Re: [PATCH v13 04/19] x86: Secure Launch main header file

ALOK TIWARI
2025-04-12T18:36:04Z

On 11-04-2025 02:11, Ross Philipson wrote:
> Introduce the main Secure Launch header file used in the early SL stub
> and the early setup code.
>
> This header file contains the following categories:
> - Secure Launch implementation specific structures and definitions.
> - Intel TXT architecture specific DRTM structures, definitions and functions
> used by Secure Launch.
> - DRTM TPM event logging definitions and helper functions.
>
> Signed-off-by: Ross Philipson <ross.philipson@oracle.com>
> ---

> +#define TXT_HEAP_EXTDATA_TYPE_TPM_EVENT_LOG_PTR 5
> +
> +struct txt_heap_event_log_element {
> + u64 event_log_phys_addr;
> +} __packed;
> +

can be consistence with PTR

> +#define TXT_HEAP_EXTDATA_TYPE_EVENT_LOG_POINTER2_1 8
> +
> +struct txt_heap_event_log_pointer2_1_element {
> + u64 phys_addr;
> + u32 allocated_event_container_size;
> + u32 first_record_offset;
> + u32 next_record_offset;
> +} __packed;

> +/*
> + * Find the TPM v2 event log element in the TXT heap. This element contains
> + * the information about the size and location of the DRTM event log. Note
> + * this is a TXT specific structure.
> + *
> + * See:
> + * Intel Trusted Execution Technology - Measured Launch Environment Developer's Guide - Appendix C.
> + */
> +static inline struct txt_heap_event_log_pointer2_1_element*
> +tpm2_find_log2_1_element(struct txt_os_sinit_data *os_sinit_data)
> +{
> + struct txt_heap_ext_data_element *ext_elem;
> +
> + /* The extended element array as at the end of this table */
> + ext_elem = (struct txt_heap_ext_data_element *)
> + ((u8 *)os_sinit_data + sizeof(struct txt_os_sinit_data));
> +
> + while (ext_elem->type != TXT_HEAP_EXTDATA_TYPE_END) {
> + if (ext_elem->type ==
> + TXT_HEAP_EXTDATA_TYPE_EVENT_LOG_POINTER2_1) {
> + return (struct txt_heap_event_log_pointer2_1_element *)
> + ((u8 *)ext_elem +
> + sizeof(struct txt_heap_ext_data_element));

indentation can be better here

> + }
> + ext_elem =
> + (struct txt_heap_ext_data_element *)
> + ((u8 *)ext_elem + ext_elem->size);
> + }
> +
> + return NULL;
> +}
> +
'
'
> +
> +/*
> + * External functions avalailable in mainline kernel.

typo avalailable -> available

> + */
> +void slaunch_setup_txt(void);
> +void slaunch_fixup_jump_vector(void);
> +u32 slaunch_get_flags(void);
> +struct sl_ap_wake_info *slaunch_get_ap_wake_info(void);
> +struct acpi_table_header *slaunch_get_dmar_table(struct acpi_table_header *dmar);
> +void __noreturn slaunch_txt_reset(void __iomem *txt,
> + const char *msg, u64 error);
> +void slaunch_finalize(int do_sexit);
> +
> +static inline bool slaunch_is_txt_launch(void)
> +{
> + u32 mask = SL_FLAG_ACTIVE | SL_FLAG_ARCH_TXT;

extra ' ' after =

> +
> + return (slaunch_get_flags() & mask) == mask;
> +}

Thanks,
Alok