diff options
Diffstat (limited to 'arch/x86/platform')
| -rw-r--r-- | arch/x86/platform/efi/Makefile | 1 | ||||
| -rw-r--r-- | arch/x86/platform/efi/efi.c | 2 | ||||
| -rw-r--r-- | arch/x86/platform/efi/fake_mem.c | 197 | ||||
| -rw-r--r-- | arch/x86/platform/efi/memmap.c | 13 | ||||
| -rw-r--r-- | arch/x86/platform/intel/iosf_mbi.c | 4 |
5 files changed, 14 insertions, 203 deletions
diff --git a/arch/x86/platform/efi/Makefile b/arch/x86/platform/efi/Makefile index 543df9a1379d..500cab4a7f7c 100644 --- a/arch/x86/platform/efi/Makefile +++ b/arch/x86/platform/efi/Makefile @@ -5,5 +5,4 @@ GCOV_PROFILE := n obj-$(CONFIG_EFI) += memmap.o quirks.o efi.o efi_$(BITS).o \ efi_stub_$(BITS).o obj-$(CONFIG_EFI_MIXED) += efi_thunk_$(BITS).o -obj-$(CONFIG_EFI_FAKE_MEMMAP) += fake_mem.o obj-$(CONFIG_EFI_RUNTIME_MAP) += runtime-map.o diff --git a/arch/x86/platform/efi/efi.c b/arch/x86/platform/efi/efi.c index f090ec972d7b..88a96816de9a 100644 --- a/arch/x86/platform/efi/efi.c +++ b/arch/x86/platform/efi/efi.c @@ -226,8 +226,6 @@ int __init efi_memblock_x86_reserve_range(void) if (add_efi_memmap || do_efi_soft_reserve()) do_add_efi_memmap(); - efi_fake_memmap_early(); - WARN(efi.memmap.desc_version != 1, "Unexpected EFI_MEMORY_DESCRIPTOR version %ld", efi.memmap.desc_version); diff --git a/arch/x86/platform/efi/fake_mem.c b/arch/x86/platform/efi/fake_mem.c deleted file mode 100644 index 41d57cad3d84..000000000000 --- a/arch/x86/platform/efi/fake_mem.c +++ /dev/null @@ -1,197 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * fake_mem.c - * - * Copyright (C) 2015 FUJITSU LIMITED - * Author: Taku Izumi <izumi.taku@jp.fujitsu.com> - * - * This code introduces new boot option named "efi_fake_mem" - * By specifying this parameter, you can add arbitrary attribute to - * specific memory range by updating original (firmware provided) EFI - * memmap. - */ - -#include <linux/kernel.h> -#include <linux/efi.h> -#include <linux/init.h> -#include <linux/memblock.h> -#include <linux/types.h> -#include <linux/sort.h> -#include <asm/e820/api.h> -#include <asm/efi.h> - -#define EFI_MAX_FAKEMEM CONFIG_EFI_MAX_FAKE_MEM - -static struct efi_mem_range efi_fake_mems[EFI_MAX_FAKEMEM]; -static int nr_fake_mem; - -static int __init cmp_fake_mem(const void *x1, const void *x2) -{ - const struct efi_mem_range *m1 = x1; - const struct efi_mem_range *m2 = x2; - - if (m1->range.start < m2->range.start) - return -1; - if (m1->range.start > m2->range.start) - return 1; - return 0; -} - -static void __init efi_fake_range(struct efi_mem_range *efi_range) -{ - struct efi_memory_map_data data = { 0 }; - int new_nr_map = efi.memmap.nr_map; - efi_memory_desc_t *md; - void *new_memmap; - - /* count up the number of EFI memory descriptor */ - for_each_efi_memory_desc(md) - new_nr_map += efi_memmap_split_count(md, &efi_range->range); - - /* allocate memory for new EFI memmap */ - if (efi_memmap_alloc(new_nr_map, &data) != 0) - return; - - /* create new EFI memmap */ - new_memmap = early_memremap(data.phys_map, data.size); - if (!new_memmap) { - __efi_memmap_free(data.phys_map, data.size, data.flags); - return; - } - - efi_memmap_insert(&efi.memmap, new_memmap, efi_range); - - /* swap into new EFI memmap */ - early_memunmap(new_memmap, data.size); - - efi_memmap_install(&data); -} - -void __init efi_fake_memmap(void) -{ - int i; - - if (!efi_enabled(EFI_MEMMAP) || !nr_fake_mem) - return; - - for (i = 0; i < nr_fake_mem; i++) - efi_fake_range(&efi_fake_mems[i]); - - /* print new EFI memmap */ - efi_print_memmap(); -} - -static int __init setup_fake_mem(char *p) -{ - u64 start = 0, mem_size = 0, attribute = 0; - int i; - - if (!p) - return -EINVAL; - - while (*p != '\0') { - mem_size = memparse(p, &p); - if (*p == '@') - start = memparse(p+1, &p); - else - break; - - if (*p == ':') - attribute = simple_strtoull(p+1, &p, 0); - else - break; - - if (nr_fake_mem >= EFI_MAX_FAKEMEM) - break; - - efi_fake_mems[nr_fake_mem].range.start = start; - efi_fake_mems[nr_fake_mem].range.end = start + mem_size - 1; - efi_fake_mems[nr_fake_mem].attribute = attribute; - nr_fake_mem++; - - if (*p == ',') - p++; - } - - sort(efi_fake_mems, nr_fake_mem, sizeof(struct efi_mem_range), - cmp_fake_mem, NULL); - - for (i = 0; i < nr_fake_mem; i++) - pr_info("efi_fake_mem: add attr=0x%016llx to [mem 0x%016llx-0x%016llx]", - efi_fake_mems[i].attribute, efi_fake_mems[i].range.start, - efi_fake_mems[i].range.end); - - return *p == '\0' ? 0 : -EINVAL; -} - -early_param("efi_fake_mem", setup_fake_mem); - -void __init efi_fake_memmap_early(void) -{ - int i; - - /* - * The late efi_fake_mem() call can handle all requests if - * EFI_MEMORY_SP support is disabled. - */ - if (!efi_soft_reserve_enabled()) - return; - - if (!efi_enabled(EFI_MEMMAP) || !nr_fake_mem) - return; - - /* - * Given that efi_fake_memmap() needs to perform memblock - * allocations it needs to run after e820__memblock_setup(). - * However, if efi_fake_mem specifies EFI_MEMORY_SP for a given - * address range that potentially needs to mark the memory as - * reserved prior to e820__memblock_setup(). Update e820 - * directly if EFI_MEMORY_SP is specified for an - * EFI_CONVENTIONAL_MEMORY descriptor. - */ - for (i = 0; i < nr_fake_mem; i++) { - struct efi_mem_range *mem = &efi_fake_mems[i]; - efi_memory_desc_t *md; - u64 m_start, m_end; - - if ((mem->attribute & EFI_MEMORY_SP) == 0) - continue; - - m_start = mem->range.start; - m_end = mem->range.end; - for_each_efi_memory_desc(md) { - u64 start, end, size; - - if (md->type != EFI_CONVENTIONAL_MEMORY) - continue; - - start = md->phys_addr; - end = md->phys_addr + (md->num_pages << EFI_PAGE_SHIFT) - 1; - - if (m_start <= end && m_end >= start) - /* fake range overlaps descriptor */; - else - continue; - - /* - * Trim the boundary of the e820 update to the - * descriptor in case the fake range overlaps - * !EFI_CONVENTIONAL_MEMORY - */ - start = max(start, m_start); - end = min(end, m_end); - size = end - start + 1; - - if (end <= start) - continue; - - /* - * Ensure each efi_fake_mem instance results in - * a unique e820 resource - */ - e820__range_remove(start, size, E820_TYPE_RAM, 1); - e820__range_add(start, size, E820_TYPE_SOFT_RESERVED); - e820__update_table(e820_table); - } - } -} diff --git a/arch/x86/platform/efi/memmap.c b/arch/x86/platform/efi/memmap.c index 4ef20b49eb5e..061b8ecc71a1 100644 --- a/arch/x86/platform/efi/memmap.c +++ b/arch/x86/platform/efi/memmap.c @@ -30,6 +30,7 @@ static phys_addr_t __init __efi_memmap_alloc_late(unsigned long size) return PFN_PHYS(page_to_pfn(p)); } +static void __init __efi_memmap_free(u64 phys, unsigned long size, unsigned long flags) { if (flags & EFI_MEMMAP_MEMBLOCK) { @@ -92,12 +93,22 @@ int __init efi_memmap_alloc(unsigned int num_entries, */ int __init efi_memmap_install(struct efi_memory_map_data *data) { + unsigned long size = efi.memmap.desc_size * efi.memmap.nr_map; + unsigned long flags = efi.memmap.flags; + u64 phys = efi.memmap.phys_map; + int ret; + efi_memmap_unmap(); if (efi_enabled(EFI_PARAVIRT)) return 0; - return __efi_memmap_init(data); + ret = __efi_memmap_init(data); + if (ret) + return ret; + + __efi_memmap_free(phys, size, flags); + return 0; } /** diff --git a/arch/x86/platform/intel/iosf_mbi.c b/arch/x86/platform/intel/iosf_mbi.c index fdd49d70b437..c81cea208c2c 100644 --- a/arch/x86/platform/intel/iosf_mbi.c +++ b/arch/x86/platform/intel/iosf_mbi.c @@ -62,7 +62,7 @@ static int iosf_mbi_pci_read_mdr(u32 mcrx, u32 mcr, u32 *mdr) fail_read: dev_err(&mbi_pdev->dev, "PCI config access failed with %d\n", result); - return result; + return pcibios_err_to_errno(result); } static int iosf_mbi_pci_write_mdr(u32 mcrx, u32 mcr, u32 mdr) @@ -91,7 +91,7 @@ static int iosf_mbi_pci_write_mdr(u32 mcrx, u32 mcr, u32 mdr) fail_write: dev_err(&mbi_pdev->dev, "PCI config access failed with %d\n", result); - return result; + return pcibios_err_to_errno(result); } int iosf_mbi_read(u8 port, u8 opcode, u32 offset, u32 *mdr) |