feat(rmmd): add support for RMM Boot interface
This patch adds the infrastructure needed to pass boot arguments from
EL3 to RMM and allocates a shared buffer between both worlds that can
be used, among others, to pass a boot manifest to RMM. The buffer is
composed a single memory page be used by a later EL3 <-> RMM interface
by all CPUs.
The RMM boot manifest is not implemented by this patch.
In addition to that, this patch also enables support for RMM when
RESET_TO_BL31 is enabled.
Signed-off-by: Javier Almansa Sobrino <javier.almansasobrino@arm.com>
Change-Id: I855cd4758ee3843eadd9fb482d70a6d18954d82a
diff --git a/docs/getting_started/porting-guide.rst b/docs/getting_started/porting-guide.rst
index 2c6a005..87c4ccb 100644
--- a/docs/getting_started/porting-guide.rst
+++ b/docs/getting_started/porting-guide.rst
@@ -2017,7 +2017,7 @@
(that was copied during ``bl31_early_platform_setup()``) if the image exists. It
should return NULL otherwise.
-Function : plat_get_cca_attest_token() [mandatory when ENABLE_RME == 1]
+Function : plat_rmmd_get_cca_attest_token() [mandatory when ENABLE_RME == 1]
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
::
@@ -2043,8 +2043,8 @@
The function returns 0 on success, -EINVAL on failure.
-Function : plat_get_cca_realm_attest_key() [mandatory when ENABLE_RME == 1]
-~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+Function : plat_rmmd_get_cca_realm_attest_key() [mandatory when ENABLE_RME == 1]
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
::
@@ -2069,6 +2069,18 @@
The function returns 0 on success, -EINVAL on failure.
+Function : plat_rmmd_get_el3_rmm_shared_mem() [when ENABLE_RME == 1]
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+::
+
+ Argument : uintptr_t *
+ Return : size_t
+
+This function returns the size of the shared area between EL3 and RMM (or 0 on
+failure). A pointer to the shared area (or a NULL pointer on failure) is stored
+in the pointer passed as argument.
+
Function : bl31_plat_enable_mmu [optional]
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~