cfn_iam_policy.tf

AWSTemplateFormatVersion: 2010-09-09
Description: IAM policy
Resources:
 ExamplePolicy:
   Type: 'AWS::IAM::Policy'
   Properties:
     PolicyName: root
     PolicyDocument:
       Version: 2012-10-17
       Statement:
         - Effect: Allow
           Action:
             - "iam:PassRole"
             - "lambda:CreateFunction"
             - "lambda:CreateEventSourceMapping"
             - "dynamodb:CreateTable"
             - "dynamodb:PutItem"
           Resource: '*'

serverless.yaml

provider:
 name: aws
 runtime: nodejs10.x
resources:
 Resources:
   ExamplePolicy:
     Type: 'AWS::IAM::Policy'
     Properties:
       PolicyName: root
       PolicyDocument:
         Version: 2012-10-17
         Statement:
           - Effect: Allow
             Action:
               - "iam:PassRole"
               - "lambda:CreateFunction"
               - "lambda:CreateEventSourceMapping"
               - "dynamodb:CreateTable"
               - "dynamodb:PutItem"
             Resource: '*'

terraform_iam_policy.tf

data "aws_iam_policy_document" "example" {
 statement {
   sid = "1"
   effect = "Allow"
   actions = [
     "iam:PassRole",
     "lambda:CreateFunction",
     "lambda:CreateEventSourceMapping",
     "dynamodb:CreateTable",
     "dynamodb:PutItem",
   ]
   resources = [
     "*",
   ]
 }
}