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efi/libstub: Make the LoadFile EFI protocol accessible 

Add the protocol definitions, GUIDs and mixed mode glue so that
the EFI loadfile protocol can be used from the stub. This will
be used in a future patch to load the initrd.

Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
This commit is contained in:
Ard Biesheuvel 2020-02-10 17:02:48 +01:00
parent abd268685a
commit 2931d526d5
3 changed files with 20 additions and 0 deletions
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4
arch/x86/include/asm/efi.h
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@ -291,6 +291,10 @@ static inline void *efi64_zero_upper(void *p)
((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))
/*
* The macros below handle the plumbing for the argument mapping. To add a
* mapping for a specific EFI method, simply define a macro

14
drivers/firmware/efi/libstub/efistub.h
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@ -541,6 +541,20 @@ union efi_tcg2_protocol {
} mixed_mode;
};
typedef union efi_load_file_protocol efi_load_file_protocol_t;
typedef union efi_load_file_protocol efi_load_file2_protocol_t;
union efi_load_file_protocol {
struct {
efi_status_t (__efiapi *load_file)(efi_load_file_protocol_t *,
efi_device_path_protocol_t *,
bool, unsigned long *, void *);
};
struct {
u32 load_file;
} mixed_mode;
};
void efi_pci_disable_bridge_busmaster(void);
typedef efi_status_t (*efi_exit_boot_map_processing)(

2
include/linux/efi.h
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@ -332,6 +332,8 @@ void efi_native_runtime_setup(void);
#define EFI_CONSOLE_OUT_DEVICE_GUID EFI_GUID(0xd3b36f2c, 0xd551, 0x11d4, 0x9a, 0x46, 0x00, 0x90, 0x27, 0x3f, 0xc1, 0x4d)
#define APPLE_PROPERTIES_PROTOCOL_GUID EFI_GUID(0x91bd12fe, 0xf6c3, 0x44fb, 0xa5, 0xb7, 0x51, 0x22, 0xab, 0x30, 0x3a, 0xe0)
#define EFI_TCG2_PROTOCOL_GUID EFI_GUID(0x607f766c, 0x7455, 0x42be, 0x93, 0x0b, 0xe4, 0xd7, 0x6d, 0xb2, 0x72, 0x0f)
#define EFI_LOAD_FILE_PROTOCOL_GUID EFI_GUID(0x56ec3091, 0x954c, 0x11d2, 0x8e, 0x3f, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b)
#define EFI_LOAD_FILE2_PROTOCOL_GUID EFI_GUID(0x4006c0c1, 0xfcb3, 0x403e, 0x99, 0x6d, 0x4a, 0x6c, 0x87, 0x24, 0xe0, 0x6d)
#define EFI_IMAGE_SECURITY_DATABASE_GUID EFI_GUID(0xd719b2cb, 0x3d3a, 0x4596, 0xa3, 0xbc, 0xda, 0xd0, 0x0e, 0x67, 0x65, 0x6f)
#define EFI_SHIM_LOCK_GUID EFI_GUID(0x605dab50, 0xe046, 0x4300, 0xab, 0xb6, 0x3d, 0xd8, 0x10, 0xdd, 0x8b, 0x23)