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SubjectRe: [PATCH RFC v3 5/6] firmware/efi: Process CXL Component Events
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On 11/1/2023 2:11 PM, Ira Weiny wrote:

[snip]

> diff --git a/include/linux/cxl-event.h b/include/linux/cxl-event.h
> index 6b689e1efc78..2bdadde80f1a 100644
> --- a/include/linux/cxl-event.h
> +++ b/include/linux/cxl-event.h
> @@ -108,4 +108,53 @@ struct cxl_event_record_raw {
> union cxl_event event;
> } __packed;
>
> +enum cxl_event_type {
> + CXL_CPER_EVENT_GEN_MEDIA,
> + CXL_CPER_EVENT_DRAM,
> + CXL_CPER_EVENT_MEM_MODULE,
> +};
> +
> +#define CPER_CXL_DEVICE_ID_VALID BIT(0)
> +#define CPER_CXL_DEVICE_SN_VALID BIT(1)
> +#define CPER_CXL_COMP_EVENT_LOG_VALID BIT(2)
> +struct cper_cxl_event_rec {
> + struct {
> + u32 length;
> + u64 validation_bits;
> + struct cper_cxl_event_devid {
> + u16 vendor_id;
> + u16 device_id;
> + u8 func_num;
> + u8 device_num;
> + u8 bus_num;
> + u16 segment_num;
> + u16 slot_num; /* bits 2:0 reserved */
> + u8 reserved;
> + } device_id;
> + struct cper_cxl_event_sn {
> + u32 lower_dw;
> + u32 upper_dw;
> + } dev_serial_num;
> + } hdr;
> +
> + union cxl_event event;
> +};

Do we need pragma pack or similar for alignment here?

Thanks,
Smita

> +
> +struct cxl_cper_notifier_data {
> + enum cxl_event_type event_type;
> + struct cper_cxl_event_rec *rec;
> +};
> +
> +#ifdef CONFIG_UEFI_CPER
> +int register_cxl_cper_notifier(struct notifier_block *nb);
> +void unregister_cxl_cper_notifier(struct notifier_block *nb);
> +#else
> +static inline int register_cxl_cper_notifier(struct notifier_block *nb)
> +{
> + return 0;
> +}
> +
> +static inline void unregister_cxl_cper_notifier(struct notifier_block *nb) { }
> +#endif
> +
> #endif /* _LINUX_CXL_EVENT_H */
>

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