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https://github.com/AsahiLinux/u-boot
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42a426e027
According to the UEFI spec ACPI tables should be placed in EfiACPIReclaimMemory. Let's do the same with the device tree. Suggested-by: Ard Biesheuvel <ardb@kernel.org> Cc: Grant Likely <grant.likely@arm.com> Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
192 lines
5.1 KiB
C
192 lines
5.1 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* efi_selftest_memory
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*
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* Copyright (c) 2018 Heinrich Schuchardt <xypron.glpk@gmx.de>
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*
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* This unit test checks the following boottime services:
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* AllocatePages, FreePages, GetMemoryMap
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*
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* The memory type used for the device tree is checked.
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*/
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#include <efi_selftest.h>
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#define EFI_ST_NUM_PAGES 8
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static const efi_guid_t fdt_guid = EFI_FDT_GUID;
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static struct efi_boot_services *boottime;
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static u64 fdt_addr;
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/**
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* setup() - setup unit test
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*
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* @handle: handle of the loaded image
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* @systable: system table
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* Return: EFI_ST_SUCCESS for success
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*/
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static int setup(const efi_handle_t handle,
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const struct efi_system_table *systable)
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{
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size_t i;
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boottime = systable->boottime;
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for (i = 0; i < systable->nr_tables; ++i) {
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if (!memcmp(&systable->tables[i].guid, &fdt_guid,
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sizeof(efi_guid_t))) {
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if (fdt_addr) {
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efi_st_error("Duplicate device tree\n");
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return EFI_ST_FAILURE;
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}
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fdt_addr = (uintptr_t)systable->tables[i].table;
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}
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}
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return EFI_ST_SUCCESS;
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}
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/**
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* find_in_memory_map() - check matching memory map entry exists
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*
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* @memory_map: memory map
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* @desc_size: number of memory map entries
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* @addr: physical address to find in the map
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* @type: expected memory type
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* Return: EFI_ST_SUCCESS for success
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*/
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static int find_in_memory_map(efi_uintn_t map_size,
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struct efi_mem_desc *memory_map,
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efi_uintn_t desc_size,
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u64 addr, int memory_type)
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{
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efi_uintn_t i;
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bool found = false;
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for (i = 0; map_size; ++i, map_size -= desc_size) {
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struct efi_mem_desc *entry = &memory_map[i];
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if (entry->physical_start != entry->virtual_start) {
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efi_st_error("Physical and virtual addresses do not match\n");
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return EFI_ST_FAILURE;
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}
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if (addr >= entry->physical_start &&
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addr < entry->physical_start +
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(entry->num_pages << EFI_PAGE_SHIFT)) {
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if (found) {
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efi_st_error("Duplicate memory map entry\n");
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return EFI_ST_FAILURE;
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}
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found = true;
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if (memory_type != entry->type) {
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efi_st_error
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("Wrong memory type %d, expected %d\n",
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entry->type, memory_type);
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return EFI_ST_FAILURE;
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}
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}
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}
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if (!found) {
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efi_st_error("Missing memory map entry\n");
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return EFI_ST_FAILURE;
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}
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return EFI_ST_SUCCESS;
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}
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/*
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* execute() - execute unit test
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*
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* Return: EFI_ST_SUCCESS for success
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*/
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static int execute(void)
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{
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u64 p1;
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u64 p2;
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efi_uintn_t map_size = 0;
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efi_uintn_t map_key;
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efi_uintn_t desc_size;
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u32 desc_version;
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struct efi_mem_desc *memory_map;
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efi_status_t ret;
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/* Allocate two page ranges with different memory type */
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ret = boottime->allocate_pages(EFI_ALLOCATE_ANY_PAGES,
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EFI_RUNTIME_SERVICES_CODE,
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EFI_ST_NUM_PAGES, &p1);
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if (ret != EFI_SUCCESS) {
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efi_st_error("AllocatePages did not return EFI_SUCCESS\n");
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return EFI_ST_FAILURE;
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}
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ret = boottime->allocate_pages(EFI_ALLOCATE_ANY_PAGES,
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EFI_RUNTIME_SERVICES_DATA,
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EFI_ST_NUM_PAGES, &p2);
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if (ret != EFI_SUCCESS) {
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efi_st_error("AllocatePages did not return EFI_SUCCESS\n");
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return EFI_ST_FAILURE;
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}
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/* Load memory map */
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ret = boottime->get_memory_map(&map_size, NULL, &map_key, &desc_size,
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&desc_version);
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if (ret != EFI_BUFFER_TOO_SMALL) {
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efi_st_error
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("GetMemoryMap did not return EFI_BUFFER_TOO_SMALL\n");
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return EFI_ST_FAILURE;
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}
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/* Allocate extra space for newly allocated memory */
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map_size += sizeof(struct efi_mem_desc);
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ret = boottime->allocate_pool(EFI_BOOT_SERVICES_DATA, map_size,
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(void **)&memory_map);
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if (ret != EFI_SUCCESS) {
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efi_st_error("AllocatePool did not return EFI_SUCCESS\n");
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return EFI_ST_FAILURE;
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}
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ret = boottime->get_memory_map(&map_size, memory_map, &map_key,
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&desc_size, &desc_version);
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if (ret != EFI_SUCCESS) {
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efi_st_error("GetMemoryMap did not return EFI_SUCCESS\n");
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return EFI_ST_FAILURE;
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}
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/* Check memory map entries */
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if (find_in_memory_map(map_size, memory_map, desc_size, p1,
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EFI_RUNTIME_SERVICES_CODE) != EFI_ST_SUCCESS)
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return EFI_ST_FAILURE;
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if (find_in_memory_map(map_size, memory_map, desc_size, p2,
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EFI_RUNTIME_SERVICES_DATA) != EFI_ST_SUCCESS)
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return EFI_ST_FAILURE;
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/* Free memory */
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ret = boottime->free_pages(p1, EFI_ST_NUM_PAGES);
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if (ret != EFI_SUCCESS) {
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efi_st_error("FreePages did not return EFI_SUCCESS\n");
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return EFI_ST_FAILURE;
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}
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ret = boottime->free_pages(p2, EFI_ST_NUM_PAGES);
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if (ret != EFI_SUCCESS) {
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efi_st_error("FreePages did not return EFI_SUCCESS\n");
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return EFI_ST_FAILURE;
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}
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ret = boottime->free_pool(memory_map);
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if (ret != EFI_SUCCESS) {
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efi_st_error("FreePool did not return EFI_SUCCESS\n");
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return EFI_ST_FAILURE;
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}
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/* Check memory reservation for the device tree */
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if (fdt_addr &&
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find_in_memory_map(map_size, memory_map, desc_size, fdt_addr,
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EFI_ACPI_RECLAIM_MEMORY) != EFI_ST_SUCCESS) {
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efi_st_error
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("Device tree not marked as ACPI reclaim memory\n");
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return EFI_ST_FAILURE;
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}
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return EFI_ST_SUCCESS;
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}
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EFI_UNIT_TEST(memory) = {
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.name = "memory",
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.phase = EFI_EXECUTE_BEFORE_BOOTTIME_EXIT,
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.setup = setup,
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.execute = execute,
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};
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