Codes */ @@ -147,6 +150,70 @@ static ret_code cmd_timestamp_set(struct cxl_cmd *cmd, static QemuUUID cel_uuid; +/* 8.2.9.4.1 */ +static ret_code cmd_logs_get_supported(struct cxl_cmd *cmd, + CXLDeviceState *cxl_dstate, + uint16_t *len) +{ + struct { + uint16_t entries; + uint8_t rsvd[6]; + struct { + QemuUUID uuid; + uint32_t size; + } log_entries[1]; + } QEMU_PACKED *supported_logs = (void *)cmd->payload; + QEMU_BUILD_BUG_ON(sizeof(*supported_logs) != 0x1c); + + supported_logs->entries = 1; + supported_logs->log_entries[0].uuid = cel_uuid; + supported_logs->log_entries[0].size = 4 * cxl_dstate->cel_size; + + *len = sizeof(*supported_logs); + return CXL_MBOX_SUCCESS; +} + +/* 8.2.9.4.2 */ +static ret_code cmd_logs_get_log(struct cxl_cmd *cmd, + CXLDeviceState *cxl_dstate, + uint16_t *len) +{ + struct { + QemuUUID uuid; + uint32_t offset; + uint32_t length; + } QEMU_PACKED QEMU_ALIGNED(16) *get_log = (void *)cmd->payload; + + /* + * 8.2.9.4.2 + * The device shall return Invalid Parameter if the Offset or Length + * fields attempt to access beyond the size of the log as reported by Get + * Supported Logs. + * + * XXX: Spec is wrong, "Invalid Parameter" isn't a thing. + * XXX: Spec doesn't address incorrect UUID incorrectness. + * + * The CEL buffer is large enough to fit all commands in the emulation, so + * the only possible failure would be if the mailbox itself isn't big + * enough. + */ + if (get_log->offset + get_log->length > cxl_dstate->payload_size) { + return CXL_MBOX_INVALID_INPUT; + } + + if (!qemu_uuid_is_equal(&get_log->uuid, &cel_uuid)) { + return CXL_MBOX_UNSUPPORTED; + } + + /* Store off everything to local variables so we can wipe out the payload */ + *len = get_log->length; + + memmove(cmd->payload, cxl_dstate->cel_log + get_log->offset, + get_log->length); + + return CXL_MBOX_SUCCESS; +} + #define IMMEDIATE_CONFIG_CHANGE (1 << 1) #define IMMEDIATE_POLICY_CHANGE (1 << 3) #define IMMEDIATE_LOG_CHANGE (1 << 4) @@ -162,6 +229,8 @@ static struct cxl_cmd cxl_cmd_set[256][256] = { cmd_events_set_interrupt_policy, 4, IMMEDIATE_CONFIG_CHANGE }, [TIMESTAMP][GET] = { "TIMESTAMP_GET", cmd_timestamp_get, 0, 0 }, [TIMESTAMP][SET] = { "TIMESTAMP_SET", cmd_timestamp_set, 8, IMMEDIATE_POLICY_CHANGE }, + [LOGS][GET_SUPPORTED] = { "LOGS_GET_SUPPORTED", cmd_logs_get_supported, 0, 0 }, + [LOGS][GET_LOG] = { "LOGS_GET_LOG", cmd_logs_get_log, 0x18, 0 }, }; void cxl_process_mailbox(CXLDeviceState *cxl_dstate) |