arch/x86/virt/vmx/tdx/tdx_global_metadata.c

Source file repositories/reference/linux-study-clean/arch/x86/virt/vmx/tdx/tdx_global_metadata.c

File Facts

System
Linux kernel
Corpus path
arch/x86/virt/vmx/tdx/tdx_global_metadata.c
Extension
.c
Size
4411 bytes
Lines
134
Domain
Architecture Layer
Bucket
arch/x86
Inferred role
Architecture Layer: implementation source
Status
source implementation candidate

Why This File Exists

CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.

Dependency Surface

Detected Declarations

Annotated Snippet

// SPDX-License-Identifier: GPL-2.0
/*
 * Automatically generated functions to read TDX global metadata.
 *
 * This file doesn't compile on its own as it lacks of inclusion
 * of SEAMCALL wrapper primitive which reads global metadata.
 * Include this file to other C file instead.
 */

static int get_tdx_sys_info_version(struct tdx_sys_info_version *sysinfo_version)
{
	int ret = 0;
	u64 val;

	if (!ret && !(ret = read_sys_metadata_field(0x0800000100000003, &val)))
		sysinfo_version->minor_version = val;
	if (!ret && !(ret = read_sys_metadata_field(0x0800000100000004, &val)))
		sysinfo_version->major_version = val;
	if (!ret && !(ret = read_sys_metadata_field(0x0800000100000005, &val)))
		sysinfo_version->update_version = val;

	return ret;
}

static __init int get_tdx_sys_info_features(struct tdx_sys_info_features *sysinfo_features)
{
	int ret = 0;
	u64 val;

	if (!ret && !(ret = read_sys_metadata_field(0x0A00000300000008, &val)))
		sysinfo_features->tdx_features0 = val;

	return ret;
}

static __init int get_tdx_sys_info_tdmr(struct tdx_sys_info_tdmr *sysinfo_tdmr)
{
	int ret = 0;
	u64 val;

	if (!ret && !(ret = read_sys_metadata_field(0x9100000100000008, &val)))
		sysinfo_tdmr->max_tdmrs = val;
	if (!ret && !(ret = read_sys_metadata_field(0x9100000100000009, &val)))
		sysinfo_tdmr->max_reserved_per_tdmr = val;
	if (!ret && !(ret = read_sys_metadata_field(0x9100000100000010, &val)))
		sysinfo_tdmr->pamt_4k_entry_size = val;
	if (!ret && !(ret = read_sys_metadata_field(0x9100000100000011, &val)))
		sysinfo_tdmr->pamt_2m_entry_size = val;
	if (!ret && !(ret = read_sys_metadata_field(0x9100000100000012, &val)))
		sysinfo_tdmr->pamt_1g_entry_size = val;

	return ret;
}

static __init int get_tdx_sys_info_td_ctrl(struct tdx_sys_info_td_ctrl *sysinfo_td_ctrl)
{
	int ret = 0;
	u64 val;

	if (!ret && !(ret = read_sys_metadata_field(0x9800000100000000, &val)))
		sysinfo_td_ctrl->tdr_base_size = val;
	if (!ret && !(ret = read_sys_metadata_field(0x9800000100000100, &val)))
		sysinfo_td_ctrl->tdcs_base_size = val;
	if (!ret && !(ret = read_sys_metadata_field(0x9800000100000200, &val)))
		sysinfo_td_ctrl->tdvps_base_size = val;

	return ret;
}

static __init int get_tdx_sys_info_td_conf(struct tdx_sys_info_td_conf *sysinfo_td_conf)
{
	int ret = 0;
	u64 val;
	int i, j;

	if (!ret && !(ret = read_sys_metadata_field(0x1900000300000000, &val)))
		sysinfo_td_conf->attributes_fixed0 = val;
	if (!ret && !(ret = read_sys_metadata_field(0x1900000300000001, &val)))
		sysinfo_td_conf->attributes_fixed1 = val;
	if (!ret && !(ret = read_sys_metadata_field(0x1900000300000002, &val)))
		sysinfo_td_conf->xfam_fixed0 = val;
	if (!ret && !(ret = read_sys_metadata_field(0x1900000300000003, &val)))
		sysinfo_td_conf->xfam_fixed1 = val;
	if (!ret && !(ret = read_sys_metadata_field(0x9900000100000004, &val)))
		sysinfo_td_conf->num_cpuid_config = val;
	if (!ret && !(ret = read_sys_metadata_field(0x9900000100000008, &val)))
		sysinfo_td_conf->max_vcpus_per_td = val;
	if (sysinfo_td_conf->num_cpuid_config > ARRAY_SIZE(sysinfo_td_conf->cpuid_config_leaves))
		return -EINVAL;
	for (i = 0; i < sysinfo_td_conf->num_cpuid_config; i++)

Annotation

Implementation Notes