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Commit 994448f1 authored by Matt Fleming's avatar Matt Fleming
Browse files

Merge remote-tracking branch 'tip/x86/efi-mixed' into efi-for-mingo 

Conflicts:
	arch/x86/kernel/setup.c
	arch/x86/platform/efi/efi.c
	arch/x86/platform/efi/efi_64.c
parents 4fd69331 18c46461

arch/x86/Kconfig

+14 −0
Original line number Diff line number Diff line
@@ -1585,6 +1585,20 @@ config EFI_STUB 


	  See Documentation/efi-stub.txt for more information.



config EFI_MIXED

	bool "EFI mixed-mode support"

	depends on EFI_STUB && X86_64

	---help---

	   Enabling this feature allows a 64-bit kernel to be booted

	   on a 32-bit firmware, provided that your CPU supports 64-bit

	   mode.



	   Note that it is not possible to boot a mixed-mode enabled

	   kernel via the EFI boot stub - a bootloader that supports

	   the EFI handover protocol must be used.



	   If unsure, say N.



config SECCOMP

	def_bool y

	prompt "Enable seccomp to safely compute untrusted bytecode"

arch/x86/boot/Makefile

+1 −1
Original line number Diff line number Diff line
@@ -80,7 +80,7 @@ targets += voffset.h 
$(obj)/voffset.h: vmlinux FORCE

	$(call if_changed,voffset)



sed-zoffset := -e 's/^\([0-9a-fA-F]*\) . \(startup_32\|startup_64\|efi_pe_entry\|efi_stub_entry\|input_data\|_end\|z_.*\)$$/\#define ZO_\2 0x\1/p'

sed-zoffset := -e 's/^\([0-9a-fA-F]*\) . \(startup_32\|startup_64\|efi32_stub_entry\|efi64_stub_entry\|efi_pe_entry\|input_data\|_end\|z_.*\)$$/\#define ZO_\2 0x\1/p'



quiet_cmd_zoffset = ZOFFSET $@

      cmd_zoffset = $(NM) $< | sed -n $(sed-zoffset) > $@

arch/x86/boot/compressed/eboot.c

+816 −202

File changed.

Preview size limit exceeded, changes collapsed.

arch/x86/boot/compressed/eboot.h

+60 −0
Original line number Diff line number Diff line
@@ -37,6 +37,24 @@ struct efi_graphics_output_mode_info { 
	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;
@@ -46,6 +64,20 @@ struct efi_graphics_output_protocol_mode { 
	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;
@@ -53,10 +85,38 @@ struct efi_graphics_output_protocol { 
	struct efi_graphics_output_protocol_mode *mode;

};



struct efi_uga_draw_protocol_32 {

	u32 get_mode;

	u32 set_mode;

	u32 blt;

};



struct efi_uga_draw_protocol_64 {

	u64 get_mode;

	u64 set_mode;

	u64 blt;

};



struct efi_uga_draw_protocol {

	void *get_mode;

	void *set_mode;

	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/boot/compressed/efi_stub_64.S

+29 −0
Original line number Diff line number Diff line 
#include <asm/segment.h>

#include <asm/msr.h>

#include <asm/processor-flags.h>



#include "../../platform/efi/efi_stub_64.S"



#ifdef CONFIG_EFI_MIXED

	.code64

	.text

ENTRY(efi64_thunk)

	push	%rbp

	push	%rbx



	subq	$16, %rsp

	leaq	efi_exit32(%rip), %rax

	movl	%eax, 8(%rsp)

	leaq	efi_gdt64(%rip), %rax

	movl	%eax, 4(%rsp)

	movl	%eax, 2(%rax)		/* Fixup the gdt base address */

	leaq	efi32_boot_gdt(%rip), %rax

	movl	%eax, (%rsp)



	call	__efi64_thunk



	addq	$16, %rsp

	pop	%rbx

	pop	%rbp

	ret

ENDPROC(efi64_thunk)

#endif /* CONFIG_EFI_MIXED */