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Commit 3b370237 authored by Matthew Garrett's avatar Matthew Garrett Committed by H. Peter Anvin
Browse files

x86, efi: Add infrastructure for UEFI 2.0 runtime services 



We're currently missing support for any of the runtime service calls
introduced with the UEFI 2.0 spec in 2006. Add the infrastructure for
supporting them.

Signed-off-by: default avatarMatthew Garrett <mjg@redhat.com>
Link: http://lkml.kernel.org/r/1307388985-7852-2-git-send-email-mjg@redhat.com


Signed-off-by: default avatarH. Peter Anvin <hpa@linux.intel.com>
parent f7a2d73f

arch/x86/platform/efi/efi.c

+37 −0
Original line number Original line Diff line number Diff line
@@ -131,6 +131,18 @@ static efi_status_t virt_efi_set_variable(efi_char16_t *name, 
			      data_size, data);

			      data_size, data);

}

}





static efi_status_t virt_efi_query_variable_info(u32 attr,

						 u64 *storage_space,

						 u64 *remaining_space,

						 u64 *max_variable_size)

{

	if (efi.runtime_version < EFI_2_00_SYSTEM_TABLE_REVISION)

		return EFI_UNSUPPORTED;



	return efi_call_virt4(query_variable_info, attr, storage_space,

			      remaining_space, max_variable_size);

}



static efi_status_t virt_efi_get_next_high_mono_count(u32 *count)

static efi_status_t virt_efi_get_next_high_mono_count(u32 *count)

{

{

	return efi_call_virt1(get_next_high_mono_count, count);

	return efi_call_virt1(get_next_high_mono_count, count);
@@ -145,6 +157,28 @@ static void virt_efi_reset_system(int reset_type, 
		       data_size, data);

		       data_size, data);

}

}





static efi_status_t virt_efi_update_capsule(efi_capsule_header_t **capsules,

					    unsigned long count,

					    unsigned long sg_list)

{

	if (efi.runtime_version < EFI_2_00_SYSTEM_TABLE_REVISION)

		return EFI_UNSUPPORTED;



	return efi_call_virt3(update_capsule, capsules, count, sg_list);

}



static efi_status_t virt_efi_query_capsule_caps(efi_capsule_header_t **capsules,

						unsigned long count,

						u64 *max_size,

						int *reset_type)

{

	if (efi.runtime_version < EFI_2_00_SYSTEM_TABLE_REVISION)

		return EFI_UNSUPPORTED;



	return efi_call_virt4(query_capsule_caps, capsules, count, max_size,

			      reset_type);

}



static efi_status_t __init phys_efi_set_virtual_address_map(

static efi_status_t __init phys_efi_set_virtual_address_map(

	unsigned long memory_map_size,

	unsigned long memory_map_size,

	unsigned long descriptor_size,

	unsigned long descriptor_size,
@@ -651,6 +685,9 @@ void __init efi_enter_virtual_mode(void) 
	efi.get_next_high_mono_count = virt_efi_get_next_high_mono_count;

	efi.get_next_high_mono_count = virt_efi_get_next_high_mono_count;

	efi.reset_system = virt_efi_reset_system;

	efi.reset_system = virt_efi_reset_system;

	efi.set_virtual_address_map = NULL;

	efi.set_virtual_address_map = NULL;

	efi.query_variable_info = virt_efi_query_variable_info;

	efi.update_capsule = virt_efi_update_capsule;

	efi.query_capsule_caps = virt_efi_query_capsule_caps;

	if (__supported_pte_mask & _PAGE_NX)

	if (__supported_pte_mask & _PAGE_NX)

		runtime_code_page_mkexec();

		runtime_code_page_mkexec();

	early_iounmap(memmap.map, memmap.nr_map * memmap.desc_size);

	early_iounmap(memmap.map, memmap.nr_map * memmap.desc_size);

include/linux/efi.h

+32 −0
Original line number Original line Diff line number Diff line
@@ -101,6 +101,13 @@ typedef struct { 
	u64 attribute;

	u64 attribute;

} efi_memory_desc_t;

} efi_memory_desc_t;





typedef struct {

	efi_guid_t guid;

	u32 headersize;

	u32 flags;

	u32 imagesize;

} efi_capsule_header_t;



typedef int (*efi_freemem_callback_t) (u64 start, u64 end, void *arg);

typedef int (*efi_freemem_callback_t) (u64 start, u64 end, void *arg);





/*

/*
@@ -156,6 +163,9 @@ typedef struct { 
	unsigned long set_variable;

	unsigned long set_variable;

	unsigned long get_next_high_mono_count;

	unsigned long get_next_high_mono_count;

	unsigned long reset_system;

	unsigned long reset_system;

	unsigned long update_capsule;

	unsigned long query_capsule_caps;

	unsigned long query_variable_info;

} efi_runtime_services_t;

} efi_runtime_services_t;





typedef efi_status_t efi_get_time_t (efi_time_t *tm, efi_time_cap_t *tc);

typedef efi_status_t efi_get_time_t (efi_time_t *tm, efi_time_cap_t *tc);
@@ -177,6 +187,17 @@ typedef efi_status_t efi_set_virtual_address_map_t (unsigned long memory_map_siz 
						unsigned long descriptor_size,

						unsigned long descriptor_size,

						u32 descriptor_version,

						u32 descriptor_version,

						efi_memory_desc_t *virtual_map);

						efi_memory_desc_t *virtual_map);

typedef efi_status_t efi_query_variable_info_t(u32 attr,

					       u64 *storage_space,

					       u64 *remaining_space,

					       u64 *max_variable_size);

typedef efi_status_t efi_update_capsule_t(efi_capsule_header_t **capsules,

					  unsigned long count,

					  unsigned long sg_list);

typedef efi_status_t efi_query_capsule_caps_t(efi_capsule_header_t **capsules,

					      unsigned long count,

					      u64 *max_size,

					      int *reset_type);





/*

/*

 *  EFI Configuration Table and GUID definitions

 *  EFI Configuration Table and GUID definitions
@@ -218,6 +239,13 @@ typedef struct { 




#define EFI_SYSTEM_TABLE_SIGNATURE ((u64)0x5453595320494249ULL)

#define EFI_SYSTEM_TABLE_SIGNATURE ((u64)0x5453595320494249ULL)





#define EFI_2_30_SYSTEM_TABLE_REVISION  ((2 << 16) | (30))

#define EFI_2_20_SYSTEM_TABLE_REVISION  ((2 << 16) | (20))

#define EFI_2_10_SYSTEM_TABLE_REVISION  ((2 << 16) | (10))

#define EFI_2_00_SYSTEM_TABLE_REVISION  ((2 << 16) | (00))

#define EFI_1_10_SYSTEM_TABLE_REVISION  ((1 << 16) | (10))

#define EFI_1_02_SYSTEM_TABLE_REVISION  ((1 << 16) | (02))



typedef struct {

typedef struct {

	efi_table_hdr_t hdr;

	efi_table_hdr_t hdr;

	unsigned long fw_vendor;	/* physical addr of CHAR16 vendor string */

	unsigned long fw_vendor;	/* physical addr of CHAR16 vendor string */
@@ -250,6 +278,7 @@ struct efi_memory_map { 
 */

 */

extern struct efi {

extern struct efi {

	efi_system_table_t *systab;	/* EFI system table */

	efi_system_table_t *systab;	/* EFI system table */

	unsigned int runtime_version;	/* Runtime services version */

	unsigned long mps;		/* MPS table */

	unsigned long mps;		/* MPS table */

	unsigned long acpi;		/* ACPI table  (IA64 ext 0.71) */

	unsigned long acpi;		/* ACPI table  (IA64 ext 0.71) */

	unsigned long acpi20;		/* ACPI table  (ACPI 2.0) */

	unsigned long acpi20;		/* ACPI table  (ACPI 2.0) */
@@ -266,6 +295,9 @@ extern struct efi { 
	efi_get_variable_t *get_variable;

	efi_get_variable_t *get_variable;

	efi_get_next_variable_t *get_next_variable;

	efi_get_next_variable_t *get_next_variable;

	efi_set_variable_t *set_variable;

	efi_set_variable_t *set_variable;

	efi_query_variable_info_t *query_variable_info;

	efi_update_capsule_t *update_capsule;

	efi_query_capsule_caps_t *query_capsule_caps;

	efi_get_next_high_mono_count_t *get_next_high_mono_count;

	efi_get_next_high_mono_count_t *get_next_high_mono_count;

	efi_reset_system_t *reset_system;

	efi_reset_system_t *reset_system;

	efi_set_virtual_address_map_t *set_virtual_address_map;

	efi_set_virtual_address_map_t *set_virtual_address_map;