[PATCH 11/12] doc: bootefi: note two-phase runtime variables selftest

[Harsimran Singh Tungal]

Explain how the runtime variable selftest runs in two phases

Document that the "variables at runtime" selftest runs in two
phases when CONFIG_EFI_RT_VOLATILE_STORE is not enabled, and
show how to select it with efi_selftest.

Signed-off-by: Harsimran Singh Tungal <harsimransingh.tungal at arm.com>
---
 doc/usage/cmd/bootefi.rst | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/doc/usage/cmd/bootefi.rst b/doc/usage/cmd/bootefi.rst
index 7c5448586b7..91aebf1a4b5 100644
--- a/doc/usage/cmd/bootefi.rst
+++ b/doc/usage/cmd/bootefi.rst
@@ -160,6 +160,16 @@ environment variable to match one of the listed identifiers
 Some of the tests execute the ExitBootServices() UEFI boot service and will not
 return to the command line but require a board reset.
 
+The test *variables at runtime* runs in two phases when
+CONFIG_EFI_RT_VOLATILE_STORE is not enabled. Run it once to create a
+runtime-accessible variable in non-volatile storage, reboot, then run it
+again to validate, append, and delete that variable.
+
+::
+
+    => setenv efi_selftest 'variables at runtime'
+    => bootefi selftest
+
 Configuration
 -------------
 
@@ -167,6 +177,8 @@ To use the *bootefi* command you must specify CONFIG_CMD_BOOTEFI=y.
 The *bootefi bootmgr* sub-command requries CMD_BOOTEFI_BOOTMGR=y.
 The *bootefi hello* sub-command requries CMD_BOOTEFI_HELLO=y.
 The *bootefi selftest* sub-command depends on CMD_BOOTEFI_SELFTEST=y.
+The *variables at runtime* selftest runs in two phases when
+CONFIG\_EFI\_RT\_VOLATILE\_STORE is not enabled.
 
 See also
 --------
-- 
2.34.1