[PATCH v4 16/17] efi_loader: enable UEFI variables at runtime

[Heinrich Schuchardt]

Enable UEFI variables at runtime.

Signed-off-by: Heinrich Schuchardt <xypron.g...@gmx.de>
---
 lib/efi_loader/efi_runtime.c  |  2 ++
 lib/efi_loader/efi_var_file.c |  6 +++---
 lib/efi_loader/efi_variable.c | 14 ++++++++++++--
 3 files changed, 17 insertions(+), 5 deletions(-)

diff --git a/lib/efi_loader/efi_runtime.c b/lib/efi_loader/efi_runtime.c
index 5b6506fbdc..91a4551448 100644
--- a/lib/efi_loader/efi_runtime.c
+++ b/lib/efi_loader/efi_runtime.c
@@ -121,6 +121,8 @@ efi_status_t efi_init_runtime_supported(void)
        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_GET_VARIABLE |
+                               EFI_RT_SUPPORTED_GET_NEXT_VARIABLE_NAME |
                                EFI_RT_SUPPORTED_SET_VIRTUAL_ADDRESS_MAP |
                                EFI_RT_SUPPORTED_CONVERT_POINTER;

diff --git a/lib/efi_loader/efi_var_file.c b/lib/efi_loader/efi_var_file.c
index b1b7532495..880c279aef 100644
--- a/lib/efi_loader/efi_var_file.c
+++ b/lib/efi_loader/efi_var_file.c
@@ -183,9 +183,9 @@ static efi_status_t __maybe_unused efi_var_restore(struct 
efi_var_file *buf)
                u16 *data = var->name + u16_strlen(var->name) + 1;

                if (var->attr & EFI_VARIABLE_NON_VOLATILE && var->length) {
-                       ret = efi_set_variable_int(var->name, &var->guid,
-                                                  var->attr, var->length,
-                                                  data, true);
+                       ret = efi_var_mem_ins(var->name, &var->guid, var->attr,
+                                             var->length, data, 0, NULL,
+                                             var->time);
                        if (ret != EFI_SUCCESS)
                                log_err("Failed to set EFI variable %ls\n",
                                        var->name);
diff --git a/lib/efi_loader/efi_variable.c b/lib/efi_loader/efi_variable.c
index bbdc071126..eab5f005da 100644
--- a/lib/efi_loader/efi_variable.c
+++ b/lib/efi_loader/efi_variable.c
@@ -668,7 +668,16 @@ static efi_status_t __efi_runtime EFIAPI
 efi_get_variable_runtime(u16 *variable_name, const efi_guid_t *vendor,
                         u32 *attributes, efi_uintn_t *data_size, void *data)
 {
-       return EFI_UNSUPPORTED;
+       efi_status_t ret;
+
+       ret = efi_get_variable_int(variable_name, vendor, attributes,
+                                  data_size, data, NULL);
+
+       /* Remove EFI_VARIABLE_READ_ONLY flag */
+       if (attributes)
+               *attributes &= EFI_VARIABLE_MASK;
+
+       return ret;
 }

 /**
@@ -684,7 +693,8 @@ static efi_status_t __efi_runtime EFIAPI
 efi_get_next_variable_name_runtime(efi_uintn_t *variable_name_size,
                                   u16 *variable_name, efi_guid_t *vendor)
 {
-       return EFI_UNSUPPORTED;
+       return efi_get_next_variable_name_int(variable_name_size, variable_name,
+                                             vendor);
 }

 /**
--
2.27.0