forked from Minki/linux
Merge branch 'aarch64/efi' into aarch64/for-next/core
Merge in EFI memblock changes from Ard, which form the preparatory work for UEFI support on 32-bit ARM.
This commit is contained in:
commit
129b985cc3
@ -2,7 +2,9 @@
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#define _ASM_EFI_H
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#include <asm/io.h>
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#include <asm/mmu_context.h>
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#include <asm/neon.h>
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#include <asm/tlbflush.h>
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#ifdef CONFIG_EFI
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extern void efi_init(void);
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@ -10,6 +12,8 @@ extern void efi_init(void);
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#define efi_init()
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#endif
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int efi_create_mapping(struct mm_struct *mm, efi_memory_desc_t *md);
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#define efi_call_virt(f, ...) \
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({ \
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efi_##f##_t *__f; \
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@ -63,6 +67,11 @@ extern void efi_init(void);
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* Services are enabled and the EFI_RUNTIME_SERVICES bit set.
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*/
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static inline void efi_set_pgd(struct mm_struct *mm)
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{
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switch_mm(NULL, mm, NULL);
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}
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void efi_virtmap_load(void);
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void efi_virtmap_unload(void);
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@ -11,317 +11,34 @@
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*
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*/
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#include <linux/atomic.h>
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#include <linux/dmi.h>
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#include <linux/efi.h>
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#include <linux/export.h>
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#include <linux/memblock.h>
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#include <linux/mm_types.h>
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#include <linux/bootmem.h>
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#include <linux/of.h>
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#include <linux/of_fdt.h>
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#include <linux/preempt.h>
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#include <linux/rbtree.h>
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#include <linux/rwsem.h>
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#include <linux/sched.h>
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#include <linux/slab.h>
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#include <linux/spinlock.h>
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#include <linux/init.h>
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#include <asm/cacheflush.h>
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#include <asm/efi.h>
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#include <asm/tlbflush.h>
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#include <asm/mmu_context.h>
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#include <asm/mmu.h>
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#include <asm/pgtable.h>
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struct efi_memory_map memmap;
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static u64 efi_system_table;
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static pgd_t efi_pgd[PTRS_PER_PGD] __page_aligned_bss;
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static struct mm_struct efi_mm = {
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.mm_rb = RB_ROOT,
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.pgd = efi_pgd,
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.mm_users = ATOMIC_INIT(2),
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.mm_count = ATOMIC_INIT(1),
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.mmap_sem = __RWSEM_INITIALIZER(efi_mm.mmap_sem),
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.page_table_lock = __SPIN_LOCK_UNLOCKED(efi_mm.page_table_lock),
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.mmlist = LIST_HEAD_INIT(efi_mm.mmlist),
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};
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static int __init is_normal_ram(efi_memory_desc_t *md)
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int __init efi_create_mapping(struct mm_struct *mm, efi_memory_desc_t *md)
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{
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if (md->attribute & EFI_MEMORY_WB)
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return 1;
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return 0;
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}
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/*
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* Translate a EFI virtual address into a physical address: this is necessary,
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* as some data members of the EFI system table are virtually remapped after
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* SetVirtualAddressMap() has been called.
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*/
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static phys_addr_t efi_to_phys(unsigned long addr)
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{
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efi_memory_desc_t *md;
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for_each_efi_memory_desc(&memmap, md) {
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if (!(md->attribute & EFI_MEMORY_RUNTIME))
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continue;
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if (md->virt_addr == 0)
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/* no virtual mapping has been installed by the stub */
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break;
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if (md->virt_addr <= addr &&
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(addr - md->virt_addr) < (md->num_pages << EFI_PAGE_SHIFT))
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return md->phys_addr + addr - md->virt_addr;
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}
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return addr;
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}
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static int __init uefi_init(void)
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{
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efi_char16_t *c16;
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void *config_tables;
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u64 table_size;
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char vendor[100] = "unknown";
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int i, retval;
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efi.systab = early_memremap(efi_system_table,
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sizeof(efi_system_table_t));
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if (efi.systab == NULL) {
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pr_warn("Unable to map EFI system table.\n");
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return -ENOMEM;
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}
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set_bit(EFI_BOOT, &efi.flags);
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set_bit(EFI_64BIT, &efi.flags);
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pteval_t prot_val;
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/*
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* Verify the EFI Table
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* Only regions of type EFI_RUNTIME_SERVICES_CODE need to be
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* executable, everything else can be mapped with the XN bits
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* set.
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*/
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if (efi.systab->hdr.signature != EFI_SYSTEM_TABLE_SIGNATURE) {
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pr_err("System table signature incorrect\n");
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retval = -EINVAL;
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goto out;
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}
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if ((efi.systab->hdr.revision >> 16) < 2)
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pr_warn("Warning: EFI system table version %d.%02d, expected 2.00 or greater\n",
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efi.systab->hdr.revision >> 16,
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efi.systab->hdr.revision & 0xffff);
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/* Show what we know for posterity */
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c16 = early_memremap(efi_to_phys(efi.systab->fw_vendor),
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sizeof(vendor) * sizeof(efi_char16_t));
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if (c16) {
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for (i = 0; i < (int) sizeof(vendor) - 1 && *c16; ++i)
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vendor[i] = c16[i];
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vendor[i] = '\0';
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early_memunmap(c16, sizeof(vendor) * sizeof(efi_char16_t));
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}
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pr_info("EFI v%u.%.02u by %s\n",
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efi.systab->hdr.revision >> 16,
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efi.systab->hdr.revision & 0xffff, vendor);
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table_size = sizeof(efi_config_table_64_t) * efi.systab->nr_tables;
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config_tables = early_memremap(efi_to_phys(efi.systab->tables),
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table_size);
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if (config_tables == NULL) {
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pr_warn("Unable to map EFI config table array.\n");
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retval = -ENOMEM;
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goto out;
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}
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retval = efi_config_parse_tables(config_tables, efi.systab->nr_tables,
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sizeof(efi_config_table_64_t), NULL);
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early_memunmap(config_tables, table_size);
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out:
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early_memunmap(efi.systab, sizeof(efi_system_table_t));
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return retval;
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}
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/*
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* Return true for RAM regions we want to permanently reserve.
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*/
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static __init int is_reserve_region(efi_memory_desc_t *md)
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{
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switch (md->type) {
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case EFI_LOADER_CODE:
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case EFI_LOADER_DATA:
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case EFI_BOOT_SERVICES_CODE:
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case EFI_BOOT_SERVICES_DATA:
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case EFI_CONVENTIONAL_MEMORY:
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case EFI_PERSISTENT_MEMORY:
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return 0;
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default:
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break;
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}
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return is_normal_ram(md);
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}
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static __init void reserve_regions(void)
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{
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efi_memory_desc_t *md;
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u64 paddr, npages, size;
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if (efi_enabled(EFI_DBG))
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pr_info("Processing EFI memory map:\n");
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for_each_efi_memory_desc(&memmap, md) {
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paddr = md->phys_addr;
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npages = md->num_pages;
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if (efi_enabled(EFI_DBG)) {
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char buf[64];
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pr_info(" 0x%012llx-0x%012llx %s",
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paddr, paddr + (npages << EFI_PAGE_SHIFT) - 1,
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efi_md_typeattr_format(buf, sizeof(buf), md));
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}
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memrange_efi_to_native(&paddr, &npages);
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size = npages << PAGE_SHIFT;
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if (is_normal_ram(md))
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early_init_dt_add_memory_arch(paddr, size);
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if (is_reserve_region(md)) {
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memblock_reserve(paddr, size);
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if (efi_enabled(EFI_DBG))
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pr_cont("*");
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}
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if (efi_enabled(EFI_DBG))
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pr_cont("\n");
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}
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set_bit(EFI_MEMMAP, &efi.flags);
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}
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void __init efi_init(void)
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{
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struct efi_fdt_params params;
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/* Grab UEFI information placed in FDT by stub */
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if (!efi_get_fdt_params(¶ms))
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return;
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efi_system_table = params.system_table;
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memblock_reserve(params.mmap & PAGE_MASK,
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PAGE_ALIGN(params.mmap_size + (params.mmap & ~PAGE_MASK)));
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memmap.phys_map = params.mmap;
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memmap.map = early_memremap(params.mmap, params.mmap_size);
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if (memmap.map == NULL) {
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/*
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* If we are booting via UEFI, the UEFI memory map is the only
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* description of memory we have, so there is little point in
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* proceeding if we cannot access it.
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*/
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panic("Unable to map EFI memory map.\n");
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}
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memmap.map_end = memmap.map + params.mmap_size;
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memmap.desc_size = params.desc_size;
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memmap.desc_version = params.desc_ver;
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if (uefi_init() < 0)
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return;
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reserve_regions();
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early_memunmap(memmap.map, params.mmap_size);
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}
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static bool __init efi_virtmap_init(void)
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{
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efi_memory_desc_t *md;
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init_new_context(NULL, &efi_mm);
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for_each_efi_memory_desc(&memmap, md) {
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pgprot_t prot;
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if (!(md->attribute & EFI_MEMORY_RUNTIME))
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continue;
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if (md->virt_addr == 0)
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return false;
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pr_info(" EFI remap 0x%016llx => %p\n",
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md->phys_addr, (void *)md->virt_addr);
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/*
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* Only regions of type EFI_RUNTIME_SERVICES_CODE need to be
|
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* executable, everything else can be mapped with the XN bits
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* set.
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*/
|
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if (!is_normal_ram(md))
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prot = __pgprot(PROT_DEVICE_nGnRE);
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else if (md->type == EFI_RUNTIME_SERVICES_CODE ||
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!PAGE_ALIGNED(md->phys_addr))
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prot = PAGE_KERNEL_EXEC;
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else
|
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prot = PAGE_KERNEL;
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|
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create_pgd_mapping(&efi_mm, md->phys_addr, md->virt_addr,
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md->num_pages << EFI_PAGE_SHIFT,
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||||
__pgprot(pgprot_val(prot) | PTE_NG));
|
||||
}
|
||||
return true;
|
||||
}
|
||||
|
||||
/*
|
||||
* Enable the UEFI Runtime Services if all prerequisites are in place, i.e.,
|
||||
* non-early mapping of the UEFI system table and virtual mappings for all
|
||||
* EFI_MEMORY_RUNTIME regions.
|
||||
*/
|
||||
static int __init arm64_enable_runtime_services(void)
|
||||
{
|
||||
u64 mapsize;
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||||
|
||||
if (!efi_enabled(EFI_BOOT)) {
|
||||
pr_info("EFI services will not be available.\n");
|
||||
return 0;
|
||||
}
|
||||
|
||||
if (efi_runtime_disabled()) {
|
||||
pr_info("EFI runtime services will be disabled.\n");
|
||||
return 0;
|
||||
}
|
||||
|
||||
pr_info("Remapping and enabling EFI services.\n");
|
||||
|
||||
mapsize = memmap.map_end - memmap.map;
|
||||
memmap.map = (__force void *)ioremap_cache(memmap.phys_map,
|
||||
mapsize);
|
||||
if (!memmap.map) {
|
||||
pr_err("Failed to remap EFI memory map\n");
|
||||
return -ENOMEM;
|
||||
}
|
||||
memmap.map_end = memmap.map + mapsize;
|
||||
efi.memmap = &memmap;
|
||||
|
||||
efi.systab = (__force void *)ioremap_cache(efi_system_table,
|
||||
sizeof(efi_system_table_t));
|
||||
if (!efi.systab) {
|
||||
pr_err("Failed to remap EFI System Table\n");
|
||||
return -ENOMEM;
|
||||
}
|
||||
set_bit(EFI_SYSTEM_TABLES, &efi.flags);
|
||||
|
||||
if (!efi_virtmap_init()) {
|
||||
pr_err("No UEFI virtual mapping was installed -- runtime services will not be available\n");
|
||||
return -ENOMEM;
|
||||
}
|
||||
|
||||
/* Set up runtime services function pointers */
|
||||
efi_native_runtime_setup();
|
||||
set_bit(EFI_RUNTIME_SERVICES, &efi.flags);
|
||||
|
||||
efi.runtime_version = efi.systab->hdr.revision;
|
||||
if ((md->attribute & EFI_MEMORY_WB) == 0)
|
||||
prot_val = PROT_DEVICE_nGnRE;
|
||||
else if (md->type == EFI_RUNTIME_SERVICES_CODE ||
|
||||
!PAGE_ALIGNED(md->phys_addr))
|
||||
prot_val = pgprot_val(PAGE_KERNEL_EXEC);
|
||||
else
|
||||
prot_val = pgprot_val(PAGE_KERNEL);
|
||||
|
||||
create_pgd_mapping(mm, md->phys_addr, md->virt_addr,
|
||||
md->num_pages << EFI_PAGE_SHIFT,
|
||||
__pgprot(prot_val | PTE_NG));
|
||||
return 0;
|
||||
}
|
||||
early_initcall(arm64_enable_runtime_services);
|
||||
|
||||
static int __init arm64_dmi_init(void)
|
||||
{
|
||||
@ -337,23 +54,6 @@ static int __init arm64_dmi_init(void)
|
||||
}
|
||||
core_initcall(arm64_dmi_init);
|
||||
|
||||
static void efi_set_pgd(struct mm_struct *mm)
|
||||
{
|
||||
switch_mm(NULL, mm, NULL);
|
||||
}
|
||||
|
||||
void efi_virtmap_load(void)
|
||||
{
|
||||
preempt_disable();
|
||||
efi_set_pgd(&efi_mm);
|
||||
}
|
||||
|
||||
void efi_virtmap_unload(void)
|
||||
{
|
||||
efi_set_pgd(current->active_mm);
|
||||
preempt_enable();
|
||||
}
|
||||
|
||||
/*
|
||||
* UpdateCapsule() depends on the system being shutdown via
|
||||
* ResetSystem().
|
||||
|
@ -120,7 +120,7 @@ static void __init zone_sizes_init(unsigned long min, unsigned long max)
|
||||
#ifdef CONFIG_HAVE_ARCH_PFN_VALID
|
||||
int pfn_valid(unsigned long pfn)
|
||||
{
|
||||
return memblock_is_memory(pfn << PAGE_SHIFT);
|
||||
return memblock_is_map_memory(pfn << PAGE_SHIFT);
|
||||
}
|
||||
EXPORT_SYMBOL(pfn_valid);
|
||||
#endif
|
||||
|
@ -380,6 +380,8 @@ static void __init map_mem(void)
|
||||
|
||||
if (start >= end)
|
||||
break;
|
||||
if (memblock_is_nomap(reg))
|
||||
continue;
|
||||
|
||||
if (ARM64_SWAPPER_USES_SECTION_MAPS) {
|
||||
/*
|
||||
|
@ -18,3 +18,6 @@ obj-$(CONFIG_EFI_RUNTIME_MAP) += runtime-map.o
|
||||
obj-$(CONFIG_EFI_RUNTIME_WRAPPERS) += runtime-wrappers.o
|
||||
obj-$(CONFIG_EFI_STUB) += libstub/
|
||||
obj-$(CONFIG_EFI_FAKE_MEMMAP) += fake_mem.o
|
||||
|
||||
arm-obj-$(CONFIG_EFI) := arm-init.o arm-runtime.o
|
||||
obj-$(CONFIG_ARM64) += $(arm-obj-y)
|
||||
|
209
drivers/firmware/efi/arm-init.c
Normal file
209
drivers/firmware/efi/arm-init.c
Normal file
@ -0,0 +1,209 @@
|
||||
/*
|
||||
* Extensible Firmware Interface
|
||||
*
|
||||
* Based on Extensible Firmware Interface Specification version 2.4
|
||||
*
|
||||
* Copyright (C) 2013 - 2015 Linaro Ltd.
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License version 2 as
|
||||
* published by the Free Software Foundation.
|
||||
*
|
||||
*/
|
||||
|
||||
#include <linux/efi.h>
|
||||
#include <linux/init.h>
|
||||
#include <linux/memblock.h>
|
||||
#include <linux/mm_types.h>
|
||||
#include <linux/of.h>
|
||||
#include <linux/of_fdt.h>
|
||||
|
||||
#include <asm/efi.h>
|
||||
|
||||
struct efi_memory_map memmap;
|
||||
|
||||
u64 efi_system_table;
|
||||
|
||||
static int __init is_normal_ram(efi_memory_desc_t *md)
|
||||
{
|
||||
if (md->attribute & EFI_MEMORY_WB)
|
||||
return 1;
|
||||
return 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* Translate a EFI virtual address into a physical address: this is necessary,
|
||||
* as some data members of the EFI system table are virtually remapped after
|
||||
* SetVirtualAddressMap() has been called.
|
||||
*/
|
||||
static phys_addr_t efi_to_phys(unsigned long addr)
|
||||
{
|
||||
efi_memory_desc_t *md;
|
||||
|
||||
for_each_efi_memory_desc(&memmap, md) {
|
||||
if (!(md->attribute & EFI_MEMORY_RUNTIME))
|
||||
continue;
|
||||
if (md->virt_addr == 0)
|
||||
/* no virtual mapping has been installed by the stub */
|
||||
break;
|
||||
if (md->virt_addr <= addr &&
|
||||
(addr - md->virt_addr) < (md->num_pages << EFI_PAGE_SHIFT))
|
||||
return md->phys_addr + addr - md->virt_addr;
|
||||
}
|
||||
return addr;
|
||||
}
|
||||
|
||||
static int __init uefi_init(void)
|
||||
{
|
||||
efi_char16_t *c16;
|
||||
void *config_tables;
|
||||
size_t table_size;
|
||||
char vendor[100] = "unknown";
|
||||
int i, retval;
|
||||
|
||||
efi.systab = early_memremap(efi_system_table,
|
||||
sizeof(efi_system_table_t));
|
||||
if (efi.systab == NULL) {
|
||||
pr_warn("Unable to map EFI system table.\n");
|
||||
return -ENOMEM;
|
||||
}
|
||||
|
||||
set_bit(EFI_BOOT, &efi.flags);
|
||||
if (IS_ENABLED(CONFIG_64BIT))
|
||||
set_bit(EFI_64BIT, &efi.flags);
|
||||
|
||||
/*
|
||||
* Verify the EFI Table
|
||||
*/
|
||||
if (efi.systab->hdr.signature != EFI_SYSTEM_TABLE_SIGNATURE) {
|
||||
pr_err("System table signature incorrect\n");
|
||||
retval = -EINVAL;
|
||||
goto out;
|
||||
}
|
||||
if ((efi.systab->hdr.revision >> 16) < 2)
|
||||
pr_warn("Warning: EFI system table version %d.%02d, expected 2.00 or greater\n",
|
||||
efi.systab->hdr.revision >> 16,
|
||||
efi.systab->hdr.revision & 0xffff);
|
||||
|
||||
/* Show what we know for posterity */
|
||||
c16 = early_memremap(efi_to_phys(efi.systab->fw_vendor),
|
||||
sizeof(vendor) * sizeof(efi_char16_t));
|
||||
if (c16) {
|
||||
for (i = 0; i < (int) sizeof(vendor) - 1 && *c16; ++i)
|
||||
vendor[i] = c16[i];
|
||||
vendor[i] = '\0';
|
||||
early_memunmap(c16, sizeof(vendor) * sizeof(efi_char16_t));
|
||||
}
|
||||
|
||||
pr_info("EFI v%u.%.02u by %s\n",
|
||||
efi.systab->hdr.revision >> 16,
|
||||
efi.systab->hdr.revision & 0xffff, vendor);
|
||||
|
||||
table_size = sizeof(efi_config_table_64_t) * efi.systab->nr_tables;
|
||||
config_tables = early_memremap(efi_to_phys(efi.systab->tables),
|
||||
table_size);
|
||||
if (config_tables == NULL) {
|
||||
pr_warn("Unable to map EFI config table array.\n");
|
||||
retval = -ENOMEM;
|
||||
goto out;
|
||||
}
|
||||
retval = efi_config_parse_tables(config_tables, efi.systab->nr_tables,
|
||||
sizeof(efi_config_table_t), NULL);
|
||||
|
||||
early_memunmap(config_tables, table_size);
|
||||
out:
|
||||
early_memunmap(efi.systab, sizeof(efi_system_table_t));
|
||||
return retval;
|
||||
}
|
||||
|
||||
/*
|
||||
* Return true for RAM regions we want to permanently reserve.
|
||||
*/
|
||||
static __init int is_reserve_region(efi_memory_desc_t *md)
|
||||
{
|
||||
switch (md->type) {
|
||||
case EFI_LOADER_CODE:
|
||||
case EFI_LOADER_DATA:
|
||||
case EFI_BOOT_SERVICES_CODE:
|
||||
case EFI_BOOT_SERVICES_DATA:
|
||||
case EFI_CONVENTIONAL_MEMORY:
|
||||
case EFI_PERSISTENT_MEMORY:
|
||||
return 0;
|
||||
default:
|
||||
break;
|
||||
}
|
||||
return is_normal_ram(md);
|
||||
}
|
||||
|
||||
static __init void reserve_regions(void)
|
||||
{
|
||||
efi_memory_desc_t *md;
|
||||
u64 paddr, npages, size;
|
||||
|
||||
if (efi_enabled(EFI_DBG))
|
||||
pr_info("Processing EFI memory map:\n");
|
||||
|
||||
for_each_efi_memory_desc(&memmap, md) {
|
||||
paddr = md->phys_addr;
|
||||
npages = md->num_pages;
|
||||
|
||||
if (efi_enabled(EFI_DBG)) {
|
||||
char buf[64];
|
||||
|
||||
pr_info(" 0x%012llx-0x%012llx %s",
|
||||
paddr, paddr + (npages << EFI_PAGE_SHIFT) - 1,
|
||||
efi_md_typeattr_format(buf, sizeof(buf), md));
|
||||
}
|
||||
|
||||
memrange_efi_to_native(&paddr, &npages);
|
||||
size = npages << PAGE_SHIFT;
|
||||
|
||||
if (is_normal_ram(md))
|
||||
early_init_dt_add_memory_arch(paddr, size);
|
||||
|
||||
if (is_reserve_region(md)) {
|
||||
memblock_mark_nomap(paddr, size);
|
||||
if (efi_enabled(EFI_DBG))
|
||||
pr_cont("*");
|
||||
}
|
||||
|
||||
if (efi_enabled(EFI_DBG))
|
||||
pr_cont("\n");
|
||||
}
|
||||
|
||||
set_bit(EFI_MEMMAP, &efi.flags);
|
||||
}
|
||||
|
||||
void __init efi_init(void)
|
||||
{
|
||||
struct efi_fdt_params params;
|
||||
|
||||
/* Grab UEFI information placed in FDT by stub */
|
||||
if (!efi_get_fdt_params(¶ms))
|
||||
return;
|
||||
|
||||
efi_system_table = params.system_table;
|
||||
|
||||
memmap.phys_map = params.mmap;
|
||||
memmap.map = early_memremap(params.mmap, params.mmap_size);
|
||||
if (memmap.map == NULL) {
|
||||
/*
|
||||
* If we are booting via UEFI, the UEFI memory map is the only
|
||||
* description of memory we have, so there is little point in
|
||||
* proceeding if we cannot access it.
|
||||
*/
|
||||
panic("Unable to map EFI memory map.\n");
|
||||
}
|
||||
memmap.map_end = memmap.map + params.mmap_size;
|
||||
memmap.desc_size = params.desc_size;
|
||||
memmap.desc_version = params.desc_ver;
|
||||
|
||||
if (uefi_init() < 0)
|
||||
return;
|
||||
|
||||
reserve_regions();
|
||||
early_memunmap(memmap.map, params.mmap_size);
|
||||
memblock_mark_nomap(params.mmap & PAGE_MASK,
|
||||
PAGE_ALIGN(params.mmap_size +
|
||||
(params.mmap & ~PAGE_MASK)));
|
||||
}
|
135
drivers/firmware/efi/arm-runtime.c
Normal file
135
drivers/firmware/efi/arm-runtime.c
Normal file
@ -0,0 +1,135 @@
|
||||
/*
|
||||
* Extensible Firmware Interface
|
||||
*
|
||||
* Based on Extensible Firmware Interface Specification version 2.4
|
||||
*
|
||||
* Copyright (C) 2013, 2014 Linaro Ltd.
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License version 2 as
|
||||
* published by the Free Software Foundation.
|
||||
*
|
||||
*/
|
||||
|
||||
#include <linux/efi.h>
|
||||
#include <linux/io.h>
|
||||
#include <linux/memblock.h>
|
||||
#include <linux/mm_types.h>
|
||||
#include <linux/preempt.h>
|
||||
#include <linux/rbtree.h>
|
||||
#include <linux/rwsem.h>
|
||||
#include <linux/sched.h>
|
||||
#include <linux/slab.h>
|
||||
#include <linux/spinlock.h>
|
||||
|
||||
#include <asm/cacheflush.h>
|
||||
#include <asm/efi.h>
|
||||
#include <asm/mmu.h>
|
||||
#include <asm/pgalloc.h>
|
||||
#include <asm/pgtable.h>
|
||||
|
||||
extern u64 efi_system_table;
|
||||
|
||||
static struct mm_struct efi_mm = {
|
||||
.mm_rb = RB_ROOT,
|
||||
.mm_users = ATOMIC_INIT(2),
|
||||
.mm_count = ATOMIC_INIT(1),
|
||||
.mmap_sem = __RWSEM_INITIALIZER(efi_mm.mmap_sem),
|
||||
.page_table_lock = __SPIN_LOCK_UNLOCKED(efi_mm.page_table_lock),
|
||||
.mmlist = LIST_HEAD_INIT(efi_mm.mmlist),
|
||||
};
|
||||
|
||||
static bool __init efi_virtmap_init(void)
|
||||
{
|
||||
efi_memory_desc_t *md;
|
||||
|
||||
efi_mm.pgd = pgd_alloc(&efi_mm);
|
||||
init_new_context(NULL, &efi_mm);
|
||||
|
||||
for_each_efi_memory_desc(&memmap, md) {
|
||||
phys_addr_t phys = md->phys_addr;
|
||||
int ret;
|
||||
|
||||
if (!(md->attribute & EFI_MEMORY_RUNTIME))
|
||||
continue;
|
||||
if (md->virt_addr == 0)
|
||||
return false;
|
||||
|
||||
ret = efi_create_mapping(&efi_mm, md);
|
||||
if (!ret) {
|
||||
pr_info(" EFI remap %pa => %p\n",
|
||||
&phys, (void *)(unsigned long)md->virt_addr);
|
||||
} else {
|
||||
pr_warn(" EFI remap %pa: failed to create mapping (%d)\n",
|
||||
&phys, ret);
|
||||
return false;
|
||||
}
|
||||
}
|
||||
return true;
|
||||
}
|
||||
|
||||
/*
|
||||
* Enable the UEFI Runtime Services if all prerequisites are in place, i.e.,
|
||||
* non-early mapping of the UEFI system table and virtual mappings for all
|
||||
* EFI_MEMORY_RUNTIME regions.
|
||||
*/
|
||||
static int __init arm_enable_runtime_services(void)
|
||||
{
|
||||
u64 mapsize;
|
||||
|
||||
if (!efi_enabled(EFI_BOOT)) {
|
||||
pr_info("EFI services will not be available.\n");
|
||||
return 0;
|
||||
}
|
||||
|
||||
if (efi_runtime_disabled()) {
|
||||
pr_info("EFI runtime services will be disabled.\n");
|
||||
return 0;
|
||||
}
|
||||
|
||||
pr_info("Remapping and enabling EFI services.\n");
|
||||
|
||||
mapsize = memmap.map_end - memmap.map;
|
||||
memmap.map = (__force void *)ioremap_cache(memmap.phys_map,
|
||||
mapsize);
|
||||
if (!memmap.map) {
|
||||
pr_err("Failed to remap EFI memory map\n");
|
||||
return -ENOMEM;
|
||||
}
|
||||
memmap.map_end = memmap.map + mapsize;
|
||||
efi.memmap = &memmap;
|
||||
|
||||
efi.systab = (__force void *)ioremap_cache(efi_system_table,
|
||||
sizeof(efi_system_table_t));
|
||||
if (!efi.systab) {
|
||||
pr_err("Failed to remap EFI System Table\n");
|
||||
return -ENOMEM;
|
||||
}
|
||||
set_bit(EFI_SYSTEM_TABLES, &efi.flags);
|
||||
|
||||
if (!efi_virtmap_init()) {
|
||||
pr_err("No UEFI virtual mapping was installed -- runtime services will not be available\n");
|
||||
return -ENOMEM;
|
||||
}
|
||||
|
||||
/* Set up runtime services function pointers */
|
||||
efi_native_runtime_setup();
|
||||
set_bit(EFI_RUNTIME_SERVICES, &efi.flags);
|
||||
|
||||
efi.runtime_version = efi.systab->hdr.revision;
|
||||
|
||||
return 0;
|
||||
}
|
||||
early_initcall(arm_enable_runtime_services);
|
||||
|
||||
void efi_virtmap_load(void)
|
||||
{
|
||||
preempt_disable();
|
||||
efi_set_pgd(&efi_mm);
|
||||
}
|
||||
|
||||
void efi_virtmap_unload(void)
|
||||
{
|
||||
efi_set_pgd(current->active_mm);
|
||||
preempt_enable();
|
||||
}
|
@ -25,6 +25,8 @@
|
||||
#include <linux/io.h>
|
||||
#include <linux/platform_device.h>
|
||||
|
||||
#include <asm/efi.h>
|
||||
|
||||
struct efi __read_mostly efi = {
|
||||
.mps = EFI_INVALID_TABLE_ADDR,
|
||||
.acpi = EFI_INVALID_TABLE_ADDR,
|
||||
|
@ -25,6 +25,7 @@ enum {
|
||||
MEMBLOCK_NONE = 0x0, /* No special request */
|
||||
MEMBLOCK_HOTPLUG = 0x1, /* hotpluggable region */
|
||||
MEMBLOCK_MIRROR = 0x2, /* mirrored region */
|
||||
MEMBLOCK_NOMAP = 0x4, /* don't add to kernel direct mapping */
|
||||
};
|
||||
|
||||
struct memblock_region {
|
||||
@ -82,6 +83,7 @@ bool memblock_overlaps_region(struct memblock_type *type,
|
||||
int memblock_mark_hotplug(phys_addr_t base, phys_addr_t size);
|
||||
int memblock_clear_hotplug(phys_addr_t base, phys_addr_t size);
|
||||
int memblock_mark_mirror(phys_addr_t base, phys_addr_t size);
|
||||
int memblock_mark_nomap(phys_addr_t base, phys_addr_t size);
|
||||
ulong choose_memblock_flags(void);
|
||||
|
||||
/* Low level functions */
|
||||
@ -184,6 +186,11 @@ static inline bool memblock_is_mirror(struct memblock_region *m)
|
||||
return m->flags & MEMBLOCK_MIRROR;
|
||||
}
|
||||
|
||||
static inline bool memblock_is_nomap(struct memblock_region *m)
|
||||
{
|
||||
return m->flags & MEMBLOCK_NOMAP;
|
||||
}
|
||||
|
||||
#ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP
|
||||
int memblock_search_pfn_nid(unsigned long pfn, unsigned long *start_pfn,
|
||||
unsigned long *end_pfn);
|
||||
@ -319,6 +326,7 @@ phys_addr_t memblock_start_of_DRAM(void);
|
||||
phys_addr_t memblock_end_of_DRAM(void);
|
||||
void memblock_enforce_memory_limit(phys_addr_t memory_limit);
|
||||
int memblock_is_memory(phys_addr_t addr);
|
||||
int memblock_is_map_memory(phys_addr_t addr);
|
||||
int memblock_is_region_memory(phys_addr_t base, phys_addr_t size);
|
||||
int memblock_is_reserved(phys_addr_t addr);
|
||||
bool memblock_is_region_reserved(phys_addr_t base, phys_addr_t size);
|
||||
|
@ -822,6 +822,17 @@ int __init_memblock memblock_mark_mirror(phys_addr_t base, phys_addr_t size)
|
||||
return memblock_setclr_flag(base, size, 1, MEMBLOCK_MIRROR);
|
||||
}
|
||||
|
||||
/**
|
||||
* memblock_mark_nomap - Mark a memory region with flag MEMBLOCK_NOMAP.
|
||||
* @base: the base phys addr of the region
|
||||
* @size: the size of the region
|
||||
*
|
||||
* Return 0 on success, -errno on failure.
|
||||
*/
|
||||
int __init_memblock memblock_mark_nomap(phys_addr_t base, phys_addr_t size)
|
||||
{
|
||||
return memblock_setclr_flag(base, size, 1, MEMBLOCK_NOMAP);
|
||||
}
|
||||
|
||||
/**
|
||||
* __next_reserved_mem_region - next function for for_each_reserved_region()
|
||||
@ -913,6 +924,10 @@ void __init_memblock __next_mem_range(u64 *idx, int nid, ulong flags,
|
||||
if ((flags & MEMBLOCK_MIRROR) && !memblock_is_mirror(m))
|
||||
continue;
|
||||
|
||||
/* skip nomap memory unless we were asked for it explicitly */
|
||||
if (!(flags & MEMBLOCK_NOMAP) && memblock_is_nomap(m))
|
||||
continue;
|
||||
|
||||
if (!type_b) {
|
||||
if (out_start)
|
||||
*out_start = m_start;
|
||||
@ -1022,6 +1037,10 @@ void __init_memblock __next_mem_range_rev(u64 *idx, int nid, ulong flags,
|
||||
if ((flags & MEMBLOCK_MIRROR) && !memblock_is_mirror(m))
|
||||
continue;
|
||||
|
||||
/* skip nomap memory unless we were asked for it explicitly */
|
||||
if (!(flags & MEMBLOCK_NOMAP) && memblock_is_nomap(m))
|
||||
continue;
|
||||
|
||||
if (!type_b) {
|
||||
if (out_start)
|
||||
*out_start = m_start;
|
||||
@ -1519,6 +1538,15 @@ int __init_memblock memblock_is_memory(phys_addr_t addr)
|
||||
return memblock_search(&memblock.memory, addr) != -1;
|
||||
}
|
||||
|
||||
int __init_memblock memblock_is_map_memory(phys_addr_t addr)
|
||||
{
|
||||
int i = memblock_search(&memblock.memory, addr);
|
||||
|
||||
if (i == -1)
|
||||
return false;
|
||||
return !memblock_is_nomap(&memblock.memory.regions[i]);
|
||||
}
|
||||
|
||||
#ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP
|
||||
int __init_memblock memblock_search_pfn_nid(unsigned long pfn,
|
||||
unsigned long *start_pfn, unsigned long *end_pfn)
|
||||
|
Loading…
Reference in New Issue
Block a user