[RFC v2 7/8] tools/arm: add "arm_sci" option to xl.cfg

[Oleksii Moisieiev <Oleksii_Moisieiev@xxxxxxxx>]

This enumeration sets SCI type for the domain. Currently there is
two possible options: either 'none' or 'scmi_smc'.

'none' is the default value and it disables SCI support at all.

'scmi_smc' enables access to the Firmware from the domains using SCMI
protocol and SMC as transport.

Signed-off-by: Oleksii Moisieiev <oleksii_moisieiev@xxxxxxxx>
---
 docs/man/xl.cfg.5.pod.in             | 20 ++++++++++++++++++++
 tools/golang/xenlight/helpers.gen.go |  2 ++
 tools/golang/xenlight/types.gen.go   |  7 +++++++
 tools/include/libxl.h                |  5 +++++
 tools/libs/light/libxl_types.idl     |  6 ++++++
 tools/xl/xl_parse.c                  |  9 +++++++++
 6 files changed, 49 insertions(+)

diff --git a/docs/man/xl.cfg.5.pod.in b/docs/man/xl.cfg.5.pod.in
index ddf82cb3bc..f960e367c4 100644
--- a/docs/man/xl.cfg.5.pod.in
+++ b/docs/man/xl.cfg.5.pod.in
@@ -1614,8 +1614,28 @@ This feature is a B<technology preview>.
 
 =back
 
+=item B<arm_sci="STRING">
+
+B<Arm only> Set ARM_SCI type for the guest. ARM_SCI is System Control Protocol
+allows domain to manage various functions that are provided by HW platform.
+
 =over 4
 
+=item B<none>
+
+Don't allow guest to use ARM_SCI if present on the platform. This is the
+default value.
+
+=item B<scmi_smc>
+
+Enables SCMI_SMC support for the guest. SCMI is System Control Management
+Inferface - allows domain to manage various functions that are provided by HW
+platform, such as clocks, resets and power-domains. Xen will mediate access to
+clocks, power-domains and resets between Domains and ATF. Disabled by default.
+SCP is used as transport.
+
+=back
+
 =item B<force_assign_without_iommu=BOOLEAN>
 
 If set, Xen allows to assign a devices even if it is not behind an IOMMU.
diff --git a/tools/golang/xenlight/helpers.gen.go 
b/tools/golang/xenlight/helpers.gen.go
index 664933bbb8..6cf7725735 100644
--- a/tools/golang/xenlight/helpers.gen.go
+++ b/tools/golang/xenlight/helpers.gen.go
@@ -1091,6 +1091,7 @@ if err := x.DmRestrict.fromC(&xc.dm_restrict);err != nil {
 return fmt.Errorf("converting field DmRestrict: %v", err)
 }
 x.Tee = TeeType(xc.tee)
+x.ArmSci = ArmSciType(xc.arm_sci)
 
 if err := x.ForceAssignWithoutIommu.fromC(&xc.force_assign_without_iommu);err 
!= nil {
 return fmt.Errorf("converting field ForceAssignWithoutIommu: %v", err)
@@ -1439,6 +1440,7 @@ if err := x.DmRestrict.toC(&xc.dm_restrict); err != nil {
 return fmt.Errorf("converting field DmRestrict: %v", err)
 }
 xc.tee = C.libxl_tee_type(x.Tee)
+xc.arm_sci = C.libxl_arm_sci_type(x.ArmSci)
 xc._type = C.libxl_domain_type(x.Type)
 switch x.Type{
 case DomainTypeHvm:
diff --git a/tools/golang/xenlight/types.gen.go 
b/tools/golang/xenlight/types.gen.go
index 2f7a088c3b..3b5c959215 100644
--- a/tools/golang/xenlight/types.gen.go
+++ b/tools/golang/xenlight/types.gen.go
@@ -443,6 +443,12 @@ TeeTypeNone TeeType = 0
 TeeTypeOptee TeeType = 1
 )
 
+type ArmSciType int
+const(
+ArmSciTypeNone ArmSciType = 0
+ArmSciTypeScmi ArmSciType = 1
+)
+
 type RdmReserve struct {
 Strategy RdmReserveStrategy
 Policy RdmReservePolicy
@@ -512,6 +518,7 @@ NestedHvm Defbool
 Apic Defbool
 DmRestrict Defbool
 Tee TeeType
+ArmSci ArmSciType
 ForceAssignWithoutIommu Defbool
 Type DomainType
 TypeUnion DomainBuildInfoTypeUnion
diff --git a/tools/include/libxl.h b/tools/include/libxl.h
index 2bbbd21f0b..30e5aee119 100644
--- a/tools/include/libxl.h
+++ b/tools/include/libxl.h
@@ -278,6 +278,11 @@
  */
 #define LIBXL_HAVE_BUILDINFO_ARCH_ARM_TEE 1
 
+/*
+ * libxl_domain_build_info has the arch_arm.sci field.
+ */
+#define LIBXL_HAVE_BUILDINFO_ARCH_ARM_SCI 1
+
 /*
  * LIBXL_HAVE_SOFT_RESET indicates that libxl supports performing
  * 'soft reset' for domains and there is 'soft_reset' shutdown reason
diff --git a/tools/libs/light/libxl_types.idl b/tools/libs/light/libxl_types.idl
index 1080966c33..1878c115c3 100644
--- a/tools/libs/light/libxl_types.idl
+++ b/tools/libs/light/libxl_types.idl
@@ -480,6 +480,11 @@ libxl_tee_type = Enumeration("tee_type", [
     (1, "optee")
     ], init_val = "LIBXL_TEE_TYPE_NONE")
 
+libxl_arm_sci_type = Enumeration("arm_sci_type", [
+    (0, "none"),
+    (1, "scmi_smc")
+    ], init_val = "LIBXL_ARM_SCI_TYPE_NONE")
+
 libxl_rdm_reserve = Struct("rdm_reserve", [
     ("strategy",    libxl_rdm_reserve_strategy),
     ("policy",      libxl_rdm_reserve_policy),
@@ -564,6 +569,7 @@ libxl_domain_build_info = Struct("domain_build_info",[
     ("apic",             libxl_defbool),
     ("dm_restrict",      libxl_defbool),
     ("tee",              libxl_tee_type),
+    ("arm_sci",          libxl_arm_sci_type),
     ("force_assign_without_iommu", libxl_defbool),
     ("u", KeyedUnion(None, libxl_domain_type, "type",
                 [("hvm", Struct(None, [("firmware",         string),
diff --git a/tools/xl/xl_parse.c b/tools/xl/xl_parse.c
index 67fa96d949..d53c9b1271 100644
--- a/tools/xl/xl_parse.c
+++ b/tools/xl/xl_parse.c
@@ -2747,6 +2747,15 @@ skip_usbdev:
         }
     }
 
+    if (!xlu_cfg_get_string (config, "arm_sci", &buf, 1)) {
+        e = libxl_arm_sci_type_from_string(buf, &b_info->arm_sci);
+        if (e) {
+            fprintf(stderr,
+                    "Unknown arm_sci \"%s\" specified\n", buf);
+            exit(-ERROR_FAIL);
+        }
+    }
+
     xlu_cfg_get_defbool(config, "force_assign_without_iommu",
                         &b_info->force_assign_without_iommu, 0);
 
-- 
2.27.0