efi_loader: variable: support non-volatile attribute

The attribute, EFI_VARIABLE_NON_VOLATILE, should be encoded as "nv" flag
in U-Boot variable if specified.

Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
Reviewed-by: Heinrich Schuchardt <xypron.glpk@gmx.de>

diff --git a/lib/efi_loader/efi_variable.c b/lib/efi_loader/efi_variable.c
index 50bc105..e560531 100644 (file)
--- a/lib/efi_loader/efi_variable.c
+++ b/lib/efi_loader/efi_variable.c
@@ -125,6 +125,8 @@ static const char *parse_attr(const char *str, u32 *attrp)
 
                if ((s = prefix(str, "ro"))) {
                        attr |= READ_ONLY;
+               } else if ((s = prefix(str, "nv"))) {
+                       attr |= EFI_VARIABLE_NON_VOLATILE;
                } else if ((s = prefix(str, "boot"))) {
                        attr |= EFI_VARIABLE_BOOTSERVICE_ACCESS;
                } else if ((s = prefix(str, "run"))) {
@@ -468,7 +470,7 @@ efi_status_t EFIAPI efi_set_variable(u16 *variable_name,
                }
        }
 
-       val = malloc(2 * data_size + strlen("{ro,run,boot}(blob)") + 1);
+       val = malloc(2 * data_size + strlen("{ro,run,boot,nv}(blob)") + 1);
        if (!val) {
                ret = EFI_OUT_OF_RESOURCES;
                goto out;
@@ -480,12 +482,16 @@ efi_status_t EFIAPI efi_set_variable(u16 *variable_name,
         * store attributes
         * TODO: several attributes are not supported
         */
-       attributes &= (EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS);
+       attributes &= (EFI_VARIABLE_NON_VOLATILE |
+                      EFI_VARIABLE_BOOTSERVICE_ACCESS |
+                      EFI_VARIABLE_RUNTIME_ACCESS);
        s += sprintf(s, "{");
        while (attributes) {
                u32 attr = 1 << (ffs(attributes) - 1);
 
-               if (attr == EFI_VARIABLE_BOOTSERVICE_ACCESS)
+               if (attr == EFI_VARIABLE_NON_VOLATILE)
+                       s += sprintf(s, "nv");
+               else if (attr == EFI_VARIABLE_BOOTSERVICE_ACCESS)
                        s += sprintf(s, "boot");
                else if (attr == EFI_VARIABLE_RUNTIME_ACCESS)
                        s += sprintf(s, "run");