diff options
| author | Achin Gupta <achin.gupta@arm.com> | 2020-10-06 16:39:21 +0530 |
|---|---|---|
| committer | Sughosh Ganu <sughosh.ganu@linaro.org> | 2021-01-07 17:32:18 +0530 |
| commit | c3853caf2f5f5598ef245a899f46ac83a96055c9 (patch) | |
| tree | 350e6dd0d7f6816bf33a4c44875353c15801974a | |
| parent | e48c685154e0a6203628afd15bdde1642c485980 (diff) | |
StandaloneMmMmuLib: Add option to use FF-A calls to get memory region's permissions
Allow getting memory region's permissions using either of the Firmware
Framework(FF-A) ABI transport or through the earlier used SVC calls.
Signed-off-by: Achin Gupta <achin.gupta@arm.com>
Co-developed-by: Sughosh Ganu <sughosh.ganu@linaro.org>
3 files changed, 100 insertions, 6 deletions
diff --git a/ArmPkg/Include/IndustryStandard/ArmFfaSvc.h b/ArmPkg/Include/IndustryStandard/ArmFfaSvc.h index bdf6ce4676..65b8343ade 100644 --- a/ArmPkg/Include/IndustryStandard/ArmFfaSvc.h +++ b/ArmPkg/Include/IndustryStandard/ArmFfaSvc.h @@ -23,4 +23,22 @@ #define SPM_MAJOR_VERSION_FFA 1
#define SPM_MINOR_VERSION_FFA 0
+#define ARM_FFA_SPM_RET_SUCCESS 0
+#define ARM_FFA_SPM_RET_NOT_SUPPORTED -1
+#define ARM_FFA_SPM_RET_INVALID_PARAMETERS -2
+#define ARM_FFA_SPM_RET_NO_MEMORY -3
+#define ARM_FFA_SPM_RET_BUSY -4
+#define ARM_FFA_SPM_RET_INTERRUPTED -5
+#define ARM_FFA_SPM_RET_DENIED -6
+#define ARM_FFA_SPM_RET_RETRY -7
+#define ARM_FFA_SPM_RET_ABORTED -8
+
+// For now, the destination id to be used in the FF-A calls
+// is being hard-coded. Subsequently, support will be added
+// to get the endpoint id's dynamically
+// This is the endpoint id used by the optee os's implementation
+// of the spmc.
+// https://github.com/OP-TEE/optee_os/blob/master/core/arch/arm/kernel/stmm_sp.c#L66
+#define ARM_FFA_DESTINATION_ENDPOINT_ID 3
+
#endif // ARM_FFA_SVC_H_
diff --git a/ArmPkg/Library/StandaloneMmMmuLib/AArch64/ArmMmuStandaloneMmLib.c b/ArmPkg/Library/StandaloneMmMmuLib/AArch64/ArmMmuStandaloneMmLib.c index e2770636fb..d98965ea73 100644 --- a/ArmPkg/Library/StandaloneMmMmuLib/AArch64/ArmMmuStandaloneMmLib.c +++ b/ArmPkg/Library/StandaloneMmMmuLib/AArch64/ArmMmuStandaloneMmLib.c @@ -17,6 +17,7 @@ #include <Library/BaseLib.h>
#include <Library/BaseMemoryLib.h>
#include <Library/DebugLib.h>
+#include <Library/PcdLib.h>
STATIC
EFI_STATUS
@@ -25,20 +26,92 @@ GetMemoryPermissions ( OUT UINT32 *MemoryAttributes
)
{
+ INT32 Ret;
ARM_SVC_ARGS GetMemoryPermissionsSvcArgs;
+ BOOLEAN FfaEnabled;
ZeroMem (&GetMemoryPermissionsSvcArgs, sizeof (ARM_SVC_ARGS));
- GetMemoryPermissionsSvcArgs.Arg0 = ARM_SVC_ID_SP_GET_MEM_ATTRIBUTES_AARCH64;
- GetMemoryPermissionsSvcArgs.Arg1 = BaseAddress;
+ FfaEnabled = FeaturePcdGet (PcdFfaEnable);
+ if (FfaEnabled) {
+ GetMemoryPermissionsSvcArgs.Arg0 = ARM_SVC_ID_FFA_MSG_SEND_DIRECT_REQ_AARCH64;
+ GetMemoryPermissionsSvcArgs.Arg1 = ARM_FFA_DESTINATION_ENDPOINT_ID;
+ GetMemoryPermissionsSvcArgs.Arg2 = 0;
+ GetMemoryPermissionsSvcArgs.Arg3 = ARM_SVC_ID_SP_GET_MEM_ATTRIBUTES_AARCH64;
+ GetMemoryPermissionsSvcArgs.Arg4 = BaseAddress;
+ } else {
+ GetMemoryPermissionsSvcArgs.Arg0 = ARM_SVC_ID_SP_GET_MEM_ATTRIBUTES_AARCH64;
+ GetMemoryPermissionsSvcArgs.Arg1 = BaseAddress;
+ GetMemoryPermissionsSvcArgs.Arg2 = 0;
+ GetMemoryPermissionsSvcArgs.Arg3 = 0;
+ }
ArmCallSvc (&GetMemoryPermissionsSvcArgs);
- if (GetMemoryPermissionsSvcArgs.Arg0 == ARM_SVC_SPM_RET_INVALID_PARAMS) {
- *MemoryAttributes = 0;
- return EFI_INVALID_PARAMETER;
+ if (FfaEnabled) {
+ if (GetMemoryPermissionsSvcArgs.Arg0 !=
+ ARM_SVC_ID_FFA_MSG_SEND_DIRECT_RESP_AARCH64) {
+ // If Arg0 is not a Direct Response, that means we
+ // have an FF-A error. We need to check Arg2 for the
+ // FF-A error code.
+ Ret = GetMemoryPermissionsSvcArgs.Arg2;
+ switch (Ret) {
+ case ARM_FFA_SPM_RET_INVALID_PARAMETERS:
+ *MemoryAttributes = 0;
+ return EFI_INVALID_PARAMETER;
+
+ case ARM_FFA_SPM_RET_DENIED:
+ *MemoryAttributes = 0;
+ return EFI_NOT_READY;
+
+ case ARM_FFA_SPM_RET_NOT_SUPPORTED:
+ *MemoryAttributes = 0;
+ return EFI_UNSUPPORTED;
+
+ case ARM_FFA_SPM_RET_BUSY:
+ *MemoryAttributes = 0;
+ return EFI_NOT_READY;
+
+ case ARM_FFA_SPM_RET_ABORTED:
+ *MemoryAttributes = 0;
+ return EFI_ABORTED;
+ }
+ } else if (GetMemoryPermissionsSvcArgs.Arg0 ==
+ ARM_SVC_ID_FFA_MSG_SEND_DIRECT_RESP_AARCH64) {
+ // A Direct Response means FF-A success
+ // Now check the payload for errors
+ // The callee sends back the return value
+ // in Arg3
+ Ret = GetMemoryPermissionsSvcArgs.Arg3;
+ if (Ret & BIT31) {
+ // Bit 31 set means there is an error retured
+ *MemoryAttributes = 0;
+ switch (Ret) {
+ case ARM_SVC_SPM_RET_INVALID_PARAMS:
+ return EFI_INVALID_PARAMETER;
+
+ case ARM_SVC_SPM_RET_NOT_SUPPORTED:
+ return EFI_UNSUPPORTED;
+ }
+ } else {
+ *MemoryAttributes = Ret;
+ }
+ }
+ } else {
+ Ret = GetMemoryPermissionsSvcArgs.Arg0;
+
+ switch (Ret) {
+ case ARM_SVC_SPM_RET_INVALID_PARAMS:
+ *MemoryAttributes = 0;
+ return EFI_INVALID_PARAMETER;
+
+ case ARM_SVC_SPM_RET_NOT_SUPPORTED:
+ *MemoryAttributes = 0;
+ return EFI_UNSUPPORTED;
+ }
+
+ *MemoryAttributes = Ret;
}
- *MemoryAttributes = GetMemoryPermissionsSvcArgs.Arg0;
return EFI_SUCCESS;
}
diff --git a/ArmPkg/Library/StandaloneMmMmuLib/ArmMmuStandaloneMmLib.inf b/ArmPkg/Library/StandaloneMmMmuLib/ArmMmuStandaloneMmLib.inf index 85973687f5..a29dd800b5 100644 --- a/ArmPkg/Library/StandaloneMmMmuLib/ArmMmuStandaloneMmLib.inf +++ b/ArmPkg/Library/StandaloneMmMmuLib/ArmMmuStandaloneMmLib.inf @@ -23,6 +23,9 @@ ArmPkg/ArmPkg.dec
MdePkg/MdePkg.dec
+[Pcd]
+ gArmTokenSpaceGuid.PcdFfaEnable
+
[LibraryClasses]
ArmLib
CacheMaintenanceLib
|