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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _X86_VIRT_TDX_H
#define _X86_VIRT_TDX_H
#include <linux/bits.h>
/*
* This file contains both macros and data structures defined by the TDX
* architecture and Linux defined software data structures and functions.
* The two should not be mixed together for better readability. The
* architectural definitions come first.
*/
/*
* TDX module SEAMCALL leaf functions
*/
#define TDH_PHYMEM_PAGE_RDMD 24
#define TDH_SYS_KEY_CONFIG 31
#define TDH_SYS_INIT 33
#define TDH_SYS_RD 34
#define TDH_SYS_LP_INIT 35
#define TDH_SYS_TDMR_INIT 36
#define TDH_SYS_CONFIG 45
/* TDX page types */
#define PT_NDA 0x0
#define PT_RSVD 0x1
/*
* Global scope metadata field ID.
*
* See Table "Global Scope Metadata", TDX module 1.5 ABI spec.
*/
#define MD_FIELD_ID_MAX_TDMRS 0x9100000100000008ULL
#define MD_FIELD_ID_MAX_RESERVED_PER_TDMR 0x9100000100000009ULL
#define MD_FIELD_ID_PAMT_4K_ENTRY_SIZE 0x9100000100000010ULL
#define MD_FIELD_ID_PAMT_2M_ENTRY_SIZE 0x9100000100000011ULL
#define MD_FIELD_ID_PAMT_1G_ENTRY_SIZE 0x9100000100000012ULL
/*
* Sub-field definition of metadata field ID.
*
* See Table "MD_FIELD_ID (Metadata Field Identifier / Sequence Header)
* Definition", TDX module 1.5 ABI spec.
*
* - Bit 33:32: ELEMENT_SIZE_CODE -- size of a single element of metadata
*
* 0: 8 bits
* 1: 16 bits
* 2: 32 bits
* 3: 64 bits
*/
#define MD_FIELD_ID_ELE_SIZE_CODE(_field_id) \
(((_field_id) & GENMASK_ULL(33, 32)) >> 32)
#define MD_FIELD_ID_ELE_SIZE_16BIT 1
struct tdmr_reserved_area {
u64 offset;
u64 size;
} __packed;
#define TDMR_INFO_ALIGNMENT 512
#define TDMR_INFO_PA_ARRAY_ALIGNMENT 512
struct tdmr_info {
u64 base;
u64 size;
u64 pamt_1g_base;
u64 pamt_1g_size;
u64 pamt_2m_base;
u64 pamt_2m_size;
u64 pamt_4k_base;
u64 pamt_4k_size;
/*
* The actual number of reserved areas depends on the value of
* field MD_FIELD_ID_MAX_RESERVED_PER_TDMR in the TDX module
* global metadata.
*/
DECLARE_FLEX_ARRAY(struct tdmr_reserved_area, reserved_areas);
} __packed __aligned(TDMR_INFO_ALIGNMENT);
/*
* Do not put any hardware-defined TDX structure representations below
* this comment!
*/
/* Kernel defined TDX module status during module initialization. */
enum tdx_module_status_t {
TDX_MODULE_UNINITIALIZED,
TDX_MODULE_INITIALIZED,
TDX_MODULE_ERROR
};
struct tdx_memblock {
struct list_head list;
unsigned long start_pfn;
unsigned long end_pfn;
int nid;
};
/* "TDMR info" part of "Global Scope Metadata" for constructing TDMRs */
struct tdx_tdmr_sysinfo {
u16 max_tdmrs;
u16 max_reserved_per_tdmr;
u16 pamt_entry_size[TDX_PS_NR];
};
/* Warn if kernel has less than TDMR_NR_WARN TDMRs after allocation */
#define TDMR_NR_WARN 4
struct tdmr_info_list {
void *tdmrs; /* Flexible array to hold 'tdmr_info's */
int nr_consumed_tdmrs; /* How many 'tdmr_info's are in use */
/* Metadata for finding target 'tdmr_info' and freeing @tdmrs */
int tdmr_sz; /* Size of one 'tdmr_info' */
int max_tdmrs; /* How many 'tdmr_info's are allocated */
};
#endif
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