smm_module_loader.c File Reference

#include <acpi/acpi_gnvs.h>
#include <stddef.h>
#include <stdint.h>
#include <string.h>
#include <rmodule.h>
#include <cbmem.h>
#include <cpu/x86/smm.h>
#include <commonlib/helpers.h>
#include <console/console.h>
#include <security/intel/stm/SmmStm.h>

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Data Structures
struct	cpu_smm_info

Macros
#define	FXSAVE_SIZE   512
#define	SMM_CODE_SEGMENT_SIZE   0x10000
#define	SMM_MINIMUM_STACK_SIZE   32

Functions
static int	smm_create_map (uintptr_t smbase, unsigned int num_cpus, const struct smm_loader_params *params)
u32	smm_get_cpu_smbase (unsigned int cpu_num)
static int	smm_place_entry_code (uintptr_t smbase, unsigned int num_cpus, uintptr_t stack_top, const struct smm_loader_params *params)
int	smm_setup_stack (const uintptr_t perm_smbase, const size_t perm_smram_size, const unsigned int total_cpus, const size_t stack_size)
static int	smm_stub_place_staggered_entry_points (char *base, const struct smm_loader_params *params, const struct rmodule *smm_stub)
static int	smm_module_setup_stub (const uintptr_t smbase, const size_t smm_size, struct smm_loader_params *params, void *const fxsave_area)
int	smm_setup_relocation_handler (struct smm_loader_params *params)
static int	smm_load_module_aseg (const uintptr_t smram_base, const size_t smram_size, struct smm_loader_params *params)
int	smm_load_module (const uintptr_t smram_base, const size_t smram_size, struct smm_loader_params *params)

Variables
static uint8_t	fxsave_area_relocation [CONFIG_MAX_CPUS][FXSAVE_SIZE]
unsigned char	_binary_smmstub_start []
struct cpu_smm_info	cpus [CONFIG_MAX_CPUS] = { 0 }
static uintptr_t	stack_top
static size_t	g_stack_size

Macro Definition Documentation

FXSAVE_SIZE

#define FXSAVE_SIZE   512

Definition at line 14 of file smm_module_loader.c.

SMM_CODE_SEGMENT_SIZE

#define SMM_CODE_SEGMENT_SIZE   0x10000

Definition at line 15 of file smm_module_loader.c.

SMM_MINIMUM_STACK_SIZE

#define SMM_MINIMUM_STACK_SIZE   32

Definition at line 39 of file smm_module_loader.c.

Function Documentation

smm_create_map()

static int smm_create_map ( uintptr_t  smbase, unsigned int  num_cpus, const struct smm_loader_params *  params  )

static

Definition at line 88 of file smm_module_loader.c.

References _binary_smmstub_start, cpu_smm_info::active, ARRAY_SIZE, base, BIOS_DEBUG, BIOS_ERR, cpu_smm_info::code_end, cpu_smm_info::code_start, cpus, cpu_smm_info::entry, params, printk, rmodule_memory_size(), rmodule_parse(), cpu_smm_info::smbase, SMM_ENTRY_OFFSET, and cpu_smm_info::ss_start.

Referenced by smm_load_module(), and smm_load_module_aseg().

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smm_get_cpu_smbase()

u32 smm_get_cpu_smbase

(

unsigned int

cpu_num

)

Definition at line 159 of file smm_module_loader.c.

References cpus, and cpu_smm_info::smbase.

Referenced by smm_do_relocation().

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smm_load_module()

int smm_load_module	(	const uintptr_t	smram_base,
		const size_t	smram_size,
		struct smm_loader_params *	params
	)

Definition at line 458 of file smm_module_loader.c.

References _binary_smm_start, acpi_get_gnvs(), base, BIOS_DEBUG, BIOS_ERR, cbmem_entry_find(), cbmem_entry_size(), cbmem_entry_start(), CBMEM_ID_CONSOLE, smm_runtime::cbmemc, smm_runtime::cbmemc_size, CONFIG, cpus, DEBUG_SMI, FXSAVE_SIZE, smm_runtime::gnvs_ptr, memset(), NULL, smm_runtime::num_cpus, params, printk, rmodule_entry(), rmodule_load(), rmodule_load_alignment(), rmodule_memory_size(), rmodule_parameters(), rmodule_parse(), smm_runtime::save_state_size, smm_runtime::save_state_top, smm_runtime::smbase, SMM_CODE_SEGMENT_SIZE, smm_create_map(), SMM_DEFAULT_SIZE, smm_load_module_aseg(), smm_module_setup_stub(), smm_runtime::smm_size, cpu_smm_info::ss_start, and stack_top.

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smm_load_module_aseg()

static int smm_load_module_aseg ( const uintptr_t  smram_base, const size_t  smram_size, struct smm_loader_params *  params  )

static

Definition at line 622 of file smm_module_loader.c.

References _binary_smm_start, acpi_get_gnvs(), ALIGN_DOWN, BIOS_DEBUG, BIOS_ERR, cpu_smm_info::code_end, cpus, FXSAVE_SIZE, smm_runtime::gnvs_ptr, smm_runtime::num_cpus, params, printk, rmodule_entry(), rmodule_load(), rmodule_load_alignment(), rmodule_memory_size(), rmodule_parameters(), rmodule_parse(), smm_runtime::save_state_size, smm_runtime::save_state_top, smm_runtime::smbase, SMM_BASE, smm_create_map(), SMM_DEFAULT_SIZE, smm_module_setup_stub(), smm_runtime::smm_size, and cpu_smm_info::ss_start.

Referenced by smm_load_module().

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smm_module_setup_stub()

static int smm_module_setup_stub ( const uintptr_t  smbase, const size_t  smm_size, struct smm_loader_params *  params, void *const  fxsave_area  )

static

Definition at line 298 of file smm_module_loader.c.

References _binary_smmstub_start, smm_stub_params::apic_id_to_cpu, base, BIOS_DEBUG, BIOS_ERR, smm_stub_params::c_handler, smm_stub_params::fxsave_area, smm_stub_params::fxsave_area_size, FXSAVE_SIZE, g_stack_size, params, printk, rmodule_load(), rmodule_memory_size(), rmodule_parameters(), rmodule_parse(), SMM_ENTRY_OFFSET, smm_stub_place_staggered_entry_points(), smm_stub_size(), smm_stub_params::stack_size, stack_top, smm_stub_params::stack_top, and smm_stub_params::start32_offset.

Referenced by smm_load_module(), smm_load_module_aseg(), and smm_setup_relocation_handler().

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smm_place_entry_code()

static int smm_place_entry_code ( uintptr_t  smbase, unsigned int  num_cpus, uintptr_t  stack_top, const struct smm_loader_params *  params  )

static

Definition at line 196 of file smm_module_loader.c.

References BIOS_DEBUG, BIOS_ERR, BIOS_INFO, cpu_smm_info::code_end, cpu_smm_info::code_start, cpus, memcpy(), printk, SMM_ENTRY_OFFSET, and stack_top.

Referenced by smm_stub_place_staggered_entry_points().

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smm_setup_relocation_handler()

int smm_setup_relocation_handler

(

struct smm_loader_params *

params

)

Definition at line 406 of file smm_module_loader.c.

References BIOS_SPEW, fxsave_area_relocation, NULL, params, printk, SMM_DEFAULT_BASE, SMM_DEFAULT_SIZE, and smm_module_setup_stub().

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smm_setup_stack()

int smm_setup_stack	(	const uintptr_t	perm_smbase,
		const size_t	perm_smram_size,
		const unsigned int	total_cpus,
		const size_t	stack_size
	)

Definition at line 235 of file smm_module_loader.c.

References BIOS_ERR, g_stack_size, printk, SMM_MINIMUM_STACK_SIZE, and stack_top.

Referenced by load_smm_handlers().

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smm_stub_place_staggered_entry_points()

static int smm_stub_place_staggered_entry_points ( char *  base, const struct smm_loader_params *  params, const struct rmodule *  smm_stub  )

static

Definition at line 259 of file smm_module_loader.c.

References base, params, rmodule_entry_offset(), smm_place_entry_code(), and stack_top.

Referenced by smm_module_setup_stub().

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Variable Documentation

_binary_smmstub_start

unsigned char _binary_smmstub_start[]

extern

Referenced by smm_create_map(), smm_module_setup_stub(), and smm_stub_size().

cpus

struct cpu_smm_info cpus[CONFIG_MAX_CPUS] = { 0 }

Definition at line 36 of file smm_module_loader.c.

Referenced by smm_create_map(), smm_get_cpu_smbase(), smm_load_module(), smm_load_module_aseg(), and smm_place_entry_code().

fxsave_area_relocation

uint8_t fxsave_area_relocation[CONFIG_MAX_CPUS][FXSAVE_SIZE]

static

Definition at line 19 of file smm_module_loader.c.

Referenced by smm_setup_relocation_handler().

g_stack_size

size_t g_stack_size

static

Definition at line 233 of file smm_module_loader.c.

Referenced by smm_module_setup_stub(), and smm_setup_stack().

stack_top

uintptr_t stack_top

static

Definition at line 232 of file smm_module_loader.c.

Referenced by finalize_load(), smm_load_module(), smm_module_setup_stub(), smm_place_entry_code(), smm_setup_stack(), smm_stub_place_staggered_entry_points(), start_cpu(), and threads_initialize().