#include <asm/mach/map.h>
#include <asm/mmu_context.h>
#include <asm/pgtable.h>
+#include <asm/ptrace.h>
#ifdef CONFIG_EFI
void efi_init(void);
int efi_create_mapping(struct mm_struct *mm, efi_memory_desc_t *md);
+int efi_set_mapping_permissions(struct mm_struct *mm, efi_memory_desc_t *md);
-#define efi_call_virt(f, ...) \
-({ \
- efi_##f##_t *__f; \
- efi_status_t __s; \
- \
- efi_virtmap_load(); \
- __f = efi.systab->runtime->f; \
- __s = __f(__VA_ARGS__); \
- efi_virtmap_unload(); \
- __s; \
-})
+#define arch_efi_call_virt_setup() efi_virtmap_load()
+#define arch_efi_call_virt_teardown() efi_virtmap_unload()
-#define __efi_call_virt(f, ...) \
+#define arch_efi_call_virt(f, args...) \
({ \
efi_##f##_t *__f; \
- \
- efi_virtmap_load(); \
__f = efi.systab->runtime->f; \
- __f(__VA_ARGS__); \
- efi_virtmap_unload(); \
+ __f(args); \
})
+#define ARCH_EFI_IRQ_FLAGS_MASK \
+ (PSR_J_BIT | PSR_E_BIT | PSR_A_BIT | PSR_I_BIT | PSR_F_BIT | \
+ PSR_T_BIT | MODE_MASK)
+
static inline void efi_set_pgd(struct mm_struct *mm)
{
check_and_switch_context(mm, NULL);
/* arch specific definitions used by the stub code */
-#define efi_call_early(f, ...) sys_table_arg->boottime->f(__VA_ARGS__)
+#define efi_call_early(f, ...) sys_table_arg->boottime->f(__VA_ARGS__)
+#define __efi_call_early(f, ...) f(__VA_ARGS__)
+#define efi_is_64bit() (false)
+
+struct screen_info *alloc_screen_info(efi_system_table_t *sys_table_arg);
+void free_screen_info(efi_system_table_t *sys_table, struct screen_info *si);
+
+static inline void efifb_setup_from_dmi(struct screen_info *si, const char *opt)
+{
+}
/*
* A reasonable upper bound for the uncompressed kernel size is 32 MBytes,
#include <asm/mach/map.h>
#include <asm/mmu_context.h>
+static int __init set_permissions(pte_t *ptep, pgtable_t token,
+ unsigned long addr, void *data)
+{
+ efi_memory_desc_t *md = data;
+ pte_t pte = *ptep;
+
+ if (md->attribute & EFI_MEMORY_RO)
+ pte = set_pte_bit(pte, __pgprot(L_PTE_RDONLY));
+ if (md->attribute & EFI_MEMORY_XP)
+ pte = set_pte_bit(pte, __pgprot(L_PTE_XN));
+ set_pte_ext(ptep, pte, PTE_EXT_NG);
+ return 0;
+}
+
+int __init efi_set_mapping_permissions(struct mm_struct *mm,
+ efi_memory_desc_t *md)
+{
+ unsigned long base, size;
+
+ base = md->virt_addr;
+ size = md->num_pages << EFI_PAGE_SHIFT;
+
+ /*
+ * We can only use apply_to_page_range() if we can guarantee that the
+ * entire region was mapped using pages. This should be the case if the
+ * region does not cover any naturally aligned SECTION_SIZE sized
+ * blocks.
+ */
+ if (round_down(base + size, SECTION_SIZE) <
+ round_up(base, SECTION_SIZE) + SECTION_SIZE)
+ return apply_to_page_range(mm, base, size, set_permissions, md);
+
+ return 0;
+}
+
int __init efi_create_mapping(struct mm_struct *mm, efi_memory_desc_t *md)
{
struct map_desc desc = {
desc.type = MT_DEVICE;
create_mapping_late(mm, &desc, true);
+
+ /*
+ * If stricter permissions were specified, apply them now.
+ */
+ if (md->attribute & (EFI_MEMORY_RO | EFI_MEMORY_XP))
+ return efi_set_mapping_permissions(mm, md);
return 0;
}
request_resource(&ioport_resource, &lp2);
}
-#if defined(CONFIG_VGA_CONSOLE) || defined(CONFIG_DUMMY_CONSOLE)
+#if defined(CONFIG_VGA_CONSOLE) || defined(CONFIG_DUMMY_CONSOLE) || \
+ defined(CONFIG_EFI)
struct screen_info screen_info = {
.orig_video_lines = 30,
.orig_video_cols = 80,
#include <asm/io.h>
#include <asm/mmu_context.h>
#include <asm/neon.h>
+#include <asm/ptrace.h>
#include <asm/tlbflush.h>
#ifdef CONFIG_EFI
int efi_create_mapping(struct mm_struct *mm, efi_memory_desc_t *md);
-#define efi_call_virt(f, ...) \
+#define efi_set_mapping_permissions efi_create_mapping
+
+#define arch_efi_call_virt_setup() \
({ \
- efi_##f##_t *__f; \
- efi_status_t __s; \
- \
kernel_neon_begin(); \
efi_virtmap_load(); \
- __f = efi.systab->runtime->f; \
- __s = __f(__VA_ARGS__); \
- efi_virtmap_unload(); \
- kernel_neon_end(); \
- __s; \
})
-#define __efi_call_virt(f, ...) \
+#define arch_efi_call_virt(f, args...) \
({ \
efi_##f##_t *__f; \
- \
- kernel_neon_begin(); \
- efi_virtmap_load(); \
__f = efi.systab->runtime->f; \
- __f(__VA_ARGS__); \
+ __f(args); \
+})
+
+#define arch_efi_call_virt_teardown() \
+({ \
efi_virtmap_unload(); \
kernel_neon_end(); \
})
+#define ARCH_EFI_IRQ_FLAGS_MASK (PSR_D_BIT | PSR_A_BIT | PSR_I_BIT | PSR_F_BIT)
+
/* arch specific definitions used by the stub code */
/*
#define EFI_FDT_ALIGN SZ_2M /* used by allocate_new_fdt_and_exit_boot() */
#define MAX_FDT_OFFSET SZ_512M
-#define efi_call_early(f, ...) sys_table_arg->boottime->f(__VA_ARGS__)
+#define efi_call_early(f, ...) sys_table_arg->boottime->f(__VA_ARGS__)
+#define __efi_call_early(f, ...) f(__VA_ARGS__)
+#define efi_is_64bit() (true)
+
+#define alloc_screen_info(x...) &screen_info
+#define free_screen_info(x...)
+
+static inline void efifb_setup_from_dmi(struct screen_info *si, const char *opt)
+{
+}
#define EFI_ALLOC_ALIGN SZ_64K
#include <asm/efi.h>
-int __init efi_create_mapping(struct mm_struct *mm, efi_memory_desc_t *md)
+/*
+ * Only regions of type EFI_RUNTIME_SERVICES_CODE need to be
+ * executable, everything else can be mapped with the XN bits
+ * set. Also take the new (optional) RO/XP bits into account.
+ */
+static __init pteval_t create_mapping_protection(efi_memory_desc_t *md)
{
- pteval_t prot_val;
+ u64 attr = md->attribute;
+ u32 type = md->type;
- /*
- * Only regions of type EFI_RUNTIME_SERVICES_CODE need to be
- * executable, everything else can be mapped with the XN bits
- * set.
- */
- 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);
+ if (type == EFI_MEMORY_MAPPED_IO)
+ return PROT_DEVICE_nGnRE;
+
+ if (WARN_ONCE(!PAGE_ALIGNED(md->phys_addr),
+ "UEFI Runtime regions are not aligned to 64 KB -- buggy firmware?"))
+ /*
+ * If the region is not aligned to the page size of the OS, we
+ * can not use strict permissions, since that would also affect
+ * the mapping attributes of the adjacent regions.
+ */
+ return pgprot_val(PAGE_KERNEL_EXEC);
+
+ /* R-- */
+ if ((attr & (EFI_MEMORY_XP | EFI_MEMORY_RO)) ==
+ (EFI_MEMORY_XP | EFI_MEMORY_RO))
+ return pgprot_val(PAGE_KERNEL_RO);
+
+ /* R-X */
+ if (attr & EFI_MEMORY_RO)
+ return pgprot_val(PAGE_KERNEL_ROX);
+
+ /* RW- */
+ if (attr & EFI_MEMORY_XP || type != EFI_RUNTIME_SERVICES_CODE)
+ return pgprot_val(PAGE_KERNEL);
+
+ /* RWX */
+ return pgprot_val(PAGE_KERNEL_EXEC);
+}
+
+/* we will fill this structure from the stub, so don't put it in .bss */
+struct screen_info screen_info __section(.data);
+
+int __init efi_create_mapping(struct mm_struct *mm, efi_memory_desc_t *md)
+{
+ pteval_t prot_val = create_mapping_protection(md);
create_pgd_mapping(mm, md->phys_addr, md->virt_addr,
md->num_pages << EFI_PAGE_SHIFT,
__efistub__text = KALLSYMS_HIDE(_text);
__efistub__end = KALLSYMS_HIDE(_end);
__efistub__edata = KALLSYMS_HIDE(_edata);
+__efistub_screen_info = KALLSYMS_HIDE(screen_info);
#endif
efi.systab->hdr.revision >> 16,
efi.systab->hdr.revision & 0xffff, vendor);
- set_bit(EFI_SYSTEM_TABLES, &efi.flags);
-
palo_phys = EFI_INVALID_TABLE_ADDR;
if (efi_config_init(arch_tables) != 0)
efi_call_early(free_pool, pci_handle);
}
-static void
-setup_pixel_info(struct screen_info *si, u32 pixels_per_scan_line,
- struct efi_pixel_bitmask pixel_info, int pixel_format)
-{
- if (pixel_format == PIXEL_RGB_RESERVED_8BIT_PER_COLOR) {
- si->lfb_depth = 32;
- si->lfb_linelength = pixels_per_scan_line * 4;
- si->red_size = 8;
- si->red_pos = 0;
- si->green_size = 8;
- si->green_pos = 8;
- si->blue_size = 8;
- si->blue_pos = 16;
- si->rsvd_size = 8;
- si->rsvd_pos = 24;
- } else if (pixel_format == PIXEL_BGR_RESERVED_8BIT_PER_COLOR) {
- si->lfb_depth = 32;
- si->lfb_linelength = pixels_per_scan_line * 4;
- si->red_size = 8;
- si->red_pos = 16;
- si->green_size = 8;
- si->green_pos = 8;
- si->blue_size = 8;
- si->blue_pos = 0;
- si->rsvd_size = 8;
- si->rsvd_pos = 24;
- } else if (pixel_format == PIXEL_BIT_MASK) {
- find_bits(pixel_info.red_mask, &si->red_pos, &si->red_size);
- find_bits(pixel_info.green_mask, &si->green_pos,
- &si->green_size);
- find_bits(pixel_info.blue_mask, &si->blue_pos, &si->blue_size);
- find_bits(pixel_info.reserved_mask, &si->rsvd_pos,
- &si->rsvd_size);
- si->lfb_depth = si->red_size + si->green_size +
- si->blue_size + si->rsvd_size;
- si->lfb_linelength = (pixels_per_scan_line * si->lfb_depth) / 8;
- } else {
- si->lfb_depth = 4;
- si->lfb_linelength = si->lfb_width / 2;
- si->red_size = 0;
- si->red_pos = 0;
- si->green_size = 0;
- si->green_pos = 0;
- si->blue_size = 0;
- si->blue_pos = 0;
- si->rsvd_size = 0;
- si->rsvd_pos = 0;
- }
-}
-
-static efi_status_t
-__gop_query32(struct efi_graphics_output_protocol_32 *gop32,
- struct efi_graphics_output_mode_info **info,
- unsigned long *size, u64 *fb_base)
-{
- struct efi_graphics_output_protocol_mode_32 *mode;
- efi_status_t status;
- unsigned long m;
-
- m = gop32->mode;
- mode = (struct efi_graphics_output_protocol_mode_32 *)m;
-
- status = efi_early->call(gop32->query_mode, gop32,
- mode->mode, size, info);
- if (status != EFI_SUCCESS)
- return status;
-
- *fb_base = mode->frame_buffer_base;
- return status;
-}
-
-static efi_status_t
-setup_gop32(struct screen_info *si, efi_guid_t *proto,
- unsigned long size, void **gop_handle)
-{
- struct efi_graphics_output_protocol_32 *gop32, *first_gop;
- unsigned long nr_gops;
- u16 width, height;
- u32 pixels_per_scan_line;
- u32 ext_lfb_base;
- u64 fb_base;
- struct efi_pixel_bitmask pixel_info;
- int pixel_format;
- efi_status_t status;
- u32 *handles = (u32 *)(unsigned long)gop_handle;
- int i;
-
- first_gop = NULL;
- gop32 = NULL;
-
- nr_gops = size / sizeof(u32);
- for (i = 0; i < nr_gops; i++) {
- struct efi_graphics_output_mode_info *info = NULL;
- efi_guid_t conout_proto = EFI_CONSOLE_OUT_DEVICE_GUID;
- bool conout_found = false;
- void *dummy = NULL;
- u32 h = handles[i];
- u64 current_fb_base;
-
- status = efi_call_early(handle_protocol, h,
- proto, (void **)&gop32);
- if (status != EFI_SUCCESS)
- continue;
-
- status = efi_call_early(handle_protocol, h,
- &conout_proto, &dummy);
- if (status == EFI_SUCCESS)
- conout_found = true;
-
- status = __gop_query32(gop32, &info, &size, ¤t_fb_base);
- if (status == EFI_SUCCESS && (!first_gop || conout_found)) {
- /*
- * Systems that use the UEFI Console Splitter may
- * provide multiple GOP devices, not all of which are
- * backed by real hardware. The workaround is to search
- * for a GOP implementing the ConOut protocol, and if
- * one isn't found, to just fall back to the first GOP.
- */
- width = info->horizontal_resolution;
- height = info->vertical_resolution;
- pixel_format = info->pixel_format;
- pixel_info = info->pixel_information;
- pixels_per_scan_line = info->pixels_per_scan_line;
- fb_base = current_fb_base;
-
- /*
- * Once we've found a GOP supporting ConOut,
- * don't bother looking any further.
- */
- first_gop = gop32;
- if (conout_found)
- break;
- }
- }
-
- /* Did we find any GOPs? */
- if (!first_gop)
- goto out;
-
- /* EFI framebuffer */
- si->orig_video_isVGA = VIDEO_TYPE_EFI;
-
- si->lfb_width = width;
- si->lfb_height = height;
- si->lfb_base = fb_base;
-
- ext_lfb_base = (u64)(unsigned long)fb_base >> 32;
- if (ext_lfb_base) {
- si->capabilities |= VIDEO_CAPABILITY_64BIT_BASE;
- si->ext_lfb_base = ext_lfb_base;
- }
-
- si->pages = 1;
-
- setup_pixel_info(si, pixels_per_scan_line, pixel_info, pixel_format);
-
- si->lfb_size = si->lfb_linelength * si->lfb_height;
-
- si->capabilities |= VIDEO_CAPABILITY_SKIP_QUIRKS;
-out:
- return status;
-}
-
-static efi_status_t
-__gop_query64(struct efi_graphics_output_protocol_64 *gop64,
- struct efi_graphics_output_mode_info **info,
- unsigned long *size, u64 *fb_base)
-{
- struct efi_graphics_output_protocol_mode_64 *mode;
- efi_status_t status;
- unsigned long m;
-
- m = gop64->mode;
- mode = (struct efi_graphics_output_protocol_mode_64 *)m;
-
- status = efi_early->call(gop64->query_mode, gop64,
- mode->mode, size, info);
- if (status != EFI_SUCCESS)
- return status;
-
- *fb_base = mode->frame_buffer_base;
- return status;
-}
-
-static efi_status_t
-setup_gop64(struct screen_info *si, efi_guid_t *proto,
- unsigned long size, void **gop_handle)
-{
- struct efi_graphics_output_protocol_64 *gop64, *first_gop;
- unsigned long nr_gops;
- u16 width, height;
- u32 pixels_per_scan_line;
- u32 ext_lfb_base;
- u64 fb_base;
- struct efi_pixel_bitmask pixel_info;
- int pixel_format;
- efi_status_t status;
- u64 *handles = (u64 *)(unsigned long)gop_handle;
- int i;
-
- first_gop = NULL;
- gop64 = NULL;
-
- nr_gops = size / sizeof(u64);
- for (i = 0; i < nr_gops; i++) {
- struct efi_graphics_output_mode_info *info = NULL;
- efi_guid_t conout_proto = EFI_CONSOLE_OUT_DEVICE_GUID;
- bool conout_found = false;
- void *dummy = NULL;
- u64 h = handles[i];
- u64 current_fb_base;
-
- status = efi_call_early(handle_protocol, h,
- proto, (void **)&gop64);
- if (status != EFI_SUCCESS)
- continue;
-
- status = efi_call_early(handle_protocol, h,
- &conout_proto, &dummy);
- if (status == EFI_SUCCESS)
- conout_found = true;
-
- status = __gop_query64(gop64, &info, &size, ¤t_fb_base);
- if (status == EFI_SUCCESS && (!first_gop || conout_found)) {
- /*
- * Systems that use the UEFI Console Splitter may
- * provide multiple GOP devices, not all of which are
- * backed by real hardware. The workaround is to search
- * for a GOP implementing the ConOut protocol, and if
- * one isn't found, to just fall back to the first GOP.
- */
- width = info->horizontal_resolution;
- height = info->vertical_resolution;
- pixel_format = info->pixel_format;
- pixel_info = info->pixel_information;
- pixels_per_scan_line = info->pixels_per_scan_line;
- fb_base = current_fb_base;
-
- /*
- * Once we've found a GOP supporting ConOut,
- * don't bother looking any further.
- */
- first_gop = gop64;
- if (conout_found)
- break;
- }
- }
-
- /* Did we find any GOPs? */
- if (!first_gop)
- goto out;
-
- /* EFI framebuffer */
- si->orig_video_isVGA = VIDEO_TYPE_EFI;
-
- si->lfb_width = width;
- si->lfb_height = height;
- si->lfb_base = fb_base;
-
- ext_lfb_base = (u64)(unsigned long)fb_base >> 32;
- if (ext_lfb_base) {
- si->capabilities |= VIDEO_CAPABILITY_64BIT_BASE;
- si->ext_lfb_base = ext_lfb_base;
- }
-
- si->pages = 1;
-
- setup_pixel_info(si, pixels_per_scan_line, pixel_info, pixel_format);
-
- si->lfb_size = si->lfb_linelength * si->lfb_height;
-
- si->capabilities |= VIDEO_CAPABILITY_SKIP_QUIRKS;
-out:
- return status;
-}
-
-/*
- * See if we have Graphics Output Protocol
- */
-static efi_status_t setup_gop(struct screen_info *si, efi_guid_t *proto,
- unsigned long size)
-{
- efi_status_t status;
- void **gop_handle = NULL;
-
- status = efi_call_early(allocate_pool, EFI_LOADER_DATA,
- size, (void **)&gop_handle);
- if (status != EFI_SUCCESS)
- return status;
-
- status = efi_call_early(locate_handle,
- EFI_LOCATE_BY_PROTOCOL,
- proto, NULL, &size, gop_handle);
- if (status != EFI_SUCCESS)
- goto free_handle;
-
- if (efi_early->is64)
- status = setup_gop64(si, proto, size, gop_handle);
- else
- status = setup_gop32(si, proto, size, gop_handle);
-
-free_handle:
- efi_call_early(free_pool, gop_handle);
- return status;
-}
-
static efi_status_t
setup_uga32(void **uga_handle, unsigned long size, u32 *width, u32 *height)
{
EFI_LOCATE_BY_PROTOCOL,
&graphics_proto, NULL, &size, gop_handle);
if (status == EFI_BUFFER_TOO_SMALL)
- status = setup_gop(si, &graphics_proto, size);
+ status = efi_setup_gop(NULL, si, &graphics_proto, size);
if (status != EFI_SUCCESS) {
size = 0;
#define DESC_TYPE_CODE_DATA (1 << 0)
-#define EFI_CONSOLE_OUT_DEVICE_GUID \
- EFI_GUID(0xd3b36f2c, 0xd551, 0x11d4, 0x9a, 0x46, 0x0, 0x90, 0x27, \
- 0x3f, 0xc1, 0x4d)
-
-#define PIXEL_RGB_RESERVED_8BIT_PER_COLOR 0
-#define PIXEL_BGR_RESERVED_8BIT_PER_COLOR 1
-#define PIXEL_BIT_MASK 2
-#define PIXEL_BLT_ONLY 3
-#define PIXEL_FORMAT_MAX 4
-
-struct efi_pixel_bitmask {
- u32 red_mask;
- u32 green_mask;
- u32 blue_mask;
- u32 reserved_mask;
-};
-
-struct efi_graphics_output_mode_info {
- u32 version;
- u32 horizontal_resolution;
- u32 vertical_resolution;
- int pixel_format;
- struct efi_pixel_bitmask pixel_information;
- u32 pixels_per_scan_line;
-} __packed;
-
-struct efi_graphics_output_protocol_mode_32 {
- u32 max_mode;
- u32 mode;
- u32 info;
- u32 size_of_info;
- u64 frame_buffer_base;
- u32 frame_buffer_size;
-} __packed;
-
-struct efi_graphics_output_protocol_mode_64 {
- u32 max_mode;
- u32 mode;
- u64 info;
- u64 size_of_info;
- u64 frame_buffer_base;
- u64 frame_buffer_size;
-} __packed;
-
-struct efi_graphics_output_protocol_mode {
- u32 max_mode;
- u32 mode;
- unsigned long info;
- unsigned long size_of_info;
- u64 frame_buffer_base;
- unsigned long frame_buffer_size;
-} __packed;
-
-struct efi_graphics_output_protocol_32 {
- u32 query_mode;
- u32 set_mode;
- u32 blt;
- u32 mode;
-};
-
-struct efi_graphics_output_protocol_64 {
- u64 query_mode;
- u64 set_mode;
- u64 blt;
- u64 mode;
-};
-
-struct efi_graphics_output_protocol {
- void *query_mode;
- unsigned long set_mode;
- unsigned long blt;
- struct efi_graphics_output_protocol_mode *mode;
-};
-
struct efi_uga_draw_protocol_32 {
u32 get_mode;
u32 set_mode;
#include <asm/fpu/api.h>
#include <asm/pgtable.h>
+#include <asm/processor-flags.h>
#include <asm/tlb.h>
/*
#define MAX_CMDLINE_ADDRESS UINT_MAX
-#ifdef CONFIG_X86_32
+#define ARCH_EFI_IRQ_FLAGS_MASK X86_EFLAGS_IF
+#ifdef CONFIG_X86_32
extern unsigned long asmlinkage efi_call_phys(void *, ...);
+#define arch_efi_call_virt_setup() kernel_fpu_begin()
+#define arch_efi_call_virt_teardown() kernel_fpu_end()
+
/*
* Wrap all the virtual calls in a way that forces the parameters on the stack.
*/
-
-/* Use this macro if your virtual returns a non-void value */
-#define efi_call_virt(f, args...) \
+#define arch_efi_call_virt(f, args...) \
({ \
- efi_status_t __s; \
- kernel_fpu_begin(); \
- __s = ((efi_##f##_t __attribute__((regparm(0)))*) \
- efi.systab->runtime->f)(args); \
- kernel_fpu_end(); \
- __s; \
-})
-
-/* Use this macro if your virtual call does not return any value */
-#define __efi_call_virt(f, args...) \
-({ \
- kernel_fpu_begin(); \
((efi_##f##_t __attribute__((regparm(0)))*) \
efi.systab->runtime->f)(args); \
- kernel_fpu_end(); \
})
#define efi_ioremap(addr, size, type, attr) ioremap_cache(addr, size)
u64 phys_stack;
} __packed;
-#define efi_call_virt(f, ...) \
+#define arch_efi_call_virt_setup() \
({ \
- efi_status_t __s; \
- \
efi_sync_low_kernel_mappings(); \
preempt_disable(); \
__kernel_fpu_begin(); \
write_cr3((unsigned long)efi_scratch.efi_pgt); \
__flush_tlb_all(); \
} \
- \
- __s = efi_call((void *)efi.systab->runtime->f, __VA_ARGS__); \
- \
+})
+
+#define arch_efi_call_virt(f, args...) \
+ efi_call((void *)efi.systab->runtime->f, args) \
+
+#define arch_efi_call_virt_teardown() \
+({ \
if (efi_scratch.use_pgd) { \
write_cr3(efi_scratch.prev_cr3); \
__flush_tlb_all(); \
\
__kernel_fpu_end(); \
preempt_enable(); \
- __s; \
})
-/*
- * All X86_64 virt calls return non-void values. Thus, use non-void call for
- * virt calls that would be void on X86_32.
- */
-#define __efi_call_virt(f, args...) efi_call_virt(f, args)
-
extern void __iomem *__init efi_ioremap(unsigned long addr, unsigned long size,
u32 type, u64 attribute);
extern struct console early_efi_console;
extern void parse_efi_setup(u64 phys_addr, u32 data_len);
+extern void efifb_setup_from_dmi(struct screen_info *si, const char *opt);
+
#ifdef CONFIG_EFI_MIXED
extern void efi_thunk_runtime_setup(void);
extern efi_status_t efi_thunk_set_virtual_address_map(
#define efi_call_early(f, ...) \
__efi_early()->call(__efi_early()->f, __VA_ARGS__);
+#define __efi_call_early(f, ...) \
+ __efi_early()->call((unsigned long)f, __VA_ARGS__);
+
+#define efi_is_64bit() __efi_early()->is64
+
extern bool efi_reboot_required(void);
#else
mode = reboot_mode == REBOOT_WARM ? 0x1234 : 0;
*((unsigned short *)__va(0x472)) = mode;
+ /*
+ * If an EFI capsule has been registered with the firmware then
+ * override the reboot= parameter.
+ */
+ if (efi_capsule_pending(NULL)) {
+ pr_info("EFI capsule is pending, forcing EFI reboot.\n");
+ reboot_type = BOOT_EFI;
+ }
+
for (;;) {
/* Could also try the reset bit in the Hammer NB */
switch (reboot_type) {
[M_UNKNOWN] = { NULL, 0, 0, 0, 0, OVERRIDE_NONE }
};
+void efifb_setup_from_dmi(struct screen_info *si, const char *opt)
+{
+ int i;
+
+ for (i = 0; i < M_UNKNOWN; i++) {
+ if (efifb_dmi_list[i].base != 0 &&
+ !strcmp(opt, efifb_dmi_list[i].optname)) {
+ si->lfb_base = efifb_dmi_list[i].base;
+ si->lfb_linelength = efifb_dmi_list[i].stride;
+ si->lfb_width = efifb_dmi_list[i].width;
+ si->lfb_height = efifb_dmi_list[i].height;
+ }
+ }
+}
+
#define choose_value(dmivalue, fwvalue, field, flags) ({ \
typeof(fwvalue) _ret_ = fwvalue; \
if ((flags) & (field)) \
static int __cpa_process_fault(struct cpa_data *cpa, unsigned long vaddr,
int primary)
{
- if (cpa->pgd)
+ if (cpa->pgd) {
+ /*
+ * Right now, we only execute this code path when mapping
+ * the EFI virtual memory map regions, no other users
+ * provide a ->pgd value. This may change in the future.
+ */
return populate_pgd(cpa, vaddr);
+ }
/*
* Ignore all non primary paths.
#include <asm/rtc.h>
#include <asm/uv/uv.h>
-#define EFI_DEBUG
-
-struct efi_memory_map memmap;
-
static struct efi efi_phys __initdata;
static efi_system_table_t efi_systab __initdata;
void __init efi_find_mirror(void)
{
- void *p;
+ efi_memory_desc_t *md;
u64 mirror_size = 0, total_size = 0;
- for (p = memmap.map; p < memmap.map_end; p += memmap.desc_size) {
- efi_memory_desc_t *md = p;
+ for_each_efi_memory_desc(md) {
unsigned long long start = md->phys_addr;
unsigned long long size = md->num_pages << EFI_PAGE_SHIFT;
static void __init do_add_efi_memmap(void)
{
- void *p;
+ efi_memory_desc_t *md;
- for (p = memmap.map; p < memmap.map_end; p += memmap.desc_size) {
- efi_memory_desc_t *md = p;
+ for_each_efi_memory_desc(md) {
unsigned long long start = md->phys_addr;
unsigned long long size = md->num_pages << EFI_PAGE_SHIFT;
int e820_type;
#else
pmap = (e->efi_memmap | ((__u64)e->efi_memmap_hi << 32));
#endif
- memmap.phys_map = pmap;
- memmap.nr_map = e->efi_memmap_size /
+ efi.memmap.phys_map = pmap;
+ efi.memmap.nr_map = e->efi_memmap_size /
e->efi_memdesc_size;
- memmap.desc_size = e->efi_memdesc_size;
- memmap.desc_version = e->efi_memdesc_version;
+ efi.memmap.desc_size = e->efi_memdesc_size;
+ efi.memmap.desc_version = e->efi_memdesc_version;
- memblock_reserve(pmap, memmap.nr_map * memmap.desc_size);
+ WARN(efi.memmap.desc_version != 1,
+ "Unexpected EFI_MEMORY_DESCRIPTOR version %ld",
+ efi.memmap.desc_version);
- efi.memmap = &memmap;
+ memblock_reserve(pmap, efi.memmap.nr_map * efi.memmap.desc_size);
return 0;
}
void __init efi_print_memmap(void)
{
-#ifdef EFI_DEBUG
efi_memory_desc_t *md;
- void *p;
- int i;
+ int i = 0;
- for (p = memmap.map, i = 0;
- p < memmap.map_end;
- p += memmap.desc_size, i++) {
+ for_each_efi_memory_desc(md) {
char buf[64];
- md = p;
pr_info("mem%02u: %s range=[0x%016llx-0x%016llx] (%lluMB)\n",
- i, efi_md_typeattr_format(buf, sizeof(buf), md),
+ i++, efi_md_typeattr_format(buf, sizeof(buf), md),
md->phys_addr,
md->phys_addr + (md->num_pages << EFI_PAGE_SHIFT) - 1,
(md->num_pages >> (20 - EFI_PAGE_SHIFT)));
}
-#endif /* EFI_DEBUG */
}
void __init efi_unmap_memmap(void)
{
+ unsigned long size;
+
clear_bit(EFI_MEMMAP, &efi.flags);
- if (memmap.map) {
- early_memunmap(memmap.map, memmap.nr_map * memmap.desc_size);
- memmap.map = NULL;
+
+ size = efi.memmap.nr_map * efi.memmap.desc_size;
+ if (efi.memmap.map) {
+ early_memunmap(efi.memmap.map, size);
+ efi.memmap.map = NULL;
}
}
efi.systab->hdr.revision >> 16,
efi.systab->hdr.revision & 0xffff);
- set_bit(EFI_SYSTEM_TABLES, &efi.flags);
-
return 0;
}
static int __init efi_memmap_init(void)
{
+ unsigned long addr, size;
+
if (efi_enabled(EFI_PARAVIRT))
return 0;
/* Map the EFI memory map */
- memmap.map = early_memremap((unsigned long)memmap.phys_map,
- memmap.nr_map * memmap.desc_size);
- if (memmap.map == NULL) {
+ size = efi.memmap.nr_map * efi.memmap.desc_size;
+ addr = (unsigned long)efi.memmap.phys_map;
+
+ efi.memmap.map = early_memremap(addr, size);
+ if (efi.memmap.map == NULL) {
pr_err("Could not map the memory map!\n");
return -ENOMEM;
}
- memmap.map_end = memmap.map + (memmap.nr_map * memmap.desc_size);
+
+ efi.memmap.map_end = efi.memmap.map + size;
if (add_efi_memmap)
do_add_efi_memmap();
void __init runtime_code_page_mkexec(void)
{
efi_memory_desc_t *md;
- void *p;
/* Make EFI runtime service code area executable */
- for (p = memmap.map; p < memmap.map_end; p += memmap.desc_size) {
- md = p;
-
+ for_each_efi_memory_desc(md) {
if (md->type != EFI_RUNTIME_SERVICES_CODE)
continue;
/* Merge contiguous regions of the same type and attribute */
static void __init efi_merge_regions(void)
{
- void *p;
efi_memory_desc_t *md, *prev_md = NULL;
- for (p = memmap.map; p < memmap.map_end; p += memmap.desc_size) {
+ for_each_efi_memory_desc(md) {
u64 prev_size;
- md = p;
if (!prev_md) {
prev_md = md;
static void __init save_runtime_map(void)
{
#ifdef CONFIG_KEXEC_CORE
+ unsigned long desc_size;
efi_memory_desc_t *md;
- void *tmp, *p, *q = NULL;
+ void *tmp, *q = NULL;
int count = 0;
if (efi_enabled(EFI_OLD_MEMMAP))
return;
- for (p = memmap.map; p < memmap.map_end; p += memmap.desc_size) {
- md = p;
+ desc_size = efi.memmap.desc_size;
+ for_each_efi_memory_desc(md) {
if (!(md->attribute & EFI_MEMORY_RUNTIME) ||
(md->type == EFI_BOOT_SERVICES_CODE) ||
(md->type == EFI_BOOT_SERVICES_DATA))
continue;
- tmp = krealloc(q, (count + 1) * memmap.desc_size, GFP_KERNEL);
+ tmp = krealloc(q, (count + 1) * desc_size, GFP_KERNEL);
if (!tmp)
goto out;
q = tmp;
- memcpy(q + count * memmap.desc_size, md, memmap.desc_size);
+ memcpy(q + count * desc_size, md, desc_size);
count++;
}
- efi_runtime_map_setup(q, count, memmap.desc_size);
+ efi_runtime_map_setup(q, count, desc_size);
return;
out:
{
/* Initial call */
if (!entry)
- return memmap.map_end - memmap.desc_size;
+ return efi.memmap.map_end - efi.memmap.desc_size;
- entry -= memmap.desc_size;
- if (entry < memmap.map)
+ entry -= efi.memmap.desc_size;
+ if (entry < efi.memmap.map)
return NULL;
return entry;
/* Initial call */
if (!entry)
- return memmap.map;
+ return efi.memmap.map;
- entry += memmap.desc_size;
- if (entry >= memmap.map_end)
+ entry += efi.memmap.desc_size;
+ if (entry >= efi.memmap.map_end)
return NULL;
return entry;
{
void *p, *new_memmap = NULL;
unsigned long left = 0;
+ unsigned long desc_size;
efi_memory_desc_t *md;
+ desc_size = efi.memmap.desc_size;
+
p = NULL;
while ((p = efi_map_next_entry(p))) {
md = p;
efi_map_region(md);
get_systab_virt_addr(md);
- if (left < memmap.desc_size) {
+ if (left < desc_size) {
new_memmap = realloc_pages(new_memmap, *pg_shift);
if (!new_memmap)
return NULL;
(*pg_shift)++;
}
- memcpy(new_memmap + (*count * memmap.desc_size), md,
- memmap.desc_size);
+ memcpy(new_memmap + (*count * desc_size), md, desc_size);
- left -= memmap.desc_size;
+ left -= desc_size;
(*count)++;
}
#ifdef CONFIG_KEXEC_CORE
efi_memory_desc_t *md;
unsigned int num_pages;
- void *p;
efi.systab = NULL;
* Map efi regions which were passed via setup_data. The virt_addr is a
* fixed addr which was used in first kernel of a kexec boot.
*/
- for (p = memmap.map; p < memmap.map_end; p += memmap.desc_size) {
- md = p;
+ for_each_efi_memory_desc(md) {
efi_map_region_fixed(md); /* FIXME: add error handling */
get_systab_virt_addr(md);
}
BUG_ON(!efi.systab);
- num_pages = ALIGN(memmap.nr_map * memmap.desc_size, PAGE_SIZE);
+ num_pages = ALIGN(efi.memmap.nr_map * efi.memmap.desc_size, PAGE_SIZE);
num_pages >>= PAGE_SHIFT;
- if (efi_setup_page_tables(memmap.phys_map, num_pages)) {
+ if (efi_setup_page_tables(efi.memmap.phys_map, num_pages)) {
clear_bit(EFI_RUNTIME_SERVICES, &efi.flags);
return;
}
if (efi_is_native()) {
status = phys_efi_set_virtual_address_map(
- memmap.desc_size * count,
- memmap.desc_size,
- memmap.desc_version,
+ efi.memmap.desc_size * count,
+ efi.memmap.desc_size,
+ efi.memmap.desc_version,
(efi_memory_desc_t *)__pa(new_memmap));
} else {
status = efi_thunk_set_virtual_address_map(
efi_phys.set_virtual_address_map,
- memmap.desc_size * count,
- memmap.desc_size,
- memmap.desc_version,
+ efi.memmap.desc_size * count,
+ efi.memmap.desc_size,
+ efi.memmap.desc_version,
(efi_memory_desc_t *)__pa(new_memmap));
}
u32 efi_mem_type(unsigned long phys_addr)
{
efi_memory_desc_t *md;
- void *p;
if (!efi_enabled(EFI_MEMMAP))
return 0;
- for (p = memmap.map; p < memmap.map_end; p += memmap.desc_size) {
- md = p;
+ for_each_efi_memory_desc(md) {
if ((md->phys_addr <= phys_addr) &&
(phys_addr < (md->phys_addr +
(md->num_pages << EFI_PAGE_SHIFT))))
static void __init early_code_mapping_set_exec(int executable)
{
efi_memory_desc_t *md;
- void *p;
if (!(__supported_pte_mask & _PAGE_NX))
return;
/* Make EFI service code area executable */
- for (p = memmap.map; p < memmap.map_end; p += memmap.desc_size) {
- md = p;
+ for_each_efi_memory_desc(md) {
if (md->type == EFI_RUNTIME_SERVICES_CODE ||
md->type == EFI_BOOT_SERVICES_CODE)
efi_set_executable(md, executable);
* Map all of RAM so that we can access arguments in the 1:1
* mapping when making EFI runtime calls.
*/
- for_each_efi_memory_desc(&memmap, md) {
+ for_each_efi_memory_desc(md) {
if (md->type != EFI_CONVENTIONAL_MEMORY &&
md->type != EFI_LOADER_DATA &&
md->type != EFI_LOADER_CODE)
unsigned long pfn;
pgd_t *pgd = efi_pgd;
efi_memory_desc_t *md;
- void *p;
if (efi_enabled(EFI_OLD_MEMMAP)) {
if (__supported_pte_mask & _PAGE_NX)
if (!efi_enabled(EFI_NX_PE_DATA))
return;
- for (p = memmap.map; p < memmap.map_end; p += memmap.desc_size) {
+ for_each_efi_memory_desc(md) {
unsigned long pf = 0;
- md = p;
if (!(md->attribute & EFI_MEMORY_RUNTIME))
continue;
*/
void __init efi_reserve_boot_services(void)
{
- void *p;
+ efi_memory_desc_t *md;
- for (p = memmap.map; p < memmap.map_end; p += memmap.desc_size) {
- efi_memory_desc_t *md = p;
+ for_each_efi_memory_desc(md) {
u64 start = md->phys_addr;
u64 size = md->num_pages << EFI_PAGE_SHIFT;
bool already_reserved;
void __init efi_free_boot_services(void)
{
- void *p;
+ efi_memory_desc_t *md;
- for (p = memmap.map; p < memmap.map_end; p += memmap.desc_size) {
- efi_memory_desc_t *md = p;
+ for_each_efi_memory_desc(md) {
unsigned long long start = md->phys_addr;
unsigned long long size = md->num_pages << EFI_PAGE_SHIFT;
config EFI_ARMSTUB
bool
+config EFI_BOOTLOADER_CONTROL
+ tristate "EFI Bootloader Control"
+ depends on EFI_VARS
+ default n
+ ---help---
+ This module installs a reboot hook, such that if reboot() is
+ invoked with a string argument NNN, "NNN" is copied to the
+ "LoaderEntryOneShot" EFI variable, to be read by the
+ bootloader. If the string matches one of the boot labels
+ defined in its configuration, the bootloader will boot once
+ to that label. The "LoaderEntryRebootReason" EFI variable is
+ set with the reboot reason: "reboot" or "shutdown". The
+ bootloader reads this reboot reason and takes particular
+ action according to its policy.
+
+config EFI_CAPSULE_LOADER
+ tristate "EFI capsule loader"
+ depends on EFI
+ help
+ This option exposes a loader interface "/dev/efi_capsule_loader" for
+ users to load EFI capsules. This driver requires working runtime
+ capsule support in the firmware, which many OEMs do not provide.
+
+ Most users should say N.
+
endmenu
config UEFI_CPER
#
KASAN_SANITIZE_runtime-wrappers.o := n
-obj-$(CONFIG_EFI) += efi.o vars.o reboot.o
+obj-$(CONFIG_EFI) += efi.o vars.o reboot.o memattr.o
+obj-$(CONFIG_EFI) += capsule.o
obj-$(CONFIG_EFI_VARS) += efivars.o
obj-$(CONFIG_EFI_ESRT) += esrt.o
obj-$(CONFIG_EFI_VARS_PSTORE) += efi-pstore.o
obj-$(CONFIG_EFI_RUNTIME_WRAPPERS) += runtime-wrappers.o
obj-$(CONFIG_EFI_STUB) += libstub/
obj-$(CONFIG_EFI_FAKE_MEMMAP) += fake_mem.o
+obj-$(CONFIG_EFI_BOOTLOADER_CONTROL) += efibc.o
arm-obj-$(CONFIG_EFI) := arm-init.o arm-runtime.o
obj-$(CONFIG_ARM) += $(arm-obj-y)
obj-$(CONFIG_ARM64) += $(arm-obj-y)
+obj-$(CONFIG_EFI_CAPSULE_LOADER) += capsule-loader.o
*
*/
+#define pr_fmt(fmt) "efi: " fmt
+
#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 <linux/platform_device.h>
+#include <linux/screen_info.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)
{
efi_memory_desc_t *md;
- for_each_efi_memory_desc(&memmap, md) {
+ for_each_efi_memory_desc(md) {
if (!(md->attribute & EFI_MEMORY_RUNTIME))
continue;
if (md->virt_addr == 0)
return addr;
}
+static __initdata unsigned long screen_info_table = EFI_INVALID_TABLE_ADDR;
+
+static __initdata efi_config_table_type_t arch_tables[] = {
+ {LINUX_EFI_ARM_SCREEN_INFO_TABLE_GUID, NULL, &screen_info_table},
+ {NULL_GUID, NULL, NULL}
+};
+
+static void __init init_screen_info(void)
+{
+ struct screen_info *si;
+
+ if (screen_info_table != EFI_INVALID_TABLE_ADDR) {
+ si = early_memremap_ro(screen_info_table, sizeof(*si));
+ if (!si) {
+ pr_err("Could not map screen_info config table\n");
+ return;
+ }
+ screen_info = *si;
+ early_memunmap(si, sizeof(*si));
+
+ /* dummycon on ARM needs non-zero values for columns/lines */
+ screen_info.orig_video_cols = 80;
+ screen_info.orig_video_lines = 25;
+ }
+
+ if (screen_info.orig_video_isVGA == VIDEO_TYPE_EFI &&
+ memblock_is_map_memory(screen_info.lfb_base))
+ memblock_mark_nomap(screen_info.lfb_base, screen_info.lfb_size);
+}
+
static int __init uefi_init(void)
{
efi_char16_t *c16;
efi.systab->hdr.revision >> 16,
efi.systab->hdr.revision & 0xffff);
+ efi.runtime_version = efi.systab->hdr.revision;
+
/* Show what we know for posterity */
c16 = early_memremap_ro(efi_to_phys(efi.systab->fw_vendor),
sizeof(vendor) * sizeof(efi_char16_t));
goto out;
}
retval = efi_config_parse_tables(config_tables, efi.systab->nr_tables,
- sizeof(efi_config_table_t), NULL);
+ sizeof(efi_config_table_t),
+ arch_tables);
early_memunmap(config_tables, table_size);
out:
if (efi_enabled(EFI_DBG))
pr_info("Processing EFI memory map:\n");
- for_each_efi_memory_desc(&memmap, md) {
+ for_each_efi_memory_desc(md) {
paddr = md->phys_addr;
npages = md->num_pages;
efi_system_table = params.system_table;
- memmap.phys_map = params.mmap;
- memmap.map = early_memremap_ro(params.mmap, params.mmap_size);
- if (memmap.map == NULL) {
+ efi.memmap.phys_map = params.mmap;
+ efi.memmap.map = early_memremap_ro(params.mmap, params.mmap_size);
+ if (efi.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
*/
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;
+ efi.memmap.map_end = efi.memmap.map + params.mmap_size;
+ efi.memmap.desc_size = params.desc_size;
+ efi.memmap.desc_version = params.desc_ver;
+
+ WARN(efi.memmap.desc_version != 1,
+ "Unexpected EFI_MEMORY_DESCRIPTOR version %ld",
+ efi.memmap.desc_version);
if (uefi_init() < 0)
return;
reserve_regions();
- early_memunmap(memmap.map, params.mmap_size);
+ efi_memattr_init();
+ early_memunmap(efi.memmap.map, params.mmap_size);
- if (IS_ENABLED(CONFIG_ARM)) {
- /*
- * ARM currently does not allow ioremap_cache() to be called on
- * memory regions that are covered by struct page. So remove the
- * UEFI memory map from the linear mapping.
- */
- memblock_mark_nomap(params.mmap & PAGE_MASK,
- PAGE_ALIGN(params.mmap_size +
- (params.mmap & ~PAGE_MASK)));
- } else {
- memblock_reserve(params.mmap & PAGE_MASK,
- PAGE_ALIGN(params.mmap_size +
- (params.mmap & ~PAGE_MASK)));
- }
+ memblock_reserve(params.mmap & PAGE_MASK,
+ PAGE_ALIGN(params.mmap_size +
+ (params.mmap & ~PAGE_MASK)));
+
+ init_screen_info();
+}
+
+static int __init register_gop_device(void)
+{
+ void *pd;
+
+ if (screen_info.orig_video_isVGA != VIDEO_TYPE_EFI)
+ return 0;
+
+ pd = platform_device_register_data(NULL, "efi-framebuffer", 0,
+ &screen_info, sizeof(screen_info));
+ return PTR_ERR_OR_ZERO(pd);
}
+subsys_initcall(register_gop_device);
static bool __init efi_virtmap_init(void)
{
efi_memory_desc_t *md;
+ bool systab_found;
efi_mm.pgd = pgd_alloc(&efi_mm);
init_new_context(NULL, &efi_mm);
- for_each_efi_memory_desc(&memmap, md) {
+ systab_found = false;
+ for_each_efi_memory_desc(md) {
phys_addr_t phys = md->phys_addr;
int ret;
&phys, ret);
return false;
}
+ /*
+ * If this entry covers the address of the UEFI system table,
+ * calculate and record its virtual address.
+ */
+ if (efi_system_table >= phys &&
+ efi_system_table < phys + (md->num_pages * EFI_PAGE_SIZE)) {
+ efi.systab = (void *)(unsigned long)(efi_system_table -
+ phys + md->virt_addr);
+ systab_found = true;
+ }
+ }
+ if (!systab_found) {
+ pr_err("No virtual mapping found for the UEFI System Table\n");
+ return false;
}
+
+ if (efi_memattr_apply_permissions(&efi_mm, efi_set_mapping_permissions))
+ return false;
+
return true;
}
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;
+ mapsize = efi.memmap.map_end - efi.memmap.map;
- 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");
+ efi.memmap.map = memremap(efi.memmap.phys_map, mapsize, MEMREMAP_WB);
+ if (!efi.memmap.map) {
+ pr_err("Failed to remap EFI memory map\n");
return -ENOMEM;
}
- set_bit(EFI_SYSTEM_TABLES, &efi.flags);
+ efi.memmap.map_end = efi.memmap.map + mapsize;
if (!efi_virtmap_init()) {
- pr_err("No UEFI virtual mapping was installed -- runtime services will not be available\n");
+ pr_err("UEFI virtual mapping missing or invalid -- runtime services will not be available\n");
return -ENOMEM;
}
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);
--- /dev/null
+/*
+ * EFI capsule loader driver.
+ *
+ * Copyright 2015 Intel Corporation
+ *
+ * This file is part of the Linux kernel, and is made available under
+ * the terms of the GNU General Public License version 2.
+ */
+
+#define pr_fmt(fmt) "efi: " fmt
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/miscdevice.h>
+#include <linux/highmem.h>
+#include <linux/slab.h>
+#include <linux/mutex.h>
+#include <linux/efi.h>
+
+#define NO_FURTHER_WRITE_ACTION -1
+
+struct capsule_info {
+ bool header_obtained;
+ int reset_type;
+ long index;
+ size_t count;
+ size_t total_size;
+ struct page **pages;
+ size_t page_bytes_remain;
+};
+
+/**
+ * efi_free_all_buff_pages - free all previous allocated buffer pages
+ * @cap_info: pointer to current instance of capsule_info structure
+ *
+ * In addition to freeing buffer pages, it flags NO_FURTHER_WRITE_ACTION
+ * to cease processing data in subsequent write(2) calls until close(2)
+ * is called.
+ **/
+static void efi_free_all_buff_pages(struct capsule_info *cap_info)
+{
+ while (cap_info->index > 0)
+ __free_page(cap_info->pages[--cap_info->index]);
+
+ cap_info->index = NO_FURTHER_WRITE_ACTION;
+}
+
+/**
+ * efi_capsule_setup_info - obtain the efi capsule header in the binary and
+ * setup capsule_info structure
+ * @cap_info: pointer to current instance of capsule_info structure
+ * @kbuff: a mapped first page buffer pointer
+ * @hdr_bytes: the total received number of bytes for efi header
+ **/
+static ssize_t efi_capsule_setup_info(struct capsule_info *cap_info,
+ void *kbuff, size_t hdr_bytes)
+{
+ efi_capsule_header_t *cap_hdr;
+ size_t pages_needed;
+ int ret;
+ void *temp_page;
+
+ /* Only process data block that is larger than efi header size */
+ if (hdr_bytes < sizeof(efi_capsule_header_t))
+ return 0;
+
+ /* Reset back to the correct offset of header */
+ cap_hdr = kbuff - cap_info->count;
+ pages_needed = ALIGN(cap_hdr->imagesize, PAGE_SIZE) >> PAGE_SHIFT;
+
+ if (pages_needed == 0) {
+ pr_err("%s: pages count invalid\n", __func__);
+ return -EINVAL;
+ }
+
+ /* Check if the capsule binary supported */
+ ret = efi_capsule_supported(cap_hdr->guid, cap_hdr->flags,
+ cap_hdr->imagesize,
+ &cap_info->reset_type);
+ if (ret) {
+ pr_err("%s: efi_capsule_supported() failed\n",
+ __func__);
+ return ret;
+ }
+
+ cap_info->total_size = cap_hdr->imagesize;
+ temp_page = krealloc(cap_info->pages,
+ pages_needed * sizeof(void *),
+ GFP_KERNEL | __GFP_ZERO);
+ if (!temp_page) {
+ pr_debug("%s: krealloc() failed\n", __func__);
+ return -ENOMEM;
+ }
+
+ cap_info->pages = temp_page;
+ cap_info->header_obtained = true;
+
+ return 0;
+}
+
+/**
+ * efi_capsule_submit_update - invoke the efi_capsule_update API once binary
+ * upload done
+ * @cap_info: pointer to current instance of capsule_info structure
+ **/
+static ssize_t efi_capsule_submit_update(struct capsule_info *cap_info)
+{
+ int ret;
+ void *cap_hdr_temp;
+
+ cap_hdr_temp = kmap(cap_info->pages[0]);
+ if (!cap_hdr_temp) {
+ pr_debug("%s: kmap() failed\n", __func__);
+ return -EFAULT;
+ }
+
+ ret = efi_capsule_update(cap_hdr_temp, cap_info->pages);
+ kunmap(cap_info->pages[0]);
+ if (ret) {
+ pr_err("%s: efi_capsule_update() failed\n", __func__);
+ return ret;
+ }
+
+ /* Indicate capsule binary uploading is done */
+ cap_info->index = NO_FURTHER_WRITE_ACTION;
+ pr_info("%s: Successfully upload capsule file with reboot type '%s'\n",
+ __func__, !cap_info->reset_type ? "RESET_COLD" :
+ cap_info->reset_type == 1 ? "RESET_WARM" :
+ "RESET_SHUTDOWN");
+ return 0;
+}
+
+/**
+ * efi_capsule_write - store the capsule binary and pass it to
+ * efi_capsule_update() API
+ * @file: file pointer
+ * @buff: buffer pointer
+ * @count: number of bytes in @buff
+ * @offp: not used
+ *
+ * Expectation:
+ * - A user space tool should start at the beginning of capsule binary and
+ * pass data in sequentially.
+ * - Users should close and re-open this file note in order to upload more
+ * capsules.
+ * - After an error returned, user should close the file and restart the
+ * operation for the next try otherwise -EIO will be returned until the
+ * file is closed.
+ * - An EFI capsule header must be located at the beginning of capsule
+ * binary file and passed in as first block data of write operation.
+ **/
+static ssize_t efi_capsule_write(struct file *file, const char __user *buff,
+ size_t count, loff_t *offp)
+{
+ int ret = 0;
+ struct capsule_info *cap_info = file->private_data;
+ struct page *page;
+ void *kbuff = NULL;
+ size_t write_byte;
+
+ if (count == 0)
+ return 0;
+
+ /* Return error while NO_FURTHER_WRITE_ACTION is flagged */
+ if (cap_info->index < 0)
+ return -EIO;
+
+ /* Only alloc a new page when previous page is full */
+ if (!cap_info->page_bytes_remain) {
+ page = alloc_page(GFP_KERNEL);
+ if (!page) {
+ pr_debug("%s: alloc_page() failed\n", __func__);
+ ret = -ENOMEM;
+ goto failed;
+ }
+
+ cap_info->pages[cap_info->index++] = page;
+ cap_info->page_bytes_remain = PAGE_SIZE;
+ }
+
+ page = cap_info->pages[cap_info->index - 1];
+
+ kbuff = kmap(page);
+ if (!kbuff) {
+ pr_debug("%s: kmap() failed\n", __func__);
+ ret = -EFAULT;
+ goto failed;
+ }
+ kbuff += PAGE_SIZE - cap_info->page_bytes_remain;
+
+ /* Copy capsule binary data from user space to kernel space buffer */
+ write_byte = min_t(size_t, count, cap_info->page_bytes_remain);
+ if (copy_from_user(kbuff, buff, write_byte)) {
+ pr_debug("%s: copy_from_user() failed\n", __func__);
+ ret = -EFAULT;
+ goto fail_unmap;
+ }
+ cap_info->page_bytes_remain -= write_byte;
+
+ /* Setup capsule binary info structure */
+ if (!cap_info->header_obtained) {
+ ret = efi_capsule_setup_info(cap_info, kbuff,
+ cap_info->count + write_byte);
+ if (ret)
+ goto fail_unmap;
+ }
+
+ cap_info->count += write_byte;
+ kunmap(page);
+
+ /* Submit the full binary to efi_capsule_update() API */
+ if (cap_info->header_obtained &&
+ cap_info->count >= cap_info->total_size) {
+ if (cap_info->count > cap_info->total_size) {
+ pr_err("%s: upload size exceeded header defined size\n",
+ __func__);
+ ret = -EINVAL;
+ goto failed;
+ }
+
+ ret = efi_capsule_submit_update(cap_info);
+ if (ret)
+ goto failed;
+ }
+
+ return write_byte;
+
+fail_unmap:
+ kunmap(page);
+failed:
+ efi_free_all_buff_pages(cap_info);
+ return ret;
+}
+
+/**
+ * efi_capsule_flush - called by file close or file flush
+ * @file: file pointer
+ * @id: not used
+ *
+ * If a capsule is being partially uploaded then calling this function
+ * will be treated as upload termination and will free those completed
+ * buffer pages and -ECANCELED will be returned.
+ **/
+static int efi_capsule_flush(struct file *file, fl_owner_t id)
+{
+ int ret = 0;
+ struct capsule_info *cap_info = file->private_data;
+
+ if (cap_info->index > 0) {
+ pr_err("%s: capsule upload not complete\n", __func__);
+ efi_free_all_buff_pages(cap_info);
+ ret = -ECANCELED;
+ }
+
+ return ret;
+}
+
+/**
+ * efi_capsule_release - called by file close
+ * @inode: not used
+ * @file: file pointer
+ *
+ * We will not free successfully submitted pages since efi update
+ * requires data to be maintained across system reboot.
+ **/
+static int efi_capsule_release(struct inode *inode, struct file *file)
+{
+ struct capsule_info *cap_info = file->private_data;
+
+ kfree(cap_info->pages);
+ kfree(file->private_data);
+ file->private_data = NULL;
+ return 0;
+}
+
+/**
+ * efi_capsule_open - called by file open
+ * @inode: not used
+ * @file: file pointer
+ *
+ * Will allocate each capsule_info memory for each file open call.
+ * This provided the capability to support multiple file open feature
+ * where user is not needed to wait for others to finish in order to
+ * upload their capsule binary.
+ **/
+static int efi_capsule_open(struct inode *inode, struct file *file)
+{
+ struct capsule_info *cap_info;
+
+ cap_info = kzalloc(sizeof(*cap_info), GFP_KERNEL);
+ if (!cap_info)
+ return -ENOMEM;
+
+ cap_info->pages = kzalloc(sizeof(void *), GFP_KERNEL);
+ if (!cap_info->pages) {
+ kfree(cap_info);
+ return -ENOMEM;
+ }
+
+ file->private_data = cap_info;
+
+ return 0;
+}
+
+static const struct file_operations efi_capsule_fops = {
+ .owner = THIS_MODULE,
+ .open = efi_capsule_open,
+ .write = efi_capsule_write,
+ .flush = efi_capsule_flush,
+ .release = efi_capsule_release,
+ .llseek = no_llseek,
+};
+
+static struct miscdevice efi_capsule_misc = {
+ .minor = MISC_DYNAMIC_MINOR,
+ .name = "efi_capsule_loader",
+ .fops = &efi_capsule_fops,
+};
+
+static int __init efi_capsule_loader_init(void)
+{
+ int ret;
+
+ if (!efi_enabled(EFI_RUNTIME_SERVICES))
+ return -ENODEV;
+
+ ret = misc_register(&efi_capsule_misc);
+ if (ret)
+ pr_err("%s: Failed to register misc char file note\n",
+ __func__);
+
+ return ret;
+}
+module_init(efi_capsule_loader_init);
+
+static void __exit efi_capsule_loader_exit(void)
+{
+ misc_deregister(&efi_capsule_misc);
+}
+module_exit(efi_capsule_loader_exit);
+
+MODULE_DESCRIPTION("EFI capsule firmware binary loader");
+MODULE_LICENSE("GPL v2");
--- /dev/null
+/*
+ * EFI capsule support.
+ *
+ * Copyright 2013 Intel Corporation; author Matt Fleming
+ *
+ * This file is part of the Linux kernel, and is made available under
+ * the terms of the GNU General Public License version 2.
+ */
+
+#define pr_fmt(fmt) "efi: " fmt
+
+#include <linux/slab.h>
+#include <linux/mutex.h>
+#include <linux/highmem.h>
+#include <linux/efi.h>
+#include <linux/vmalloc.h>
+#include <asm/io.h>
+
+typedef struct {
+ u64 length;
+ u64 data;
+} efi_capsule_block_desc_t;
+
+static bool capsule_pending;
+static bool stop_capsules;
+static int efi_reset_type = -1;
+
+/*
+ * capsule_mutex serialises access to both capsule_pending and
+ * efi_reset_type and stop_capsules.
+ */
+static DEFINE_MUTEX(capsule_mutex);
+
+/**
+ * efi_capsule_pending - has a capsule been passed to the firmware?
+ * @reset_type: store the type of EFI reset if capsule is pending
+ *
+ * To ensure that the registered capsule is processed correctly by the
+ * firmware we need to perform a specific type of reset. If a capsule is
+ * pending return the reset type in @reset_type.
+ *
+ * This function will race with callers of efi_capsule_update(), for
+ * example, calling this function while somebody else is in
+ * efi_capsule_update() but hasn't reached efi_capsue_update_locked()
+ * will miss the updates to capsule_pending and efi_reset_type after
+ * efi_capsule_update_locked() completes.
+ *
+ * A non-racy use is from platform reboot code because we use
+ * system_state to ensure no capsules can be sent to the firmware once
+ * we're at SYSTEM_RESTART. See efi_capsule_update_locked().
+ */
+bool efi_capsule_pending(int *reset_type)
+{
+ if (!capsule_pending)
+ return false;
+
+ if (reset_type)
+ *reset_type = efi_reset_type;
+
+ return true;
+}
+
+/*
+ * Whitelist of EFI capsule flags that we support.
+ *
+ * We do not handle EFI_CAPSULE_INITIATE_RESET because that would
+ * require us to prepare the kernel for reboot. Refuse to load any
+ * capsules with that flag and any other flags that we do not know how
+ * to handle.
+ */
+#define EFI_CAPSULE_SUPPORTED_FLAG_MASK \
+ (EFI_CAPSULE_PERSIST_ACROSS_RESET | EFI_CAPSULE_POPULATE_SYSTEM_TABLE)
+
+/**
+ * efi_capsule_supported - does the firmware support the capsule?
+ * @guid: vendor guid of capsule
+ * @flags: capsule flags
+ * @size: size of capsule data
+ * @reset: the reset type required for this capsule
+ *
+ * Check whether a capsule with @flags is supported by the firmware
+ * and that @size doesn't exceed the maximum size for a capsule.
+ *
+ * No attempt is made to check @reset against the reset type required
+ * by any pending capsules because of the races involved.
+ */
+int efi_capsule_supported(efi_guid_t guid, u32 flags, size_t size, int *reset)
+{
+ efi_capsule_header_t capsule;
+ efi_capsule_header_t *cap_list[] = { &capsule };
+ efi_status_t status;
+ u64 max_size;
+
+ if (flags & ~EFI_CAPSULE_SUPPORTED_FLAG_MASK)
+ return -EINVAL;
+
+ capsule.headersize = capsule.imagesize = sizeof(capsule);
+ memcpy(&capsule.guid, &guid, sizeof(efi_guid_t));
+ capsule.flags = flags;
+
+ status = efi.query_capsule_caps(cap_list, 1, &max_size, reset);
+ if (status != EFI_SUCCESS)
+ return efi_status_to_err(status);
+
+ if (size > max_size)
+ return -ENOSPC;
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(efi_capsule_supported);
+
+/*
+ * Every scatter gather list (block descriptor) page must end with a
+ * continuation pointer. The last continuation pointer of the last
+ * page must be zero to mark the end of the chain.
+ */
+#define SGLIST_PER_PAGE ((PAGE_SIZE / sizeof(efi_capsule_block_desc_t)) - 1)
+
+/*
+ * How many scatter gather list (block descriptor) pages do we need
+ * to map @count pages?
+ */
+static inline unsigned int sg_pages_num(unsigned int count)
+{
+ return DIV_ROUND_UP(count, SGLIST_PER_PAGE);
+}
+
+/**
+ * efi_capsule_update_locked - pass a single capsule to the firmware
+ * @capsule: capsule to send to the firmware
+ * @sg_pages: array of scatter gather (block descriptor) pages
+ * @reset: the reset type required for @capsule
+ *
+ * Since this function must be called under capsule_mutex check
+ * whether efi_reset_type will conflict with @reset, and atomically
+ * set it and capsule_pending if a capsule was successfully sent to
+ * the firmware.
+ *
+ * We also check to see if the system is about to restart, and if so,
+ * abort. This avoids races between efi_capsule_update() and
+ * efi_capsule_pending().
+ */
+static int
+efi_capsule_update_locked(efi_capsule_header_t *capsule,
+ struct page **sg_pages, int reset)
+{
+ efi_physical_addr_t sglist_phys;
+ efi_status_t status;
+
+ lockdep_assert_held(&capsule_mutex);
+
+ /*
+ * If someone has already registered a capsule that requires a
+ * different reset type, we're out of luck and must abort.
+ */
+ if (efi_reset_type >= 0 && efi_reset_type != reset) {
+ pr_err("Conflicting capsule reset type %d (%d).\n",
+ reset, efi_reset_type);
+ return -EINVAL;
+ }
+
+ /*
+ * If the system is getting ready to restart it may have
+ * called efi_capsule_pending() to make decisions (such as
+ * whether to force an EFI reboot), and we're racing against
+ * that call. Abort in that case.
+ */
+ if (unlikely(stop_capsules)) {
+ pr_warn("Capsule update raced with reboot, aborting.\n");
+ return -EINVAL;
+ }
+
+ sglist_phys = page_to_phys(sg_pages[0]);
+
+ status = efi.update_capsule(&capsule, 1, sglist_phys);
+ if (status == EFI_SUCCESS) {
+ capsule_pending = true;
+ efi_reset_type = reset;
+ }
+
+ return efi_status_to_err(status);
+}
+
+/**
+ * efi_capsule_update - send a capsule to the firmware
+ * @capsule: capsule to send to firmware
+ * @pages: an array of capsule data pages
+ *
+ * Build a scatter gather list with EFI capsule block descriptors to
+ * map the capsule described by @capsule with its data in @pages and
+ * send it to the firmware via the UpdateCapsule() runtime service.
+ *
+ * @capsule must be a virtual mapping of the first page in @pages
+ * (@pages[0]) in the kernel address space. That is, a
+ * capsule_header_t that describes the entire contents of the capsule
+ * must be at the start of the first data page.
+ *
+ * Even though this function will validate that the firmware supports
+ * the capsule guid, users will likely want to check that
+ * efi_capsule_supported() returns true before calling this function
+ * because it makes it easier to print helpful error messages.
+ *
+ * If the capsule is successfully submitted to the firmware, any
+ * subsequent calls to efi_capsule_pending() will return true. @pages
+ * must not be released or modified if this function returns
+ * successfully.
+ *
+ * Callers must be prepared for this function to fail, which can
+ * happen if we raced with system reboot or if there is already a
+ * pending capsule that has a reset type that conflicts with the one
+ * required by @capsule. Do NOT use efi_capsule_pending() to detect
+ * this conflict since that would be racy. Instead, submit the capsule
+ * to efi_capsule_update() and check the return value.
+ *
+ * Return 0 on success, a converted EFI status code on failure.
+ */
+int efi_capsule_update(efi_capsule_header_t *capsule, struct page **pages)
+{
+ u32 imagesize = capsule->imagesize;
+ efi_guid_t guid = capsule->guid;
+ unsigned int count, sg_count;
+ u32 flags = capsule->flags;
+ struct page **sg_pages;
+ int rv, reset_type;
+ int i, j;
+
+ rv = efi_capsule_supported(guid, flags, imagesize, &reset_type);
+ if (rv)
+ return rv;
+
+ count = DIV_ROUND_UP(imagesize, PAGE_SIZE);
+ sg_count = sg_pages_num(count);
+
+ sg_pages = kzalloc(sg_count * sizeof(*sg_pages), GFP_KERNEL);
+ if (!sg_pages)
+ return -ENOMEM;
+
+ for (i = 0; i < sg_count; i++) {
+ sg_pages[i] = alloc_page(GFP_KERNEL);
+ if (!sg_pages[i]) {
+ rv = -ENOMEM;
+ goto out;
+ }
+ }
+
+ for (i = 0; i < sg_count; i++) {
+ efi_capsule_block_desc_t *sglist;
+
+ sglist = kmap(sg_pages[i]);
+ if (!sglist) {
+ rv = -ENOMEM;
+ goto out;
+ }
+
+ for (j = 0; j < SGLIST_PER_PAGE && count > 0; j++) {
+ u64 sz = min_t(u64, imagesize, PAGE_SIZE);
+
+ sglist[j].length = sz;
+ sglist[j].data = page_to_phys(*pages++);
+
+ imagesize -= sz;
+ count--;
+ }
+
+ /* Continuation pointer */
+ sglist[j].length = 0;
+
+ if (i + 1 == sg_count)
+ sglist[j].data = 0;
+ else
+ sglist[j].data = page_to_phys(sg_pages[i + 1]);
+
+ kunmap(sg_pages[i]);
+ }
+
+ mutex_lock(&capsule_mutex);
+ rv = efi_capsule_update_locked(capsule, sg_pages, reset_type);
+ mutex_unlock(&capsule_mutex);
+
+out:
+ for (i = 0; rv && i < sg_count; i++) {
+ if (sg_pages[i])
+ __free_page(sg_pages[i]);
+ }
+
+ kfree(sg_pages);
+ return rv;
+}
+EXPORT_SYMBOL_GPL(efi_capsule_update);
+
+static int capsule_reboot_notify(struct notifier_block *nb, unsigned long event, void *cmd)
+{
+ mutex_lock(&capsule_mutex);
+ stop_capsules = true;
+ mutex_unlock(&capsule_mutex);
+
+ return NOTIFY_DONE;
+}
+
+static struct notifier_block capsule_reboot_nb = {
+ .notifier_call = capsule_reboot_notify,
+};
+
+static int __init capsule_reboot_register(void)
+{
+ return register_reboot_notifier(&capsule_reboot_nb);
+}
+core_initcall(capsule_reboot_register);
.config_table = EFI_INVALID_TABLE_ADDR,
.esrt = EFI_INVALID_TABLE_ADDR,
.properties_table = EFI_INVALID_TABLE_ADDR,
+ .mem_attr_table = EFI_INVALID_TABLE_ADDR,
};
EXPORT_SYMBOL(efi);
*/
int __init efi_mem_desc_lookup(u64 phys_addr, efi_memory_desc_t *out_md)
{
- struct efi_memory_map *map = efi.memmap;
+ struct efi_memory_map *map = &efi.memmap;
phys_addr_t p, e;
if (!efi_enabled(EFI_MEMMAP)) {
{UGA_IO_PROTOCOL_GUID, "UGA", &efi.uga},
{EFI_SYSTEM_RESOURCE_TABLE_GUID, "ESRT", &efi.esrt},
{EFI_PROPERTIES_TABLE_GUID, "PROP", &efi.properties_table},
+ {EFI_MEMORY_ATTRIBUTES_TABLE_GUID, "MEMATTR", &efi.mem_attr_table},
{NULL_GUID, NULL, NULL},
};
for (i = 0; efi_guidcmp(table_types[i].guid, NULL_GUID); i++) {
if (!efi_guidcmp(*guid, table_types[i].guid)) {
*(table_types[i].ptr) = table;
- pr_cont(" %s=0x%lx ",
- table_types[i].name, table);
+ if (table_types[i].name)
+ pr_cont(" %s=0x%lx ",
+ table_types[i].name, table);
return 1;
}
}
*/
u64 __weak efi_mem_attributes(unsigned long phys_addr)
{
- struct efi_memory_map *map;
efi_memory_desc_t *md;
- void *p;
if (!efi_enabled(EFI_MEMMAP))
return 0;
- map = efi.memmap;
- for (p = map->map; p < map->map_end; p += map->desc_size) {
- md = p;
+ for_each_efi_memory_desc(md) {
if ((md->phys_addr <= phys_addr) &&
(phys_addr < (md->phys_addr +
(md->num_pages << EFI_PAGE_SHIFT))))
}
return 0;
}
+
+int efi_status_to_err(efi_status_t status)
+{
+ int err;
+
+ switch (status) {
+ case EFI_SUCCESS:
+ err = 0;
+ break;
+ case EFI_INVALID_PARAMETER:
+ err = -EINVAL;
+ break;
+ case EFI_OUT_OF_RESOURCES:
+ err = -ENOSPC;
+ break;
+ case EFI_DEVICE_ERROR:
+ err = -EIO;
+ break;
+ case EFI_WRITE_PROTECTED:
+ err = -EROFS;
+ break;
+ case EFI_SECURITY_VIOLATION:
+ err = -EACCES;
+ break;
+ case EFI_NOT_FOUND:
+ err = -ENOENT;
+ break;
+ default:
+ err = -EINVAL;
+ }
+
+ return err;
+}
--- /dev/null
+/*
+ * efibc: control EFI bootloaders which obey LoaderEntryOneShot var
+ * Copyright (c) 2013-2016, Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ */
+
+#define pr_fmt(fmt) "efibc: " fmt
+
+#include <linux/efi.h>
+#include <linux/module.h>
+#include <linux/reboot.h>
+#include <linux/slab.h>
+
+static void efibc_str_to_str16(const char *str, efi_char16_t *str16)
+{
+ size_t i;
+
+ for (i = 0; i < strlen(str); i++)
+ str16[i] = str[i];
+
+ str16[i] = '\0';
+}
+
+static int efibc_set_variable(const char *name, const char *value)
+{
+ int ret;
+ efi_guid_t guid = LINUX_EFI_LOADER_ENTRY_GUID;
+ struct efivar_entry *entry;
+ size_t size = (strlen(value) + 1) * sizeof(efi_char16_t);
+
+ if (size > sizeof(entry->var.Data)) {
+ pr_err("value is too large");
+ return -EINVAL;
+ }
+
+ entry = kmalloc(sizeof(*entry), GFP_KERNEL);
+ if (!entry) {
+ pr_err("failed to allocate efivar entry");
+ return -ENOMEM;
+ }
+
+ efibc_str_to_str16(name, entry->var.VariableName);
+ efibc_str_to_str16(value, (efi_char16_t *)entry->var.Data);
+ memcpy(&entry->var.VendorGuid, &guid, sizeof(guid));
+
+ ret = efivar_entry_set(entry,
+ EFI_VARIABLE_NON_VOLATILE
+ | EFI_VARIABLE_BOOTSERVICE_ACCESS
+ | EFI_VARIABLE_RUNTIME_ACCESS,
+ size, entry->var.Data, NULL);
+ if (ret)
+ pr_err("failed to set %s EFI variable: 0x%x\n",
+ name, ret);
+
+ kfree(entry);
+ return ret;
+}
+
+static int efibc_reboot_notifier_call(struct notifier_block *notifier,
+ unsigned long event, void *data)
+{
+ const char *reason = "shutdown";
+ int ret;
+
+ if (event == SYS_RESTART)
+ reason = "reboot";
+
+ ret = efibc_set_variable("LoaderEntryRebootReason", reason);
+ if (ret || !data)
+ return NOTIFY_DONE;
+
+ efibc_set_variable("LoaderEntryOneShot", (char *)data);
+
+ return NOTIFY_DONE;
+}
+
+static struct notifier_block efibc_reboot_notifier = {
+ .notifier_call = efibc_reboot_notifier_call,
+};
+
+static int __init efibc_init(void)
+{
+ int ret;
+
+ if (!efi_enabled(EFI_RUNTIME_SERVICES))
+ return -ENODEV;
+
+ ret = register_reboot_notifier(&efibc_reboot_notifier);
+ if (ret)
+ pr_err("unable to register reboot notifier\n");
+
+ return ret;
+}
+module_init(efibc_init);
+
+static void __exit efibc_exit(void)
+{
+ unregister_reboot_notifier(&efibc_reboot_notifier);
+}
+module_exit(efibc_exit);
+
+MODULE_AUTHOR("Jeremy Compostella <jeremy.compostella@intel.com>");
+MODULE_AUTHOR("Matt Gumbel <matthew.k.gumbel@intel.com");
+MODULE_DESCRIPTION("EFI Bootloader Control");
+MODULE_LICENSE("GPL v2");
return;
err = efivar_init(efivar_update_sysfs_entry, entry,
- true, false, &efivar_sysfs_list);
+ false, &efivar_sysfs_list);
if (!err)
break;
return -ENOMEM;
}
- efivar_init(efivars_sysfs_callback, NULL, false,
- true, &efivar_sysfs_list);
+ efivar_init(efivars_sysfs_callback, NULL, true, &efivar_sysfs_list);
error = create_efivars_bin_attributes();
if (error) {
void __init efi_fake_memmap(void)
{
u64 start, end, m_start, m_end, m_attr;
- int new_nr_map = memmap.nr_map;
+ int new_nr_map = efi.memmap.nr_map;
efi_memory_desc_t *md;
phys_addr_t new_memmap_phy;
void *new_memmap;
return;
/* count up the number of EFI memory descriptor */
- for (old = memmap.map; old < memmap.map_end; old += memmap.desc_size) {
- md = old;
+ for_each_efi_memory_desc(md) {
start = md->phys_addr;
end = start + (md->num_pages << EFI_PAGE_SHIFT) - 1;
}
/* allocate memory for new EFI memmap */
- new_memmap_phy = memblock_alloc(memmap.desc_size * new_nr_map,
+ new_memmap_phy = memblock_alloc(efi.memmap.desc_size * new_nr_map,
PAGE_SIZE);
if (!new_memmap_phy)
return;
/* create new EFI memmap */
new_memmap = early_memremap(new_memmap_phy,
- memmap.desc_size * new_nr_map);
+ efi.memmap.desc_size * new_nr_map);
if (!new_memmap) {
- memblock_free(new_memmap_phy, memmap.desc_size * new_nr_map);
+ memblock_free(new_memmap_phy, efi.memmap.desc_size * new_nr_map);
return;
}
- for (old = memmap.map, new = new_memmap;
- old < memmap.map_end;
- old += memmap.desc_size, new += memmap.desc_size) {
+ for (old = efi.memmap.map, new = new_memmap;
+ old < efi.memmap.map_end;
+ old += efi.memmap.desc_size, new += efi.memmap.desc_size) {
/* copy original EFI memory descriptor */
- memcpy(new, old, memmap.desc_size);
+ memcpy(new, old, efi.memmap.desc_size);
md = new;
start = md->phys_addr;
end = md->phys_addr + (md->num_pages << EFI_PAGE_SHIFT) - 1;
md->num_pages = (m_end - md->phys_addr + 1) >>
EFI_PAGE_SHIFT;
/* latter part */
- new += memmap.desc_size;
- memcpy(new, old, memmap.desc_size);
+ new += efi.memmap.desc_size;
+ memcpy(new, old, efi.memmap.desc_size);
md = new;
md->phys_addr = m_end + 1;
md->num_pages = (end - md->phys_addr + 1) >>
md->num_pages = (m_start - md->phys_addr) >>
EFI_PAGE_SHIFT;
/* middle part */
- new += memmap.desc_size;
- memcpy(new, old, memmap.desc_size);
+ new += efi.memmap.desc_size;
+ memcpy(new, old, efi.memmap.desc_size);
md = new;
md->attribute |= m_attr;
md->phys_addr = m_start;
md->num_pages = (m_end - m_start + 1) >>
EFI_PAGE_SHIFT;
/* last part */
- new += memmap.desc_size;
- memcpy(new, old, memmap.desc_size);
+ new += efi.memmap.desc_size;
+ memcpy(new, old, efi.memmap.desc_size);
md = new;
md->phys_addr = m_end + 1;
md->num_pages = (end - m_end) >>
md->num_pages = (m_start - md->phys_addr) >>
EFI_PAGE_SHIFT;
/* latter part */
- new += memmap.desc_size;
- memcpy(new, old, memmap.desc_size);
+ new += efi.memmap.desc_size;
+ memcpy(new, old, efi.memmap.desc_size);
md = new;
md->phys_addr = m_start;
md->num_pages = (end - md->phys_addr + 1) >>
/* swap into new EFI memmap */
efi_unmap_memmap();
- memmap.map = new_memmap;
- memmap.phys_map = new_memmap_phy;
- memmap.nr_map = new_nr_map;
- memmap.map_end = memmap.map + memmap.nr_map * memmap.desc_size;
+ efi.memmap.map = new_memmap;
+ efi.memmap.phys_map = new_memmap_phy;
+ efi.memmap.nr_map = new_nr_map;
+ efi.memmap.map_end = efi.memmap.map + efi.memmap.nr_map * efi.memmap.desc_size;
set_bit(EFI_MEMMAP, &efi.flags);
/* print new EFI memmap */
# Prevents link failures: __sanitizer_cov_trace_pc() is not linked in.
KCOV_INSTRUMENT := n
-lib-y := efi-stub-helper.o
+lib-y := efi-stub-helper.o gop.o
# include the stub's generic dependencies from lib/ when building for ARM/arm64
arm-deps := fdt_rw.c fdt_ro.c fdt_wip.c fdt.c fdt_empty_tree.c fdt_sw.c sort.c
bool __nokaslr;
-static int efi_secureboot_enabled(efi_system_table_t *sys_table_arg)
+static int efi_get_secureboot(efi_system_table_t *sys_table_arg)
{
- static efi_guid_t const var_guid = EFI_GLOBAL_VARIABLE_GUID;
- static efi_char16_t const var_name[] = {
+ static efi_char16_t const sb_var_name[] = {
'S', 'e', 'c', 'u', 'r', 'e', 'B', 'o', 'o', 't', 0 };
+ static efi_char16_t const sm_var_name[] = {
+ 'S', 'e', 't', 'u', 'p', 'M', 'o', 'd', 'e', 0 };
+ efi_guid_t var_guid = EFI_GLOBAL_VARIABLE_GUID;
efi_get_variable_t *f_getvar = sys_table_arg->runtime->get_variable;
- unsigned long size = sizeof(u8);
- efi_status_t status;
u8 val;
+ unsigned long size = sizeof(val);
+ efi_status_t status;
- status = f_getvar((efi_char16_t *)var_name, (efi_guid_t *)&var_guid,
+ status = f_getvar((efi_char16_t *)sb_var_name, (efi_guid_t *)&var_guid,
NULL, &size, &val);
+ if (status != EFI_SUCCESS)
+ goto out_efi_err;
+
+ if (val == 0)
+ return 0;
+
+ status = f_getvar((efi_char16_t *)sm_var_name, (efi_guid_t *)&var_guid,
+ NULL, &size, &val);
+
+ if (status != EFI_SUCCESS)
+ goto out_efi_err;
+
+ if (val == 1)
+ return 0;
+
+ return 1;
+
+out_efi_err:
switch (status) {
- case EFI_SUCCESS:
- return val;
case EFI_NOT_FOUND:
return 0;
+ case EFI_DEVICE_ERROR:
+ return -EIO;
+ case EFI_SECURITY_VIOLATION:
+ return -EACCES;
default:
- return 1;
+ return -EINVAL;
}
}
out->output_string(out, str);
}
+static struct screen_info *setup_graphics(efi_system_table_t *sys_table_arg)
+{
+ efi_guid_t gop_proto = EFI_GRAPHICS_OUTPUT_PROTOCOL_GUID;
+ efi_status_t status;
+ unsigned long size;
+ void **gop_handle = NULL;
+ struct screen_info *si = NULL;
+
+ size = 0;
+ status = efi_call_early(locate_handle, EFI_LOCATE_BY_PROTOCOL,
+ &gop_proto, NULL, &size, gop_handle);
+ if (status == EFI_BUFFER_TOO_SMALL) {
+ si = alloc_screen_info(sys_table_arg);
+ if (!si)
+ return NULL;
+ efi_setup_gop(sys_table_arg, si, &gop_proto, size);
+ }
+ return si;
+}
/*
* This function handles the architcture specific differences between arm and
efi_guid_t loaded_image_proto = LOADED_IMAGE_PROTOCOL_GUID;
unsigned long reserve_addr = 0;
unsigned long reserve_size = 0;
+ int secure_boot = 0;
+ struct screen_info *si;
/* Check if we were booted by the EFI firmware */
if (sys_table->hdr.signature != EFI_SYSTEM_TABLE_SIGNATURE)
__nokaslr = true;
}
+ si = setup_graphics(sys_table);
+
status = handle_kernel_image(sys_table, image_addr, &image_size,
&reserve_addr,
&reserve_size,
if (status != EFI_SUCCESS)
pr_efi_err(sys_table, "Failed to parse EFI cmdline options\n");
+ secure_boot = efi_get_secureboot(sys_table);
+ if (secure_boot > 0)
+ pr_efi(sys_table, "UEFI Secure Boot is enabled.\n");
+
+ if (secure_boot < 0) {
+ pr_efi_err(sys_table,
+ "could not determine UEFI Secure Boot status.\n");
+ }
+
/*
* Unauthenticated device tree data is a security hazard, so
* ignore 'dtb=' unless UEFI Secure Boot is disabled.
*/
- if (efi_secureboot_enabled(sys_table)) {
- pr_efi(sys_table, "UEFI Secure Boot is enabled.\n");
+ if (secure_boot != 0 && strstr(cmdline_ptr, "dtb=")) {
+ pr_efi(sys_table, "Ignoring DTB from command line.\n");
} else {
status = handle_cmdline_files(sys_table, image, cmdline_ptr,
"dtb=",
efi_free(sys_table, image_size, *image_addr);
efi_free(sys_table, reserve_size, reserve_addr);
fail_free_cmdline:
+ free_screen_info(sys_table, si);
efi_free(sys_table, cmdline_size, (unsigned long)cmdline_ptr);
fail:
return EFI_ERROR;
return EFI_SUCCESS;
}
+static efi_guid_t screen_info_guid = LINUX_EFI_ARM_SCREEN_INFO_TABLE_GUID;
+
+struct screen_info *alloc_screen_info(efi_system_table_t *sys_table_arg)
+{
+ struct screen_info *si;
+ efi_status_t status;
+
+ /*
+ * Unlike on arm64, where we can directly fill out the screen_info
+ * structure from the stub, we need to allocate a buffer to hold
+ * its contents while we hand over to the kernel proper from the
+ * decompressor.
+ */
+ status = efi_call_early(allocate_pool, EFI_RUNTIME_SERVICES_DATA,
+ sizeof(*si), (void **)&si);
+
+ if (status != EFI_SUCCESS)
+ return NULL;
+
+ status = efi_call_early(install_configuration_table,
+ &screen_info_guid, si);
+ if (status == EFI_SUCCESS)
+ return si;
+
+ efi_call_early(free_pool, si);
+ return NULL;
+}
+
+void free_screen_info(efi_system_table_t *sys_table_arg, struct screen_info *si)
+{
+ if (!si)
+ return;
+
+ efi_call_early(install_configuration_table, &screen_info_guid, NULL);
+ efi_call_early(free_pool, si);
+}
+
efi_status_t handle_kernel_image(efi_system_table_t *sys_table,
unsigned long *image_addr,
unsigned long *image_size,
map.map_end = map.map + map_size;
- for_each_efi_memory_desc(&map, md)
- if (md->attribute & EFI_MEMORY_WB)
+ for_each_efi_memory_desc_in_map(&map, md) {
+ if (md->attribute & EFI_MEMORY_WB) {
if (membase > md->phys_addr)
membase = md->phys_addr;
+ }
+ }
efi_call_early(free_pool, map.map);
--- /dev/null
+/* -----------------------------------------------------------------------
+ *
+ * Copyright 2011 Intel Corporation; author Matt Fleming
+ *
+ * This file is part of the Linux kernel, and is made available under
+ * the terms of the GNU General Public License version 2.
+ *
+ * ----------------------------------------------------------------------- */
+
+#include <linux/efi.h>
+#include <linux/screen_info.h>
+#include <asm/efi.h>
+#include <asm/setup.h>
+
+static void find_bits(unsigned long mask, u8 *pos, u8 *size)
+{
+ u8 first, len;
+
+ first = 0;
+ len = 0;
+
+ if (mask) {
+ while (!(mask & 0x1)) {
+ mask = mask >> 1;
+ first++;
+ }
+
+ while (mask & 0x1) {
+ mask = mask >> 1;
+ len++;
+ }
+ }
+
+ *pos = first;
+ *size = len;
+}
+
+static void
+setup_pixel_info(struct screen_info *si, u32 pixels_per_scan_line,
+ struct efi_pixel_bitmask pixel_info, int pixel_format)
+{
+ if (pixel_format == PIXEL_RGB_RESERVED_8BIT_PER_COLOR) {
+ si->lfb_depth = 32;
+ si->lfb_linelength = pixels_per_scan_line * 4;
+ si->red_size = 8;
+ si->red_pos = 0;
+ si->green_size = 8;
+ si->green_pos = 8;
+ si->blue_size = 8;
+ si->blue_pos = 16;
+ si->rsvd_size = 8;
+ si->rsvd_pos = 24;
+ } else if (pixel_format == PIXEL_BGR_RESERVED_8BIT_PER_COLOR) {
+ si->lfb_depth = 32;
+ si->lfb_linelength = pixels_per_scan_line * 4;
+ si->red_size = 8;
+ si->red_pos = 16;
+ si->green_size = 8;
+ si->green_pos = 8;
+ si->blue_size = 8;
+ si->blue_pos = 0;
+ si->rsvd_size = 8;
+ si->rsvd_pos = 24;
+ } else if (pixel_format == PIXEL_BIT_MASK) {
+ find_bits(pixel_info.red_mask, &si->red_pos, &si->red_size);
+ find_bits(pixel_info.green_mask, &si->green_pos,
+ &si->green_size);
+ find_bits(pixel_info.blue_mask, &si->blue_pos, &si->blue_size);
+ find_bits(pixel_info.reserved_mask, &si->rsvd_pos,
+ &si->rsvd_size);
+ si->lfb_depth = si->red_size + si->green_size +
+ si->blue_size + si->rsvd_size;
+ si->lfb_linelength = (pixels_per_scan_line * si->lfb_depth) / 8;
+ } else {
+ si->lfb_depth = 4;
+ si->lfb_linelength = si->lfb_width / 2;
+ si->red_size = 0;
+ si->red_pos = 0;
+ si->green_size = 0;
+ si->green_pos = 0;
+ si->blue_size = 0;
+ si->blue_pos = 0;
+ si->rsvd_size = 0;
+ si->rsvd_pos = 0;
+ }
+}
+
+static efi_status_t
+__gop_query32(efi_system_table_t *sys_table_arg,
+ struct efi_graphics_output_protocol_32 *gop32,
+ struct efi_graphics_output_mode_info **info,
+ unsigned long *size, u64 *fb_base)
+{
+ struct efi_graphics_output_protocol_mode_32 *mode;
+ efi_graphics_output_protocol_query_mode query_mode;
+ efi_status_t status;
+ unsigned long m;
+
+ m = gop32->mode;
+ mode = (struct efi_graphics_output_protocol_mode_32 *)m;
+ query_mode = (void *)(unsigned long)gop32->query_mode;
+
+ status = __efi_call_early(query_mode, (void *)gop32, mode->mode, size,
+ info);
+ if (status != EFI_SUCCESS)
+ return status;
+
+ *fb_base = mode->frame_buffer_base;
+ return status;
+}
+
+static efi_status_t
+setup_gop32(efi_system_table_t *sys_table_arg, struct screen_info *si,
+ efi_guid_t *proto, unsigned long size, void **gop_handle)
+{
+ struct efi_graphics_output_protocol_32 *gop32, *first_gop;
+ unsigned long nr_gops;
+ u16 width, height;
+ u32 pixels_per_scan_line;
+ u32 ext_lfb_base;
+ u64 fb_base;
+ struct efi_pixel_bitmask pixel_info;
+ int pixel_format;
+ efi_status_t status = EFI_NOT_FOUND;
+ u32 *handles = (u32 *)(unsigned long)gop_handle;
+ int i;
+
+ first_gop = NULL;
+ gop32 = NULL;
+
+ nr_gops = size / sizeof(u32);
+ for (i = 0; i < nr_gops; i++) {
+ struct efi_graphics_output_mode_info *info = NULL;
+ efi_guid_t conout_proto = EFI_CONSOLE_OUT_DEVICE_GUID;
+ bool conout_found = false;
+ void *dummy = NULL;
+ efi_handle_t h = (efi_handle_t)(unsigned long)handles[i];
+ u64 current_fb_base;
+
+ status = efi_call_early(handle_protocol, h,
+ proto, (void **)&gop32);
+ if (status != EFI_SUCCESS)
+ continue;
+
+ status = efi_call_early(handle_protocol, h,
+ &conout_proto, &dummy);
+ if (status == EFI_SUCCESS)
+ conout_found = true;
+
+ status = __gop_query32(sys_table_arg, gop32, &info, &size,
+ ¤t_fb_base);
+ if (status == EFI_SUCCESS && (!first_gop || conout_found)) {
+ /*
+ * Systems that use the UEFI Console Splitter may
+ * provide multiple GOP devices, not all of which are
+ * backed by real hardware. The workaround is to search
+ * for a GOP implementing the ConOut protocol, and if
+ * one isn't found, to just fall back to the first GOP.
+ */
+ width = info->horizontal_resolution;
+ height = info->vertical_resolution;
+ pixel_format = info->pixel_format;
+ pixel_info = info->pixel_information;
+ pixels_per_scan_line = info->pixels_per_scan_line;
+ fb_base = current_fb_base;
+
+ /*
+ * Once we've found a GOP supporting ConOut,
+ * don't bother looking any further.
+ */
+ first_gop = gop32;
+ if (conout_found)
+ break;
+ }
+ }
+
+ /* Did we find any GOPs? */
+ if (!first_gop)
+ goto out;
+
+ /* EFI framebuffer */
+ si->orig_video_isVGA = VIDEO_TYPE_EFI;
+
+ si->lfb_width = width;
+ si->lfb_height = height;
+ si->lfb_base = fb_base;
+
+ ext_lfb_base = (u64)(unsigned long)fb_base >> 32;
+ if (ext_lfb_base) {
+ si->capabilities |= VIDEO_CAPABILITY_64BIT_BASE;
+ si->ext_lfb_base = ext_lfb_base;
+ }
+
+ si->pages = 1;
+
+ setup_pixel_info(si, pixels_per_scan_line, pixel_info, pixel_format);
+
+ si->lfb_size = si->lfb_linelength * si->lfb_height;
+
+ si->capabilities |= VIDEO_CAPABILITY_SKIP_QUIRKS;
+out:
+ return status;
+}
+
+static efi_status_t
+__gop_query64(efi_system_table_t *sys_table_arg,
+ struct efi_graphics_output_protocol_64 *gop64,
+ struct efi_graphics_output_mode_info **info,
+ unsigned long *size, u64 *fb_base)
+{
+ struct efi_graphics_output_protocol_mode_64 *mode;
+ efi_graphics_output_protocol_query_mode query_mode;
+ efi_status_t status;
+ unsigned long m;
+
+ m = gop64->mode;
+ mode = (struct efi_graphics_output_protocol_mode_64 *)m;
+ query_mode = (void *)(unsigned long)gop64->query_mode;
+
+ status = __efi_call_early(query_mode, (void *)gop64, mode->mode, size,
+ info);
+ if (status != EFI_SUCCESS)
+ return status;
+
+ *fb_base = mode->frame_buffer_base;
+ return status;
+}
+
+static efi_status_t
+setup_gop64(efi_system_table_t *sys_table_arg, struct screen_info *si,
+ efi_guid_t *proto, unsigned long size, void **gop_handle)
+{
+ struct efi_graphics_output_protocol_64 *gop64, *first_gop;
+ unsigned long nr_gops;
+ u16 width, height;
+ u32 pixels_per_scan_line;
+ u32 ext_lfb_base;
+ u64 fb_base;
+ struct efi_pixel_bitmask pixel_info;
+ int pixel_format;
+ efi_status_t status = EFI_NOT_FOUND;
+ u64 *handles = (u64 *)(unsigned long)gop_handle;
+ int i;
+
+ first_gop = NULL;
+ gop64 = NULL;
+
+ nr_gops = size / sizeof(u64);
+ for (i = 0; i < nr_gops; i++) {
+ struct efi_graphics_output_mode_info *info = NULL;
+ efi_guid_t conout_proto = EFI_CONSOLE_OUT_DEVICE_GUID;
+ bool conout_found = false;
+ void *dummy = NULL;
+ efi_handle_t h = (efi_handle_t)(unsigned long)handles[i];
+ u64 current_fb_base;
+
+ status = efi_call_early(handle_protocol, h,
+ proto, (void **)&gop64);
+ if (status != EFI_SUCCESS)
+ continue;
+
+ status = efi_call_early(handle_protocol, h,
+ &conout_proto, &dummy);
+ if (status == EFI_SUCCESS)
+ conout_found = true;
+
+ status = __gop_query64(sys_table_arg, gop64, &info, &size,
+ ¤t_fb_base);
+ if (status == EFI_SUCCESS && (!first_gop || conout_found)) {
+ /*
+ * Systems that use the UEFI Console Splitter may
+ * provide multiple GOP devices, not all of which are
+ * backed by real hardware. The workaround is to search
+ * for a GOP implementing the ConOut protocol, and if
+ * one isn't found, to just fall back to the first GOP.
+ */
+ width = info->horizontal_resolution;
+ height = info->vertical_resolution;
+ pixel_format = info->pixel_format;
+ pixel_info = info->pixel_information;
+ pixels_per_scan_line = info->pixels_per_scan_line;
+ fb_base = current_fb_base;
+
+ /*
+ * Once we've found a GOP supporting ConOut,
+ * don't bother looking any further.
+ */
+ first_gop = gop64;
+ if (conout_found)
+ break;
+ }
+ }
+
+ /* Did we find any GOPs? */
+ if (!first_gop)
+ goto out;
+
+ /* EFI framebuffer */
+ si->orig_video_isVGA = VIDEO_TYPE_EFI;
+
+ si->lfb_width = width;
+ si->lfb_height = height;
+ si->lfb_base = fb_base;
+
+ ext_lfb_base = (u64)(unsigned long)fb_base >> 32;
+ if (ext_lfb_base) {
+ si->capabilities |= VIDEO_CAPABILITY_64BIT_BASE;
+ si->ext_lfb_base = ext_lfb_base;
+ }
+
+ si->pages = 1;
+
+ setup_pixel_info(si, pixels_per_scan_line, pixel_info, pixel_format);
+
+ si->lfb_size = si->lfb_linelength * si->lfb_height;
+
+ si->capabilities |= VIDEO_CAPABILITY_SKIP_QUIRKS;
+out:
+ return status;
+}
+
+/*
+ * See if we have Graphics Output Protocol
+ */
+efi_status_t efi_setup_gop(efi_system_table_t *sys_table_arg,
+ struct screen_info *si, efi_guid_t *proto,
+ unsigned long size)
+{
+ efi_status_t status;
+ void **gop_handle = NULL;
+
+ status = efi_call_early(allocate_pool, EFI_LOADER_DATA,
+ size, (void **)&gop_handle);
+ if (status != EFI_SUCCESS)
+ return status;
+
+ status = efi_call_early(locate_handle,
+ EFI_LOCATE_BY_PROTOCOL,
+ proto, NULL, &size, gop_handle);
+ if (status != EFI_SUCCESS)
+ goto free_handle;
+
+ if (efi_is_64bit()) {
+ status = setup_gop64(sys_table_arg, si, proto, size,
+ gop_handle);
+ } else {
+ status = setup_gop32(sys_table_arg, si, proto, size,
+ gop_handle);
+ }
+
+free_handle:
+ efi_call_early(free_pool, gop_handle);
+ return status;
+}
--- /dev/null
+/*
+ * Copyright (C) 2016 Linaro Ltd. <ard.biesheuvel@linaro.org>
+ *
+ * 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.
+ */
+
+#define pr_fmt(fmt) "efi: memattr: " fmt
+
+#include <linux/efi.h>
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/memblock.h>
+
+#include <asm/early_ioremap.h>
+
+static int __initdata tbl_size;
+
+/*
+ * Reserve the memory associated with the Memory Attributes configuration
+ * table, if it exists.
+ */
+int __init efi_memattr_init(void)
+{
+ efi_memory_attributes_table_t *tbl;
+
+ if (efi.mem_attr_table == EFI_INVALID_TABLE_ADDR)
+ return 0;
+
+ tbl = early_memremap(efi.mem_attr_table, sizeof(*tbl));
+ if (!tbl) {
+ pr_err("Failed to map EFI Memory Attributes table @ 0x%lx\n",
+ efi.mem_attr_table);
+ return -ENOMEM;
+ }
+
+ if (tbl->version > 1) {
+ pr_warn("Unexpected EFI Memory Attributes table version %d\n",
+ tbl->version);
+ goto unmap;
+ }
+
+ tbl_size = sizeof(*tbl) + tbl->num_entries * tbl->desc_size;
+ memblock_reserve(efi.mem_attr_table, tbl_size);
+
+unmap:
+ early_memunmap(tbl, sizeof(*tbl));
+ return 0;
+}
+
+/*
+ * Returns a copy @out of the UEFI memory descriptor @in if it is covered
+ * entirely by a UEFI memory map entry with matching attributes. The virtual
+ * address of @out is set according to the matching entry that was found.
+ */
+static bool entry_is_valid(const efi_memory_desc_t *in, efi_memory_desc_t *out)
+{
+ u64 in_paddr = in->phys_addr;
+ u64 in_size = in->num_pages << EFI_PAGE_SHIFT;
+ efi_memory_desc_t *md;
+
+ *out = *in;
+
+ if (in->type != EFI_RUNTIME_SERVICES_CODE &&
+ in->type != EFI_RUNTIME_SERVICES_DATA) {
+ pr_warn("Entry type should be RuntimeServiceCode/Data\n");
+ return false;
+ }
+
+ if (!(in->attribute & (EFI_MEMORY_RO | EFI_MEMORY_XP))) {
+ pr_warn("Entry attributes invalid: RO and XP bits both cleared\n");
+ return false;
+ }
+
+ if (PAGE_SIZE > EFI_PAGE_SIZE &&
+ (!PAGE_ALIGNED(in->phys_addr) ||
+ !PAGE_ALIGNED(in->num_pages << EFI_PAGE_SHIFT))) {
+ /*
+ * Since arm64 may execute with page sizes of up to 64 KB, the
+ * UEFI spec mandates that RuntimeServices memory regions must
+ * be 64 KB aligned. We need to validate this here since we will
+ * not be able to tighten permissions on such regions without
+ * affecting adjacent regions.
+ */
+ pr_warn("Entry address region misaligned\n");
+ return false;
+ }
+
+ for_each_efi_memory_desc(md) {
+ u64 md_paddr = md->phys_addr;
+ u64 md_size = md->num_pages << EFI_PAGE_SHIFT;
+
+ if (!(md->attribute & EFI_MEMORY_RUNTIME))
+ continue;
+ if (md->virt_addr == 0) {
+ /* no virtual mapping has been installed by the stub */
+ break;
+ }
+
+ if (md_paddr > in_paddr || (in_paddr - md_paddr) >= md_size)
+ continue;
+
+ /*
+ * This entry covers the start of @in, check whether
+ * it covers the end as well.
+ */
+ if (md_paddr + md_size < in_paddr + in_size) {
+ pr_warn("Entry covers multiple EFI memory map regions\n");
+ return false;
+ }
+
+ if (md->type != in->type) {
+ pr_warn("Entry type deviates from EFI memory map region type\n");
+ return false;
+ }
+
+ out->virt_addr = in_paddr + (md->virt_addr - md_paddr);
+
+ return true;
+ }
+
+ pr_warn("No matching entry found in the EFI memory map\n");
+ return false;
+}
+
+/*
+ * To be called after the EFI page tables have been populated. If a memory
+ * attributes table is available, its contents will be used to update the
+ * mappings with tightened permissions as described by the table.
+ * This requires the UEFI memory map to have already been populated with
+ * virtual addresses.
+ */
+int __init efi_memattr_apply_permissions(struct mm_struct *mm,
+ efi_memattr_perm_setter fn)
+{
+ efi_memory_attributes_table_t *tbl;
+ int i, ret;
+
+ if (tbl_size <= sizeof(*tbl))
+ return 0;
+
+ /*
+ * We need the EFI memory map to be setup so we can use it to
+ * lookup the virtual addresses of all entries in the of EFI
+ * Memory Attributes table. If it isn't available, this
+ * function should not be called.
+ */
+ if (WARN_ON(!efi_enabled(EFI_MEMMAP)))
+ return 0;
+
+ tbl = memremap(efi.mem_attr_table, tbl_size, MEMREMAP_WB);
+ if (!tbl) {
+ pr_err("Failed to map EFI Memory Attributes table @ 0x%lx\n",
+ efi.mem_attr_table);
+ return -ENOMEM;
+ }
+
+ if (efi_enabled(EFI_DBG))
+ pr_info("Processing EFI Memory Attributes table:\n");
+
+ for (i = ret = 0; ret == 0 && i < tbl->num_entries; i++) {
+ efi_memory_desc_t md;
+ unsigned long size;
+ bool valid;
+ char buf[64];
+
+ valid = entry_is_valid((void *)tbl->entry + i * tbl->desc_size,
+ &md);
+ size = md.num_pages << EFI_PAGE_SHIFT;
+ if (efi_enabled(EFI_DBG) || !valid)
+ pr_info("%s 0x%012llx-0x%012llx %s\n",
+ valid ? "" : "!", md.phys_addr,
+ md.phys_addr + size - 1,
+ efi_md_typeattr_format(buf, sizeof(buf), &md));
+
+ if (valid)
+ ret = fn(mm, &md);
+ }
+ memunmap(tbl);
+ return ret;
+}
void efi_reboot(enum reboot_mode reboot_mode, const char *__unused)
{
- int efi_mode;
+ const char *str[] = { "cold", "warm", "shutdown", "platform" };
+ int efi_mode, cap_reset_mode;
if (!efi_enabled(EFI_RUNTIME_SERVICES))
return;
if (efi_reboot_quirk_mode != -1)
efi_mode = efi_reboot_quirk_mode;
+ if (efi_capsule_pending(&cap_reset_mode)) {
+ if (efi_mode != cap_reset_mode)
+ printk(KERN_CRIT "efi: %s reset requested but pending "
+ "capsule update requires %s reset... Performing "
+ "%s reset.\n", str[efi_mode], str[cap_reset_mode],
+ str[cap_reset_mode]);
+ efi_mode = cap_reset_mode;
+ }
+
efi.reset_system(efi_mode, EFI_SUCCESS, 0, NULL);
}
#include <linux/bug.h>
#include <linux/efi.h>
+#include <linux/irqflags.h>
#include <linux/mutex.h>
#include <linux/spinlock.h>
+#include <linux/stringify.h>
#include <asm/efi.h>
+static void efi_call_virt_check_flags(unsigned long flags, const char *call)
+{
+ unsigned long cur_flags, mismatch;
+
+ local_save_flags(cur_flags);
+
+ mismatch = flags ^ cur_flags;
+ if (!WARN_ON_ONCE(mismatch & ARCH_EFI_IRQ_FLAGS_MASK))
+ return;
+
+ add_taint(TAINT_FIRMWARE_WORKAROUND, LOCKDEP_NOW_UNRELIABLE);
+ pr_err_ratelimited(FW_BUG "IRQ flags corrupted (0x%08lx=>0x%08lx) by EFI %s\n",
+ flags, cur_flags, call);
+ local_irq_restore(flags);
+}
+
+/*
+ * Arch code can implement the following three template macros, avoiding
+ * reptition for the void/non-void return cases of {__,}efi_call_virt:
+ *
+ * * arch_efi_call_virt_setup
+ *
+ * Sets up the environment for the call (e.g. switching page tables,
+ * allowing kernel-mode use of floating point, if required).
+ *
+ * * arch_efi_call_virt
+ *
+ * Performs the call. The last expression in the macro must be the call
+ * itself, allowing the logic to be shared by the void and non-void
+ * cases.
+ *
+ * * arch_efi_call_virt_teardown
+ *
+ * Restores the usual kernel environment once the call has returned.
+ */
+
+#define efi_call_virt(f, args...) \
+({ \
+ efi_status_t __s; \
+ unsigned long flags; \
+ arch_efi_call_virt_setup(); \
+ local_save_flags(flags); \
+ __s = arch_efi_call_virt(f, args); \
+ efi_call_virt_check_flags(flags, __stringify(f)); \
+ arch_efi_call_virt_teardown(); \
+ __s; \
+})
+
+#define __efi_call_virt(f, args...) \
+({ \
+ unsigned long flags; \
+ arch_efi_call_virt_setup(); \
+ local_save_flags(flags); \
+ arch_efi_call_virt(f, args); \
+ efi_call_virt_check_flags(flags, __stringify(f)); \
+ arch_efi_call_virt_teardown(); \
+})
+
/*
* According to section 7.1 of the UEFI spec, Runtime Services are not fully
* reentrant, and there are particular combinations of calls that need to be
return fops->query_variable_store(attributes, size, true);
}
-static int efi_status_to_err(efi_status_t status)
-{
- int err;
-
- switch (status) {
- case EFI_SUCCESS:
- err = 0;
- break;
- case EFI_INVALID_PARAMETER:
- err = -EINVAL;
- break;
- case EFI_OUT_OF_RESOURCES:
- err = -ENOSPC;
- break;
- case EFI_DEVICE_ERROR:
- err = -EIO;
- break;
- case EFI_WRITE_PROTECTED:
- err = -EROFS;
- break;
- case EFI_SECURITY_VIOLATION:
- err = -EACCES;
- break;
- case EFI_NOT_FOUND:
- err = -ENOENT;
- break;
- default:
- err = -EINVAL;
- }
-
- return err;
-}
-
static bool variable_is_present(efi_char16_t *variable_name, efi_guid_t *vendor,
struct list_head *head)
{
* Returns 0 on success, or a kernel error code on failure.
*/
int efivar_init(int (*func)(efi_char16_t *, efi_guid_t, unsigned long, void *),
- void *data, bool atomic, bool duplicates,
- struct list_head *head)
+ void *data, bool duplicates, struct list_head *head)
{
const struct efivar_operations *ops = __efivars->ops;
unsigned long variable_name_size = 1024;
&vendor_guid);
switch (status) {
case EFI_SUCCESS:
- if (!atomic)
+ if (duplicates)
spin_unlock_irq(&__efivars->lock);
variable_name_size = var_name_strnsize(variable_name,
* and may end up looping here forever.
*/
if (duplicates &&
- variable_is_present(variable_name, &vendor_guid, head)) {
+ variable_is_present(variable_name, &vendor_guid,
+ head)) {
dup_variable_bug(variable_name, &vendor_guid,
variable_name_size);
- if (!atomic)
- spin_lock_irq(&__efivars->lock);
-
status = EFI_NOT_FOUND;
- break;
+ } else {
+ err = func(variable_name, vendor_guid,
+ variable_name_size, data);
+ if (err)
+ status = EFI_NOT_FOUND;
}
- err = func(variable_name, vendor_guid, variable_name_size, data);
- if (err)
- status = EFI_NOT_FOUND;
-
- if (!atomic)
+ if (duplicates)
spin_lock_irq(&__efivars->lock);
break;
config FB_EFI
bool "EFI-based Framebuffer Support"
- depends on (FB = y) && X86 && EFI
+ depends on (FB = y) && !IA64 && EFI
select FB_CFB_FILLRECT
select FB_CFB_COPYAREA
select FB_CFB_IMAGEBLIT
*
*/
-#include <linux/module.h>
#include <linux/kernel.h>
+#include <linux/efi.h>
#include <linux/errno.h>
#include <linux/fb.h>
#include <linux/platform_device.h>
#include <linux/screen_info.h>
-#include <linux/dmi.h>
-#include <linux/pci.h>
#include <video/vga.h>
-#include <asm/sysfb.h>
+#include <asm/efi.h>
static bool request_mem_succeeded = false;
static int efifb_setup(char *options)
{
char *this_opt;
- int i;
if (options && *options) {
while ((this_opt = strsep(&options, ",")) != NULL) {
if (!*this_opt) continue;
- for (i = 0; i < M_UNKNOWN; i++) {
- if (efifb_dmi_list[i].base != 0 &&
- !strcmp(this_opt, efifb_dmi_list[i].optname)) {
- screen_info.lfb_base = efifb_dmi_list[i].base;
- screen_info.lfb_linelength = efifb_dmi_list[i].stride;
- screen_info.lfb_width = efifb_dmi_list[i].width;
- screen_info.lfb_height = efifb_dmi_list[i].height;
- }
- }
+ efifb_setup_from_dmi(&screen_info, this_opt);
+
if (!strncmp(this_opt, "base:", 5))
screen_info.lfb_base = simple_strtoul(this_opt+5, NULL, 0);
else if (!strncmp(this_opt, "stride:", 7))
.remove = efifb_remove,
};
-module_platform_driver(efifb_driver);
-MODULE_LICENSE("GPL");
+builtin_platform_driver(efifb_driver);
.get_next_high_mono_count = xen_efi_get_next_high_mono_count,
.reset_system = NULL, /* Functionality provided by Xen. */
.set_virtual_address_map = NULL, /* Not used under Xen. */
- .memmap = NULL, /* Not used under Xen. */
.flags = 0 /* Initialized later. */
};
return 0;
}
-long
+static long
efivarfs_file_ioctl(struct file *file, unsigned int cmd, unsigned long p)
{
void __user *arg = (void __user *)p;
INIT_LIST_HEAD(&efivarfs_list);
- err = efivar_init(efivarfs_callback, (void *)sb, false,
- true, &efivarfs_list);
+ err = efivar_init(efivarfs_callback, (void *)sb, true, &efivarfs_list);
if (err)
__efivar_entry_iter(efivarfs_destroy, &efivarfs_list, NULL, NULL);
#include <linux/pfn.h>
#include <linux/pstore.h>
#include <linux/reboot.h>
+#include <linux/screen_info.h>
#include <asm/page.h>
u32 imagesize;
} efi_capsule_header_t;
+/*
+ * EFI capsule flags
+ */
+#define EFI_CAPSULE_PERSIST_ACROSS_RESET 0x00010000
+#define EFI_CAPSULE_POPULATE_SYSTEM_TABLE 0x00020000
+#define EFI_CAPSULE_INITIATE_RESET 0x00040000
+
/*
* Allocation types for calls to boottime->allocate_pages.
*/
efi_status_t (*handle_protocol)(efi_handle_t, efi_guid_t *, void **);
void *__reserved;
void *register_protocol_notify;
- void *locate_handle;
+ efi_status_t (*locate_handle)(int, efi_guid_t *, void *,
+ unsigned long *, efi_handle_t *);
void *locate_device_path;
- void *install_configuration_table;
+ efi_status_t (*install_configuration_table)(efi_guid_t *, void *);
void *load_image;
void *start_image;
void *exit;
EFI_GUID(0x3152bca5, 0xeade, 0x433d, \
0x86, 0x2e, 0xc0, 0x1c, 0xdc, 0x29, 0x1f, 0x44)
+#define EFI_MEMORY_ATTRIBUTES_TABLE_GUID \
+ EFI_GUID(0xdcfa911d, 0x26eb, 0x469f, \
+ 0xa2, 0x20, 0x38, 0xb7, 0xdc, 0x46, 0x12, 0x20)
+
+#define EFI_CONSOLE_OUT_DEVICE_GUID \
+ EFI_GUID(0xd3b36f2c, 0xd551, 0x11d4, \
+ 0x9a, 0x46, 0x00, 0x90, 0x27, 0x3f, 0xc1, 0x4d)
+
+/*
+ * This GUID is used to pass to the kernel proper the struct screen_info
+ * structure that was populated by the stub based on the GOP protocol instance
+ * associated with ConOut
+ */
+#define LINUX_EFI_ARM_SCREEN_INFO_TABLE_GUID \
+ EFI_GUID(0xe03fc20a, 0x85dc, 0x406e, \
+ 0xb9, 0xe, 0x4a, 0xb5, 0x02, 0x37, 0x1d, 0x95)
+
+#define LINUX_EFI_LOADER_ENTRY_GUID \
+ EFI_GUID(0x4a67b082, 0x0a4c, 0x41cf, \
+ 0xb6, 0xc7, 0x44, 0x0b, 0x29, 0xbb, 0x8c, 0x4f)
+
typedef struct {
efi_guid_t guid;
u64 table;
#define EFI_INVALID_TABLE_ADDR (~0UL)
+typedef struct {
+ u32 version;
+ u32 num_entries;
+ u32 desc_size;
+ u32 reserved;
+ efi_memory_desc_t entry[0];
+} efi_memory_attributes_table_t;
+
/*
* All runtime access to EFI goes through this structure:
*/
unsigned long config_table; /* config tables */
unsigned long esrt; /* ESRT table */
unsigned long properties_table; /* properties table */
+ unsigned long mem_attr_table; /* memory attributes table */
efi_get_time_t *get_time;
efi_set_time_t *set_time;
efi_get_wakeup_time_t *get_wakeup_time;
efi_get_next_high_mono_count_t *get_next_high_mono_count;
efi_reset_system_t *reset_system;
efi_set_virtual_address_map_t *set_virtual_address_map;
- struct efi_memory_map *memmap;
+ struct efi_memory_map memmap;
unsigned long flags;
} efi;
extern void efi_get_time(struct timespec *now);
extern void efi_reserve_boot_services(void);
extern int efi_get_fdt_params(struct efi_fdt_params *params);
-extern struct efi_memory_map memmap;
extern struct kobject *efi_kobj;
extern int efi_reboot_quirk_mode;
static inline void efi_fake_memmap(void) { }
#endif
+/*
+ * efi_memattr_perm_setter - arch specific callback function passed into
+ * efi_memattr_apply_permissions() that updates the
+ * mapping permissions described by the second
+ * argument in the page tables referred to by the
+ * first argument.
+ */
+typedef int (*efi_memattr_perm_setter)(struct mm_struct *, efi_memory_desc_t *);
+
+extern int efi_memattr_init(void);
+extern int efi_memattr_apply_permissions(struct mm_struct *mm,
+ efi_memattr_perm_setter fn);
+
/* Iterate through an efi_memory_map */
-#define for_each_efi_memory_desc(m, md) \
+#define for_each_efi_memory_desc_in_map(m, md) \
for ((md) = (m)->map; \
(md) <= (efi_memory_desc_t *)((m)->map_end - (m)->desc_size); \
(md) = (void *)(md) + (m)->desc_size)
+/**
+ * for_each_efi_memory_desc - iterate over descriptors in efi.memmap
+ * @md: the efi_memory_desc_t * iterator
+ *
+ * Once the loop finishes @md must not be accessed.
+ */
+#define for_each_efi_memory_desc(md) \
+ for_each_efi_memory_desc_in_map(&efi.memmap, md)
+
/*
* Format an EFI memory descriptor's type and attributes to a user-provided
* character buffer, as per snprintf(), and return the buffer.
* possible, remove EFI-related code altogether.
*/
#define EFI_BOOT 0 /* Were we booted from EFI? */
-#define EFI_SYSTEM_TABLES 1 /* Can we use EFI system tables? */
#define EFI_CONFIG_TABLES 2 /* Can we use EFI config tables? */
#define EFI_RUNTIME_SERVICES 3 /* Can we use runtime services? */
#define EFI_MEMMAP 4 /* Can we use EFI memory map? */
}
static inline void
efi_reboot(enum reboot_mode reboot_mode, const char *__unused) {}
+
+static inline bool
+efi_capsule_pending(int *reset_type)
+{
+ return false;
+}
#endif
+extern int efi_status_to_err(efi_status_t status);
+
/*
* Variable Attributes
*/
void *test_string;
};
+#define PIXEL_RGB_RESERVED_8BIT_PER_COLOR 0
+#define PIXEL_BGR_RESERVED_8BIT_PER_COLOR 1
+#define PIXEL_BIT_MASK 2
+#define PIXEL_BLT_ONLY 3
+#define PIXEL_FORMAT_MAX 4
+
+struct efi_pixel_bitmask {
+ u32 red_mask;
+ u32 green_mask;
+ u32 blue_mask;
+ u32 reserved_mask;
+};
+
+struct efi_graphics_output_mode_info {
+ u32 version;
+ u32 horizontal_resolution;
+ u32 vertical_resolution;
+ int pixel_format;
+ struct efi_pixel_bitmask pixel_information;
+ u32 pixels_per_scan_line;
+} __packed;
+
+struct efi_graphics_output_protocol_mode_32 {
+ u32 max_mode;
+ u32 mode;
+ u32 info;
+ u32 size_of_info;
+ u64 frame_buffer_base;
+ u32 frame_buffer_size;
+} __packed;
+
+struct efi_graphics_output_protocol_mode_64 {
+ u32 max_mode;
+ u32 mode;
+ u64 info;
+ u64 size_of_info;
+ u64 frame_buffer_base;
+ u64 frame_buffer_size;
+} __packed;
+
+struct efi_graphics_output_protocol_mode {
+ u32 max_mode;
+ u32 mode;
+ unsigned long info;
+ unsigned long size_of_info;
+ u64 frame_buffer_base;
+ unsigned long frame_buffer_size;
+} __packed;
+
+struct efi_graphics_output_protocol_32 {
+ u32 query_mode;
+ u32 set_mode;
+ u32 blt;
+ u32 mode;
+};
+
+struct efi_graphics_output_protocol_64 {
+ u64 query_mode;
+ u64 set_mode;
+ u64 blt;
+ u64 mode;
+};
+
+struct efi_graphics_output_protocol {
+ unsigned long query_mode;
+ unsigned long set_mode;
+ unsigned long blt;
+ struct efi_graphics_output_protocol_mode *mode;
+};
+
+typedef efi_status_t (*efi_graphics_output_protocol_query_mode)(
+ struct efi_graphics_output_protocol *, u32, unsigned long *,
+ struct efi_graphics_output_mode_info **);
+
extern struct list_head efivar_sysfs_list;
static inline void
struct kobject *efivars_kobject(void);
int efivar_init(int (*func)(efi_char16_t *, efi_guid_t, unsigned long, void *),
- void *data, bool atomic, bool duplicates,
- struct list_head *head);
+ void *data, bool duplicates, struct list_head *head);
void efivar_entry_add(struct efivar_entry *entry, struct list_head *head);
void efivar_entry_remove(struct efivar_entry *entry);
#define EFIVARS_DATA_SIZE_MAX 1024
#endif /* CONFIG_EFI_VARS */
+extern bool efi_capsule_pending(int *reset_type);
+
+extern int efi_capsule_supported(efi_guid_t guid, u32 flags,
+ size_t size, int *reset);
+
+extern int efi_capsule_update(efi_capsule_header_t *capsule,
+ struct page **pages);
#ifdef CONFIG_EFI_RUNTIME_MAP
int efi_runtime_map_init(struct kobject *);
efi_status_t efi_parse_options(char *cmdline);
+efi_status_t efi_setup_gop(efi_system_table_t *sys_table_arg,
+ struct screen_info *si, efi_guid_t *proto,
+ unsigned long size);
+
bool efi_runtime_disabled(void);
#endif /* _LINUX_EFI_H */
projects / linux-2.6-block.git / commitdiff