The firmware field of GpaMap was initialized once but never read. This
raises a warning in the last clippy release.

Signed-off-by: Thomas Leroy <[email protected]>

The log buffer is implemented using a ring buffer that contains the
characters within log entries. This patch introduces a generic
StringRingBuffer that can be used for safely managing the contents of
strings within a ring buffer that is suitable for use with the log
buffer. This separates the ring buffer implementation from the log and
allows implementation of ring buffer specific unit testing, which is
included within this patch.

Signed-off-by: Vasant Karasulli <[email protected]>
Signed-off-by: Roy Hopkins <[email protected]>

memory.

This log buffer is based on the string ring buffer in
utils/StringRingBuffer.

Signed-off-by: Vasant Karasulli <[email protected]>

log messages.

Each individual log message gets written into the global log buffer
from the percpu line buffer.

Signed-off-by: Vasant Karasulli <[email protected]>

kernel.

Introduce a new struct MigrateInfo which contains the data to
be migrated from stage2 to svsm kernel.

Signed-off-by: Vasant Karasulli <[email protected]>

This feature can be enable to print log messages to console in
addition to storing them in the log buffer.
Enable this feature by default for debug builds.

Signed-off-by: Vasant Karasulli <[email protected]>

Test the log_buffer by calling methods like write_log()
and read_log().

Signed-off-by: Vasant Karasulli <[email protected]>