[linux-block.git] / arch / x86 / include / asm / efi.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_X86_EFI_H
#define _ASM_X86_EFI_H

#include <asm/fpu/api.h>
#include <asm/processor-flags.h>
#include <asm/tlb.h>
#include <asm/nospec-branch.h>
#include <asm/mmu_context.h>
#include <linux/build_bug.h>
#include <linux/kernel.h>
#include <linux/pgtable.h>

extern unsigned long efi_fw_vendor, efi_config_table;

/*
 * We map the EFI regions needed for runtime services non-contiguously,
 * with preserved alignment on virtual addresses starting from -4G down
 * for a total max space of 64G. This way, we provide for stable runtime
 * services addresses across kernels so that a kexec'd kernel can still
 * use them.
 *
 * This is the main reason why we're doing stable VA mappings for RT
 * services.
 */

#define EFI32_LOADER_SIGNATURE	"EL32"
#define EFI64_LOADER_SIGNATURE	"EL64"

#define ARCH_EFI_IRQ_FLAGS_MASK	X86_EFLAGS_IF

/*
 * The EFI services are called through variadic functions in many cases. These
 * functions are implemented in assembler and support only a fixed number of
 * arguments. The macros below allows us to check at build time that we don't
 * try to call them with too many arguments.
 *
 * __efi_nargs() will return the number of arguments if it is 7 or less, and
 * cause a BUILD_BUG otherwise. The limitations of the C preprocessor make it
 * impossible to calculate the exact number of arguments beyond some
 * pre-defined limit. The maximum number of arguments currently supported by
 * any of the thunks is 7, so this is good enough for now and can be extended
 * in the obvious way if we ever need more.
 */

#define __efi_nargs(...) __efi_nargs_(__VA_ARGS__)
#define __efi_nargs_(...) __efi_nargs__(0, ##__VA_ARGS__,	\
	__efi_arg_sentinel(7), __efi_arg_sentinel(6),		\
	__efi_arg_sentinel(5), __efi_arg_sentinel(4),		\
	__efi_arg_sentinel(3), __efi_arg_sentinel(2),		\
	__efi_arg_sentinel(1), __efi_arg_sentinel(0))
#define __efi_nargs__(_0, _1, _2, _3, _4, _5, _6, _7, n, ...)	\
	__take_second_arg(n,					\
		({ BUILD_BUG_ON_MSG(1, "__efi_nargs limit exceeded"); 8; }))
#define __efi_arg_sentinel(n) , n

/*
 * __efi_nargs_check(f, n, ...) will cause a BUILD_BUG if the ellipsis
 * represents more than n arguments.
 */

#define __efi_nargs_check(f, n, ...)					\
	__efi_nargs_check_(f, __efi_nargs(__VA_ARGS__), n)
#define __efi_nargs_check_(f, p, n) __efi_nargs_check__(f, p, n)
#define __efi_nargs_check__(f, p, n) ({					\
	BUILD_BUG_ON_MSG(						\
		(p) > (n),						\
		#f " called with too many arguments (" #p ">" #n ")");	\
})

#ifdef CONFIG_X86_32
#define arch_efi_call_virt_setup()					\
({									\
	kernel_fpu_begin();						\
	firmware_restrict_branch_speculation_start();			\
})

#define arch_efi_call_virt_teardown()					\
({									\
	firmware_restrict_branch_speculation_end();			\
	kernel_fpu_end();						\
})

#define arch_efi_call_virt(p, f, args...)	p->f(args)

#else /* !CONFIG_X86_32 */

#define EFI_LOADER_SIGNATURE	"EL64"

extern asmlinkage u64 __efi_call(void *fp, ...);

#define efi_call(...) ({						\
	__efi_nargs_check(efi_call, 7, __VA_ARGS__);			\
	__efi_call(__VA_ARGS__);					\
})

/*
 * struct efi_scratch - Scratch space used while switching to/from efi_mm
 * @phys_stack: stack used during EFI Mixed Mode
 * @prev_mm:    store/restore stolen mm_struct while switching to/from efi_mm
 */
struct efi_scratch {
	u64			phys_stack;
	struct mm_struct	*prev_mm;
} __packed;

#define arch_efi_call_virt_setup()					\
({									\
	efi_sync_low_kernel_mappings();					\
	kernel_fpu_begin();						\
	firmware_restrict_branch_speculation_start();			\
	efi_switch_mm(&efi_mm);						\
})

#define arch_efi_call_virt(p, f, args...)				\
	efi_call((void *)p->f, args)					\

#define arch_efi_call_virt_teardown()					\
({									\
	efi_switch_mm(efi_scratch.prev_mm);				\
	firmware_restrict_branch_speculation_end();			\
	kernel_fpu_end();						\
})

#ifdef CONFIG_KASAN
/*
 * CONFIG_KASAN may redefine memset to __memset.  __memset function is present
 * only in kernel binary.  Since the EFI stub linked into a separate binary it
 * doesn't have __memset().  So we should use standard memset from
 * arch/x86/boot/compressed/string.c.  The same applies to memcpy and memmove.
 */
#undef memcpy
#undef memset
#undef memmove
#endif

#endif /* CONFIG_X86_32 */

extern struct efi_scratch efi_scratch;
extern int __init efi_memblock_x86_reserve_range(void);
extern void __init efi_print_memmap(void);
extern void __init efi_map_region(efi_memory_desc_t *md);
extern void __init efi_map_region_fixed(efi_memory_desc_t *md);
extern void efi_sync_low_kernel_mappings(void);
extern int __init efi_alloc_page_tables(void);
extern int __init efi_setup_page_tables(unsigned long pa_memmap, unsigned num_pages);
extern void __init efi_runtime_update_mappings(void);
extern void __init efi_dump_pagetable(void);
extern void __init efi_apply_memmap_quirks(void);
extern int __init efi_reuse_config(u64 tables, int nr_tables);
extern void efi_delete_dummy_variable(void);
extern void efi_switch_mm(struct mm_struct *mm);
extern void efi_recover_from_page_fault(unsigned long phys_addr);
extern void efi_free_boot_services(void);

/* kexec external ABI */
struct efi_setup_data {
	u64 fw_vendor;
	u64 __unused;
	u64 tables;
	u64 smbios;
	u64 reserved[8];
};

extern u64 efi_setup;

#ifdef CONFIG_EFI
extern efi_status_t __efi64_thunk(u32, ...);

#define efi64_thunk(...) ({						\
	__efi_nargs_check(efi64_thunk, 6, __VA_ARGS__);			\
	__efi64_thunk(__VA_ARGS__);					\
})

static inline bool efi_is_mixed(void)
{
	if (!IS_ENABLED(CONFIG_EFI_MIXED))
		return false;
	return IS_ENABLED(CONFIG_X86_64) && !efi_enabled(EFI_64BIT);
}

static inline bool efi_runtime_supported(void)
{
	if (IS_ENABLED(CONFIG_X86_64) == efi_enabled(EFI_64BIT))
		return true;

	return IS_ENABLED(CONFIG_EFI_MIXED);
}

extern void parse_efi_setup(u64 phys_addr, u32 data_len);

extern void efifb_setup_from_dmi(struct screen_info *si, const char *opt);

extern void efi_thunk_runtime_setup(void);
efi_status_t efi_set_virtual_address_map(unsigned long memory_map_size,
					 unsigned long descriptor_size,
					 u32 descriptor_version,
					 efi_memory_desc_t *virtual_map,
					 unsigned long systab_phys);

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

#ifdef CONFIG_EFI_MIXED

#define ARCH_HAS_EFISTUB_WRAPPERS

static inline bool efi_is_64bit(void)
{
	extern const bool efi_is64;

	return efi_is64;
}

static inline bool efi_is_native(void)
{
	return efi_is_64bit();
}

#define efi_mixed_mode_cast(attr)					\
	__builtin_choose_expr(						\
		__builtin_types_compatible_p(u32, __typeof__(attr)),	\
			(unsigned long)(attr), (attr))

#define efi_table_attr(inst, attr)					\
	(efi_is_native()						\
		? inst->attr						\
		: (__typeof__(inst->attr))				\
			efi_mixed_mode_cast(inst->mixed_mode.attr))

/*
 * The following macros allow translating arguments if necessary from native to
 * mixed mode. The use case for this is to initialize the upper 32 bits of
 * output parameters, and where the 32-bit method requires a 64-bit argument,
 * which must be split up into two arguments to be thunked properly.
 *
 * As examples, the AllocatePool boot service returns the address of the
 * allocation, but it will not set the high 32 bits of the address. To ensure
 * that the full 64-bit address is initialized, we zero-init the address before
 * calling the thunk.
 *
 * The FreePages boot service takes a 64-bit physical address even in 32-bit
 * mode. For the thunk to work correctly, a native 64-bit call of
 * 	free_pages(addr, size)
 * must be translated to
 * 	efi64_thunk(free_pages, addr & U32_MAX, addr >> 32, size)
 * so that the two 32-bit halves of addr get pushed onto the stack separately.
 */

static inline void *efi64_zero_upper(void *p)
{
	((u32 *)p)[1] = 0;
	return p;
}

static inline u32 efi64_convert_status(efi_status_t status)
{
	return (u32)(status | (u64)status >> 32);
}

#define __efi64_argmap_free_pages(addr, size)				\
	((addr), 0, (size))

#define __efi64_argmap_get_memory_map(mm_size, mm, key, size, ver)	\
	((mm_size), (mm), efi64_zero_upper(key), efi64_zero_upper(size), (ver))

#define __efi64_argmap_allocate_pool(type, size, buffer)		\
	((type), (size), efi64_zero_upper(buffer))

#define __efi64_argmap_create_event(type, tpl, f, c, event)		\
	((type), (tpl), (f), (c), efi64_zero_upper(event))

#define __efi64_argmap_set_timer(event, type, time)			\
	((event), (type), lower_32_bits(time), upper_32_bits(time))

#define __efi64_argmap_wait_for_event(num, event, index)		\
	((num), (event), efi64_zero_upper(index))

#define __efi64_argmap_handle_protocol(handle, protocol, interface)	\
	((handle), (protocol), efi64_zero_upper(interface))

#define __efi64_argmap_locate_protocol(protocol, reg, interface)	\
	((protocol), (reg), efi64_zero_upper(interface))

#define __efi64_argmap_locate_device_path(protocol, path, handle)	\
	((protocol), (path), efi64_zero_upper(handle))

#define __efi64_argmap_exit(handle, status, size, data)			\
	((handle), efi64_convert_status(status), (size), (data))

/* PCI I/O */
#define __efi64_argmap_get_location(protocol, seg, bus, dev, func)	\
	((protocol), efi64_zero_upper(seg), efi64_zero_upper(bus),	\
	 efi64_zero_upper(dev), efi64_zero_upper(func))

/* LoadFile */
#define __efi64_argmap_load_file(protocol, path, policy, bufsize, buf)	\
	((protocol), (path), (policy), efi64_zero_upper(bufsize), (buf))

/* Graphics Output Protocol */
#define __efi64_argmap_query_mode(gop, mode, size, info)		\
	((gop), (mode), efi64_zero_upper(size), efi64_zero_upper(info))

/*
 * The macros below handle the plumbing for the argument mapping. To add a
 * mapping for a specific EFI method, simply define a macro
 * __efi64_argmap_<method name>, following the examples above.
 */

#define __efi64_thunk_map(inst, func, ...)				\
	efi64_thunk(inst->mixed_mode.func,				\
		__efi64_argmap(__efi64_argmap_ ## func(__VA_ARGS__),	\
			       (__VA_ARGS__)))

#define __efi64_argmap(mapped, args)					\
	__PASTE(__efi64_argmap__, __efi_nargs(__efi_eat mapped))(mapped, args)
#define __efi64_argmap__0(mapped, args) __efi_eval mapped
#define __efi64_argmap__1(mapped, args) __efi_eval args

#define __efi_eat(...)
#define __efi_eval(...) __VA_ARGS__

/* The three macros below handle dispatching via the thunk if needed */

#define efi_call_proto(inst, func, ...)					\
	(efi_is_native()						\
		? inst->func(inst, ##__VA_ARGS__)			\
		: __efi64_thunk_map(inst, func, inst, ##__VA_ARGS__))

#define efi_bs_call(func, ...)						\
	(efi_is_native()						\
		? efi_system_table->boottime->func(__VA_ARGS__)		\
		: __efi64_thunk_map(efi_table_attr(efi_system_table,	\
						   boottime),		\
				    func, __VA_ARGS__))

#define efi_rt_call(func, ...)						\
	(efi_is_native()						\
		? efi_system_table->runtime->func(__VA_ARGS__)		\
		: __efi64_thunk_map(efi_table_attr(efi_system_table,	\
						   runtime),		\
				    func, __VA_ARGS__))

#else /* CONFIG_EFI_MIXED */

static inline bool efi_is_64bit(void)
{
	return IS_ENABLED(CONFIG_X86_64);
}

#endif /* CONFIG_EFI_MIXED */

extern bool efi_reboot_required(void);
extern bool efi_is_table_address(unsigned long phys_addr);

extern void efi_find_mirror(void);
extern void efi_reserve_boot_services(void);
#else
static inline void parse_efi_setup(u64 phys_addr, u32 data_len) {}
static inline bool efi_reboot_required(void)
{
	return false;
}
static inline  bool efi_is_table_address(unsigned long phys_addr)
{
	return false;
}
static inline void efi_find_mirror(void)
{
}
static inline void efi_reserve_boot_services(void)
{
}
#endif /* CONFIG_EFI */

#ifdef CONFIG_EFI_FAKE_MEMMAP
extern void __init efi_fake_memmap_early(void);
#else
static inline void efi_fake_memmap_early(void)
{
}
#endif

#define arch_ima_efi_boot_mode	\
	({ extern struct boot_params boot_params; boot_params.secure_boot; })

#endif /* _ASM_X86_EFI_H */
Commit	Line	Data
b2441318	1	/* SPDX-License-Identifier: GPL-2.0 */
1965aae3 PA	2	#ifndef _ASM_X86_EFI_H
1965aae3 PA	3	#define _ASM_X86_EFI_H
5b83683f	4
df6b35f4	5	#include <asm/fpu/api.h>
9788375d	6	#include <asm/processor-flags.h>
c9f2a9a6	7	#include <asm/tlb.h>
dd84441a	8	#include <asm/nospec-branch.h>
7e904a91	9	#include <asm/mmu_context.h>
14b864f4	10	#include <linux/build_bug.h>
9b47c527	11	#include <linux/kernel.h>
65fddcfc	12	#include <linux/pgtable.h>
744937b0	13
9cd437ac AB	14	extern unsigned long efi_fw_vendor, efi_config_table;
9cd437ac AB	15
d2f7cbe7 BP	16	/*
	17	* We map the EFI regions needed for runtime services non-contiguously,
	18	* with preserved alignment on virtual addresses starting from -4G down
	19	* for a total max space of 64G. This way, we provide for stable runtime
	20	* services addresses across kernels so that a kexec'd kernel can still
	21	* use them.
	22	*
	23	* This is the main reason why we're doing stable VA mappings for RT
	24	* services.
d2f7cbe7	25	*/
d2f7cbe7	26
b8ff87a6 MF	27	#define EFI32_LOADER_SIGNATURE "EL32"
	28	#define EFI64_LOADER_SIGNATURE "EL64"
	29
9788375d	30	#define ARCH_EFI_IRQ_FLAGS_MASK X86_EFLAGS_IF
e429795c	31
14b864f4 AS	32	/*
	33	* The EFI services are called through variadic functions in many cases. These
	34	* functions are implemented in assembler and support only a fixed number of
	35	* arguments. The macros below allows us to check at build time that we don't
	36	* try to call them with too many arguments.
	37	*
	38	* __efi_nargs() will return the number of arguments if it is 7 or less, and
	39	* cause a BUILD_BUG otherwise. The limitations of the C preprocessor make it
	40	* impossible to calculate the exact number of arguments beyond some
	41	* pre-defined limit. The maximum number of arguments currently supported by
	42	* any of the thunks is 7, so this is good enough for now and can be extended
	43	* in the obvious way if we ever need more.
	44	*/
	45
	46	#define __efi_nargs(...) __efi_nargs_(__VA_ARGS__)
	47	#define __efi_nargs_(...) __efi_nargs__(0, ##__VA_ARGS__, \
	48	__efi_arg_sentinel(7), __efi_arg_sentinel(6), \
	49	__efi_arg_sentinel(5), __efi_arg_sentinel(4), \
	50	__efi_arg_sentinel(3), __efi_arg_sentinel(2), \
	51	__efi_arg_sentinel(1), __efi_arg_sentinel(0))
	52	#define __efi_nargs__(_0, _1, _2, _3, _4, _5, _6, _7, n, ...) \
	53	__take_second_arg(n, \
	54	({ BUILD_BUG_ON_MSG(1, "__efi_nargs limit exceeded"); 8; }))
	55	#define __efi_arg_sentinel(n) , n
	56
	57	/*
	58	* __efi_nargs_check(f, n, ...) will cause a BUILD_BUG if the ellipsis
	59	* represents more than n arguments.
	60	*/
	61
	62	#define __efi_nargs_check(f, n, ...) \
	63	__efi_nargs_check_(f, __efi_nargs(__VA_ARGS__), n)
	64	#define __efi_nargs_check_(f, p, n) __efi_nargs_check__(f, p, n)
	65	#define __efi_nargs_check__(f, p, n) ({ \
	66	BUILD_BUG_ON_MSG( \
	67	(p) > (n), \
	68	#f " called with too many arguments (" #p ">" #n ")"); \
	69	})
	70
9788375d	71	#ifdef CONFIG_X86_32
dd84441a DW	72	#define arch_efi_call_virt_setup() \
	73	({ \
	74	kernel_fpu_begin(); \
	75	firmware_restrict_branch_speculation_start(); \
	76	})
	77
	78	#define arch_efi_call_virt_teardown() \
	79	({ \
	80	firmware_restrict_branch_speculation_end(); \
	81	kernel_fpu_end(); \
	82	})
	83
89ed4865	84	#define arch_efi_call_virt(p, f, args...) p->f(args)
982e239c	85
5b83683f HY	86	#else /* !CONFIG_X86_32 */
5b83683f HY	87
62fa6e69 MF	88	#define EFI_LOADER_SIGNATURE "EL64"
62fa6e69 MF	89
14b864f4 AS	90	extern asmlinkage u64 __efi_call(void *fp, ...);
	91
	92	#define efi_call(...) ({ \
	93	__efi_nargs_check(efi_call, 7, __VA_ARGS__); \
	94	__efi_call(__VA_ARGS__); \
	95	})
62fa6e69	96
c9f2a9a6	97	/*
03781e40 SP	98	* struct efi_scratch - Scratch space used while switching to/from efi_mm
	99	* @phys_stack: stack used during EFI Mixed Mode
	100	* @prev_mm: store/restore stolen mm_struct while switching to/from efi_mm
c9f2a9a6 MF	101	*/
c9f2a9a6 MF	102	struct efi_scratch {
03781e40 SP	103	u64 phys_stack;
03781e40 SP	104	struct mm_struct *prev_mm;
c9f2a9a6 MF	105	} __packed;
c9f2a9a6 MF	106
bc25f9db	107	#define arch_efi_call_virt_setup() \
d2f7cbe7	108	({ \
d2f7cbe7	109	efi_sync_low_kernel_mappings(); \
12209993	110	kernel_fpu_begin(); \
dd84441a	111	firmware_restrict_branch_speculation_start(); \
3bcf25a4	112	efi_switch_mm(&efi_mm); \
bc25f9db MR	113	})
bc25f9db MR	114
80e75596 AT	115	#define arch_efi_call_virt(p, f, args...) \
80e75596 AT	116	efi_call((void *)p->f, args) \
bc25f9db MR	117
	118	#define arch_efi_call_virt_teardown() \
	119	({ \
3bcf25a4	120	efi_switch_mm(efi_scratch.prev_mm); \
dd84441a	121	firmware_restrict_branch_speculation_end(); \
12209993	122	kernel_fpu_end(); \
d2f7cbe7 BP	123	})
d2f7cbe7 BP	124
a523841e	125	#ifdef CONFIG_KASAN
769a8089 AR	126	/*
	127	* CONFIG_KASAN may redefine memset to __memset. __memset function is present
	128	* only in kernel binary. Since the EFI stub linked into a separate binary it
	129	* doesn't have __memset(). So we should use standard memset from
	130	* arch/x86/boot/compressed/string.c. The same applies to memcpy and memmove.
	131	*/
	132	#undef memcpy
	133	#undef memset
	134	#undef memmove
a523841e	135	#endif
769a8089	136
5b83683f HY	137	#endif /* CONFIG_X86_32 */
5b83683f HY	138
d2f7cbe7	139	extern struct efi_scratch efi_scratch;
4e78eb05	140	extern int __init efi_memblock_x86_reserve_range(void);
0bbea1ce	141	extern void __init efi_print_memmap(void);
d2f7cbe7	142	extern void __init efi_map_region(efi_memory_desc_t *md);
3b266496	143	extern void __init efi_map_region_fixed(efi_memory_desc_t *md);
d2f7cbe7	144	extern void efi_sync_low_kernel_mappings(void);
67a9108e	145	extern int __init efi_alloc_page_tables(void);
4e78eb05	146	extern int __init efi_setup_page_tables(unsigned long pa_memmap, unsigned num_pages);
6d0cc887	147	extern void __init efi_runtime_update_mappings(void);
11cc8512	148	extern void __init efi_dump_pagetable(void);
a5d90c92	149	extern void __init efi_apply_memmap_quirks(void);
eeb9db09 ST	150	extern int __init efi_reuse_config(u64 tables, int nr_tables);
eeb9db09 ST	151	extern void efi_delete_dummy_variable(void);
03781e40	152	extern void efi_switch_mm(struct mm_struct *mm);
3425d934	153	extern void efi_recover_from_page_fault(unsigned long phys_addr);
47c33a09	154	extern void efi_free_boot_services(void);
5b83683f	155
a088b858	156	/* kexec external ABI */
1fec0533 DY	157	struct efi_setup_data {
1fec0533 DY	158	u64 fw_vendor;
a088b858	159	u64 __unused;
1fec0533 DY	160	u64 tables;
	161	u64 smbios;
	162	u64 reserved[8];
	163	};
	164
	165	extern u64 efi_setup;
1fec0533	166
6b59e366	167	#ifdef CONFIG_EFI
14b864f4 AS	168	extern efi_status_t __efi64_thunk(u32, ...);
	169
	170	#define efi64_thunk(...) ({ \
	171	__efi_nargs_check(efi64_thunk, 6, __VA_ARGS__); \
	172	__efi64_thunk(__VA_ARGS__); \
	173	})
6b59e366	174
a8147dba	175	static inline bool efi_is_mixed(void)
6b59e366	176	{
a8147dba AB	177	if (!IS_ENABLED(CONFIG_EFI_MIXED))
	178	return false;
	179	return IS_ENABLED(CONFIG_X86_64) && !efi_enabled(EFI_64BIT);
6b59e366 ST	180	}
6b59e366 ST	181
7d453eee MF	182	static inline bool efi_runtime_supported(void)
7d453eee MF	183	{
6cfcd6f0	184	if (IS_ENABLED(CONFIG_X86_64) == efi_enabled(EFI_64BIT))
7d453eee MF	185	return true;
7d453eee MF	186
1f299fad	187	return IS_ENABLED(CONFIG_EFI_MIXED);
7d453eee MF	188	}
7d453eee MF	189
5c12af0c	190	extern void parse_efi_setup(u64 phys_addr, u32 data_len);
4f9dbcfc	191
21289ec0 AB	192	extern void efifb_setup_from_dmi(struct screen_info si, const char opt);
21289ec0 AB	193
4f9dbcfc	194	extern void efi_thunk_runtime_setup(void);
69829470 AB	195	efi_status_t efi_set_virtual_address_map(unsigned long memory_map_size,
	196	unsigned long descriptor_size,
	197	u32 descriptor_version,
59f2a619 AB	198	efi_memory_desc_t *virtual_map,
59f2a619 AB	199	unsigned long systab_phys);
243b6754 AB	200
	201	/* arch specific definitions used by the stub code */
	202
de8c5520 AS	203	#ifdef CONFIG_EFI_MIXED
	204
	205	#define ARCH_HAS_EFISTUB_WRAPPERS
0a755614 AB	206
	207	static inline bool efi_is_64bit(void)
	208	{
de8c5520 AS	209	extern const bool efi_is64;
	210
	211	return efi_is64;
0a755614	212	}
27571616	213
f958efe9 AB	214	static inline bool efi_is_native(void)
f958efe9 AB	215	{
f958efe9 AB	216	return efi_is_64bit();
	217	}
	218
	219	#define efi_mixed_mode_cast(attr) \
	220	__builtin_choose_expr( \
	221	__builtin_types_compatible_p(u32, __typeof__(attr)), \
	222	(unsigned long)(attr), (attr))
	223
99ea8b1d AB	224	#define efi_table_attr(inst, attr) \
	225	(efi_is_native() \
	226	? inst->attr \
	227	: (__typeof__(inst->attr)) \
	228	efi_mixed_mode_cast(inst->mixed_mode.attr))
3552fdf2	229
ea7d87f9 AS	230	/*
	231	* The following macros allow translating arguments if necessary from native to
	232	* mixed mode. The use case for this is to initialize the upper 32 bits of
	233	* output parameters, and where the 32-bit method requires a 64-bit argument,
	234	* which must be split up into two arguments to be thunked properly.
	235	*
	236	* As examples, the AllocatePool boot service returns the address of the
	237	* allocation, but it will not set the high 32 bits of the address. To ensure
	238	* that the full 64-bit address is initialized, we zero-init the address before
	239	* calling the thunk.
	240	*
	241	* The FreePages boot service takes a 64-bit physical address even in 32-bit
	242	* mode. For the thunk to work correctly, a native 64-bit call of
	243	* free_pages(addr, size)
	244	* must be translated to
	245	* efi64_thunk(free_pages, addr & U32_MAX, addr >> 32, size)
	246	* so that the two 32-bit halves of addr get pushed onto the stack separately.
	247	*/
	248
	249	static inline void efi64_zero_upper(void p)
	250	{
	251	((u32 *)p)[1] = 0;
	252	return p;
	253	}
	254
3b8f44fc AB	255	static inline u32 efi64_convert_status(efi_status_t status)
	256	{
	257	return (u32)(status \| (u64)status >> 32);
	258	}
	259
ea7d87f9 AS	260	#define __efi64_argmap_free_pages(addr, size) \
	261	((addr), 0, (size))
	262
	263	#define __efi64_argmap_get_memory_map(mm_size, mm, key, size, ver) \
	264	((mm_size), (mm), efi64_zero_upper(key), efi64_zero_upper(size), (ver))
	265
	266	#define __efi64_argmap_allocate_pool(type, size, buffer) \
	267	((type), (size), efi64_zero_upper(buffer))
	268
9b47c527 AS	269	#define __efi64_argmap_create_event(type, tpl, f, c, event) \
	270	((type), (tpl), (f), (c), efi64_zero_upper(event))
	271
	272	#define __efi64_argmap_set_timer(event, type, time) \
	273	((event), (type), lower_32_bits(time), upper_32_bits(time))
	274
	275	#define __efi64_argmap_wait_for_event(num, event, index) \
	276	((num), (event), efi64_zero_upper(index))
	277
ea7d87f9 AS	278	#define __efi64_argmap_handle_protocol(handle, protocol, interface) \
	279	((handle), (protocol), efi64_zero_upper(interface))
	280
	281	#define __efi64_argmap_locate_protocol(protocol, reg, interface) \
	282	((protocol), (reg), efi64_zero_upper(interface))
	283
abd26868 AB	284	#define __efi64_argmap_locate_device_path(protocol, path, handle) \
	285	((protocol), (path), efi64_zero_upper(handle))
	286
3b8f44fc AB	287	#define __efi64_argmap_exit(handle, status, size, data) \
	288	((handle), efi64_convert_status(status), (size), (data))
	289
4444f854 MG	290	/* PCI I/O */
	291	#define __efi64_argmap_get_location(protocol, seg, bus, dev, func) \
	292	((protocol), efi64_zero_upper(seg), efi64_zero_upper(bus), \
	293	efi64_zero_upper(dev), efi64_zero_upper(func))
	294
2931d526 AB	295	/* LoadFile */
	296	#define __efi64_argmap_load_file(protocol, path, policy, bufsize, buf) \
	297	((protocol), (path), (policy), efi64_zero_upper(bufsize), (buf))
	298
b4b89a02 AS	299	/* Graphics Output Protocol */
	300	#define __efi64_argmap_query_mode(gop, mode, size, info) \
	301	((gop), (mode), efi64_zero_upper(size), efi64_zero_upper(info))
	302
ea7d87f9 AS	303	/*
	304	* The macros below handle the plumbing for the argument mapping. To add a
	305	* mapping for a specific EFI method, simply define a macro
	306	* __efi64_argmap_<method name>, following the examples above.
	307	*/
	308
	309	#define __efi64_thunk_map(inst, func, ...) \
	310	efi64_thunk(inst->mixed_mode.func, \
	311	__efi64_argmap(__efi64_argmap_ ## func(__VA_ARGS__), \
	312	(__VA_ARGS__)))
	313
	314	#define __efi64_argmap(mapped, args) \
	315	__PASTE(__efi64_argmap__, __efi_nargs(__efi_eat mapped))(mapped, args)
	316	#define __efi64_argmap__0(mapped, args) __efi_eval mapped
	317	#define __efi64_argmap__1(mapped, args) __efi_eval args
	318
	319	#define __efi_eat(...)
	320	#define __efi_eval(...) __VA_ARGS__
	321
	322	/* The three macros below handle dispatching via the thunk if needed */
	323
47c0fd39	324	#define efi_call_proto(inst, func, ...) \
afc4cc71	325	(efi_is_native() \
47c0fd39	326	? inst->func(inst, ##__VA_ARGS__) \
ea7d87f9	327	: __efi64_thunk_map(inst, func, inst, ##__VA_ARGS__))
3552fdf2	328
966291f6	329	#define efi_bs_call(func, ...) \
afc4cc71	330	(efi_is_native() \
ccc27ae7 AB	331	? efi_system_table->boottime->func(__VA_ARGS__) \
	332	: __efi64_thunk_map(efi_table_attr(efi_system_table, \
	333	boottime), \
	334	func, __VA_ARGS__))
243b6754	335
966291f6	336	#define efi_rt_call(func, ...) \
afc4cc71	337	(efi_is_native() \
ccc27ae7 AB	338	? efi_system_table->runtime->func(__VA_ARGS__) \
	339	: __efi64_thunk_map(efi_table_attr(efi_system_table, \
	340	runtime), \
	341	func, __VA_ARGS__))
a2cd2f3f	342
de8c5520 AS	343	#else /* CONFIG_EFI_MIXED */
	344
	345	static inline bool efi_is_64bit(void)
	346	{
	347	return IS_ENABLED(CONFIG_X86_64);
	348	}
	349
	350	#endif /* CONFIG_EFI_MIXED */
	351
44be28e9	352	extern bool efi_reboot_required(void);
e55f31a5	353	extern bool efi_is_table_address(unsigned long phys_addr);
44be28e9	354
6950e31b DW	355	extern void efi_find_mirror(void);
6950e31b DW	356	extern void efi_reserve_boot_services(void);
6b59e366	357	#else
5c12af0c	358	static inline void parse_efi_setup(u64 phys_addr, u32 data_len) {}
44be28e9 MF	359	static inline bool efi_reboot_required(void)
	360	{
	361	return false;
	362	}
e55f31a5 AB	363	static inline bool efi_is_table_address(unsigned long phys_addr)
	364	{
	365	return false;
	366	}
6950e31b DW	367	static inline void efi_find_mirror(void)
	368	{
	369	}
	370	static inline void efi_reserve_boot_services(void)
	371	{
	372	}
7f594232 RA	373	#endif /* CONFIG_EFI */
7f594232 RA	374
199c8471 DW	375	#ifdef CONFIG_EFI_FAKE_MEMMAP
	376	extern void __init efi_fake_memmap_early(void);
	377	#else
	378	static inline void efi_fake_memmap_early(void)
	379	{
	380	}
	381	#endif
	382
25519d68 CL	383	#define arch_ima_efi_boot_mode \
	384	({ extern struct boot_params boot_params; boot_params.secure_boot; })
	385
1965aae3	386	#endif /* _ASM_X86_EFI_H */