Commit d7dd9b44 authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge tag 'efi-next-for-v6.6' of git://git.kernel.org/pub/scm/linux/kernel/git/efi/efi 

Pull EFI updates from Ard Biesheuvel:
 "This primarily covers some cleanup work on the EFI runtime wrappers,
  which are shared between all EFI architectures except Itanium, and
  which provide some level of isolation to prevent faults occurring in
  the firmware code (which runs at the same privilege level as the
  kernel) from bringing down the system.

  Beyond that, there is a fix that did not make it into v6.5, and some
  doc fixes and dead code cleanup.

   - one bugfix for x86 mixed mode that did not make it into v6.5

   - first pass of cleanup for the EFI runtime wrappers

   - some cosmetic touchups"

* tag 'efi-next-for-v6.6' of git://git.kernel.org/pub/scm/linux/kernel/git/efi/efi:
  x86/efistub: Fix PCI ROM preservation in mixed mode
  efi/runtime-wrappers: Clean up white space and add __init annotation
  acpi/prmt: Use EFI runtime sandbox to invoke PRM handlers
  efi/runtime-wrappers: Don't duplicate setup/teardown code
  efi/runtime-wrappers: Remove duplicated macro for service returning void
  efi/runtime-wrapper: Move workqueue manipulation out of line
  efi/runtime-wrappers: Use type safe encapsulation of call arguments
  efi/riscv: Move EFI runtime call setup/teardown helpers out of line
  efi/arm64: Move EFI runtime call setup/teardown helpers out of line
  efi/riscv: libstub: Fix comment about absolute relocation
  efi: memmap: Remove kernel-doc warnings
  efi: Remove unused extern declaration efi_lookup_mapped_addr()
parents 42a7f6e3 b691118f

arch/arm64/include/asm/efi.h

+3 −15
Original line number Diff line number Diff line
@@ -30,28 +30,16 @@ 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,

				bool has_bti);



#define arch_efi_call_virt_setup()					\

({									\

	efi_virtmap_load();						\

	__efi_fpsimd_begin();						\

	raw_spin_lock(&efi_rt_lock);					\

})



#undef arch_efi_call_virt

#define arch_efi_call_virt(p, f, args...)				\

	__efi_rt_asm_wrapper((p)->f, #f, args)



#define arch_efi_call_virt_teardown()					\

({									\

	raw_spin_unlock(&efi_rt_lock);					\

	__efi_fpsimd_end();						\

	efi_virtmap_unload();						\

})



extern raw_spinlock_t efi_rt_lock;

extern u64 *efi_rt_stack_top;

efi_status_t __efi_rt_asm_wrapper(void *, const char *, ...);



void arch_efi_call_virt_setup(void);

void arch_efi_call_virt_teardown(void);



/*

 * efi_rt_stack_top[-1] contains the value the stack pointer had before

 * switching to the EFI runtime stack.

arch/arm64/kernel/efi.c

+15 −1
Original line number Diff line number Diff line
@@ -158,7 +158,21 @@ asmlinkage efi_status_t efi_handle_corrupted_x18(efi_status_t s, const char *f) 
	return s;

}



DEFINE_RAW_SPINLOCK(efi_rt_lock);

static DEFINE_RAW_SPINLOCK(efi_rt_lock);



void arch_efi_call_virt_setup(void)

{

	efi_virtmap_load();

	__efi_fpsimd_begin();

	raw_spin_lock(&efi_rt_lock);

}



void arch_efi_call_virt_teardown(void)

{

	raw_spin_unlock(&efi_rt_lock);

	__efi_fpsimd_end();

	efi_virtmap_unload();

}



asmlinkage u64 *efi_rt_stack_top __ro_after_init;

arch/riscv/include/asm/efi.h

+2 −8
Original line number Diff line number Diff line
@@ -21,12 +21,6 @@ extern 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, bool);



#define arch_efi_call_virt_setup()      ({		\

		sync_kernel_mappings(efi_mm.pgd);	\

		efi_virtmap_load();			\

	})

#define arch_efi_call_virt_teardown()   efi_virtmap_unload()



#define ARCH_EFI_IRQ_FLAGS_MASK (SR_IE | SR_SPIE)



/* Load initrd anywhere in system RAM */
@@ -46,8 +40,8 @@ static inline unsigned long efi_get_kimg_min_align(void) 


#define EFI_KIMG_PREFERRED_ADDRESS	efi_get_kimg_min_align()



void efi_virtmap_load(void);

void efi_virtmap_unload(void);

void arch_efi_call_virt_setup(void);

void arch_efi_call_virt_teardown(void);



unsigned long stext_offset(void);

arch/x86/include/asm/uv/bios.h

+3 −1
Original line number Diff line number Diff line
@@ -10,6 +10,7 @@ 
 * Copyright (c) Russ Anderson <rja@sgi.com>

 */



#include <linux/efi.h>

#include <linux/rtc.h>



/*
@@ -115,7 +116,8 @@ struct uv_arch_type_entry { 
struct uv_systab {

	char signature[4];	/* must be UV_SYSTAB_SIG */

	u32 revision;		/* distinguish different firmware revs */

	u64 function;		/* BIOS runtime callback function ptr */

	u64 (__efiapi *function)(enum uv_bios_cmd, ...);

				/* BIOS runtime callback function ptr */

	u32 size;		/* systab size (starting with _VERSION_UV4) */

	struct {

		u32 type:8;	/* type of entry */

arch/x86/platform/efi/memmap.c

+1 −1
Original line number Diff line number Diff line
@@ -82,7 +82,7 @@ int __init efi_memmap_alloc(unsigned int num_entries, 


/**

 * efi_memmap_install - Install a new EFI memory map in efi.memmap

 * @ctx: map allocation parameters (address, size, flags)

 * @data: efi memmap installation parameters

 *

 * Unlike efi_memmap_init_*(), this function does not allow the caller

 * to switch from early to late mappings. It simply uses the existing