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Merge branch 'efi-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

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Pull EFI fixes from Ingo Molnar:
 "Two fixes: a large-system fix and an earlyprintk fix with certain
  resolutions"

* 'efi-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/earlyprintk/efi: Fix infinite loop on some screen widths
  x86/efi: Allocate e820 buffer before calling efi_exit_boot_service
This commit is contained in:
Linus Torvalds 2018-12-09 14:03:56 -08:00
commit 4b04e73a78
2 changed files with 42 additions and 25 deletions
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65
arch/x86/boot/compressed/eboot.c
View File

@ -1,3 +1,4 @@
/* -----------------------------------------------------------------------
*
* Copyright 2011 Intel Corporation; author Matt Fleming
@ -634,37 +635,54 @@ static efi_status_t alloc_e820ext(u32 nr_desc, struct setup_data **e820ext,
return status;
}
static efi_status_t allocate_e820(struct boot_params *params,
struct setup_data **e820ext,
u32 *e820ext_size)
{
unsigned long map_size, desc_size, buff_size;
struct efi_boot_memmap boot_map;
efi_memory_desc_t *map;
efi_status_t status;
__u32 nr_desc;
boot_map.map = ↦
boot_map.map_size = &map_size;
boot_map.desc_size = &desc_size;
boot_map.desc_ver = NULL;
boot_map.key_ptr = NULL;
boot_map.buff_size = &buff_size;
status = efi_get_memory_map(sys_table, &boot_map);
if (status != EFI_SUCCESS)
return status;
nr_desc = buff_size / desc_size;
if (nr_desc > ARRAY_SIZE(params->e820_table)) {
u32 nr_e820ext = nr_desc - ARRAY_SIZE(params->e820_table);
status = alloc_e820ext(nr_e820ext, e820ext, e820ext_size);
if (status != EFI_SUCCESS)
return status;
}
return EFI_SUCCESS;
}
struct exit_boot_struct {
struct boot_params *boot_params;
struct efi_info *efi;
struct setup_data *e820ext;
__u32 e820ext_size;
};
static efi_status_t exit_boot_func(efi_system_table_t *sys_table_arg,
struct efi_boot_memmap *map,
void *priv)
{
static bool first = true;
const char *signature;
__u32 nr_desc;
efi_status_t status;
struct exit_boot_struct *p = priv;
if (first) {
nr_desc = *map->buff_size / *map->desc_size;
if (nr_desc > ARRAY_SIZE(p->boot_params->e820_table)) {
u32 nr_e820ext = nr_desc -
ARRAY_SIZE(p->boot_params->e820_table);
status = alloc_e820ext(nr_e820ext, &p->e820ext,
&p->e820ext_size);
if (status != EFI_SUCCESS)
return status;
}
first = false;
}
signature = efi_is_64bit() ? EFI64_LOADER_SIGNATURE
: EFI32_LOADER_SIGNATURE;
memcpy(&p->efi->efi_loader_signature, signature, sizeof(__u32));
@ -687,8 +705,8 @@ static efi_status_t exit_boot(struct boot_params *boot_params, void *handle)
{
unsigned long map_sz, key, desc_size, buff_size;
efi_memory_desc_t *mem_map;
struct setup_data *e820ext;
__u32 e820ext_size;
struct setup_data *e820ext = NULL;
__u32 e820ext_size = 0;
efi_status_t status;
__u32 desc_version;
struct efi_boot_memmap map;
@ -702,8 +720,10 @@ static efi_status_t exit_boot(struct boot_params *boot_params, void *handle)
map.buff_size = &buff_size;
priv.boot_params = boot_params;
priv.efi = &boot_params->efi_info;
priv.e820ext = NULL;
priv.e820ext_size = 0;
status = allocate_e820(boot_params, &e820ext, &e820ext_size);
if (status != EFI_SUCCESS)
return status;
/* Might as well exit boot services now */
status = efi_exit_boot_services(sys_table, handle, &map, &priv,
@ -711,9 +731,6 @@ static efi_status_t exit_boot(struct boot_params *boot_params, void *handle)
if (status != EFI_SUCCESS)
return status;
e820ext = priv.e820ext;
e820ext_size = priv.e820ext_size;
/* Historic? */
boot_params->alt_mem_k = 32 * 1024;

2
arch/x86/platform/efi/early_printk.c
View File

@ -183,7 +183,7 @@ early_efi_write(struct console *con, const char *str, unsigned int num)
num--;
}
if (efi_x >= si->lfb_width) {
if (efi_x + font->width > si->lfb_width) {
efi_x = 0;
efi_y += font->height;
}