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Commit cd40fab6 authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 

Pull x86 fixes from Ingo Molnar:
 "This has:

   - EFI revert to fix a boot regression
   - early_ioremap() fix for boot failure
   - KASLR fix for possible boot failures
   - EFI fix for corrupted string printing
   - remove a misleading EFI bootup 'failed!' error message

  Unfortunately it's all rather close to the merge window"

* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/efi: Truncate 64-bit values when calling 32-bit OutputString()
  x86/efi: Delete misleading efi_printk() error message
  Revert "efi/x86: efistub: Move shared dependencies to <asm/efi.h>"
  x86/kaslr: Avoid the setup_data area when picking location
  x86 early_ioremap: Increase FIX_BTMAPS_SLOTS to 8
parents c6ff6486 29282ac0

arch/x86/boot/compressed/Makefile

+1 −2
Original line number Diff line number Diff line
@@ -33,8 +33,7 @@ VMLINUX_OBJS = $(obj)/vmlinux.lds $(obj)/head_$(BITS).o $(obj)/misc.o \ 
$(obj)/eboot.o: KBUILD_CFLAGS += -fshort-wchar -mno-red-zone



ifeq ($(CONFIG_EFI_STUB), y)

	VMLINUX_OBJS += $(obj)/eboot.o $(obj)/efi_stub_$(BITS).o \

				$(objtree)/drivers/firmware/efi/libstub/lib.a

	VMLINUX_OBJS += $(obj)/eboot.o $(obj)/efi_stub_$(BITS).o

endif



$(obj)/vmlinux: $(VMLINUX_OBJS) FORCE

arch/x86/boot/compressed/aslr.c

+15 −0
Original line number Diff line number Diff line
@@ -183,12 +183,27 @@ static void mem_avoid_init(unsigned long input, unsigned long input_size, 
static bool mem_avoid_overlap(struct mem_vector *img)

{

	int i;

	struct setup_data *ptr;



	for (i = 0; i < MEM_AVOID_MAX; i++) {

		if (mem_overlaps(img, &mem_avoid[i]))

			return true;

	}



	/* Avoid all entries in the setup_data linked list. */

	ptr = (struct setup_data *)(unsigned long)real_mode->hdr.setup_data;

	while (ptr) {

		struct mem_vector avoid;



		avoid.start = (u64)ptr;

		avoid.size = sizeof(*ptr) + ptr->len;



		if (mem_overlaps(img, &avoid))

			return true;



		ptr = (struct setup_data *)(unsigned long)ptr->next;

	}



	return false;

}

arch/x86/boot/compressed/eboot.c

+26 −18
Original line number Diff line number Diff line
@@ -19,7 +19,10 @@ 


static efi_system_table_t *sys_table;



struct efi_config *efi_early;

static struct efi_config *efi_early;



#define efi_call_early(f, ...)						\

	efi_early->call(efi_early->f, __VA_ARGS__);



#define BOOT_SERVICES(bits)						\

static void setup_boot_services##bits(struct efi_config *c)		\
@@ -265,21 +268,25 @@ void efi_char16_printk(efi_system_table_t *table, efi_char16_t *str) 


		offset = offsetof(typeof(*out), output_string);

		output_string = efi_early->text_output + offset;

		out = (typeof(out))(unsigned long)efi_early->text_output;

		func = (u64 *)output_string;



		efi_early->call(*func, efi_early->text_output, str);

		efi_early->call(*func, out, str);

	} else {

		struct efi_simple_text_output_protocol_32 *out;

		u32 *func;



		offset = offsetof(typeof(*out), output_string);

		output_string = efi_early->text_output + offset;

		out = (typeof(out))(unsigned long)efi_early->text_output;

		func = (u32 *)output_string;



		efi_early->call(*func, efi_early->text_output, str);

		efi_early->call(*func, out, str);

	}

}



#include "../../../../drivers/firmware/efi/libstub/efi-stub-helper.c"



static void find_bits(unsigned long mask, u8 *pos, u8 *size)

{

	u8 first, len;
@@ -360,7 +367,7 @@ free_struct: 
	return status;

}



static efi_status_t

static void

setup_efi_pci32(struct boot_params *params, void **pci_handle,

		unsigned long size)

{
@@ -403,8 +410,6 @@ setup_efi_pci32(struct boot_params *params, void **pci_handle, 
		data = (struct setup_data *)rom;



	}



	return status;

}



static efi_status_t
@@ -463,7 +468,7 @@ free_struct: 


}



static efi_status_t

static void

setup_efi_pci64(struct boot_params *params, void **pci_handle,

		unsigned long size)

{
@@ -506,11 +511,18 @@ setup_efi_pci64(struct boot_params *params, void **pci_handle, 
		data = (struct setup_data *)rom;



	}



	return status;

}



static efi_status_t setup_efi_pci(struct boot_params *params)

/*

 * There's no way to return an informative status from this function,

 * because any analysis (and printing of error messages) needs to be

 * done directly at the EFI function call-site.

 *

 * For example, EFI_INVALID_PARAMETER could indicate a bug or maybe we

 * just didn't find any PCI devices, but there's no way to tell outside

 * the context of the call.

 */

static void setup_efi_pci(struct boot_params *params)

{

	efi_status_t status;

	void **pci_handle = NULL;
@@ -527,7 +539,7 @@ static efi_status_t setup_efi_pci(struct boot_params *params) 
					size, (void **)&pci_handle);



		if (status != EFI_SUCCESS)

			return status;

			return;



		status = efi_call_early(locate_handle,

					EFI_LOCATE_BY_PROTOCOL, &pci_proto,
@@ -538,13 +550,12 @@ static efi_status_t setup_efi_pci(struct boot_params *params) 
		goto free_handle;



	if (efi_early->is64)

		status = setup_efi_pci64(params, pci_handle, size);

		setup_efi_pci64(params, pci_handle, size);

	else

		status = setup_efi_pci32(params, pci_handle, size);

		setup_efi_pci32(params, pci_handle, size);



free_handle:

	efi_call_early(free_pool, pci_handle);

	return status;

}



static void
@@ -1380,10 +1391,7 @@ struct boot_params *efi_main(struct efi_config *c, 


	setup_graphics(boot_params);



	status = setup_efi_pci(boot_params);

	if (status != EFI_SUCCESS) {

		efi_printk(sys_table, "setup_efi_pci() failed!\n");

	}

	setup_efi_pci(boot_params);



	status = efi_call_early(allocate_pool, EFI_LOADER_DATA,

				sizeof(*gdt), (void **)&gdt);

arch/x86/boot/compressed/eboot.h

+16 −0
Original line number Diff line number Diff line
@@ -103,4 +103,20 @@ struct efi_uga_draw_protocol { 
	void *blt;

};



struct efi_config {

	u64 image_handle;

	u64 table;

	u64 allocate_pool;

	u64 allocate_pages;

	u64 get_memory_map;

	u64 free_pool;

	u64 free_pages;

	u64 locate_handle;

	u64 handle_protocol;

	u64 exit_boot_services;

	u64 text_output;

	efi_status_t (*call)(unsigned long, ...);

	bool is64;

} __packed;



#endif /* BOOT_COMPRESSED_EBOOT_H */

arch/x86/include/asm/efi.h

+0 −24
Original line number Diff line number Diff line
@@ -159,30 +159,6 @@ static inline efi_status_t efi_thunk_set_virtual_address_map( 
}

#endif /* CONFIG_EFI_MIXED */





/* arch specific definitions used by the stub code */



struct efi_config {

	u64 image_handle;

	u64 table;

	u64 allocate_pool;

	u64 allocate_pages;

	u64 get_memory_map;

	u64 free_pool;

	u64 free_pages;

	u64 locate_handle;

	u64 handle_protocol;

	u64 exit_boot_services;

	u64 text_output;

	efi_status_t (*call)(unsigned long, ...);

	bool is64;

} __packed;



extern struct efi_config *efi_early;



#define efi_call_early(f, ...)						\

	efi_early->call(efi_early->f, __VA_ARGS__);



extern bool efi_reboot_required(void);



#else