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efi: stub: implement efi_get_random_bytes() based on EFI_RNG_PROTOCOL

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This exposes the firmware's implementation of EFI_RNG_PROTOCOL via a new
function efi_get_random_bytes().

Reviewed-by: Matt Fleming <matt@codeblueprint.co.uk>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
This commit is contained in:
Ard Biesheuvel
2016-01-10 11:29:07 +01:00
committed by Catalin Marinas
parent c031a4213c
commit e4fbf47674
4 changed files with 44 additions and 2 deletions
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6
include/linux/efi.h
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@@ -299,7 +299,7 @@ typedef struct {
void *open_protocol_information;
void *protocols_per_handle;
void *locate_handle_buffer;
void *locate_protocol;
efi_status_t (*locate_protocol)(efi_guid_t *, void *, void **);
void *install_multiple_protocol_interfaces;
void *uninstall_multiple_protocol_interfaces;
void *calculate_crc32;
@@ -599,6 +599,10 @@ void efi_native_runtime_setup(void);
#define EFI_PROPERTIES_TABLE_GUID \
EFI_GUID( 0x880aaca3, 0x4adc, 0x4a04, 0x90, 0x79, 0xb7, 0x47, 0x34, 0x08, 0x25, 0xe5 )
#define EFI_RNG_PROTOCOL_GUID \
EFI_GUID(0x3152bca5, 0xeade, 0x433d, \
0x86, 0x2e, 0xc0, 0x1c, 0xdc, 0x29, 0x1f, 0x44)
typedef struct {
efi_guid_t guid;
u64 table;