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

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

/*
 * 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.
 *
 * This flag is used in conjuction with a chicken bit called
 * "efi=old_map" which can be used as a fallback to the old runtime
 * services mapping method in case there's some b0rkage with a
 * particular EFI implementation (haha, it is hard to hold up the
 * sarcasm here...).
 */
#define EFI_OLD_MEMMAP		EFI_ARCH_1

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

#define MAX_CMDLINE_ADDRESS	UINT_MAX

#define ARCH_EFI_IRQ_FLAGS_MASK	X86_EFLAGS_IF

#ifdef CONFIG_X86_32

extern asmlinkage unsigned long efi_call_phys(void *, ...);

#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();						\
})


/*
 * Wrap all the virtual calls in a way that forces the parameters on the stack.
 */
#define arch_efi_call_virt(p, f, args...)				\
({									\
	((efi_##f##_t __attribute__((regparm(0)))*) p->f)(args);	\
})

#define efi_ioremap(addr, size, type, attr)	ioremap_cache(addr, size)

#else /* !CONFIG_X86_32 */

#define EFI_LOADER_SIGNATURE	"EL64"

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

#define efi_call_phys(f, args...)		efi_call((f), args)

/*
 * Scratch space used for switching the pagetable in the EFI stub
 */
struct efi_scratch {
	u64	r15;
	u64	prev_cr3;
	pgd_t	*efi_pgt;
	bool	use_pgd;
	u64	phys_stack;
} __packed;

#define arch_efi_call_virt_setup()					\
({									\
	efi_sync_low_kernel_mappings();					\
	preempt_disable();						\
	__kernel_fpu_begin();						\
	firmware_restrict_branch_speculation_start();			\
									\
	if (efi_scratch.use_pgd) {					\
		efi_scratch.prev_cr3 = __read_cr3();			\
		write_cr3((unsigned long)efi_scratch.efi_pgt);		\
		__flush_tlb_all();					\
	}								\
})

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

#define arch_efi_call_virt_teardown()					\
({									\
	if (efi_scratch.use_pgd) {					\
		write_cr3(efi_scratch.prev_cr3);			\
		__flush_tlb_all();					\
	}								\
									\
	firmware_restrict_branch_speculation_end();			\
	__kernel_fpu_end();						\
	preempt_enable();						\
})

extern void __iomem *__init efi_ioremap(unsigned long addr, unsigned long size,
					u32 type, u64 attribute);

#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 void __init efi_set_executable(efi_memory_desc_t *md, bool executable);
extern int __init efi_memblock_x86_reserve_range(void);
extern pgd_t * __init efi_call_phys_prolog(void);
extern void __init efi_call_phys_epilog(pgd_t *save_pgd);
extern void __init efi_print_memmap(void);
extern void __init efi_memory_uc(u64 addr, unsigned long size);
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 old_map_region(efi_memory_desc_t *md);
extern void __init runtime_code_page_mkexec(void);
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);

struct efi_setup_data {
	u64 fw_vendor;
	u64 runtime;
	u64 tables;
	u64 smbios;
	u64 reserved[8];
};

extern u64 efi_setup;

#ifdef CONFIG_EFI

static inline bool efi_is_native(void)
{
	return IS_ENABLED(CONFIG_X86_64) == efi_enabled(EFI_64BIT);
}

static inline bool efi_runtime_supported(void)
{
	if (efi_is_native())
		return true;

	if (IS_ENABLED(CONFIG_EFI_MIXED) && !efi_enabled(EFI_OLD_MEMMAP))
		return true;

	return false;
}

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(
	void *phys_set_virtual_address_map,
	unsigned long memory_map_size,
	unsigned long descriptor_size,
	u32 descriptor_version,
	efi_memory_desc_t *virtual_map);
#else
static inline void efi_thunk_runtime_setup(void) {}
static inline efi_status_t efi_thunk_set_virtual_address_map(
	void *phys_set_virtual_address_map,
	unsigned long memory_map_size,
	unsigned long descriptor_size,
	u32 descriptor_version,
	efi_memory_desc_t *virtual_map)
{
	return EFI_SUCCESS;
}
#endif /* CONFIG_EFI_MIXED */


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

struct efi_config {
	u64 image_handle;
	u64 table;
	u64 runtime_services;
	u64 boot_services;
	u64 text_output;
	efi_status_t (*call)(unsigned long, ...);
	bool is64;
} __packed;

__pure const struct efi_config *__efi_early(void);

static inline bool efi_is_64bit(void)
{
	if (!IS_ENABLED(CONFIG_X86_64))
		return false;

	if (!IS_ENABLED(CONFIG_EFI_MIXED))
		return true;

	return __efi_early()->is64;
}

#define efi_table_attr(table, attr, instance)				\
	(efi_is_64bit() ?						\
		((table##_64_t *)(unsigned long)instance)->attr :	\
		((table##_32_t *)(unsigned long)instance)->attr)

#define efi_call_proto(protocol, f, instance, ...)			\
	__efi_early()->call(efi_table_attr(protocol, f, instance),	\
		instance, ##__VA_ARGS__)

#define efi_call_early(f, ...)						\
	__efi_early()->call(efi_table_attr(efi_boot_services, f,	\
		__efi_early()->boot_services), __VA_ARGS__)

#define __efi_call_early(f, ...)					\
	__efi_early()->call((unsigned long)f, __VA_ARGS__);

#define efi_call_runtime(f, ...)					\
	__efi_early()->call(efi_table_attr(efi_runtime_services, f,	\
		__efi_early()->runtime_services), __VA_ARGS__)

extern bool efi_reboot_required(void);

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

#endif /* _ASM_X86_EFI_H */

Filemanager

Name Type Size Permission Actions
crypto Folder 0755
e820 Folder 0755
fpu Folder 0755
numachip Folder 0755
trace Folder 0755
uv Folder 0755
xen Folder 0755
Kbuild File 294 B 0644
a.out-core.h File 1.89 KB 0644
acenv.h File 1.56 KB 0644
acpi.h File 4.76 KB 0644
agp.h File 1.04 KB 0644
alternative-asm.h File 2.43 KB 0644
alternative.h File 8.28 KB 0644
amd_nb.h File 2.98 KB 0644
apb_timer.h File 1.43 KB 0644
apic.h File 14.53 KB 0644
apic_flat_64.h File 151 B 0644
apicdef.h File 11.26 KB 0644
apm.h File 1.8 KB 0644
arch_hweight.h File 1.28 KB 0644
archrandom.h File 3.03 KB 0644
asm-offsets.h File 35 B 0644
asm-prototypes.h File 946 B 0644
asm.h File 4.97 KB 0644
atomic.h File 6.02 KB 0644
atomic64_32.h File 8.71 KB 0644
atomic64_64.h File 6.31 KB 0644
barrier.h File 3.6 KB 0644
bios_ebda.h File 914 B 0644
bitops.h File 13.78 KB 0644
boot.h File 1.53 KB 0644
bootparam_utils.h File 2.86 KB 0644
bug.h File 2.07 KB 0644
bugs.h File 493 B 0644
cache.h File 641 B 0644
cacheflush.h File 306 B 0644
cacheinfo.h File 209 B 0644
calgary.h File 2.31 KB 0644
ce4100.h File 121 B 0644
checksum.h File 133 B 0644
checksum_32.h File 4.86 KB 0644
checksum_64.h File 5.41 KB 0644
clocksource.h File 488 B 0644
cmdline.h File 302 B 0644
cmpxchg.h File 7.68 KB 0644
cmpxchg_32.h File 3.15 KB 0644
cmpxchg_64.h File 543 B 0644
compat.h File 7.37 KB 0644
cpu.h File 975 B 0644
cpu_device_id.h File 7.39 KB 0644
cpu_entry_area.h File 2.27 KB 0644
cpufeature.h File 7.75 KB 0644
cpufeatures.h File 25.59 KB 0644
cpumask.h File 408 B 0644
crash.h File 320 B 0644
current.h File 443 B 0644
debugreg.h File 2.67 KB 0644
delay.h File 208 B 0644
desc.h File 11.42 KB 0644
desc_defs.h File 3.16 KB 0644
device.h File 568 B 0644
disabled-features.h File 2.31 KB 0644
div64.h File 1.79 KB 0644
dma-mapping.h File 2.4 KB 0644
dma.h File 9.58 KB 0644
dmi.h File 556 B 0644
dwarf2.h File 2.43 KB 0644
edac.h File 474 B 0644
efi.h File 6.9 KB 0644
elf.h File 10.82 KB 0644
emergency-restart.h File 202 B 0644
entry_arch.h File 1.88 KB 0644
espfix.h File 426 B 0644
exec.h File 37 B 0644
export.h File 120 B 0644
extable.h File 1.27 KB 0644
fb.h File 540 B 0644
fixmap.h File 6.04 KB 0644
floppy.h File 6.59 KB 0644
frame.h File 815 B 0644
ftrace.h File 1.8 KB 0644
futex.h File 2.2 KB 0644
gart.h File 2.64 KB 0644
genapic.h File 22 B 0644
geode.h File 842 B 0644
hardirq.h File 2.3 KB 0644
highmem.h File 2.6 KB 0644
hpet.h File 3.38 KB 0644
hugetlb.h File 2.15 KB 0644
hw_breakpoint.h File 1.96 KB 0644
hw_irq.h File 3.85 KB 0644
hypervisor.h File 1.84 KB 0644
i8259.h File 1.93 KB 0644
ia32.h File 1.46 KB 0644
ia32_unistd.h File 313 B 0644
imr.h File 1.81 KB 0644
inat.h File 6.58 KB 0644
inat_types.h File 1013 B 0644
init.h File 632 B 0644
insn-eval.h File 837 B 0644
insn.h File 7.46 KB 0644
inst.h File 5.07 KB 0644
intel-family.h File 3.47 KB 0644
intel-mid.h File 4.91 KB 0644
intel_ds.h File 793 B 0644
intel_mid_vrtc.h File 326 B 0644
intel_pmc_ipc.h File 2.08 KB 0644
intel_pt.h File 292 B 0644
intel_punit_ipc.h File 4.56 KB 0644
intel_rdt_sched.h File 2.59 KB 0644
intel_scu_ipc.h File 2.3 KB 0644
intel_telemetry.h File 3.96 KB 0644
invpcid.h File 1.57 KB 0644
io.h File 12.21 KB 0644
io_apic.h File 5.63 KB 0644
iomap.h File 1.22 KB 0644
iommu.h File 392 B 0644
iommu_table.h File 3.82 KB 0644
iosf_mbi.h File 5.74 KB 0644
ipi.h File 2.84 KB 0644
irq.h File 1.12 KB 0644
irq_regs.h File 679 B 0644
irq_remapping.h File 2.96 KB 0644
irq_vectors.h File 4.12 KB 0644
irq_work.h File 397 B 0644
irqdomain.h File 1.61 KB 0644
irqflags.h File 4.38 KB 0644
ist.h File 735 B 0644
jump_label.h File 2.44 KB 0644
kasan.h File 966 B 0644
kaslr.h File 424 B 0644
kbdleds.h File 454 B 0644
kdebug.h File 752 B 0644
kexec-bzimage64.h File 189 B 0644
kexec.h File 6.69 KB 0644
kgdb.h File 2.09 KB 0644
kmap_types.h File 289 B 0644
kprobes.h File 3.82 KB 0644
kvm_emulate.h File 15.23 KB 0644
kvm_guest.h File 172 B 0644
kvm_host.h File 42.72 KB 0644
kvm_page_track.h File 2.48 KB 0644
kvm_para.h File 3 KB 0644
kvmclock.h File 170 B 0644
linkage.h File 581 B 0644
livepatch.h File 1.12 KB 0644
local.h File 3.83 KB 0644
local64.h File 33 B 0644
mach_timer.h File 1.55 KB 0644
mach_traps.h File 1013 B 0644
math_emu.h File 395 B 0644
mc146818rtc.h File 2.76 KB 0644
mce.h File 12.54 KB 0644
mem_encrypt.h File 2.83 KB 0644
microcode.h File 4.14 KB 0644
microcode_amd.h File 1.41 KB 0644
microcode_intel.h File 2.46 KB 0644
misc.h File 143 B 0644
mmconfig.h File 374 B 0644
mmu.h File 1.57 KB 0644
mmu_context.h File 10.27 KB 0644
mmx.h File 337 B 0644
mmzone.h File 129 B 0644
mmzone_32.h File 1.16 KB 0644
mmzone_64.h File 430 B 0644
module.h File 2.05 KB 0644
mpspec.h File 3.93 KB 0644
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mpx.h File 2.97 KB 0644
mshyperv.h File 10.69 KB 0644
msi.h File 392 B 0644
msidef.h File 1.77 KB 0644
msr-index.h File 30.92 KB 0644
msr-trace.h File 1.35 KB 0644
msr.h File 10.85 KB 0644
mtrr.h File 4.62 KB 0644
mwait.h File 3.74 KB 0644
nmi.h File 1.39 KB 0644
nops.h File 4.31 KB 0644
nospec-branch.h File 11.49 KB 0644
numa.h File 2.18 KB 0644
numa_32.h File 256 B 0644
olpc.h File 3.16 KB 0644
olpc_ofw.h File 1.1 KB 0644
orc_lookup.h File 1.63 KB 0644
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page.h File 2.18 KB 0644
page_32.h File 1.01 KB 0644
page_32_types.h File 1.7 KB 0644
page_64.h File 1.42 KB 0644
page_64_types.h File 2.34 KB 0644
page_types.h File 2.29 KB 0644
paravirt.h File 23.31 KB 0644
paravirt_types.h File 22.15 KB 0644
parport.h File 314 B 0644
pat.h File 768 B 0644
pci-direct.h File 995 B 0644
pci-functions.h File 654 B 0644
pci.h File 3.51 KB 0644
pci_64.h File 684 B 0644
pci_x86.h File 5.71 KB 0644
percpu.h File 18.97 KB 0644
perf_event.h File 8.82 KB 0644
perf_event_p4.h File 26.1 KB 0644
pgalloc.h File 5.57 KB 0644
pgtable-2level.h File 2.75 KB 0644
pgtable-2level_types.h File 867 B 0644
pgtable-3level.h File 10.24 KB 0644
pgtable-3level_types.h File 1.06 KB 0644
pgtable-invert.h File 1.07 KB 0644
pgtable.h File 33.91 KB 0644
pgtable_32.h File 3.1 KB 0644
pgtable_32_types.h File 2.01 KB 0644
pgtable_64.h File 7.37 KB 0644
pgtable_64_types.h File 3.67 KB 0644
pgtable_types.h File 16.75 KB 0644
pkeys.h File 3.17 KB 0644
platform_sst_audio.h File 3.18 KB 0644
pm-trace.h File 611 B 0644
posix_types.h File 144 B 0644
preempt.h File 3.04 KB 0644
probe_roms.h File 273 B 0644
processor-cyrix.h File 879 B 0644
processor-flags.h File 1.71 KB 0644
processor.h File 24.54 KB 0644
prom.h File 1 KB 0644
proto.h File 1003 B 0644
pti.h File 369 B 0644
ptrace.h File 8.52 KB 0644
purgatory.h File 571 B 0644
pvclock-abi.h File 1.49 KB 0644
pvclock.h File 2.64 KB 0644
qrwlock.h File 199 B 0644
qspinlock.h File 2.54 KB 0644
qspinlock_paravirt.h File 1.85 KB 0644
realmode.h File 1.76 KB 0644
reboot.h File 850 B 0644
reboot_fixups.h File 183 B 0644
refcount.h File 2.83 KB 0644
required-features.h File 2.81 KB 0644
rio.h File 2.57 KB 0644
rmwcc.h File 1.62 KB 0644
rwsem.h File 7.02 KB 0644
seccomp.h File 510 B 0644
sections.h File 465 B 0644
segment.h File 9.47 KB 0644
serial.h File 1.11 KB 0644
set_memory.h File 3.86 KB 0644
setup.h File 3.4 KB 0644
setup_arch.h File 77 B 0644
shmparam.h File 193 B 0644
sigcontext.h File 261 B 0644
sigframe.h File 2.25 KB 0644
sighandling.h File 649 B 0644
signal.h File 2.37 KB 0644
simd.h File 287 B 0644
smap.h File 1.71 KB 0644
smp.h File 4.73 KB 0644
sparsemem.h File 1.01 KB 0644
spec-ctrl.h File 2.81 KB 0644
special_insns.h File 5.04 KB 0644
spinlock.h File 1.19 KB 0644
spinlock_types.h File 719 B 0644
sta2x11.h File 352 B 0644
stackprotector.h File 4.13 KB 0644
stacktrace.h File 2.57 KB 0644
string.h File 129 B 0644
string_32.h File 7.74 KB 0644
string_64.h File 3.56 KB 0644
suspend.h File 131 B 0644
suspend_32.h File 822 B 0644
suspend_64.h File 1.79 KB 0644
svm.h File 7.08 KB 0644
swiotlb.h File 991 B 0644
switch_to.h File 2.98 KB 0644
sync_bitops.h File 3.42 KB 0644
sys_ia32.h File 1.8 KB 0644
syscall.h File 5.14 KB 0644
syscalls.h File 1.39 KB 0644
sysfb.h File 2.54 KB 0644
tce.h File 1.68 KB 0644
text-patching.h File 2.3 KB 0644
thread_info.h File 9.33 KB 0644
time.h File 331 B 0644
timer.h File 1 KB 0644
timex.h File 546 B 0644
tlb.h File 1.05 KB 0644
tlbbatch.h File 332 B 0644
tlbflush.h File 17.09 KB 0644
topology.h File 4.84 KB 0644
trace_clock.h File 406 B 0644
traps.h File 5.74 KB 0644
tsc.h File 1.93 KB 0644
uaccess.h File 21.69 KB 0644
uaccess_32.h File 1.54 KB 0644
uaccess_64.h File 5.32 KB 0644
umip.h File 329 B 0644
unaligned.h File 345 B 0644
unistd.h File 1.45 KB 0644
unwind.h File 3.13 KB 0644
unwind_hints.h File 3.01 KB 0644
uprobes.h File 1.57 KB 0644
user.h File 2.2 KB 0644
user32.h File 2.11 KB 0644
user_32.h File 4.92 KB 0644
user_64.h File 5.21 KB 0644
vdso.h File 1.09 KB 0644
vga.h File 740 B 0644
vgtod.h File 2.13 KB 0644
virtext.h File 2.62 KB 0644
vm86.h File 2.16 KB 0644
vmx.h File 23.5 KB 0644
vsyscall.h File 635 B 0644
vvar.h File 1.38 KB 0644
word-at-a-time.h File 2.54 KB 0644
x86_init.h File 9.25 KB 0644
xor.h File 10.26 KB 0644
xor_32.h File 14.4 KB 0644
xor_64.h File 716 B 0644
xor_avx.h File 4.5 KB 0644