Adding support for AWS Graviton3 processors

Author: kelbrown20

modules/installation-configuration-parameters.adoc

@@ -701,11 +701,15 @@ link:https://yaml.org/spec/1.2/spec.html#sequence//[YAML sequence].
 
 |`compute.aws.region`
 |The AWS region that the installation program creates compute resources in.
-|Any valid link:https://docs.aws.amazon.com/general/latest/gr/rande.html[AWS region], such as `us-east-1`.
+|Any valid link:https://docs.aws.amazon.com/general/latest/gr/rande.html[AWS region], such as `us-east-1`. You can use the AWS CLI to access the regions available based on your selected instance type. For example:
+[source,terminal]
+----
+aws ec2 describe-instance-type-offerings --filters Name=instance-type,Values=c7g.xlarge
+---- 
 ifndef::openshift-origin[]
 [IMPORTANT]
 ====
-When running on ARM based AWS instances, ensure that you enter a region where AWS Graviton processors are available. See link:https://aws.amazon.com/ec2/graviton/#Global_availability[Global availability] map in the AWS documentation.
+When running on ARM based AWS instances, ensure that you enter a region where AWS Graviton processors are available. See link:https://aws.amazon.com/ec2/graviton/#Global_availability[Global availability] map in the AWS documentation. Currently, AWS Graviton3 processors are only available in some regions.
 ====
 endif::openshift-origin[]
 

modules/installation-supported-aws-machine-types.adoc

@@ -490,6 +490,41 @@ ifndef::aws-govcloud,aws-secret,aws-china,openshift-origin[]
 |x
 |x
 
+|`c7g.large`
+|x
+|
+|
+
+|`c7g.xlarge`
+|
+|x
+|x
+
+|`c7g.2xlarge`
+|
+|x
+|x
+
+|`c7g.4xlarge`
+|
+|x
+|x
+
+|`c7g.8xlarge`
+|
+|x
+|x
+
+|`c7g.12xlarge`
+|
+|x
+|x
+
+|`c7g.16large`
+|
+|x
+|x
+
 |===
 ====
 endif::[]