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autoboot: Improve docs for CONFIG_AUTOBOOT_ENCRYPTION

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This option is not documented properly at present. Fix it.

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass
2019-07-20 20:51:17 -06:00
committed by Tom Rini
parent e8c780560a
commit 88fa4beb63
4 changed files with 41 additions and 1 deletions
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16
common/autoboot.c
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@@ -54,6 +54,14 @@ static int slow_equals(u8 *a, u8 *b, int len)
return diff == 0;
}
/**
* passwd_abort_sha256() - check for a hashed key sequence to abort booting
*
* This checks for the user entering a SHA256 hash within a given time.
*
* @etime: Timeout value ticks (stop when get_ticks() reachs this)
* @return 0 if autoboot should continue, 1 if it should stop
*/
static int passwd_abort_sha256(uint64_t etime)
{
const char *sha_env_str = env_get("bootstopkeysha256");
@@ -106,6 +114,14 @@ static int passwd_abort_sha256(uint64_t etime)
return abort;
}
/**
* passwd_abort_key() - check for a key sequence to aborted booting
*
* This checks for the user entering a string within a given time.
*
* @etime: Timeout value ticks (stop when get_ticks() reachs this)
* @return 0 if autoboot should continue, 1 if it should stop
*/
static int passwd_abort_key(uint64_t etime)
{
int abort = 0;