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torvalds
GitHub Repository: torvalds/linux
 Path: blob/master/arch/x86/virt/vmx/tdx/tdx_global_metadata.c
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// SPDX-License-Identifier: GPL-2.0

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/*

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 * Automatically generated functions to read TDX global metadata.

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 *

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 * This file doesn't compile on its own as it lacks of inclusion

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 * of SEAMCALL wrapper primitive which reads global metadata.

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 * Include this file to other C file instead.

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 */

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static int get_tdx_sys_info_features(struct tdx_sys_info_features *sysinfo_features)

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{

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	int ret = 0;

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	u64 val;

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	if (!ret && !(ret = read_sys_metadata_field(0x0A00000300000008, &val)))

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		sysinfo_features->tdx_features0 = val;

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	return ret;

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}

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static int get_tdx_sys_info_tdmr(struct tdx_sys_info_tdmr *sysinfo_tdmr)

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{

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	int ret = 0;

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	u64 val;

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	if (!ret && !(ret = read_sys_metadata_field(0x9100000100000008, &val)))

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		sysinfo_tdmr->max_tdmrs = val;

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	if (!ret && !(ret = read_sys_metadata_field(0x9100000100000009, &val)))

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		sysinfo_tdmr->max_reserved_per_tdmr = val;

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	if (!ret && !(ret = read_sys_metadata_field(0x9100000100000010, &val)))

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		sysinfo_tdmr->pamt_4k_entry_size = val;

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	if (!ret && !(ret = read_sys_metadata_field(0x9100000100000011, &val)))

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		sysinfo_tdmr->pamt_2m_entry_size = val;

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	if (!ret && !(ret = read_sys_metadata_field(0x9100000100000012, &val)))

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		sysinfo_tdmr->pamt_1g_entry_size = val;

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	return ret;

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}

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static int get_tdx_sys_info_td_ctrl(struct tdx_sys_info_td_ctrl *sysinfo_td_ctrl)

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{

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	int ret = 0;

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	u64 val;

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	if (!ret && !(ret = read_sys_metadata_field(0x9800000100000000, &val)))

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		sysinfo_td_ctrl->tdr_base_size = val;

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	if (!ret && !(ret = read_sys_metadata_field(0x9800000100000100, &val)))

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		sysinfo_td_ctrl->tdcs_base_size = val;

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	if (!ret && !(ret = read_sys_metadata_field(0x9800000100000200, &val)))

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		sysinfo_td_ctrl->tdvps_base_size = val;

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	return ret;

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}

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static int get_tdx_sys_info_td_conf(struct tdx_sys_info_td_conf *sysinfo_td_conf)

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{

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	int ret = 0;

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	u64 val;

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	int i, j;

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	if (!ret && !(ret = read_sys_metadata_field(0x1900000300000000, &val)))

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		sysinfo_td_conf->attributes_fixed0 = val;

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	if (!ret && !(ret = read_sys_metadata_field(0x1900000300000001, &val)))

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		sysinfo_td_conf->attributes_fixed1 = val;

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	if (!ret && !(ret = read_sys_metadata_field(0x1900000300000002, &val)))

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		sysinfo_td_conf->xfam_fixed0 = val;

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	if (!ret && !(ret = read_sys_metadata_field(0x1900000300000003, &val)))

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		sysinfo_td_conf->xfam_fixed1 = val;

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	if (!ret && !(ret = read_sys_metadata_field(0x9900000100000004, &val)))

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		sysinfo_td_conf->num_cpuid_config = val;

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	if (!ret && !(ret = read_sys_metadata_field(0x9900000100000008, &val)))

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		sysinfo_td_conf->max_vcpus_per_td = val;

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	if (sysinfo_td_conf->num_cpuid_config > ARRAY_SIZE(sysinfo_td_conf->cpuid_config_leaves))

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		return -EINVAL;

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	for (i = 0; i < sysinfo_td_conf->num_cpuid_config; i++)

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		if (!ret && !(ret = read_sys_metadata_field(0x9900000300000400 + i, &val)))

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			sysinfo_td_conf->cpuid_config_leaves[i] = val;

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	if (sysinfo_td_conf->num_cpuid_config > ARRAY_SIZE(sysinfo_td_conf->cpuid_config_values))

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		return -EINVAL;

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	for (i = 0; i < sysinfo_td_conf->num_cpuid_config; i++)

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		for (j = 0; j < 2; j++)

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			if (!ret && !(ret = read_sys_metadata_field(0x9900000300000500 + i * 2 + j, &val)))

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				sysinfo_td_conf->cpuid_config_values[i][j] = val;

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	return ret;

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}

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static int get_tdx_sys_info(struct tdx_sys_info *sysinfo)

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{

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	int ret = 0;

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	ret = ret ?: get_tdx_sys_info_features(&sysinfo->features);

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	ret = ret ?: get_tdx_sys_info_tdmr(&sysinfo->tdmr);

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	ret = ret ?: get_tdx_sys_info_td_ctrl(&sysinfo->td_ctrl);

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	ret = ret ?: get_tdx_sys_info_td_conf(&sysinfo->td_conf);

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	return ret;

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}

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