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efi_loader: implement EFI_RT_PROPERTIES_TABLE

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UEFI spec 2.8 errata A replaces the RuntimeServicesSupported variable
defined in UEFI spec 2.8 by the configuration table
EFI_RT_PROPERTIES_TABLE. So let's follow suit.

Cc: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Tested-by: Ard Biesheuvel <ardb@kernel.org>
This commit is contained in:
Heinrich Schuchardt 2020-02-19 20:48:49 +01:00
parent 548ce227d3
commit 76be687288
4 changed files with 48 additions and 12 deletions
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4
cmd/efidebug.c
View file

@ -264,6 +264,10 @@ static const struct {
"SMBIOS table",
SMBIOS_TABLE_GUID,
},
{
"Runtime properties",
EFI_RT_PROPERTIES_TABLE_GUID,
},
};
/**

12
include/efi_api.h
View file

@ -228,6 +228,18 @@ struct efi_capsule_header {
#define EFI_RT_SUPPORTED_QUERY_CAPSULE_CAPABILITIES 0x1000
#define EFI_RT_SUPPORTED_QUERY_VARIABLE_INFO 0x2000
#define EFI_RT_PROPERTIES_TABLE_GUID \
EFI_GUID(0xeb66918a, 0x7eef, 0x402a, 0x84, 0x2e, \
0x93, 0x1d, 0x21, 0xc3, 0x8a, 0xe9)
#define EFI_RT_PROPERTIES_TABLE_VERSION 0x1
struct efi_rt_properties_table {
u16 version;
u16 length;
u32 runtime_services_supported;
};
struct efi_runtime_services {
struct efi_table_hdr hdr;
efi_status_t (EFIAPI *get_time)(struct efi_time *time,

36
lib/efi_loader/efi_runtime.c
View file

@ -18,6 +18,10 @@
/* For manual relocation support */
DECLARE_GLOBAL_DATA_PTR;
/* GUID of the runtime properties table */
static const efi_guid_t efi_rt_properties_table_guid =
EFI_RT_PROPERTIES_TABLE_GUID;
struct efi_runtime_mmio_list {
struct list_head link;
void **ptr;
@ -94,9 +98,28 @@ static __efi_runtime_data efi_uintn_t efi_descriptor_size;
* handle a good number of runtime callbacks
*/
/**
* efi_init_runtime_supported() - create runtime properties table
*
* Create a configuration table specifying which services are available at
* runtime.
*
* Return: status code
*/
efi_status_t efi_init_runtime_supported(void)
{
u16 efi_runtime_services_supported =
efi_status_t ret;
struct efi_rt_properties_table *rt_table;
ret = efi_allocate_pool(EFI_RUNTIME_SERVICES_DATA,
sizeof(struct efi_rt_properties_table),
(void **)&rt_table);
if (ret != EFI_SUCCESS)
return ret;
rt_table->version = EFI_RT_PROPERTIES_TABLE_VERSION;
rt_table->length = sizeof(struct efi_rt_properties_table);
rt_table->runtime_services_supported =
EFI_RT_SUPPORTED_SET_VIRTUAL_ADDRESS_MAP |
EFI_RT_SUPPORTED_CONVERT_POINTER;
@ -105,15 +128,12 @@ efi_status_t efi_init_runtime_supported(void)
* as well as efi_runtime_services.
*/
#ifdef CONFIG_EFI_HAVE_RUNTIME_RESET
efi_runtime_services_supported |= EFI_RT_SUPPORTED_RESET_SYSTEM;
rt_table->runtime_services_supported |= EFI_RT_SUPPORTED_RESET_SYSTEM;
#endif
return EFI_CALL(efi_set_variable(L"RuntimeServicesSupported",
&efi_global_variable_guid,
EFI_VARIABLE_BOOTSERVICE_ACCESS |
EFI_VARIABLE_RUNTIME_ACCESS,
sizeof(efi_runtime_services_supported),
&efi_runtime_services_supported));
ret = efi_install_configuration_table(&efi_rt_properties_table_guid,
rt_table);
return ret;
}
/**

8
lib/efi_loader/efi_setup.c
View file

@ -122,13 +122,13 @@ efi_status_t efi_init_obj_list(void)
if (ret != EFI_SUCCESS)
goto out;
/* Indicate supported runtime services */
ret = efi_init_runtime_supported();
/* Initialize system table */
ret = efi_initialize_system_table();
if (ret != EFI_SUCCESS)
goto out;
/* Initialize system table */
ret = efi_initialize_system_table();
/* Indicate supported runtime services */
ret = efi_init_runtime_supported();
if (ret != EFI_SUCCESS)
goto out;